Title:
POWER SUPPLY DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/079593
Kind Code:
A1
Abstract:
Provided is a power supply device in which the output voltages of unit power converters can be controlled to be substantially constant even when the loads of the respective unit power converters are different from each other. The power supply device in which a plurality of unit power converters are connected in series with an AC system and power is supplied from the unit power converters to load devices is characterized by being provided with a control device for obtaining the degree of load imbalance among the load powers of the load devices and controlling the AC system side voltages of the unit power converters to operate by reducing the power factor of the AC system when the degree of load imbalance increases.
Inventors:
GU MINGLEI (JP)
KANOUDA AKIHIKO (JP)
KANOUDA AKIHIKO (JP)
Application Number:
PCT/JP2020/030947
Publication Date:
April 29, 2021
Filing Date:
August 17, 2020
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
H02M3/28; H02M7/12
Domestic Patent References:
| WO2019071331A1 | 2019-04-18 |
Foreign References:
| JP2018038228A | 2018-03-08 | |||
| JP2018046601A | 2018-03-22 |
Other References:
M. MOOSAVIG. FARIVARH. IMAN-EINIS. M. SHEKARABI: "A voltage balancing strategy with extended operating region for cascaded H-bridge converters", IEEE TRANSACTIONS ON POWER ELECTRONICS, vol. 29, no. 9, September 2014 (2014-09-01), pages 5044 - 5053, XP011546745, DOI: 10.1109/TPEL.2013.2286270
See also references of EP 4050784A4
See also references of EP 4050784A4
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
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