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

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