Independent sinusoidal driving permanent magnet synchronous fault-tolerant linear motor

Abstract

The invention discloses an independent sinusoidal driving permanent magnet synchronous fault-tolerant linear motor. The bottommost of the central position of a base is provided with flat non-magnetic long back iron which is provided with a flat halbach permanent magnet array long stator; a flat alveolar structural rotor is arranged above the flat halbach permanent magnet array long stator; an air gap is arranged between the stator and the rotor; linear guideway pairs are arranged on the base and at both sides of the flat non-magnetic long back iron; displacement sensors are arranged on the base and between the linear guideway pairs and the flat non-magnetic long back iron; the rotor comprises fault-tolerant teeth, armature teeth, concentrated windings twisted on the armature teeth, and a Hall sensor positioned on the lower end of the concentrated windings of an armature; the fault-tolerant teeth and the armature teeth are arranged at intervals; and rotor slots are positioned between the fault-tolerant teeth and the armature teeth. The invention has the advantages of simple structure, good independence among phases, small thrust fluctuation, easy heat radiation, high energy density, high reliability, higher fault-tolerant capability and the like.

Description

Technical field: [0001] The invention relates to the technical fields of electrician, motor and control, and is suitable for the motor drive field with high requirements on the system's trouble-free and continuous operation performance, and has a permanent magnet synchronous fault-tolerant linear motor structure with high reliability and high fault tolerance. Background technique: [0002] Compared with the linear displacement system driven by the rotary motor, the linear motor is a transmission device that directly converts electrical energy into linear motion mechanical energy without any intermediate conversion mechanism. It has large starting thrust, fast dynamic response, high positioning accuracy, speed and With the advantages of large acceleration, low vibration and noise, and unlimited stroke length, it realizes direct drive with simple structure, less nonlinear links and good dynamic response performance. It is a new technology that achieves high precision, high acce...

AI Technical Summary

Problems solved by technology

At present, permanent magnet fault-tolerant rotating motors are mainly used in aerospace, military, field mining and other special fields with large-scale investment in the country, but due to the permanent magnets embedded in the motor, it is not easy to dissipate heat, and the digital control system is relatively complex and other unfavorable factors , making it not yet widely used

[0006] At present, patents such as CN1886887, CN1937356A, CN101662256A, and CN101667805 all propose the concept of fault-tolerant motors, but they all apply fault-tolerant motors to rotating motors and have not been used in linear motors; Journal of Xi'an Jiaotong University published the document "A A Permanent Magnet Array Design for a Permanent Magnet Linear Motor" uses multiple permanent magnets to form a segmented Halbach array, but the armature winding is used as the stator, and the permanent magnet is used as the mover, which increases the cost. The armature winding does not mention the concentrated winding. And there are no fault-tolerant teeth, and no mention of the structure and concept of permanent magnet synchronous fault-tolerant linear motors

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