Title:
POLYPHASE POWER-SUPPLY DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/117551
Kind Code:
A1
Abstract:
Provided is a polyphase power-supply device that, in association with switching made to a switching frequency, prevents continuation of a state in which output electric power is unbalanced or prevents a state in which imbalance of output electric power is accumulated, to improve operation reliability. This polyphase power-supply device (1) is equipped with: first to N-th DC-DC converters (4-7) that are connected in parallel to each other; and a switching control unit (8) which is configured to perform interleave control on the first to N-th DC-DC converters by supplying first to N-th pulse width modulated (PWM) signals (S1-S4) thereto. The switching frequency for the first PWM signal (S1) is changed (the cycle is changed to T2) at a time point (t11) at which a cycle of the first PWM sign (S1) is to start. The durations (T2-D, T2-2D, T2-3D) of the initial cycle of k-th PWM signals (S2, S3, S4) after the time point of change are set shorter than the durations (T2) of the cycles subsequent to the initial cycle of the k-th PWM signals after the time point of change.
Inventors:
TANAKA HIDEKI
NAKAYASHIKI TAKESHI
NAKAYASHIKI TAKESHI
Application Number:
PCT/JP2020/044689
Publication Date:
June 17, 2021
Filing Date:
December 01, 2020
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
H02M3/00; H02M3/155; H02M3/28
Foreign References:
| JP2015139367A | 2015-07-30 | |||
| JP2008312320A | 2008-12-25 | |||
| JP2010252513A | 2010-11-04 | |||
| JP2010252513A | 2010-11-04 |
Other References:
See also references of EP 4075655A1
Attorney, Agent or Firm:
KAMATA Kenji et al. (JP)
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