Journal articles: 'Speed variable drives'

1

BARTON, T. H. "VARIABLE FREQUENCY VARIABLE SPEED AC DRIVES." Electric Machines & Power Systems 12, no. 3 (January 1987): 143–63. http://dx.doi.org/10.1080/07313568708960100.

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2

Strangas, E. G., V. E. Wagner, and T. D. Unruh. "Variable speed drives evaluation test." IEEE Industry Applications Magazine 4, no. 1 (1998): 53–57. http://dx.doi.org/10.1109/2943.644887.

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3

Drury, W., and D. Grant. "Variable-speed drives - the future." Power Engineering Journal 8, no. 1 (February 1, 1994): 27–34. http://dx.doi.org/10.1049/pe:19940103.

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4

Herák, D., V. Šleger, R. Chotěborský, K. Houška, and E. Janča. "Kinematical characteristic of mechanical frictional variable speed drive." Research in Agricultural Engineering 52, No. 2 (February 7, 2012): 61–68. http://dx.doi.org/10.17221/4881-rae.

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The paper describes a new system of mechanical spherical conical friction drive. In the present a row of simple friction, belt, chain, wave and differential variable speed drives is published. For the required range of speed variation they are altogether unfit. The currently used power transmissions are of low efficiency (60–70%). Therefore the better power transmission efficiency is required. The possibility of multicontact power transmission appears as the most suitable principle of the power transmission. Using the designed function model, which was made according to the small tractor producers requirements, the real output kinematical characteristic was measured. It is derived the complete drive conversion unit kinematics and the theoretical kinematical characteristic design. The theoretical design is compared with the real characteristic determined by measuring using the test station. From the measured values we determined that the geometrical characteristic, i.e. the relation between output speed and ring position, corresponds in the ring position range (2.8÷14) mm to the theoretical premise.

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Bodson, J. M. "Digital Control Improves Variable Speed Drives." EPE Journal 2, no. 4 (January 1992): 243–48. http://dx.doi.org/10.1080/09398368.1992.11463303.

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Tolvanen, Jukka. "Saving energy with variable speed drives." World Pumps 2008, no. 501 (June 2008): 32–33. http://dx.doi.org/10.1016/s0262-1762(08)70164-0.

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7

Medford, D. C. "Power Electronics and Variable Speed Drives." IEE Review 35, no. 1 (1989): 36. http://dx.doi.org/10.1049/ir:19890014.

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8

Darley, Dana. "Conveying Savings via Variable Speed Drives." Plastics Engineering 70, no. 2 (February 2014): 40–41. http://dx.doi.org/10.1002/j.1941-9635.2014.tb01124.x.

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9

Davis, R. M. "Power Electronics and Variable Speed Drives." Power Engineering Journal 3, no. 6 (1989): 310. http://dx.doi.org/10.1049/pe:19890052.

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10

Stokes, R. W. "Power Electronics and Variable Speed Drives." Power Engineering Journal 5, no. 5 (1991): 248. http://dx.doi.org/10.1049/pe:19910048.

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11

Bassarear, J. H., and P. F. Thomas. "Variable speed drives for semiautogenous mills." Mining, Metallurgy & Exploration 3, no. 2 (May 1986): 136–44. http://dx.doi.org/10.1007/bf03402650.

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12

Zagar, Philipp, Helmut Kogler, Rudolf Scheidl, and Bernd Winkler. "Hydraulic Switching Control Supplementing Speed Variable Hydraulic Drives." Actuators 9, no. 4 (December 4, 2020): 129. http://dx.doi.org/10.3390/act9040129.

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Primary control of linear motion by variable speed electric motors driving a hydraulic cylinder via a constant displacement pump is an established and successful concept with a frequent use in industry. One problem arises when low or zero motion speed has to be realized under high pump pressure conditions. Such load scenarios occur frequently in certain pressing processes, e.g., for sintering or veneering. Most pumps have a lower speed limit, below which critical tribological conditions occur which impair lifespan and efficiency. In addition, pump speed control and pump fluctuation suffer from the mixed lubrication conditions in such an operation range. For a circumvention of such low speed pump operation, a digital valve control concept is presented and studied in this paper. Valve control is used in load holding phases with low speed. Pressure is provided by an accumulator which is charged by the pump in short charging cycles at reasonable pump speeds. It is shown that the mean control error during load holding phase lies within the desired band and the fluctuations of the control force are lower than those of the pump control. In addition, the unfavorable pump operation conditions can be avoided via digital control.

