Power Electronic Control

... the required rms value of the fundamental harmonic of the output phase to neutral voltage of the AC-AC voltage controller Induction machine Fig 6.5: Speed control of an induction machine by stator ... power supply source for V/f control of induction motors The second one, current source inverter (CSI), is beyond the scope of interest here Principle of operation of...

Ngày tải lên: 11/07/2014, 05:20

... nửa chu kỳ điện áp đồng Điện áp điều khiển đưa vào chân 11, V11, so sánh với cưa khâu so sánh (Control Comparator), thời điểm hai giá trị xác định góc điều khiển α đưa đến khâu Logic để sử lý

Ngày tải lên: 23/07/2015, 15:24

... over -compensation make power losses on the network increase Thus, it is necessarily to control parameters and switching compensation devices according to the changing of loads The controlling of compensation ... compensation devices could be implemented by power electronics structures controlling the firing angle of thyristor In the next section, we introdu...

Ngày tải lên: 05/03/2014, 14:20

... INVESTIGATIONS INTO DESIGN AND CONTROL OF POWER ELECTRONIC SYSTEMS FOR FUTURE MICROPROCESSOR POWER SUPPLIES Ravinder Pal Singh (B.Tech(Hons), IIT Kharagpur, India) A THESIS SUBMITTED FOR ... requirements, the design of next generation VRMs need a thorough understanding of the performance and design trade-os The supply voltage of the microprocessor w...

Ngày tải lên: 11/09/2015, 10:06

... primary control PLL algorithm was used as a current measurement The control parameters were adjusted V CONCLUSION The characteristics of a new power flow controller, the Magnetic Energy Recovery Switch (MERS) , ... "Application of magnetic energy recovery switch for power factor correction," IPEC 2005 [11] J Wiik, T Isobe, T Takaku, T Kitahara, and R Shimada, "Applic...

Ngày tải lên: 15/10/2013, 16:12

Ngày tải lên: 15/10/2013, 16:37

... compensation, IEEE Trans Power Electron., PE-1, 21–31, January 1986 D W Hart, Introduction to Power Electronics, Prentice-Hall, Englewood Cliffs, NJ, 1997, 194 P T Krein, Elements of Power Electronics, Oxford ... loop arrangement [1] However, most power electronics converters are circuits with controllable voltage output To achieve current control, the voltage of the power electroni...

Ngày tải lên: 17/10/2013, 11:15

... regenerate power, and high power capability DC drives and motors from a few horsepower to hundreds of horsepower could be operated and controlled efficiently in all four quadrants when powered by ... horsepower were successfully applied to DC motors using permanent magnet fields The power dissipated by the transistor when gated-on is minimal and the power while gated-off is zero However,...

Ngày tải lên: 19/10/2013, 18:15

... Trans Power Electron., 10(3), 302–309, 1995 10 P Mattavelli, L Rossetto, G Spiazzi, and P Tenti, General-purpose sliding-mode controller for DC/DC converter applications, in Proc of IEEE Power Electronics ... 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 mode PWM inverters, in Power...

Ngày tải lên: 19/10/2013, 18:15

... constant equal to as it is in (11.10), the result is the power invariant transformation By using this transformation, the calculated power in the abc coordinate system is equal to that computed ... T A Lipo, A new method for rotor time constant tuning in indirect field oriented control, in Power Electronics Spec Conf., 573–580, 1990 14 D M Brod and D W Novotny, Current control of VSI-PWM...

Ngày tải lên: 23/10/2013, 16:15

... P.P Acarnley, A.G Jack, and P.T Jowett, Power circuits for small permanent-magnet brushless dc drives, presented at Third International Conference on Power Electronics and Variable Speed Drives, ... the number of power devices, but ensures complete electrical isolation between phases so that remedial strategies can be adopted to continue operation even with the failure of a power devi...

Ngày tải lên: 23/10/2013, 16:15

... ampere However, the maximum speed at constant power is not limited by the fixed magnet flux as in the PM machine, and, hence, an extended constant power region of operation is possible in SRMs ... conversion process in an SRM can be evaluated using the power balance relationship Multiplying Eq (13.4) by i on both sides, the instantaneous input power can be expressed as di dL d 2 dL dL 2...

Ngày tải lên: 27/10/2013, 23:15