Electric rotating machine

Abstract

The present invention leads to that the rotating position detector is not effected by the outer magnetic field, reduces the interference included in the output of the rotating position detector and prevents the false action of the rotating position detector. The rotating electric machine comprises the following components: a stator (2); a rotor (1) which has a rotation axis (4) and rotates axially with the stator (2); end caps (5) and (6) which support and fix the stator (2) and at the same time support the rotation axis (4) to facilitate the rotation; a rotating position detecting part (11) which is arranged on the rotation axis (4) at the side opposite to the load and detects the rotating position of the rotor (1); and a power part (18) which is arranged at the external circumferential side of the rotating position detecting part (11) and is provided with a switching element (9). In the rotating electric motor the rotating position detecting part (11) is arranged with a shielding component (12) which covers the external circumference to shield the magnetic field generated by the switching element (9).

Description

technical field [0001] The present invention relates to a rotating electrical machine such as a motor, and more particularly to a small rotating electrical machine provided in a small space for use in a vehicle or the like, having a rotational position detection unit and a switching element unit for controlling current of the rotating electrical machine. Background technique [0002] For example, in the control-device-integrated motor disclosed in Patent Document 1, the control-device housing is fixed on the end cover or frame on the opposite side of the motor from the load side, and the cooling fan is installed on the sum of the rotating shaft penetrating through the control-device housing. on the end opposite the load side. An inverter circuit and a rotor position detector arranged on an inner peripheral side of the inverter circuit are installed in the controller case. [0003] [Patent Document 1] Japanese Unexamined Patent Publication No. 11-27903 (pp. 4-5, figure 2 ) ...

AI Technical Summary

Problems solved by technology

[0005] In the control-device-integrated motor described in Patent Document 1, since the inverter circuit portion including the switching elements and the rotational position detector of the rotor are arranged close to each other, the disturbance caused by the above-mentioned sudden change in the magnetic field interferes with the rotational position detector. The output superimposition, resulting in the problem of false detection of the rotor position

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