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US 2015/0084564 A1Published application
Control device of fan motor
AssigneeSanyo Denki Co., Ltd.
InventorsTakahisa TODA, Takashi KAISE, Jiro WATANABE
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Abstract
A control device of a fan motor includes: a voltage sensor that detects a voltage applied to a fan motor; a switching portion that selectively connects to each of coils of the fan motor and a rectifier circuit; and a switching control portion that reduces a duty ratio of a driving pulse applied to the switching portion if the voltage detected by the voltage sensor exceeds a threshold.
Claims8
A control device of a fan motor comprising:
- a voltage sensor that detects a voltage applied to a fan motor;
- a switching portion that selectively connects to each of coils of the fan motor and a power supply;
- and
- a switching control portion that reduces a duty ratio of a driving pulse applied to the switching portion if the voltage detected by the voltage sensor exceeds a threshold.
1 more element
Dependencies are inferred from the claim text.