Motors with resolvers and grease-replaceable motors with resolvers

Abstract

The purpose of the present invention is to provide a grease exchange type motor equipped with a resolver as a rotation detector, such that despite the motor body being formed from a magnetic material that allows leaked magnetic flux to pass therethrough, it is possible to accurately detect rotation position and speed without being influenced by the magnetic flux leaked from the motor, and such that consideration is given so that the size of the motor does not become large. The material of an end bracket (1) is a magnetic body, a resolver base plate (5) is provided at the end bracket (1) to support a resolver stator (7a), while a resolver rotator (7b) is supported by a resolver rotor adapter (6). Each supporting member is made of a nonmagnetic material.

Description

technical field [0001] The present invention relates to a motor equipped with a resolver and a grease-replaceable motor with a resolver, and more particularly to a grease-replaceable motor having an improved structure in which the resolver is not affected by magnetic flux leaking from the motor body electric motor. Background technique [0002] For example, as disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 2001-78393 ), there is a resolver as one of detecting devices for detecting the rotational positions of rotating equipment such as electric motors and generators. Conventionally, a resolver having excellent environmental resistance is used as a rotational position detection device of a motor for a hybrid vehicle used under severe conditions of high temperature, low temperature, and vibration. In order to obtain rotation accuracy, the resolver is installed near the bearing, but the bearing is often used as a sealed bearing filled with grease or an oil-lubric...

AI Technical Summary

Problems solved by technology

[0004] However, motors with replaceable grease are not used in automotive motors represented by hybrid vehicles.

Since the electric motor is installed under or inside the vehicle body, it is mounted in a place where human hands cannot easily enter and exit. Therefore, it is considered that it is difficult to enter and exit the grease supply port or discharge port provided on the electric motor, and one of the reasons is lack of maintainability.

However, there are vehicles that cannot be lubricated with oil, so a motor with a grease replaceable structure and a resolver is required. The structure of the grease replaceable type is complicated and the size is also large. In addition, if the resolver is mounted near the bearing The size of the motor becomes larger

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