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13

Ritchie, Neil, and Martin Briant. "Variable speed drives cuts 20% energy costs." World Pumps 2014, no. 10 (October 2014): 18–19. http://dx.doi.org/10.1016/s0262-1762(14)70237-8.

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14

Hudgins, Jerry, and Rik De Doncker. "Power Semiconductor Devices: For Variable Speed Drives." IEEE Industry Applications Magazine 18, no. 4 (July 2012): 18–25. http://dx.doi.org/10.1109/mias.2012.2191341.

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15

Gibson, Ian H. "Variable-speed drives as flow control elements." ISA Transactions 33, no. 2 (July 1994): 165–69. http://dx.doi.org/10.1016/0019-0578(94)90049-3.

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16

Hasan, Md Ehtesham, K. Dasgupta, and Sanjoy Ghoshal. "Comparison of the efficiency of the high speed low torque hydrostatic drives using bent axis motor: An experimental study." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 231, no. 4 (December 11, 2015): 650–66. http://dx.doi.org/10.1177/0954408915622413.

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This article is aimed at analysing the steady-state performance of four hydrostatic drives and compares their overall efficiency. The speed of the hydrostatic drives is controlled by speed controlled vane pump, variable displacement flow compensated pump, variable displacement pressure compensated pump and proportional direction controlled valve. Bondgraph simulation technique is used to model the hydrostatic drive. The relationships of the loss coefficients with the state variables obtained from the model are identified through experimental investigation. Using them, at different torque levels, the performances of the hydrostatic drives are studied on their slips, torque losses and the overall efficiencies and they are validated experimentally. It is found that hydrostatic drive using speed controlled vane pump exhibits the maximum efficiency, whereas the poorest efficiency is shown by the valve controlled system out of the four drives considered in the analysis.

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17

Lönnberg, Mikko. "Variable Speed Drives for energy savings in hospitals." World Pumps 2007, no. 494 (November 2007): 20–24. http://dx.doi.org/10.1016/s0262-1762(07)70395-4.

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18

Bartolucci, E. J., and B. H. Finke. "Cable design for PWM variable-speed AC drives." IEEE Transactions on Industry Applications 37, no. 2 (2001): 415–22. http://dx.doi.org/10.1109/28.913704.

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19

Stronach, A. F., and P. Vas. "Variable-speed drives incorporating interacting multiloop adaptive controllers." IEE Proceedings - Control Theory and Applications 142, no. 5 (September 1, 1995): 411–19. http://dx.doi.org/10.1049/ip-cta:19951981.

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20

Hall, J. K. "Book review: Power Electronics and Variable-Speed Drives." IEE Proceedings B Electric Power Applications 132, no. 2 (1985): 115. http://dx.doi.org/10.1049/ip-b.1985.0016.

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21

Sbarbaro, Daniel. "CONTROL OF CRUSHING CIRCUITS WITH VARIABLE SPEED DRIVES." IFAC Proceedings Volumes 38, no. 1 (2005): 80–84. http://dx.doi.org/10.3182/20050703-6-cz-1902.01692.

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22

Yacamini, R., P. Brogan, W. Phang, and A. Scott. "Variable speed drives for remote downhole pump applications." Power Engineering Journal 14, no. 1 (February 1, 2000): 29–36. http://dx.doi.org/10.1049/pe:20000105.

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23

Guerrero, Jose Manuel, Gustavo Navarro, Kumar Mahtani, and Carlos Platero. "Ground Fault Detection Method for Variable Speed Drives." IEEE Transactions on Industry Applications 57, no. 3 (May 2021): 2547–58. http://dx.doi.org/10.1109/tia.2021.3064001.

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24

NANDAM, PRADEEP K., and P. C. SEN. "Control laws for sliding mode speed control of variable speed drives." International Journal of Control 56, no. 5 (November 1992): 1167–86. http://dx.doi.org/10.1080/00207179208934362.

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25

Sharkov, Oleg, Sergey Koryagin, and Nikolay Velikanov. "Research of working capacity of pulsed variable-speed drives." MATEC Web of Conferences 287 (2019): 07002. http://dx.doi.org/10.1051/matecconf/201928707002.

