Permanent magnet synchronous motor locating torque test device for new energy vehicle

Abstract

The invention relates to a permanent magnet synchronous motor locating torque test device for a new energy vehicle. The device comprises a torque sensor, a rotating shaft, a motor support, a circular disc, a circular disc support, an angle control slideway device and a circular disc fastening device. A tested motor is installed and fixed at one side of the motor support. The circular disc support is arranged at the other side of the motor support. The circular disc is installed on the circular disc support through the rotating shaft which can rotate along with the circular disc. A motor shaft is connected with the rotating shaft through a connecting member. The torque sensor is installed on the rotating shaft, the motor shaft or the connecting member. The angle control slideway device is installed and fixed at the edge of the circular disc. Locating holes are distributed on the edge of the circular disc along a circumferential direction in a uniformly spaced way. A locating pin installed in any one locating hole can move along the slideway on the angle control slideway device. The circular disc fastening device is arranged at the edge of the circular disc and can fasten and fix the circular disc. The permanent magnet synchronous motor locating torque test device for the new energy vehicle is simple in structure, low in cost and high in test precision.

Description

technical field [0001] The invention relates to a positioning torque testing device and method for a permanent magnet synchronous motor used in a new energy vehicle. Background technique [0002] The positioning torque is an inherent phenomenon of the permanent magnet synchronous motor. It exists when the motor is not controlled and the three phases are disconnected. It will present a periodic pulsating torque with the rotation. From the analysis of the body, it is mainly affected by the magnetic circuit of the motor, and the position related. [0003] The existence of positioning torque seriously restricts the application scope of permanent magnet synchronous motor in the low-speed section performance and resolver high-precision control, so the test positioning torque is for low-speed section performance and resolver high-precision position control system for compensation to reduce the impact on the system has a particularly important meaning. [0004] At present, the tec...

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Problems solved by technology

[0004] At present, the technology for testing the positioning torque of permanent magnet synchronous motors generally has the phenomenon of high cost, low test accuracy and limited test range by the test structure.

The problem of high cost has been explained, but because the relevant patents belong to the shaftless type connected with the measured body, the measured body is limited by the size of the intermediate shaft system, and the entire shaft system of the measured body needs to be changed, so the applicable type There are obvious constraints

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