| Summary: | 碩士 === 國立交通大學 === 電控工程研究所 === 101 === This dissertation studies the control system of Current-Source-Inverter-fed PMSM. The Buck DC-DC current controller is used as an ideal current source on the DC side of Current-Source-Inverter. The parallel capacitors on the AC side of Current-Source- Inverter constitute LC low pass filters with the inductive coils of PMSM, and supply phase currents for PMSM in some switching states of CSI. We use SVPWM to generate the switch signal, and the method we use to set Dead-Time can ensure minimum switching transient and reduce the switching energy consumption. Besides, the Zero-Sequence- Injection technology of SVPWM can extend the range of linear modulation, and improve the utilization of DC bus. The principle and method of SVPWM on Current-Source- Inverter is analyzed in detail. In control strategy, we build the equivalent model of the DC side and the AC side of Current-Source-Inverter separately, and improve the control method to realize the control of Current-Source-Inverter-Fed PMSM. Furthermore, we deduce the design formulas of the parallel capacitors. And the simulation and experimental results are also provided to demonstrate the validity of this system both under steady state and load switching state.
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