Relevant bibliographies by topics / Drives

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Drives'

Author: Grafiati
Published: 4 June 2021
Last updated: 24 January 2023

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Journal articles on the topic "Drives"

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Desmond, Paula A., Peter A. Hancock, and Janelle L. Monette. "Fatigue and Automation-Induced Impairments in Simulated Driving Performance." Transportation Research Record: Journal of the Transportation Research Board 1628, no. 1 (January 1998): 8–14. http://dx.doi.org/10.3141/1628-02.

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A driving simulator study investigated the effect of automation of the driving task on performance under fatiguing driving conditions. In the study, drivers performed both a manual drive, in which they had full control over the driving task, and an automated drive, in which the vehicle was controlled by an automated driving system. During both drives, three perturbing events occurred at early, intermediate, and late phases in the drives: in the automated drive, a failure in automation caused the vehicle to drift toward the edge of the road; in the manual drive, wind gusts resulted in the vehicle drifting in the same direction and magnitude as the “drifts” in the automated drive. Following automation failure, drivers were forced to control the vehicle manually until the system became operational again. Drivers’ lateral control of the vehicle was assessed during three phases of manual control in both drives. The results indicate that performance recovery was better when drivers had full manual control of the vehicle throughout the drive, rather than when drivers were forced to drive manually following automation failure. Drivers also experienced increased tiredness, and physical and perceptual fatigue symptoms following both drives. The findings have important implications for the design of intelligent transportation systems. Systems that reduce the driver’s perceptions of task demands of driving are likely to undermobilize effort in fatigued drivers. Thus, the results strongly support the contention that human-centered transportation strategies, in which the driver is involved in the driving task, are superior to total automation.
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Chen, Desheng, and Qiaoning Xu. "A Swinging and Self-Actuating Friction Drive Device Used in Large-Scale Rotary Devices." Recent Patents on Mechanical Engineering 13, no. 1 (February 12, 2020): 41–48. http://dx.doi.org/10.2174/2212797612666191119102558.

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Background: Large-scale rotary devices often employ friction drives in order to be manufactured easily and usually select a large driving radius to reduce the friction forces needed. In traditional devices, the driver and driven friction wheels are required to be of higher roundness to avoid slipping between them. This makes the driven friction wheel difficult to be machined. In addition, generating adequate contact load between contacting surfaces is essential for friction drives, and the best way to achieve it is self-actuating loading. Objective: The purpose of this paper is to propose and analyze a patent about a new friction drive device, in which the driver friction wheel can roll along with the driven friction wheel throughout, and the contact load between the driver and driven friction wheels can be generated on the torque demand. Methods: By using two swinging gearboxes, the two driver friction wheels are both swinging, and thus both can roll along with the driven friction wheel floatingly. Therefore, the driven wheel can have some deviation in roundness. Besides, this design offers a condition to construct a torque-actuated loading mechanism. Driven by the input torque, each driver wheel turns and exerts a friction force on the driven wheel, and then the driven wheel applies a reactive force to each driver wheel. This reactive force tends to pull the driver wheel to the driven wheel, producing a wedging action. Thus, an appreciable amount of contact load between the driver and driven wheels will be generated. Results: The results show the contact load between the driver and driven friction wheels is directly proportional to the resistant torque acting on the friction drive device. The results also show that a “frictional locking” condition for the device to avoid slipping between the driver and driven friction wheels is needed and it depends on the geometric parameters of the device. Conclusion: A swinging and self-actuating friction drive device is developed by using two swinging gearboxes. Design principles were described and a design example for this friction drive device was demonstrated. This kind of friction drive device not only offers an alternative way to drive large-scale rotary devices, but also develops a new method to realize self-actuating loading for friction drives.
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Krasnova, Oleksandra, Brett Molesworth, and Ann Williamson. "Understanding the Effect of Feedback on Young Drivers’ Speeding Behavior." Proceedings of the Human Factors and Ergonomics Society Annual Meeting 60, no. 1 (September 2016): 1986–90. http://dx.doi.org/10.1177/1541931213601452.

