PWM control apparatus for interphase reactor multiplex inverter
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorShoji Mizoguchi
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Abstract
A PWM control apparatus for an interphase reactor multiplex inverter in which the load current in each phase output from the midpoint of each of the interphase reactors is quickly controlled by feedback control with a signal corresponding to the sum of the output currents of the inverters in the same phase, the voltage command value for each phase of each inverter is corrected with a signal corresponding to the difference between output currents of the inverters in the same phase (proportional to the circulating current), whereby the interphase voltage difference developed across the interphase reactor in each phase is quickly controlled and the circulating current in each phase is controlled to become extremely small.
Claims5
A PWM control apparatus for an interphase reactor multiplex inverter having output terminals of its two inverters connected with each other through interphase reactors so as to provide parallel multiplex three phase output from midpoints of the interphase reactors, said PWM control apparatus comprising:
- (a) generation means of common phase voltage command value for generating phase voltage command value common to both said inverters based on the sum of output currents of said inverters in the same phase;
- (b) generation means of individual phase voltage command value for generating phase voltage command values for individual inverters based on the difference between output currents of said inverters in the same phase;
- and
- (c) firing signal generation means for generating firing signals for said individual inverters based on said individual phase voltage command values and a triangular carrier.
Dependencies are inferred from the claim text.