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The paper presents the results of experimental researches of the basic working capacity characteristics of pulsed variable-speed drives - gear ratio, efficiency factor, and reliability of the eccentric free-wheel mechanisms When conducting research, the main working capacity parameters of the pulsed variable-speed drive (independent factors) changed according to the design of experiment in the range: the load applied to the output shaft was from 250 to 2.750 N·m; adjustable gear ratio - from 20 to 180. It was established that the reliability of the eccentric free-wheel mechanisms is guaranteed when making mechanisms of 100Cr6 steel with hardness not lower than HRCЭ 58…62 with a module of at least 0.75 mm. It was shown that the yield surface, which characterizes the change in the gear ratio of the pulsed variable-speed drive, can be described by a model using first-order polynomials. It was established that with increasing load, a slight increase (at 1.0...9.9%) occurs in the adjusted gear ratio, which has a character close to linear. It was concluded that with an increase in load, the increase in efficiency factor is non-linear and equals 1.8...2.6 times, an increase in the gear ratio causes its linear decrease by 1.13...1.64 times in the dependence close to a linear one. Empirical dependences are obtained to determine the magnitude of the gear ratio and efficiency factor.

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26

Vodovozov, Valery, and Ilja Bakman. "Performance Improvement of Pumps Fed by the Variable Speed Drives." Electrical, Control and Communication Engineering 4, no. 1 (December 1, 2013): 45–51. http://dx.doi.org/10.2478/ecce-2013-0021.

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Abstract Speed inaccuracy decreases the pump efficiency, reliability, and energy saving. This research is devoted to the determination of the ways of accurate speed control of the pump drives operated under changeable loads. The impact of speed inaccuracy on the pump performance is studied. Based on the analysis of methods for the static accuracy improvement, the drawbacks of the traditional approaches have been shown with reference to the pumping applications. A new methodology of the slip compensation has been proposed for implementation to improve the scalar drive performance. It notably decreases the speed inaccuracy of the open-ended pumping applications. The enhanced quality of the drive control at different loading conditions has been shown on a laboratory test bench. Also, for the multi-pump systems this approach results in an additional benefit from the viewpoint of the operation around the best operation point providing a safe pump control both to exclude the pump damage and to improve the process quality.

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27

SZCZYPIŃSKI-SALA, Wojciech, Krzysztof DOBAJ, and Adam KOT. "FRICTIONAL PROBLEMS IN CONTINUOUSLY VARIABLE TRANSMISSION BELT DRIVES." Tribologia, no. 5 (October 31, 2017): 93–100. http://dx.doi.org/10.5604/01.3001.0010.5923.

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The article describes the results of the research carried out on the evaluation of the influence of friction pairs (rubber belt – belt pulley in belt drive) on the ability to transmit power. In order to determine the characteristics of the belt drive operation, measurements were made on a real belt drive from the drive train of a light two-wheeled vehicle. The measurement was carried out in conditions of changes in the dynamic load. The measurements of the belt slip on the belt pulley within the whole range of the changes of gear ratios and angular speed of the engine were made. During the tests, belts made from various rubber mixtures were compared. The values of the friction coefficients between the surface of belts and the belt pulley were measured. Model analyses of the impact of belt slip on the wheel related to the temperature of Belt drive elements were also made. Generally, one can ascertain that, in belt drive systems, power losses are a combination of speed losses and torque losses. The increase in the efficiency of belt drives is possible by decreasing power losses. It is possible to obtain the high performance of continuously variable transmission belt drives with a V- belt solely with the proper choice of the design parameters, which is possible only after the exact recognition of the operational characteristics unique to this class of belt drive systems.

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28

Obukhova, Elena N., Vyacheslav I. Grishchenko, and Grigoriy A. Dolgov. "Formalization of dynamic model of pneumatic drive with variable structure." MATEC Web of Conferences 226 (2018): 02022. http://dx.doi.org/10.1051/matecconf/201822602022.

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The work is devoted to solving the actual technical problem of increasing the speed and accuracy of pneumatic servo drives. Pneumatic drives have a large number of advantages (high speed of the output link, environmental friendliness, low cost, etc.). But having a high compressibility of compressed air limits the possibility of realizing optimal trajectories of motion of control objects. The complexity in the organization of controlling the follow-up pneumatic drive is also introduced by a mathematical apparatus that takes into account the thermodynamic processes during the filling and emptying of the working cavities of a pneumatic cylinder. In connection with this, the goal of this work was the development of a mathematical model of a servomotor with a variable structure that takes into account the various structures of pneumatic valves with proportional control. The proposed mathematical model will make it possible to use the synergetic approach in controlling the pneumatic drive. This makes it possible to take into account not less important drive parameters such as energy efficiency, etc., with increasing speed and accuracy of the drive.

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29

Al – Tahir, Ali Abdul Razzaq. "Sensorless online measurements: application to variable speed drive systems." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 37, no. 1 (January 2, 2018): 29–53. http://dx.doi.org/10.1108/compel-10-2016-0453.

