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

Claim 2:
3. The polyphase power-supply device according to claim 1, wherein the switching controller includes:
a pulse-width control circuit configured to supply the PWM signals of the first to N-th phases to switching elements of the plurality of DC-DC converters of the first to N-th phases, the PWM signals controlling turning on and off of the switching elements;
a frequency control circuit configured to control the switching frequency of the PWM signals;
a spread spectrum circuit configured to change the switching frequency;
a detection circuit configured to detect a voltage at the output terminal; and
a calculation circuit configured to perform an arithmetic operation based on information detected by the detection circuit and determine a duty ratio of the PWM signals according to information on a result of the arithmetic operation, the arithmetic operation including comparison of an output voltage, an output current, or an output electric power.