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The aim of the present study was to empirically investigate the effect of various types of feedback on young novice drivers’ speed management behavior. One hundred young drivers, randomly allocated to five groups, completed three test drives using a computer-based driving simulator. For four groups, feedback was provided after an 11km drive and focused on speeding behavior, the safety implications of speeding or the financial penalties if caught speeding or all three. The fifth group was a no-feedback control. Driver speed management performance was examined in two 11km drives immediately following the receipt of feedback and one week post feedback. The results showed that all types of Feedback were effective in improving young drivers’ speed management behavior compared to the control group. Providing feedback about financial implications of speeding was found to be the best in improving young drivers’ speed management behavior across all tested conditions. These findings have important implications for the development of a new approach to improve young drivers’ speed management behavior.
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LEE, Adrian, Andrew HILLSDEN, Yoshihiro ONO, and Stephen EVANS. "TD-03 FULL-TOROIDAL TRACTION DRIVE HIGH TEMPERATURE DURABILITY(TRACTION DRIVES)." Proceedings of the JSME international conference on motion and power transmissions 2009 (2009): 658–65. http://dx.doi.org/10.1299/jsmeimpt.2009.658.

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Desmond, P. A., and P. A. Hancock. "Motivation, and Fatigue-Related Impairments in Simulated Driving." Proceedings of the Human Factors and Ergonomics Society Annual Meeting 41, no. 2 (October 1997): 1003–7. http://dx.doi.org/10.1177/107118139704100262.

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The effect of a motivational manipulation in reducing fatigue-related impairments in simulated driving performance was examined. Drivers performed both a fatiguing drive and a control drive. The motivational manipulation, a driving skill assessment instruction, appeared in early and late stages of both drives. Lateral control of the vehicle was assessed on straight and curved road sections early and late during the assessment instruction in both drives. The results indicate that the instruction only affected straight-road driving in the later part of both drives. During the later part of the control drive, the instruction produced a performance improvement only while the instruction was actually presented. In the fatigue drive, performance continued to improve even after cessation of the instruction, converging to the level of control drive performance. Fatigued drivers remain capable of increasing task effort in response to a motivating instruction, but fatigue may impair the ability to synchronize effort with changing task demands.
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Aliyeva, Sevda, Javida Damirova, and Sevinc Abasova. "Research of the problem of optimization and development of a calculation method for two-stage chain drives used in heavy industrial vehicles in conditions of economic efficiency." EUREKA: Physics and Engineering, no. 4 (July 23, 2021): 105–12. http://dx.doi.org/10.21303/2461-4262.2021.001930.

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The article is dedicated to the problem of optimization of chain drives of the drilling unit. At present, increasing the power per machine to the optimal limits, reducing the material and energy consumption per unit capacity of the machine, as well as operating costs are considered topical issues. The machines that are designed and constructed to optimal limits must be very powerful and productive. The machines that are applied to perform drilling works in the oil and gas industry must be easy to operate, reliable and have ability to operate for a long time. When constructing such machines, their being lightweight, economical, as well as their preparation in a short time and at low cost should be taken into account in advance. In order to ensure the reliable operation of drilling rigs, it is more expedient to apply chain drive in their mechanical transmission. First of all, the application of chain drive in drilling units and hoisting mechanisms is considered. Then a calculation method was developed for the chain drives of the drilling unit used in deep exploration wells and the exploitation of wells, and, accordingly, the calculation of the chain drive was carried out. The chain drive consists of drive and driven sprockets and a chain that encompasses the sprockets and engages in their teeth. Chain drives with several driven sprockets are also used. In addition to the basic listed elements, chain drives include tensioners, lubricating device and guards. The chain consists of hinged links that provide mobility or “flexibility” of the chain. Chain drives can be performed in a wide range of parameters. The calculation took into account the quality of the material, the service life and durability of the chain drive construction
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Edwards, C. "Drive for power [industrial drives]." Engineering & Technology 9, no. 3 (April 1, 2014): 78–81. http://dx.doi.org/10.1049/et.2014.0311.

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Hughes, G. F. "Wise drives [hard disk drive]." IEEE Spectrum 39, no. 8 (August 2002): 37–41. http://dx.doi.org/10.1109/mspec.2002.1021942.

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Price, T. A. R., R. Verspoor, and N. Wedell. "Ancient gene drives: an evolutionary paradox." Proceedings of the Royal Society B: Biological Sciences 286, no. 1917 (December 18, 2019): 20192267. http://dx.doi.org/10.1098/rspb.2019.2267.