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Purpose Sensorless online measurements, application of variable speed drives has been given a great attention, especially over the past few years. In most of the previous literates dealing with permanent magnet synchronous motor (PMSM) drives, the combination of inter-sampled behavior with high gain design approach has not been discussed yet. This paper aims to discuss this feature in-depth. Design/methodology/approach The study contains a different approach for an observer running with surface-mounted permanent magnet synchronous machine drives to implement sensorless control. Design of sampled data observer methodology for one kind of AC machine having non-linear model and backed by an elegant formal stability convergence analysis using the tools of Lyapunov stability techniques was highly recommended in scientific contributions, and it is yet needed to be solved. Findings In this study, a solution to observation problem is covered and developed by combining ideas from the high-gain design approach and inter-sample predictor based on stator voltage measurements. The output state currents are accessible only at the sampling instant to solve the problem of states observation at continuous-time mode. This allows to reducing the usage of online appliances, improving reliability of control design and saving costs. Practical implications The proposed observer is capable of guaranteeing an acceptable closed loop dynamic response over a wide range of operation region and industrial process for random initial conditions. Originality/value The output state predictor has been interred in constructing the innovation correct term to prove the robustness of the proposed observer against attenuated sampling interval. To validate the theoretical results introduced by the main fundamental theorem and prove the observer stability convergence, the proposed observer is demonstrated through a sample study application to variable speed permanent magnet synchronous machine drive.

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30

Ghoneam, Sobhy, M., Samir, M. Abdel-Rahman, and Dalia, M. El–Gazzar,. "VIBRATION ANALYSIS OF CENTRIFUGAL PUMP WITH VARIABLE SPEED DRIVES." JES. Journal of Engineering Sciences 39, no. 3 (May 1, 2011): 565–79. http://dx.doi.org/10.21608/jesaun.2011.127663.

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31

Pylaev, B. V. "Shaping of Cams for High-Torque Variable-Speed Drives." Russian Engineering Research 39, no. 8 (August 2019): 645–49. http://dx.doi.org/10.3103/s1068798x19080161.

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32

Militão, Lucas A., Caio D. Fernandes, Diego dos Santos, Douglas M. Machado, Marcelo L. Heldwein, Carlos R. Rambo, Alexandre K. da Silva, and Jader R. Barbosa Jr. "A novel cooling geometry for subsea variable speed drives." Applied Thermal Engineering 185 (February 2021): 116483. http://dx.doi.org/10.1016/j.applthermaleng.2020.116483.

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33

Lockwood, M. "Simulation of unstable oscillations in PWM variable-speed drives." IEEE Transactions on Industry Applications 24, no. 1 (1988): 137–41. http://dx.doi.org/10.1109/28.87264.

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34

Bowes, S. R., and T. Davies. "Microprocessor-based development system for PWM variable-speed drives." IEE Proceedings B Electric Power Applications 132, no. 1 (1985): 18. http://dx.doi.org/10.1049/ip-b.1985.0002.

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35

Hwi-Beon Shin. "New antiwindup PI controller for variable-speed motor drives." IEEE Transactions on Industrial Electronics 45, no. 3 (June 1998): 445–50. http://dx.doi.org/10.1109/41.679002.

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36

Drury, W. "Electrical variable-speed drives: mature consumable or radical infant?" Power Engineering Journal 13, no. 2 (April 1, 1999): 65–78. http://dx.doi.org/10.1049/pe:19990205.

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37

McCulloch, M. D., C. F. Landy, W. Levy, and I. MacLeod. "CASED: A simulation package designed for variable speed drives." SIMULATION 57, no. 4 (October 1991): 216–26. http://dx.doi.org/10.1177/003754979105700404.

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38

Campos-Delgado, D. U., D. R. Espinoza-Trejo, and E. Palacios. "Fault-tolerant control in variable speed drives: a survey." IET Electric Power Applications 2, no. 2 (March 1, 2008): 121–34. http://dx.doi.org/10.1049/iet-epa:20070203.

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39

Sequeira, Melwyn, and Sanath Alahakoon. "Energy efficient variable speed drives empowered with torque estimation." Energy Procedia 160 (February 2019): 194–201. http://dx.doi.org/10.1016/j.egypro.2019.02.136.

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40

Othman, Saba A., Jamal A. K. Mohammed, and Farag Mahel Mohammed. "Variable Speed Drives in Electric Elevator Systems: A Review." Journal of Physics: Conference Series 1973, no. 1 (August 1, 2021): 012028. http://dx.doi.org/10.1088/1742-6596/1973/1/012028.

