Patent ID: 8508961
Filing Date: 2013-08-13
Classification: H02M

Abstract:
1. A power conversion apparatus comprising: two power conversion circuits including a first power conversion circuit and a second power conversion circuit, the first power conversion circuit being connected in parallel to a direct-current load or a single-phase alternating-current load, the first and second power conversion circuits being connected in parallel to a three-phase alternating-current load; two direct-current inductors including a first direct-current inductor and a second direct-current inductor; and a pulse-width-modulation control circuit configured to pulse-width-modulate the two power conversion circuits, wherein the first and second power conversion circuits are current-type inverters and each of the first and second power conversion circuits are a switch including a transistor connected in series with a diode, and the first and second power conversion circuits are connected in reverse polarity to each other via the two direct-current inductors; and the pulse-width-modulation control circuit allows switching between the two power conversion circuits and realizes a bidirectional step-up/down operation between the direct-current load or single-phase alternating-current load and the three-phase alternating-current load.