Patent ID: 9602008
Date: 2017-03-21
CPC Classifications: H02M

Claim:
1. A power conversion apparatus, comprising: a direct current power supply; a choke coil having an input terminal connected to a positive terminal of the direct current power supply; a first coil having a center tap, with both ends connected to a predetermined connecting point, one end via a first switching element and the other end via a second switching element; a second coil magnetically coupled to the first coil; a capacitive load connected to the second coil via a rectifying circuit; a capacitive load voltage detecting means detecting a capacitive load voltage as a voltage of the capacitive load; and a pulse generation unit transmitting one of an ON signal for instructing state transition to ON, and an OFF signal for instructing state transition to OFF, to the first and second switching elements, wherein the center tap is connected to a negative terminal of the direct current power supply and the predetermined connecting point is connected to an output terminal of the choke coil, when the capacitive load voltage is not larger than a first predetermined value, a first mode is defined as a control under which a control of turning ON one of the first and second switching elements and turning OFF the other switching element is alternated with a control of turning OFF both the first and second switching elements, and when the capacitive load voltage is larger than the first predetermined value, a third mode is defined as a control under which a control of turning ON one of the first and second switching elements and turning OFF the other switching element is alternated with a control of turning ON both the first and second switching elements.