Patent ID: 11888357
Assignee: NIDEC MOTOR CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. An electric motor assembly comprising:
a motor including—
a stator assembly,
a rotor assembly comprising a rotor shaft rotatable about a rotor axis,
a housing defining a motor chamber receiving at least a portion of the rotor assembly and the stator assembly, the housing including an endshield rotatably supporting the shaft, and
a sensor target fixed relative to the rotor shaft and thereby oriented in a known position relative to a back electromotive force (BEMF) waveform of the motor;

a rotary position sensor configured to sense the sensor target; and
an alignment plate;
said rotary position sensor being fixed relative to the alignment plate,
said alignment plate being adjustably coupled to the endshield for rotational adjustment that is substantially concentric with the rotor axis, such that the rotary position sensor is adjustable to align a signal waveform produced by the rotary position sensor with the BEMF waveform within a predetermined measurement range,
said alignment plate defining a central opening therethrough,
said central opening having an inner diameter in the range between and including about forty-five (45) millimeters and about fifty-five (55) millimeters.