Control in Power Electronics: Selected Problems (Academic by Marian P. Kazmierkowski, Ramu Krishnan, Frede Blaabjerg, J.

By Marian P. Kazmierkowski, Ramu Krishnan, Frede Blaabjerg, J. D. Irwin

The authors have been initially introduced jointly to proportion learn and functions in the course of the foreign Danfoss Professor Programme at Aalborg college in Denmark.Personal desktops will be unwieldy and inefficient with out energy digital dc provides. moveable conversation units and pcs may even be impractical. High-performance lights structures, motor controls, and quite a lot of business controls depend upon strength electronics. within the close to destiny we will be able to count on robust development in automobile functions, dc strength provides for communique structures, transportable functions, and high-end converters. we're imminent a time while all electricity could be processed and regulated via strength electronics someplace within the course from iteration to finish use. the main up to date details to be had is gifted within the textWritten via an international popular chief within the box

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Additional resources for Control in Power Electronics: Selected Problems (Academic Press Series in Engineering)

Sample text

The resonant circuit stores reactive power, and in order to keep resonant circuit losses low, the level of reactive power must be kept low. 4. Finally, the circuit that controls the resonance should be capable of operating the converter at dc link voltages as high as 500 V. Two methods are presented. The first is known as the short circuit method. The second is proposed based on the experience of working with the first described method. It is a bit more complex to describe theoretically than the short circuit method and it apparently requires a few extra components.

43 Step-up chopper. 44 Output voltage and current waveforms in a stepup chopper (D ¼ 0:75). 45 Single-phase, half-bridge, voltage-source inverter. the output voltage of the inverter is given by   1 vo ¼ V i a À 2 ð1:20Þ where Vi denotes the dc input voltage. Only two values of vo are possible: Vi =2 and ÀVi =2. To prevent the so-called shot-through, that is, a short circuit when one switch is turned on and the other has not yet turned off completely, the turn-on is delayed by a few microseconds, called a dead, or blanking, time.

2. The resonance must be error tolerant, meaning that if an error occurs and the resonance is prevented from completing, the resonant circuit control must be able to restore the resonance in the next resonant cycle. It is not acceptable if the whole converter stops because of electrical noise. 3. The resonant circuit stores reactive power, and in order to keep resonant circuit losses low, the level of reactive power must be kept low. 4. Finally, the circuit that controls the resonance should be capable of operating the converter at dc link voltages as high as 500 V.

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