Advanced Power Electronics Converters: PWM Converters by Euzeli dos Santos, Edison R. da Silva

By Euzeli dos Santos, Edison R. da Silva

This e-book covers energy electronics, intensive, via featuring the fundamental ideas and alertness information, which might be used either as a textbook and reference book.

• Introduces a brand new technique to current energy electronics converters known as energy Blocks Geometry (PBG)
• Applicable for classes targeting strength electronics, energy electronics converters, and complex energy converters
• Offers a finished set of simulation effects to aid comprehend the circuits offered in the course of the book

 

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Extra info for Advanced Power Electronics Converters: PWM Converters Processing AC Voltages

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19 requires two power switches with UniC and UniV characteristics. Solution As the output voltage is dc, the load current is also dc, which leads to a dc current for IL . During the TS 1, the switch Q will carry this unidirectional type of current (UniC) and during the TS 2 the diode will carry IL . When both 30 CHAPTER 2 POWER SWITCHES AND OVERVIEW OF BASIC POWER CONVERTERS switches are turned off their current will be zero. In terms of the voltage applied to those devices, it is also UniV, as the voltage will be either zero or Vdc for Q and either zero or −Vdc for D.

In conduction, it approximates to the SCR characteristics. Its blocking is obtained through the turn-off gate. However, even though it reached values of 2 and 3 kV and hundreds of amperes, its acceptance by the market is still undefined at the moment. Its symbol is given in Fig. 12(a). The IGCT The IGCT was introduced in 1997 and it is a high voltage, high power, asymmetric blocking device, with a structure very similar to a GTO thyristor. As it is designed with a monolithically integrated antiparallel diode, it is a BidC/UniV type of device.

The output voltage waveform of the three-phase bridge is similar to that of the six-phase half-bridge. Vo = PWM Control A three-phase PWM converter with bidirectional power flow capability, sinusoidal grid current, and power factor control is presented in Fig. 42. Each phase can employ the boost principle so that the output voltage is higher than the amplitude of the input voltage. This topology is discussed in detail in Chapter 9. 38 Single split-phase rectifier with a free-wheeling diode: (a) power circuit and (b) main waveforms.

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