Motor device
AssigneeJtekt Corporation
InventorGenta SUGIMORI
Life of this patent
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Abstract
Provided is a motor device capable of detecting entry of water into a housing before a control circuit is submerged. A first motor bus bar includes a first U-phase motor bus bar, a first V-phase motor bus bar, and a first W-phase motor bus bar. A first control circuit is connected to the first motor bus bar. The first U-phase motor bus bar, the first V-phase motor bus bar, and the first W-phase motor bus bar are disposed on the lower side with respect to the first control circuit in a gravity direction. The first control circuit detects entry of water into a motor housing of the motor device, based on the status of power supply to the first U-phase motor bus bar, the first V-phase motor bus bar, and the first W-phase motor bus bar.
Claims7
A motor device comprising:
- a motor including a rotary shaft;
- motor bus bars of a plurality of phases that serve as power supply paths to the motor;
- a control circuit that controls power supply to the motor through the motor bus bars;
- and
- a housing that accommodates the motor bus bars and the control circuit;
- wherein
- predetermined motor bus bars of at least two of the plurality of phases are disposed on a lower side with respect to the control circuit in a gravity direction when the motor device is mounted on a mounting target;
- and
- the control circuit includes a water entry detection circuit that detects entry of water into the housing, based on a change in a status of power supply to the predetermined motor bus bars.
Dependencies are inferred from the claim text.