Dynamically vertically end portion effect weakened short primary linear motor

Abstract

The present invention discloses a dynamically vertically end portion effect weakened short primary linear motor. The motor comprises a primary iron core, and a winding and a secondary winded on the primary iron core; the end winding of the primary iron core is a full tank structure; the length of a tooth located at the end portion of the primary iron core is smaller than the length of a tooth located at the middle portion of the primary iron core, and the length of a tooth, close to the middle portion of the primary iron core, located at the end portion of the primary iron core is not smallerthan the length of a tooth, far away from the primary iron core, located at the end portion of the primary iron core. The teeth at the incoming end portion and the outgoing end portion of a short primary are regularly shortened and electromagnetic gaps of corresponding end portions are regularly increased to allow the magnetic field change intensity of the incoming end and the outgoing ends of theprimary to be weakened during movement of the linear motor and relieve the magnetic distortion degree of the end portion of the primary end so as to reduce the additional loss and the electromagneticresistance generated by a dynamically vertically end effect and achieve the purposes of increasing output thrust, improving the traction efficiency and reducing the thrust fluctuation.

Description

technical field [0001] The invention belongs to the field of linear motors, and more specifically relates to a short primary linear motor with weakened dynamic longitudinal end effects. Background technique [0002] Due to the advantages of simple structure, low noise, large traction force, convenient maintenance and low operating cost of longer primary linear motors, short primary linear motors are widely used in many industrial fields, especially in rail transit. The train driven by the linear motor has the following advantages compared with the train driven by the rotary motor: (1) the overall energy consumption of the system is low; (2) the turning radius of the train is small; (3) the climbing ability is strong; (4) the tunnel height required by the train is small , and the cost is low; (5) The train accelerates quickly, and the running noise is small. However, the linear motor also has its disadvantages. Since the primary iron core of the linear motor is disconnected,...

AI Technical Summary

Problems solved by technology

[0003] In view of the above defects or improvement needs of the prior art, the present invention provides a short primary linear motor with a weakened dynamic longitudinal end effect, which aims to solve the dynamic longitudinal end effect caused by the disconnection of the primary iron core of the existing linear motor, Technical issues that result in reduced motor output performance

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