Title:
VOLTAGE SWITCHING TYPE DIRECT-CURRENT POWER SUPPLY
Document Type and Number:
WIPO Patent Application WO/2019/180912
Kind Code:
A1
Abstract:
Provided is a voltage switching type direct-current power supply which is capable of reducing loss. This direct-current power supply has a connection switching circuit which can select a serial connection or a parallel connection of two or more charge devices. The direct-current power supply applies a two-level or three-level DC link voltage to an inverter for variable speed motor driving. The connection switching circuit, which has an inductor, performs a chopper operation in order to avoid sudden changes in the DC link voltage and in order to reduce voltage differences among the plurality of charge devices. In this chopper operation, series transistors or parallel transistors of the connection switching circuit are switched at a prescribed PWM carrier frequency.
Inventors:
TANAKA SHOUICHI (JP)
Application Number:
PCT/JP2018/011684
Publication Date:
September 26, 2019
Filing Date:
March 23, 2018
Export Citation:
Assignee:
TANAKA SHOUICHI (JP)
International Classes:
B60L11/18
Foreign References:
| JP2010178421A | 2010-08-12 | |||
| JP2008067432A | 2008-03-21 | |||
| JP2017118732A | 2017-06-29 | |||
| JP2010193589A | 2010-09-02 | |||
| JP2015164385A | 2015-09-10 | |||
| JP2014064416A | 2014-04-10 |
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