Power Electronics: Converters, Applications, and Design
NED MOW
Preference :
In broad terms, the task of power electronics is to process and control the flow of electric energy by supplying voltages and currents in a form that is optimally suited for user loads. Figure 1-1 shows a power electronic system in a block diagram form. The power input to this powerful processor is usually (but not always) from the electric utility at a line frequency of 60 or 50 Hz, single phase or three phases. The phase angle between the input voltage and the current depends on the topology and the control of the power processor. The processed output (voltage, current, frequency, and the number of phases) is as desired by the load. If the power processor's output can be regarded as a voltage source, the output current and the phase angle relationship between the output voltage and the current depend on the load characteristic. Normally, a feedback controller compares the output of the power processor unit with a desired (or a reference) value, and the error between the two is minimized by the controller. The power flow through such systems may be reversible, thus interchanging the roles of the input and the output.
- PART 1 INTRODUCTION
- PART 2 GENERIC POWER ELECTRONIC CIRCUITS
- PART 3 POWER SUPPLY APPLICATIONS
- PART 4 MOTOR DRIVE APPLICATIONS
- PART 5 OTHER APPLICATIONS
- PART 6 SEMICONDUCTOR DEVICES
- PART 7 PRACTICAL CONVERTER DESIGN CONSIDERATIONS
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