A five-phase cylindrical fault-tolerant permanent magnet linear actuator for vehicle electromagnetic suspension drive

Abstract

The invention discloses a five-phase cylindrical fault-tolerant permanent magnet linear actuator for driving a vehicle electromagnetic suspension. The fiver-phase cylindrical fault-tolerant permanent magnet linear actuator comprises a stator ring, a rotor ring and a supporting shaft. The stator ring is composed of a disc-shaped primary iron core and a disc-shaped winding, the primary iron core is formed by arranging identical standard-E-shaped iron core bodies in the axial direction, teeth, leaning together, of the adjacent standard-E-shaped iron core bodies form fault-tolerant teeth, a concentrated winding is adopted as the winding, the winding is wound into a disc shape to be embedded into an E-shaped iron core groove, and the rotor ring comprises a permanent magnet and is arranged on the supporting shaft. The reliability and the capability of operation with faults of the fiver-phase cylindrical fault-tolerant permanent magnet linear actuator are improved, and physical isolation and magnetic path decoupling among phases are achieved. The fiver-phase cylindrical fault-tolerant permanent magnet linear actuator can operate in a fault-tolerant mode, and the heat dispersion performance of the winding is improved. Eddy-current losses on the iron core are lowered.

Description

technical field [0001] The invention relates to the field of vehicle electromagnetic suspension, in particular to a five-phase cylindrical fault-tolerant permanent magnet linear actuator for driving the electromagnetic suspension. Background technique [0002] Existing vehicle electromagnetic suspension drive motors generally adopt two types of rotary motors and linear motors. The rotary motor needs to drive the suspension with the aid of a rack and pinion or a ball screw transmission mechanism, while a linear motor can directly drive the suspension without an intermediate transmission mechanism, and has the advantages of fast response, high efficiency, and high control precision. Therefore, linear motors are more advantageous in electromagnetic suspensions than rotary motors. Although linear induction motors have advantages such as low cost and high reliability, there are disadvantages such as low efficiency and power factor. Cylindrical linear permanent magnet motor has ...

AI Technical Summary

Problems solved by technology

The patent application No. is 201410018433.X Invention Patent "An Electromagnetic Damping and Shock Reduction Device for Vehicle Suspension" considers the fault-tolerant performance of the permanent magnet linear motor body, but at present, 12V or 24V batteries are generally installed on cars; The suspension generally requires the actuator to provide a peak thrust of 2.5kN, and the thrust density is relatively high; in addition, if the thrust of the motor fluctuates greatly, it will cause chattering of the suspension

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