Title:
POWER CONVERTER
Document Type and Number:
Japanese Patent JP2022139136
Kind Code:
A
Abstract:
To suppress an erroneous gate ignition of a semiconductor device that configures a class-D amplifier in a power converter that performs a phase shift control, and enable the phase shift control even when a gate phase difference θ is small.SOLUTION: In a power converter, a plurality of class-D amplifiers are arranged in parallel. An ON/OFF operation of a switching element for a leading leg and a lagging leg of each class-D amplifier is performed by a phase shift control for displacing phases by a gate phase difference θ. In the phase shift control, an auxiliary current is supplied to the class-D amplifier on the basis of a voltage difference between an output terminal of an upper side class-D amplifier and an output terminal of a lower side class-D amplifier. As the auxiliary current, a current flowing between a drain and a source of the switching elements is assisted, which suppresses the generation of a displacement voltage dv/dt when the switching element switches from OFF to ON, and a displacement current di/dt generated by the displacement voltage on a modulated wave, and prevents the switching element in a state in which the other one of the legs is OFF from erroneously being ignited.SELECTED DRAWING: Figure 1
Inventors:
MIYAZAKI KOICHI
KUNITAMA HIROSHI
KUNITAMA HIROSHI
Application Number:
JP2021039387A
Publication Date:
September 26, 2022
Filing Date:
March 11, 2021
Export Citation:
Assignee:
KYOSAN ELECTRIC MFG
International Classes:
H02M3/28
Domestic Patent References:
| JP2016001980A | 2016-01-07 | |||
| JP2017046536A | 2017-03-02 | |||
| JP2020167881A | 2020-10-08 | |||
| JP2020202644A | 2020-12-17 | |||
| JP2018182921A | 2018-11-15 |
Foreign References:
| EP2600512A2 | 2013-06-05 |
Attorney, Agent or Firm:
Aiwa Patent Business Corporation