Power Electronics and Motor Drives: Advanced and Trends

Chapter 9: Computer Simulation and Digital Control

Simulation

  • VIRTUAL OR SOFTWARE REPRESENTATION OF PHYSICAL CIRCUIT OR SYSTEM

  • NEEDS MODEL DESCRIPTION BY MATHEMATICAL EQUATIONS OR CIRCUIT TOPOLOGY

  • COMPLEX CONVERTER AND CONTROL STRATEGY REQUIRE SIMULATION STUDY PRIOR TO BREADBOARD OR PROTOTYPE DEVELOPMENT

  • VIRTUAL PERFORMANCE TEST SAVES TIME AND MONEY FOR NEWLY DEVELOPED PRODUCT

  • SIMULATION STUDY IS HIGHLY EDUCATIONAL

  • MODERN SIMULATION PROGRAMS ON PC ARE VERY EFFICIENT AND USER-FRIENDLY

  • SIMULATION RESULTS ARE ONLY AS GOOD AS THE MODEL DESCRIPTION

  • REAL-TIME CONTROL AND DIAGNOSTIC PROGRAMS CAN OFTEN BE GENERATED DIRECTLY FROM SIMULATION PROGRAM

  • SIMULATION PROGRAM CAN BE ITERATED FOR OPTIMUM CIRCUIT AND SYSTEM DESIGN

  • NO FEAR OF DAMAGE DUE TO FAULT OR ABNORMAL OPERATION


Figure 9.1: What is simulation? Why simulation?

A newly developed converter or control system should be simulated on a computer prior to breadboard or prototype development, particularly if it is complex. The advantages of simulation studies are summarized here. A simulation study can provide the steady-state, transient, and fault performance of the system and also can help the design of system and its protection. The software emulation and virtual performance tests give the developer a lot of confidence in the product development. The FFT analysis of waveforms can aid in line power quality studies and design. Simulation results are highly educational. If a simulated system behaves abnormally, there is no fear of any damage.


Figure 9.2: Flowchart for prototype ac drive control development with a simulation study.

A flowchart for the steps of advanced drive control development is given in this figure. It is assumed that the...

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