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Selfish genetic elements such as selfish chromosomes increase their transmission rate relative to the rest of the genome and can generate substantial cost to the organisms that carry them. Such segregation distorters are predicted to either reach fixation (potentially causing population extinction) or, more commonly, promote the evolution of genetic suppression to restore transmission to equality. Many populations show rapid spread of segregation distorters, followed by the rapid evolution of suppression. However, not all drivers display such flux, some instead persisting at stable frequencies in natural populations for decades, perhaps hundreds of thousands of years, with no sign of suppression evolving or the driver spreading to fixation. This represents a major evolutionary paradox. How can drivers be maintained in the long term at stable frequencies? And why has suppression not evolved as in many other gene drive systems? Here, we explore potential factors that may explain the persistence of drive systems, focusing on the ancient sex-ratio driver in the fly Drosophila pseudoobscura . We discuss potential solutions to the evolutionary mystery of why suppression does not appear to have evolved in this system, and address how long-term stable frequencies of gene drive can be maintained. Finally, we speculate whether ancient drivers may be functionally and evolutionarily distinct to young drive systems.
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Chen, De Sheng, Hong Song, and Fei Yan Lou. "A Floating and Self-Actuating Friction Drive Device for a Revolving Stage." Key Engineering Materials 450 (November 2010): 329–32. http://dx.doi.org/10.4028/www.scientific.net/kem.450.329.

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Friction drives offer certain advantages over gears. In particular, they generally run more quietly and are easier to manufacture than geared units. The friction drives used in revolving stages call for a large driving radius in order to reduce friction force. In traditional friction drives, the two friction wheels (driving and driven) must be highly and precisely circular. This makes the manufacture of the driven wheel difficult and uneconomical. In this paper, a floating and self-actuating friction drive device was developed with the use of a swinging gearbox. In this device, the driving wheel is floatable, so the driven wheel is permitted to have certain deviation of roundness in the make and certain eccentricity in the installation. This avoids the difficulties in making and installing the driven wheel. This is a strong point in the applications of the revolving stage and other large-scale revolving devices. Meanwhile, this configuration can adaptively generate a normal torque on demand by using a swinging gearbox. This relieves the friction wheels of a continuous and high-stress load, thus prolonging their workability. Also, this paper described the working principles of this new friction drive device and presented a force analysis.
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Dissertations / Theses on the topic "Drives"

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Schonhardt, Stefan. "Electromagnetic comb-drives." Tönning Lübeck Marburg Der Andere Verl, 2009. http://d-nb.info/995770131/04.

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Kumar, Naren. "Investigation of drive-train dynamics of mechanical transmissions incorporating cycloidal drives." Thesis, Queensland University of Technology, 2015. https://eprints.qut.edu.au/84752/8/Naren%20Kumar%20Thesis.pdf.

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Cycloidal drives are compact, high-ratio gear transmission systems used in a wide range of mechanical applications from conveyor drives to articulated robots. This research hypothesises that these drives can be successfully applied in dynamic loading situations and thereby focuses on the understanding of differences between static and dynamic loading conditions where load varies with time. New methods of studying the behaviour of these drives under static and dynamic loading circumstances were developed, leading to novel understanding and knowledge. A new model was developed to facilitate research and development on Cycloidal drives with potential benefits for manufacturing, robotics and mechanical-process-industries worldwide.
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Khan, Wasim. "Nonlinear and adaptive control of motor drives with compensation of drive electronics." Diss., Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/13895.

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Erdem, Cengiz. "The life death drives." Thesis, University of East Anglia, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.514212.

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Gordon, B. M. "Small induction motor drives." Thesis, University of Cambridge, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.599532.

