Patent ID: 11967904
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 5:
6. The polyphase power-supply device according to claim 3, wherein the switching controller is configured to:
change a timing of switching from an on-duty duration to an off-duty duration of the PWM signals of the second phase to the N-th phase appearing firstly after the spread spectrum circuit supplies a frequency change signal, the timing being changed sequentially by the time D for the PWM signal of the second phase to by the product of D and (N−1) for the PWM signal of the N-th phase; and
change and supply the first cycles of the PWM signals of the second phase to the N-th phase appearing firstly after the switching frequency is changed, the first cycles being changed sequentially by the time D for the PWM signal of the second phase to by the product of D and (N−1) for the PWM signal of the N-th phase.