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Event-driven current control structure for a three phase inverter
Polič, Aleš ; Jezernik, Karel
This paper discusses the functionality of a three-phase inverter from a discrete-event point of view. A recently developed vector-matrix recursive approach for the modeling of discrete event systems ...is applied for the design of a new, event-driven current control principle for a current controlled three phase inverter. The proposed event-driven current controller integrates traditionally separated current controller, and modulator. Transistor switching patterns are evaluated directly from the phase current errors and the voltage sector, and sequential switching among the transistor patterns is introduced to reduce switching frequency. Jn order to describe total functionality of a three phase inverter, the proposed modeling approach is further used for the design of steering and protection functions. The designed current controlled inverter is used for the speedlcurrent control of a permanent magnet synchronous mac hine. The presented experiment shows that the introduced recursive matrix based approach for the modeling of discrete event systems o.ffers a simple mapping procedure for rapid implementation of the designed control algorithms on the FPGA platform.
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