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Domestic appliances represent very cost conscious applications for drives where the emphasis is on achieving the optimum compromise between cost and performance. The requirements placed on a domestic appliance drive are so radically different from those demanded of an industrial drive, that a detailed re-evaluation of all the constituent sub-units of the drive must be undertaken. Domestic appliances are produced in large volumes so the use of a special arrangement or custom components can be justified if an overall benefit can be demonstrated. The work presented in this dissertation is concerned with small drives which are suitable for domestic appliances. A study of the optimal number of phases for current and possible future power electronic construction methods is presented and their suitability of domestic appliance drives considered. Comparisons based on material utilisation and the quality of the air gap flux waveform are presented. With the power electronic technology available two and three phase drives were found to be the best compromise between cost and complexity, and several drives of each type were built to provide experimental evidence on the performance of each alternative drive topology proposed. The experimental results obtained from the different drives built are related to the conclusions of work on inverter topology and phases number.
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Katsis, Dimosthenis C. "Development of a Testbed for Evaluation of Electric Vehicle Drive Performance." Thesis, Virginia Tech, 1997. http://hdl.handle.net/10919/35482.

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This thesis develops and implements a testbed for the evaluation of inverter fed motor drives used in electric vehicles. The testbed consists of a computer-controlled dynamometer connected to power analysis and data collection tools. The programming and operation and of the testbed is covered. Then it is used to evaluate three pairs of identical rating inverters. The goal is to analyze the effect of topology and software improvements on motor drive efficiency. The first test analyzes the effect of a soft-switching circuit on inverter and motor efficiency. The second test analyzes the difference between space vector modulation (SVM) and current-band hysteresis. The final test evaluates the effect of both soft-switching and SVM on drive performance. The tests begin with a steady state analysis of efficiency over a wide range of torque and speed. Then drive cycles tests are used to simulate both city and highway driving. Together, these dynamic and steady state test results provide a realistic assessment of electric vehicle drive performance.
Master of Science
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Hellany, Ali, of Western Sydney Nepean University, and Faculty of Engineering. "EMI studies in motor drives." THESIS_FENG_XXX_Hellany_A.xml, 1996. http://handle.uws.edu.au:8081/1959.7/688.

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This thesis reviews in general the topic of electromagnetic compatibility, and electromagnetic interference and their origin and effects in modern electronically controlled motor drives. The measurement techniques for EMI noise are reviewed. The sources of noise of a switching power circuit are described. This thesis investigates the establishment of a procedure for measuring conducted emission produced by motor drives, using a virtual instrument. This procedure is based on the traditional methodology of EMI measurement and the use of simulation techniques. A test bench is designed. The thesis covers the detailed design of a virtual instrument for measuring conducted current produced by motor drives. A line impedance stabilisation network LISN is designed and built. A series of measurements were carried out using the developed instrument. The results show very little difference between the conducted emission produced by induction, permanent magnet and reluctance motor drives. Comparing one of the experimental results with published results from a major test laboratory assesses the validity of the designed instrument. The experimental results refer to drive systems under no load conditions. Useful conclusions are drawn and future research studies recommended.
Master of Engineering (Hons)
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Guo, Rong. "What Drives Firms to Diversity?" Digital Archive @ GSU, 2006. http://digitalarchive.gsu.edu/finance_diss/9.

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WHAT DRIVES FIRMS TO DIVERSITY? By RONG GUO Committee Chair: Dr. Omesh Kini Major Department: Finance This paper examines whether corporate governance structures, serving as proxies for agency costs, can explain firms’ decision to diversify. Specifically, it has been hypothesized that firms with worse corporate governance structures are more likely to diversify. The extant literature usually compares the governance characteristics of multi-segment firms to those of single segment firms to address this issue. However, different governance characteristics may simply reflect differences in firm characteristics of diversified firms and focused firms. Furthermore, industry factors may affect both the propensity of firms to diversify and their governance characteristics. To separate out the agency costs explanation of firms’ decision to diversify, I compare the corporate governance structures of single segment firms that choose to diversify with those of a matched sample of single segment firms in the same industry that choose to remain focused. I find that firms with a higher percentage of outsiders on the board and smaller board size are more likely to diversify. These findings are inconsistent with the agency costs explanation of why firms choose to diversify. In addition, the CEO pay-to-performance sensitivity of diversifying firms is also not significantly different from that of firms that stay focused. The corporate governance characteristics cannot explain the changes in excess value around diversification either. Although some of the governance characteristics are significantly related to the announcement effects of diversifying mergers, these relations are often inconsistent with the agency cost explanation. Taken together, my evidence indicates that diversifying firms do not systematically have worse governance structures than firms that stay focused and, therefore, higher agency costs do not appear to drive the decision to diversify.
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Celik, Tuncay. "Segmental rotor switched reluctance drives." Thesis, University of Newcastle Upon Tyne, 2011. http://hdl.handle.net/10443/1286.

