Control device, control method, and power supply device
AssigneeFujitsu Limited
InventorsTomotake SASAKI, Tsugito MARUYAMA, Yu YONEZAWA, Yoshiyasu NAKASHIMA
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Abstract
A control device includes: a power supply circuit that controls output voltage using a switching element; a generation unit that generates a reference signal on the basis of the output voltage from the power supply circuit; a PWM unit that generates a PWM signal that is output to the switching element by comparing the reference signal with a carrier signal; and a switching unit that switches a frequency of the carrier signal by changing amplitude of the carrier signal, wherein the generation unit generates the reference signal on the basis of the frequency.
Claims20
A control device comprising:
- a power supply circuit that controls output voltage using a switching element;
- a generation unit that generates a reference signal on a basis of the output voltage from the power supply circuit;
- a pulse width modulation unit that generates a pulse width modulation signal that is output to the switching element by comparing the reference signal with a carrier signal;
- and
- a switching unit that switches a frequency of the carrier signal by changing amplitude of the carrier signal, wherein
- the generation unit generates the reference signal on a basis of the frequency of the carrier signal.
A power supply device comprising:
- a power supply circuit that controls output voltage using a switching element;
- a generation unit that generates a reference signal on a basis of the output voltage from the power supply circuit;
- a pulse width modulation unit that generates a pulse width modulation signal that is output to the switching element by comparing the reference signal with a carrier signal;
- and
- a switching unit that switches a frequency of the carrier signal by changing amplitude of the carrier signal, wherein
- the generation unit includes a control circuit that generates the reference signal on a basis of the frequency of the carrier signal.
A control method comprising:
- generating a reference signal on a basis of output voltage of a power supply circuit that controls the output voltage using a switching element;
- generating a pulse width modulation signal that is output to the switching element by comparing the reference signal with a carrier signal;
- and
- switching a frequency of the carrier signal by changing amplitude of the carrier signal, wherein
- in the generating of the reference signal, the reference signal is generated on a basis of the frequency of the carrier signal.
Dependencies are inferred from the claim text.