Motor rotation detection device
A motor rotation detection device is disclosed. The motor rotation detection device according to one embodiment of the present invention, which is coupled to a rotating shaft of a motor to transmit a rotation position of a motor to a motor position sensor (MPS) through magnetic flux in a non-contact manner, includes: a spacer that is disposed so that one end thereof is in contact with one end of the rotating shaft; a sensor magnet that is disposed on the other end of the spacer and generates magnetic flux; and a case that is coupled to the rotating shaft and provides a fixing force to fix the sensor magnet and the spacer to the rotating shaft.
1. A motor rotation detection device which is coupled to a rotating shaft of a motor to transmit a rotation position of the motor to a motor position sensor (MPS) through magnetic flux in a non-contact manner, the device comprising:
a spacer which is disposed so that one end of the spacer is in contact with one end of the rotating shaft;
a sensor magnet which is disposed on the other end of the spacer and generates magnetic flux; and
a case which is coupled to the rotating shaft and provides a fixing force so that the sensor magnet and the spacer are fixed to the rotating shaft,
wherein the spacer includes a protrusion protruding from one end of the spacer, and a groove, into which the protrusion of the space is inserted, is formed at one end of the rotating shaft.
2. The device of claim 1 , wherein the spacer is made of a non-magnetic material.
3. The device of claim 1 , wherein the spacer is made of an elastic material.
4. The device of claim 1 , wherein the sensor magnet is disposed to cover an entirety of the other end of the spacer.
5. A motor rotation detection device which is coupled to a rotating shaft of a motor to transmit a rotation position of to a motor position sensor (MPS) through magnetic flux in a non-contact manner, the device comprising:
a spacer which is disposed so that one end of the space is in contact with one end of the rotating shaft;
a sensor magnet which is disposed on the other end of the spacer and generates magnetic flux; and
a case which is coupled to the rotating shaft and provides a fixing force so that the sensor magnet and the spacer are fixed to the rotating shaft,
wherein a guide protrusion is formed at one of the other end of the spacer and a contact surface of the sensor magnet that is in contact with the other end of the spacer, and a guide groove, into which the guide protrusion is inserted, is formed at the other end of the sensor magnet.
6. The device of claim 1 , wherein the case is made of a non-magnetic metal material.
7. The device of claim 1 , wherein the case includes a head part which covers one surface of the sensor magnet and a body part which extends downward from the head part and is formed to surround the sensor magnet, the spacer, and a part of the rotating shaft.
8. The device of claim 7 , wherein the head part includes a window that exposes at least a part of the sensor magnet.
9. A motor rotating detection device which is coupled to a rotating shaft of a motor to transmit a rotation position of the motor to a motor position sensor (MPS) through magnetic flux in a non-contact manner, the device comprising:
a spacer which is disposed so that one end of the spacer is in contact with one end of the rotating shaft;
a sensor magnet which is disposed on the other end of the spacer and generates magnetic flux; and
a case which is coupled to the rotating shaft and provides a fixing force so that the sensor magnet and the spacer are fixed to the rotating shaft,
wherein:
the case includes a head part which covers one surface of the sensor magnet and a body part which extends downward from the head part and is formed to surround the sensor magnet, the spacer, and a part of the rotating shaft;
the rotating shaft includes a groove formed in a portion, which is in contact with an inner circumferential surface of the body part, of an outer circumferential surface of the rotating shaft; and
the body part includes a protrusion which is formed on a portion, which is in contact with the groove, of an inner circumferential surface of the body part and is formed to be insertion-fixable to the groove.