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One of the well-known drawbacks of switched reluctance machines is the relatively high output torque ripple. Techniques aiming to reduce machine torque ripple either compromise the machine performance or the simplicity of the inverter and the controller. The work presented in this thesis shows that low torque ripple over a wide speed range can be achieved without severe penalties in terms of the machine performance and the size, cost and complexity of the power electronics and the controller. This is achieved by designing a 6-phase machine and driving it from a three-phase full bridge circuit. Switched reluctance motors with segmented rotors are a relatively recent advancement in the electromagnetic design of doubly-salient reluctance motors, having only been introduced in 2002. By replacing the conventional toothed rotor with individual segments, it has been proven that higher torque density than conventional switched reluctance machines could be achieved. Early work by Mecrow and El-Kharashi has demonstrated the operation of prototype machines with short-pitched and fully-pitched windings. The machine design work presented here builds on this early work by examining aspects of the machine design and its operation. Two six-phase machines – one with a segmented rotor and the other with a toothed rotor - have been designed. Performance comparisons have been made between the two six-phase machines and a three phase segmented rotor machine that was previously designed at Newcastle University. Additionally, a three phase single tooth winding and a two phase segmented rotor switched reluctance machine have been studied in simulation and experimentally. Detailed comparison of inverter ratings and machine efficiencies are made under equal conditions for a 2-phase machine driven from h-bridge and asymmetric half-bridge inverters. This is achieved with results from a test rig and the use of accurate dynamic simulation. Simulation models for 3-phase and 6-phase machines have also been generated. Detailed comparison of inverter ratings and machine efficiencies are made under equal conditions for the 3-phase and 6-phase drives in the dynamic simulation. Comparisons between simulated and measured results are shown to be very good for all of the drives.
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Borman, Stephen. "Sensorless drives for aerospace applications." Thesis, University of Newcastle Upon Tyne, 2012. http://hdl.handle.net/10443/1447.

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This Engineering Doctorate thesis investigates the different implementations and theories allowing drives to control motors using sensorless techniques that could be used in an aerospace environment. A range of converter topologies and their control will be examined to evaluate the possible techniques that will allow a robust and reliable drive algorithm to be implemented. The focus of the research is around sensorless drives for fuel pump applications, with the potential to replace an existing analogue implementation that is embedded in a fuel pump, contained within the fuel tank. The motor choice (Brushless DC) reflects the requirement for endurance and tight speed control over the life of the aircraft. The study of currently understood sensorless control will allow a critical analysis over the best and most robust sensorless control technique for a controller of this nature, where reliability is a fundamental requirement.
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Books on the topic "Drives"

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magazine, Country Country. Country Travel Scenic Drives: Scenic Drives. Milwaukee, WI: RDA Enthusiast Brands, LLC, 2020.

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A, Nasar S., ed. Electric drives. 2nd ed. Boca Raton, Fla: CRC/Taylor & Francis, 2006.

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Boldea, I. Electric drives. 2nd ed. Boca Raton, FL: Taylor & Francis/CRC Press, 2005.

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Beater, Peter. Pneumatic Drives. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-69471-7.

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Jufer, Marcel. Electric Drives. Hoboken, NJ USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118622735.

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Gloria, ed. Who drives? London: Collins Educational, 1999.

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Boldea, I. Electric drives. Boca Raton, Fla: CRC Press, 1998.

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Electronic drives. New York: TAB Books, 1996.

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A, Nasar S., ed. Electric drives. Boca Raton: CRC Press, 1999.

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Jufer, Marcel. Electric drives. London: ISTE, 2010.

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Book chapters on the topic "Drives"

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Jandrić, Petar, and Sarah Hayes. "Who Drives the Drivers?" In The Wiley Handbook of Global Educational Reform, 307–22. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2018. http://dx.doi.org/10.1002/9781119082316.ch15.

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Teitelbaum, Stefanie. "Drives." In Encyclopedia of Psychology and Religion, 701–2. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-24348-7_186.

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Fruchtbaum, Jacob. "Drives." In Bulk Materials Handling Handbook, 243–53. Boston, MA: Springer US, 1988. http://dx.doi.org/10.1007/978-1-4757-4695-2_9.

