Patent ID: 8995152
Filing Date: 2015-03-31
Classification: H02M

Abstract:
1. An inverter circuit comprising: a first direct current power source having a positive voltage and a second direct current power source having a negative voltage, connected together in series via a connection point, the connection point being a neutral terminal, a single phase alternating current power source having an alternating current source voltage, one end of the single phase alternating current power source being connected to the neutral terminal, a first alternating current output terminal and a second alternating current output terminal, the second alternating current output terminal connected to the neutral terminal, the inverter circuit having as input four levels of voltage, being a null voltage having a potential of the neutral terminal, the positive voltage, the negative voltage, and the alternating current source voltage wherein: in a steady-state mode, supplying a predetermined voltage to a load as an alternating current output voltage, first and second voltages selected from among the four levels of voltage are output in a complementary way between the first alternating current output terminal and the second alternating current output terminal in each of control periods synchronous and asynchronous with a cycle of the alternating current output voltage; and in a start-up mode, raising the alternating current output voltage from zero to the predetermined voltage, taking, of the four levels of voltage, the alternating current source voltage as the first voltage and the null voltage as the second voltage, the first and second voltages being output in a complementary way between the first alternating current output terminal and the second alternating current output terminal in each of the control periods.