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US 7,888,833 B2Granted
Molded motor
AssigneeNidec Shibaura Corporation
InventorTakeshi Okada
Life of this patent
Estimating the term…
Abstract
An inner rotor type molded motor controlled by pulse width modulation using an inverter circuit includes a pair of electrically conductive brackets attached to a load-side portion and an anti-load-side portion of a motor frame. An electrically conductive tape is attached on the outside of the motor frame to extend between the brackets, thereby short-circuiting the brackets to each other. In this manner, electrical erosion in the molded motor can be prevented.
Claims9
A motor including a center axis, the motor comprising:
- a stator including a stator core and a coil disposed around at least a portion of the stator core;
- a molded motor frame made of insulating resin and defining an outer circumferential surface of the motor;
- a rotor disposed on a center-axis side of the stator and including a shaft rotatable about the center axis;
- electrically conductive brackets disposed on both sides of the molded motor frame;
- bearings disposed on the brackets, respectively, and supporting the shaft of the rotor in a rotatable manner;
- an electrically conductive member electrically connected to the brackets to short-circuit the brackets to each other;
- and
- the electrically conductive member is disposed to extend along an outer circumferential surface of the molded motor frame.
5 more elements
Dependencies are inferred from the claim text.