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Bauer, Alice, and Joseph Torrente. "Drives." In Psychoanalysts in Session, 194–96. Abingdon, Oxon; New York, NY: Routledge, 2021. | Series: The new library of psychoanalysis | “Published in French, 2016”–Title page verso.: Routledge, 2020. http://dx.doi.org/10.4324/9780429196751-9.

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Teitelbaum, Stefanie. "Drives." In Encyclopedia of Psychology and Religion, 537–38. Boston, MA: Springer US, 2014. http://dx.doi.org/10.1007/978-1-4614-6086-2_186.

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Diamond, Stephen A., Paul Larson, Jennifer Amlen, Kathryn Madden, Kathryn Madden, Todd DuBose, Bonnie Smith Crusalis, et al. "Drives." In Encyclopedia of Psychology and Religion, 258–59. Boston, MA: Springer US, 2010. http://dx.doi.org/10.1007/978-0-387-71802-6_186.

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Harvey, Adam. "13. Introduction; Direct Coupled Drives; Belt Drives; Belt Drive Calculations." In Micro-Hydro Design Manual, 197–217. Rugby, Warwickshire, United Kingdom: Practical Action Publishing, 1993. http://dx.doi.org/10.3362/9781780445472.013.

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Jufer, Marcel. "Direct Drives." In Electric Drives, 187–206. Hoboken, NJ USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118622735.ch11.

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Jufer, Marcel. "Integrated Drives." In Electric Drives, 207–12. Hoboken, NJ USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118622735.ch12.

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Jufer, Marcel. "Introduction - Electric Drive Components." In Electric Drives, 1–4. Hoboken, NJ USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118622735.ch1.

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Conference papers on the topic "Drives"

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Hidajat, Taofik, Agung Hendra Kusuma, and Achmad Sulchan. "Gamification in Ride-Hailing: What Drives a Driver to Drive." In The 3rd International Conference on Banking, Accounting, Management and Economics (ICOBAME 2020). Paris, France: Atlantis Press, 2020. http://dx.doi.org/10.2991/aebmr.k.210311.047.

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Lakhkar, Nikhil R. "Thermal Design of Variable Frequency Drives for Hybrid and Electric Transport Applications." In ASME 2021 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/ipack2021-68870.

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Abstract The Electrification of commercial vehicles is happening at a rapid pace. Most of the major automotive corporations are pursuing this opportunity to include electric vehicles in their portfolios. The commercial trucking industry has also been exploring the use of electric vehicles for goods transport including perishables. The transition to electrically driven vehicles has led to the need for electrically driven HVAC systems. To support this evolving commercial market, we developed an electrically driven variable speed compressor platform comprising of compressor and variable frequency drive (VFD). The product platform addresses two categories of vehicles: 1) Hybrid vehicle – the vehicle in this category uses conventional IC engine and has traditional batteries that output 48VDC. 2) Electric vehicle – the vehicle in this category is electrically driven using battery bank or traction drive that gives 650VDC as output. Hence, 650V DC is input to VFD. Both these applications were addressed with two drive designs. In this paper, we discuss the thermal design aspects of both 48V and 650V variable frequency drives. In this publication, the product development process is described from product conception, to final product. The mechanical / environmental design considerations while designing these drives were, (1) The drive was expected to be mounted under the vehicle bed and hence should be strong enough to withstand shock and vibration, (2) the drive was decided to be air cooled (4) the drive was designed to be IP67 so that it can withstand harsh road conditions, (5) the desired operating temperature range was between −40°C to 85°C for 48V and −40°C to 65°C for 650V and (6) the estimated time of service was expected to be 10 years. We were able to achieve an operating margin of −40°C to 70°C at full load for hybrid vehicle drive (48VDC) and −40°C to 65°C for electric vehicle drive (650VDC) using air cooling.
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Taher, Matt, Dragan Ristanovic, Cyrus Meher-Homji, and Pradeep Pillai. "Matching of Synchronous Motors and Centrifugal Compressors: Oil and Gas Industry Practice." In ASME Turbo Expo 2020: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/gt2020-15643.

