Rotary motor

Abstract

The invention provides a rotary motor provided with a stator, a rotor and a sensor unit. A protrusion (64) is disposed on the sensor unit (16); the protrusion (64) accommodates a sensor element (61) for detecting a rotating position of the rotor (14); the protrusion (64) is clamped between front end parts (23) of adjacent two salient poles (22) of the stator (12) in respect to a peripheral direction; and the protrusion and the front end parts (23) of the salient poles (22) are inosculated with each other. Therefore, relative movement of the protrusion of the sensor unit and the front end parts of the salient poles along a radial outer side and inner side is restricted well.

Description

Technical field [0001] The present invention relates to a rotating electric machine, and particularly relates to a rotating electric machine configured to be able to operate as a motor and / or a generator. Background technique [0002] Conventionally, a rotating electric machine with a brushless structure configured to be able to operate as a motor and / or a generator has been used. [0003] Generally, a rotating electric machine having a brushless structure is provided with a rotation detection sensor, and the rotation detection sensor detects the rotation position (rotation phase) of the rotor and performs rotation control of the rotor. A structure having a magnetic detection element such as a Hall element is widely used as the rotation detection sensor. [0004] As an example of a rotation detection sensor having the above-mentioned magnetic detection element, Japanese Patent Laid-Open No. 2010-119249 discloses that the magnetic detection element is held between a pair of adjacent ...

AI Technical Summary

Problems solved by technology

[0005] In the rotation detection sensor having the above-mentioned structure disclosed in JP-A-2010-119249, vibration or displacement of the sensor holding part in the radial direction due to vibration from the outside and differences in components during assembly, etc., may cause Failures such as noise in the detection signal, error in the detection result, and interference between the sensor holder and the rotor occur.

In particular, when such a rotating electrical machine is attached to the crank case (crank case) of an internal combustion engine, the vibration accompanying the operation of the engine (engine) propagates to the rotating electrical machine, and the possibility of occurrence of the above-mentioned failure is significant.

Therefore, in order to improve the mechanical strength and determine the position of the sensor, there is a problem that the cost of the device increases.

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