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41

Ram, Ganapathy, and Santha K R. "Review of Sliding Mode Observers for Sensorless Control of Permanent Magnet Synchronous Motor Drives." International Journal of Power Electronics and Drive Systems (IJPEDS) 9, no. 1 (March 1, 2018): 46. http://dx.doi.org/10.11591/ijpeds.v9.i1.pp46-54.

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Permanent magnet synchronous motors (PMSMs) are increasingly used in high performance variable speed drives of many industrial applications. PMSM has many features, like high efficiency, compactness, high torque to inertia ratio, rapid dynamic response, simple modeling and control, and maintenance free operation. Presence of position sensors presents several disadvantages, such as reduced reliability, susceptibility to noise, additional cost and weight and increased complexity of the drive system. For these reasons, the development of alternative indirect methods for speed and position control becomes an important research topic. Advantages of sensorless control are reduced hardware complexity, low cost, reduced size, cable elimination, increased noise immunity, increased reliability and decreased maintenance. The key problem in sensorless vector control of ac drives is the accurate dynamic estimation of the stator flux vector over a wide speed range using only terminal variables (currents and voltages). The difficulty comprises state estimation at very low speeds where the fundamental excitation is low and the observer performance tends to be poor. Moreover, the noises of system and measurements are considered other main problems. This paper presents a comprehensive study of the different sliding mode observer methods of speed and position estimations for sensorless control of PMSM drives.

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42

Kodkin, Vladimir L., and Aleksandr S. Anikin. "Experimental study of the VFD’s speed stabilization efficiency under torque disturbances." International Journal of Power Electronics and Drive Systems (IJPEDS) 12, no. 1 (March 1, 2021): 80. http://dx.doi.org/10.11591/ijpeds.v12.i1.pp80-87.

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The article presents a technique for experimental research of variable frequency drives experiencing periodic torque disturbances of variable frequency. The technique is based on the nonlinear transfer function of a link of an asynchronous electric motor, which forms an electromagnetic torque, proposed in previously published articles. The dependence of the transfer function on the frequency of the stator voltage and slip determines the research methodology. Experiments have shown the advantage of the dynamic characteristics of a drive with a positive feedback on the stator current over electric drives with traditional control methods (vector and scalar sensorless), and in terms of dynamic characteristics they also exceed drives with a vector control closed in motor speed. These advantages are retained when the frequency of change of the disturbing torque is changed from 0 to 5 Hz.

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43

Gallo, D., C. Landi, and N. Pasquino. "Experimental Evaluation of Conducted Emissions by Variable-Speed Drives Under Variable Operating Conditions." IEEE Transactions on Instrumentation and Measurement 57, no. 7 (July 2008): 1350–56. http://dx.doi.org/10.1109/tim.2008.917176.

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44

Vodovozov, Valery, and Zoja Raud. "Predictive control of multi‐pump stations with variable‐speed drives." IET Electric Power Applications 11, no. 5 (May 2017): 911–17. http://dx.doi.org/10.1049/iet-epa.2016.0361.

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45

Bowes, S. R., and J. C. Clare. "Computer-aided design of PWM power-electronic variable-speed drives." IEE Proceedings B Electric Power Applications 135, no. 5 (1988): 240. http://dx.doi.org/10.1049/ip-b.1988.0028.

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46

Avallone, F., C. De Capua, and C. Landi. "Metrological performance improvement for power measurements on variable speed drives." Measurement 21, no. 1-2 (May 1997): 17–24. http://dx.doi.org/10.1016/s0263-2241(97)00034-1.

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47

Alberti, Luigi, Nicola Bianchi, and Silverio Bolognani. "Finite element modeling of induction motor for variable speed drives." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 29, no. 5 (September 14, 2010): 1245–56. http://dx.doi.org/10.1108/03321641011061452.

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48

Yahia, K., S. Zouzou, and F. Benchabane. "Induction motors variable speed drives diagnosis through rotor resistance monitoring." Frontiers in Energy 6, no. 4 (October 11, 2012): 420–26. http://dx.doi.org/10.1007/s11708-012-0192-z.

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49

Malekpour, Mostafa, Rasoul Azizipanah-Abarghooee, Fei Teng, Goran Strbac, and Vladimir Terzija. "Fast Frequency Response From Smart Induction Motor Variable Speed Drives." IEEE Transactions on Power Systems 35, no. 2 (March 2020): 997–1008. http://dx.doi.org/10.1109/tpwrs.2019.2936970.

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50

Dey, D. A. "Guidelines in selecting variable-speed drives from a user's viewpoint." IEEE Transactions on Industry Applications 24, no. 6 (1988): 1101–6. http://dx.doi.org/10.1109/28.17485.

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Journal articles on the topic 'Speed variable drives'

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