Patent ID: 7577007
Filing Date: 2009-08-18
Classification: H02J,H02M,Y02E

Abstract:
1. A power converting apparatus comprising: a single-phase multiplex converter connected to a load via a reactor to provide electric power to the load, said single-phase multiplex converter including a first single-phase inverter to which a maximum DC source voltage is supplied and at least one second single-phase inverter, said first single-phase inverter outputting voltage pulses at a rate of one pulse per half period of a reference AC voltage, said first and at least one second single-phase inverters being connected in series at AC output sides of said single-phase inverters, wherein said first and at least one second single-phase inverters convert DC power fed from a DC power supply into AC power; and a control unit for controlling said single-phase multiplex converter to produce an output voltage having a quasi-sinusoidal waveform simulated by the sum of output voltages of respective single-phase inverters, said control unit including a current controller for regulating an output current of said single-phase multiplex converter to follow a target current which is determined in accordance with the load, wherein