Motor control unit
AssigneeDenso Corporation
InventorYuichiro MURATA
Life of this patent
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Abstract
A motor control unit includes a sensing unit and a driver unit. The sensing unit includes a sensor magnet to rotate in synchronization with a rotation of a rotor included in a motor, and a first sensor element and a second sensor element to convert a signal caused by a rotation of the sensor magnet into a digital signal. The driver unit controls the motor based on output signals of the elements. The sensor magnet includes a first magnetization belt and a second magnetization belt where a plurality of magnetic poles is arranged in a peripheral direction of the rotor. The belts are concentrically disposed to cause arrangements of the magnetic poles to be shifted by a predetermined angle in a peripheral direction. The elements are arranged in a radial direction of the rotor.
Claims10
A motor control unit that controls a motor, comprising:
- a sensing unit including a sensor magnet configured to rotate in synchronization with a rotation of a rotor included in the motor, and a first sensor element and a second sensor element configured to convert a periodical magnetic signal caused by a rotation of the sensor magnet into a digital signal;
- and
- a driver unit configured to control the motor based on output signals of the first sensor element and the second sensor element, wherein
- the sensor magnet includes a first magnetization belt and a second magnetization belt where a plurality of magnetic poles is arranged in a peripheral direction of the rotor, the first magnetization belt and the second magnetization belt being a ring shape,
- the first magnetization belt and the second magnetization belt are concentrically disposed to cause arrangements of the magnetic poles to be shifted from each other by a predetermined angle in a peripheral direction of the first magnetization belt or the second magnetization belt, and
- the first sensor element and the second sensor element are arranged in a radial direction of the rotor.
Dependencies are inferred from the claim text.