Low-speed high-torque wide-speed-regulation permanent magnet synchronous motor

Abstract

The invention relates to a low-speed high-torque wide-speed-regulation permanent magnet synchronous motor, solving the problems that the torque is wasted and the speed regulation range is narrow and the like for the traditional indirect driving mode and the existing direct driving mode for constant-power load. The low-speed high-torque wide-speed-regulation permanent magnet synchronous motor comprises a motor seat, a stator iron core with a winding, a rotor and an encoder, wherein the stator iron core, the rotor and the encoder are assembled on the motor seat. The technical points of the invention are as follows: a permanent magnet is attached to the inner periphery of the rotor connected with a hollow shaft sleeve and is arranged outside the stator iron core; the hollow shaft sleeve is assembled in an axial hole of the motor seat by a left bearing, a right bearing and inner-circle stopping rings and outer-circle stopping rings of the bearings, and is pressed tightly by a left bearingcover and a right bearing cover fixed on the motor seat so as to carry out axial limiting; and a winding speed regulation device is utilized for controlling the connection of windings of the stator iron core so as to complete the step speed regulation based on speed-section selection and realize the stepless variable-frequency speed regulation in a single speed section. The low-speed high-torque wide-speed-regulation permanent magnet synchronous motor has the advantages of reasonable design, simple structure, low speed, high torque, wide speed regulation range, high efficiency, small volume, low cost, energy saving and the like, and is convenient to install and maintain.

Description

technical field [0001] The invention relates to a permanent magnet synchronous motor, in particular to a permanent magnet synchronous motor with low speed, large torque and wide speed regulation, which adopts changing the connection mode of the stator winding for speed regulation. Its speed range is 0.1rpm-6000rpm, and the rated torque is not less than 300Nm at low speed. The invention belongs to the technical field of permanent magnet synchronous motors. Background technique [0002] The load characteristics of existing constant power loads such as machine tools, rolling mills, and paper machines are constant torque characteristics at low speeds, and constant power characteristics at high speeds. That is, the drive system is required to provide stable and large torque at low speeds. The drive system can realize constant power speed regulation, and the required speed regulation range is very wide. At present, the drive mode of constant power load includes the indirect ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a low-speed, large-torque, and wide-speed-adjustable permanent magnet synchronous motor, which solves the problems of torque waste and narrow speed regulation range in the traditional indirect drive type and the existing direct drive type of constant power load. Reasonable design, simple structure, low speed, high torque, wide speed range, high efficiency, small size, low cost, energy saving, convenient installation and maintenance, etc.

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