Abstract
The factors which influence the current response to a current command for a normal autosequentially commutated current link inverter (ASCI) are discussed. A simple new method of notching the output current waveform for the ASCI is presented, which is used to control the ac output current from the ASCI. To demonstrate the improvement in the current response of the ASCI with notching (or NASCI), two typical classes of control systems of ac induction machine drives are considered. A performance comparison is made between ASCI and NASCI induction machine drives. Analysis and analog computer simulation results show that substantial improvement in dynamic response is achieved when the notching is utilized.
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