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Abstract Synchronous motor driven centrifugal compressors are widely used in the oil and gas industry. In evaluating the optimum selection of synchronous motor drivers for centrifugal compressors, it is important to understand the factors influencing a proper match for a centrifugal compressor and its synchronous motor driver. The buyer should specify process requirements and define possible operating scenarios for the entire life of the motor driven centrifugal compressor train. The compressor designer will use the buyer-specified process conditions to model the aerothermodynamic behavior of the compressor and characterize its performance. Performance, controllability, starting capabilities as well as the optimum power margin required for a future-oriented design must also be considered. This paper reviews the criteria for evaluating the optimal combination of a centrifugal compressor and its synchronous motor driver as an integral package. It also addresses API standard requirements on synchronous motor driven centrifugal compressors. Design considerations for optimal selection and proper sizing of compressor drivers include large starting torque requirements to enable compressor start from settle-out conditions and to prevent flaring are addressed. Start-up capabilities of the motor driver can significantly impact the reliability and operability of the compressor train. API 617 on centrifugal compressors refers to API 546 for synchronous motor drivers. In this paper, requirements of API 617 and 546 are reviewed and several important design and sizing requirements are presented. In the effort to optimize plant design, and maintain the performance requirements, the paper discusses optimization options, such as direct on-line starting method to explore the motor rating limits, and the use of synchronous motors for power factor correction to eliminate or reduce the need for reactive power compensation by capacitor banks. This paper presents a novel approach to show constant reactive power lines on traditional V curves. It also complements capability curves of synchronous motors with lines of constant efficiency. The paper discusses variable frequency drive options currently used for synchronous motors in compressor applications. The paper addresses the available variable frequency drive types, their impact on the electrical grid, and motor design considerations with a view to summarizing factors important to the selection of variable frequency drives.
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Schmidt, Lasse, Torben O. Andersen, Henrik C. Pedersen, and Anders H. Hansen. "An Energy Efficient Hydraulic Winch Drive Concept Based on a Speed-Variable Switched Differential Pump." In ASME/BATH 2017 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/fpmc2017-4266.

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The application of valve driven hydraulic winch drives is related to substantial power losses, primarily due to throttle generated valve flows. More energy efficient solutions are also commonly applied in terms of conventional hydrostatic closed circuit drives as well as so-called secondary controls. Such solutions are typically constituted by many and rather expensive components, and are furthermore often suffering from low frequency dynamics. In this paper an alternative solution is proposed for winch drive operation, which is based on the so-called speed-variable switched differential pump, originally designed for direct drive of hydraulic differential cylinders. This concept utilizes three pumps, driven by a single electric servo drive. The concept is redesigned for usage in winch drives, driven by flow symmetric hydraulic motors and single directional loads as commonly seen in e.g. active heave compensation applications. A general drive configuration approach is presented, along with a proper control strategy and design. The resulting concept is evaluated when applied for active heave compensation. Results demonstrate control performance on level with conventional valve solutions in terms of motion tracking, however with improved efficiency, especially in the event that the electrical servo drive can realize four quadrant operation.
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Hanbal, Rajesh Dinesh, Amit Prakash, and Janaki Srinivasan. "Who drives data in data-driven governance?" In ICEGOV 2020: 13th International Conference on Theory and Practice of Electronic Governance. New York, NY, USA: ACM, 2020. http://dx.doi.org/10.1145/3428502.3428576.

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"SS direct-drive electric machines and drives." In IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society. IEEE, 2017. http://dx.doi.org/10.1109/iecon.2017.8216629.

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Samper Mejia, Juan Pablo, Paul A. Theodosis, and J. Christian Gerdes. "Using a Path-Fitting Algorithm to Analyze the Racing Techniques of a Skilled Driver." In ASME 2013 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/dscc2013-4106.

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Racecar drivers are skilled at tracking a path, avoiding accidents, and controlling their vehicles at the limits of handling. Better understanding of how a skilled driver selects and drives a racing line, could potentially lead to a new technique for obstacle avoidance. To investigate this, the characteristics of a racecar driver’s line must be captured mathematically. This paper describes an algorithm for fitting a path to the GPS data of a driver’s racing line. A family of path primitives composed of straights, clothoids, and constant radius arcs are used to describe the racing line. The fitted paths provide a method for analyzing racing lines and the different techniques used by skilled drivers to navigate the track.
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Arora, T. G., M. V. Aware, and D. R. Tutakne. "Insulation stress in PWM driven adjustable frequency drives." In 2013 10th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON 2013). IEEE, 2013. http://dx.doi.org/10.1109/ecticon.2013.6559471.

