Title:
PARALLEL OPERATION POWER SUPPLY
Document Type and Number:
Japanese Patent JP2022018270
Kind Code:
A
Abstract:
To provide a parallel operation power supply that can determine the connection state regardless of the magnitude of a power supply voltage and control the balance of an input voltage of each power control device on the basis of the determination result.SOLUTION: A parallel operation power supply includes a Δ/Y switching circuit unit that is connected to the input side of three power control devices and switches the connection status of the three power control devices to either Δ connection or Y connection, and a Δ/Y determination unit that detects whether R, S, and T terminals of a power supply and a neutral point terminal of the Δ/Y switching circuit unit are connected to the input side, and a current flows between these terminals, determines whether the connection is Δ connection or a Y connection, and outputs the determination result to the three power control devices. The three power control devices set the Y connection control mode to ON when the connection state is determined to be Y connection.SELECTED DRAWING: Figure 1
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Inventors:
HATTORI SHOZO
Application Number:
JP2020121263A
Publication Date:
January 27, 2022
Filing Date:
July 15, 2020
Export Citation:
Assignee:
SANSHA ELECTRIC MFG CO LTD
International Classes:
H02M3/28; H02M7/06
Domestic Patent References:
| JP2006197687A | 2006-07-27 | |||
| JPS57203663A | 1982-12-14 | |||
| JP2000060127A | 2000-02-25 | |||
| JP2013247722A | 2013-12-09 | |||
| JPH114579A | 1999-01-06 |
Attorney, Agent or Firm:
Kaede International Patent Office
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