AC/DC/AC conversion device with reduced switching noise
AssigneePanasonic Intellectual Property Mangement Co., Ltd.
InventorsEiji Takahashi, Kazuyuki Sakiyama
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Abstract
A power conversion device includes a first detection circuit that acquires input information about an AC voltage and/or an alternating current which are inputted to the power conversion device from an AC power supply, a rectifier circuit, an inverter circuit including a switch, and a control circuit that generates a pulse signal for the switch while the control circuit (A) determines, based on the input information, whether the rectifier circuit is in a state in which the rectifier circuit allows switching noise to propagate from the switch to the AC power supply and (B) changes a frequency of the pulse signal with time at least in a period in which the rectifier circuit is in the state.
Claims15
A power conversion device comprising:
- a first detection circuit that acquires input information about at least one of an input alternating-current voltage and an input alternating current which are inputted to the power conversion device from an alternating-current power supply;
- a rectifier circuit that rectifies the input alternating-current voltage to output a pulsating direct-current voltage;
- an inverter circuit that converts the pulsating direct-current voltage into an alternating-current voltage, the inverter circuit including a switch;
- and
- a control circuit that generates a pulse signal for the switch while the control circuit (A) determines, based on the input information, whether the rectifier circuit is in a state in which the rectifier circuit allows switching noise to propagate from the switch to the alternating-current power supply and (B) changes a frequency of the pulse signal with time at least in a first period in which the rectifier circuit is in the state.
Dependencies are inferred from the claim text.