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Gerbert, Göran. "Driven Pulley Jumping of Timing Belts." In ASME 1992 Design Technical Conferences. American Society of Mechanical Engineers, 1992. http://dx.doi.org/10.1115/detc1992-0063.

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Abstract A model and criterium for the jumping limit torque of timing belt drives are presented. The following parameters are considered: pulley geometry, belt geometry, belt strain stiffness, belt tooth stiffness, belt flexural rigidity, shaft stiffness and initial tension. Friction is important in separating jumping on driver and driven pulleys since the jumping behaviour is different at the two sides. Other parameters might influence the jumping limit torque as well. Moreover, great care must be taken to get good parameter data from the test setup. The present analysis is restricted to driven pulleys. Calculated results of jumping limit torque and shaft load are presented for an XL-belt drive. The results exhibit the same behaviour as test results presented in the literature.
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Leamy, Michael J., and Tamer M. Wasfy. "Dynamic Finite Element Modeling of Belt-Drives." In ASME 2001 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/detc2001/vib-21342.

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Abstract In this study, a dynamic finite element model is developed for pulley belt-drive systems. The belt is modeled using truss elements, while the pulleys are modeled using rotating circular constraints, for which the driver pulley’s angular velocity is prescribed. Frictional contact between the pulleys and the belt is modeled using a penalty formulation with frictional contact governed by a Coulomb-like tri-linear friction law. The dynamic response of the drive is then studied by incorporating the model into an explicit finite element code, which can maintain time-accuracy for arbitrarily large rotations and for long simulation times. The finite element solution is validated through comparison to an exact analytical solution of a steadily-rotating, two-pulley drive. Several response quantities are compared, including the normal and tangential (friction) force distributions between the pulleys and the belt, the driven pulley angular velocity, and the belt span tensions. Excellent agreement is found.
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Reports on the topic "Drives"

1

Leitherer, Art. Adjustable Speed Drives. Fort Belvoir, VA: Defense Technical Information Center, January 1995. http://dx.doi.org/10.21236/ada296349.

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Rodrik, Dani. What Drives Public Employment? Cambridge, MA: National Bureau of Economic Research, August 1997. http://dx.doi.org/10.3386/w6141.

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Bloom, Nicholas, Erik Brynjolfsson, Lucia Foster, Ron Jarmin, Megha Patnaik, Itay Saporta-Eksten, and John Van Reenen. What Drives Differences in Management? Cambridge, MA: National Bureau of Economic Research, March 2017. http://dx.doi.org/10.3386/w23300.

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Ghosh, Anisha, and George Constantinides. What Information Drives Asset Prices? Cambridge, MA: National Bureau of Economic Research, August 2017. http://dx.doi.org/10.3386/w23689.

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Gompers, Paul, and Josh Lerner. What Drives Venture Capital Fundraising? Cambridge, MA: National Bureau of Economic Research, January 1999. http://dx.doi.org/10.3386/w6906.

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Cosar, A. Kerem, Paul L. Grieco, Shengyu Li, and Felix Tintelnot. What Drives Home Market Advantage? Cambridge, MA: National Bureau of Economic Research, September 2015. http://dx.doi.org/10.3386/w21583.

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Comnes, G. A., and R. W. Barnes. Efficient alternatives for electric drives. Office of Scientific and Technical Information (OSTI), November 1987. http://dx.doi.org/10.2172/5804475.

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Vuolteenaho, Tuomo. What Drives Firm-Level Stock Returns? Cambridge, MA: National Bureau of Economic Research, April 2001. http://dx.doi.org/10.3386/w8240.

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Budihas, Christopher L. What Drives Pakistan's Interest in Afghanistan? Fort Belvoir, VA: Defense Technical Information Center, May 2011. http://dx.doi.org/10.21236/ada545240.

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Mcleod, Caroline, and Eric Tranby. Pandemic Drives Dental Provider Confidence in Telehealth. CareQuest Institute for Oral Health, August 2021. http://dx.doi.org/10.35565/cqi.2021.2035.

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