CPC H02P 21/34 (2016.02) [H02P 21/20 (2016.02); H02P 21/22 (2016.02); H02P 2207/01 (2013.01)] | 16 Claims |
1. A method of operating a reduced voltage soft starter (RVSS) that drives a motor, the method comprising:
sensing a line voltage provided to the RVSS to produce a first voltage signal;
sensing a current of the motor to generate a current signal;
transforming the first voltage signal according to an ABC-dq0 transformation at a first angle to generate a component signal;
scaling the component signal;
transforming the scaled component signal according to a dq0-ABC transformation at a second angle to generate load-side line-to-neutral voltage signals for respective phases; and
processing the load-side line-to-neutral voltage signals responsive to the current signal to compensate for switching by the RVSS.
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