US 11,671,032 B2
Control method for controlling resonance power converter, and resonance power converter
Kousuke Saito, Kanagawa (JP); Toshihiro Kai, Kanagawa (JP); Shigeharu Yamagami, Kanagawa (JP); and Keisuke Inoue, Kanagawa (JP)
Assigned to NISSAN MOTOR CO., LTD., Yokohama (JP)
Appl. No. 17/48,279
Filed by NISSAN MOTOR CO., LTD., Yokohama (JP)
PCT Filed Apr. 20, 2018, PCT No. PCT/IB2018/000567
§ 371(c)(1), (2) Date Oct. 16, 2020,
PCT Pub. No. WO2019/202352, PCT Pub. Date Oct. 24, 2019.
Prior Publication US 2021/0044218 A1, Feb. 11, 2021
Int. Cl. H02M 7/539 (2006.01); H02M 7/5395 (2006.01); G01R 19/165 (2006.01); H02M 1/32 (2007.01); H02M 1/00 (2006.01); H02M 7/48 (2007.01)
CPC H02M 7/5395 (2013.01) [G01R 19/16538 (2013.01); H02M 1/32 (2013.01); H02M 1/0009 (2021.05); H02M 1/0058 (2021.05); H02M 1/327 (2021.05); H02M 7/4818 (2021.05)] 5 Claims
OG exemplary drawing
 
1. A control method of controlling a resonance type power conversion device including a voltage resonance circuit, the method comprising:
providing the voltage resonance circuit, which comprises:
a choke coil connected to an input power supply,
a first switching element connected to the choke coil,
a capacitor connected in parallel to the first switching element,
a resonance circuit connected between a connection point and an output terminal, the connection point being a point at which the choke coil and the first switching element are connected, and
a parallel circuit connected in parallel to the first switching element, wherein:
the parallel circuit includes a diode connected between a lower potential side of the first switching element and the connection point, and
a conductive direction of the diode is a direction in which a forward direction current flows from a lower potential side of the first switching element to the connection point;
detecting, by a sensor, a polarity of a diode current flowing to the diode in a state in which the first switching element is turned on at a timing of a predetermined period;
when the forward direction current flows to the diode, making a timing for turning on the first switching element later than the timing of the predetermined period; and
when the diode current is not flowing, making the timing for turning on the first switching element earlier than the timing of the predetermined period.