Power Electronic Handbook P9
Power Electronic Handbook P9
... regenerate power, and high power capability. DC drives and motors from a few horsepower to hundreds of horsepower could beoperated and controlled efficiently in all four quadrants when powered by ... Rajapandian Ayyanar, Amit Kumar Jain Overview • Power Quality Considerations • Passive Harmonic Filters • Active Filtersfor Power Conditioning • Unity Power Factor Rectification 18 Photovoltaic ... Development of FRIENDS • The Advanced Power Electronic Technologies within QCCs • Significance of FRIENDS • Realizationof FRIENDS • Conclusions 20 Unified Power Flow Controllers Ali Feliachi,...
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Power Electronic Handbook P7
... arrangement [1]. However, most power electronics converters are circuits with controllable voltage output. To achieve current control, the voltage of the power electronics converter can be controlled ... compact size, and low cost, switching power supplies continue to gain popularity. Switching power supplies could be as high as three times more efficient than linear power supplies and in some cases ... Modulation Michael Giesselmann Pulse width modulation (PWM) is the method of choice to control modern power electronics circuits. The basic idea is to control the duty cycle of a switch such that a load...
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Power Electronic Handbook P8
... European Space Power Conf. (ESPC), Graz, August 1993, 173–178.12. J. Fernando Silva and Sonia S. Paulo, Fixed frequency sliding mode modulator for current modePWM inverters, in Power Electronics ... used in other applications, notdiscussed here, such as inverters [14, 18], power factor controllers [16], and AC power supplies [17].References1. V. I. Utkin, Sliding Modes and Their Application ... Switched-Mode Power Conversion, Vol. I and II, TESLAco,Pasadena, CA, 1983, 73–89.4. R. Redl and N. Sokal, Current-mode control, five different types, used with the three basic classesof power converters:...
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Power Electronic Handbook P11
... used for constant-speed applications. Withrecent improvements in semiconductor technology and power electronics, the induction machine isseeing wider use in variable-speed applications [6].This ... T. A. Lipo, A new method for rotor time constant tuning in indirect field orientedcontrol, in Power Electronics Spec. Conf., 573–580, 1990.14. D. M. Brod and D. W. Novotny, Current control of ... Williams, A comparison of vector control and direct torquecontrol of an induction machine, in Power Electronics Spec. Conf., 1, 421–426, 2000. © 2002 by CRC Press LLC 11.2 Scalar Induction...
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Power Electronic Handbook P10
... Machines(Brushless DC Machines/Electronics) 10.1 Introduction10.2 Machine Construction Permanent Magnets • Stator Windings 10.3 Motor Characteristics Mathematical Model 10.4 Power Electronic Converter ... with induction motorsin the fractional horsepower range. The former will have better efficiency and better power factor and,therefore, a greater output power for the same frame, because the field ... Acarnley, A.G. Jack, and P.T. Jowett, Power circuits for small permanent-magnet brushless dcdrives, presented at Third International Conference on Power Electronics and Variable Speed Drives,1988,...
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Power Electronic Handbook P13
... motor must havean even number of phases. Also, the power devices must be rated to withstand the full DC supply voltage.The high cost of power semiconductor devices and the need to reduce the ... thethreshold level appropriately. 13.8 ApplicationsThe simple motor structure and inexpensive power electronic requirement have made the SRM anattractive alternative to both AC and DC machines ... the electric power steering andantilock braking systems. The SRM drive is also a strong candidate for the main propulsion drive of anelectric or hybrid vehicle. The wide constant power range...
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Power Electronic Handbook P12
... lpm+Tcog+=TcogTqzzNtqr()TdzzNtqr()sin+cosz∈Z∑=TqzTdzTqzTdz © 2002 by CRC Press LLC The power into the machine is simply the sum of the power into each phase:(12.8)and the power output of the machine is (12.9)where ω rm ... magnet motor drives, IEEE Trans. Ind. Electron.,35(4), 537–541, 1988. 3. B. K. Bose, Ed., Power Electronics and Variable Frequency Drives, IEEE Press, Piscataway, NJ, 1997,chap. 6.4. D. C. ... most significantly influence power converter design are theshape of the back emf, the cogging torque, the magnetic saliency (surface-mount or buried magnets),and the power requirements. Any of...
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Power Electronic Handbook P16
... orderly shutdown of loads. Power Conditioning A UPS provides continuous, regulated power to its load, under all conditions of the utility power line.Unlike other types of power conditioning equipment, ... transformers and some do not. Laura Steffek Best Power John Hecklesmiller Best Power Dave Layden Best Power Brian Young Best Power © 2002 by CRC Press LLC must be run occasionally ... Uninterruptible Power Supplies, Peter Peregrinus, Stevanage, Herts.,U.K.The Institute of Electrical and Electronic Engineers, 1992. IEEE Recommended Practice for Powering andGrounding Sensitive Electronic...
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Power Electronic Handbook P15
... computer disk drives and the like. The power level for these drives usually range below20 to 30 kW; however, drives with slightly lower control quality usually have power levels below 50 to60 kW.Servo ... magnet (PM)DC motors, permanent magnet synchronous motors or, rarely, induction motors. For low -power appli-cations stepping motors can be used, but this type of motor exhibits a considerable...
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Power Electronic Handbook P14
... consumes twice the power of exciting the motor one phase on at a time. Exciting a three-phase motor with two phases on at a timeproduces no additional torque but also consumes twice the power of exciting...
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