Patent ID: 11870355
Assignee: RENAULT S.A.S.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 12:
13. A power conversion apparatus comprising:
a conversion circuit comprising a switching element and configured to convert DC voltage to AC voltage by switching operation of the switching element;
an isolation transformer comprising an input side and an output side, wherein the input side is connected to the conversion circuit;
a rectifier circuit connected to the output side of the isolation transformer;
a resonance circuit connected to the output side of the isolation transformer and comprising a filter inductor and a junction capacitor; and
a control circuit configured to turn on the switching element in a period when no voltage is applied to the isolation transformer from the conversion circuit and current flowing from the output side of the isolation transformer to the input side of the isolation transformer flows from a low potential side terminal to a high potential side terminal of the switching element via the isolation transformer, wherein:
the conversion circuit comprises a first half-bridge circuit and a second half-bridge circuit,
the first half-bridge circuit comprises a first high potential side switching element and a first low potential side switching element,
the second half-bridge circuit comprises a second high potential side switching element and a second low potential side switching element,
the control circuit is further configured to turn on the first high potential side switching element when the current flows from the isolation transformer to the first high potential side switching element, and turn on the first low potential side switching element when the current flows from the isolation transformer to the first low potential side switching element and
the control circuit is further configured to control a ratio between a time in which voltage is output from the first half-bridge circuit to the isolation transformer and a time in which voltage is output from the second half-bridge circuit to the isolation transformer so that the current is generated.