Modular complementary type primary permanent magnet linear motor and motor module formed thereby

Abstract

The invention discloses a modular complementary type primary permanent magnet linear motor and a motor module formed thereby. The primary permanent magnet linear motor comprises a primary level and a secondary level; the primary level and the secondary level are respectively in a salient-pole structure, and an air gap is formed between the two levels; the primary level comprises a rotor module which comprises a first module and a second module; a first non-magnetic material is arranged between the first module and the second module; the first module and the second module both comprise two salient-pole magnetic materials and a permanent magnet arranged between the two salient-pole magnetic materials; the salient-pole magnetic material is provided with m numbered primary teeth, and a central armature winding is arranged on the primary teeth; the relative displacement between the first module and the second module is calculated as follows: lambda2=(k+/-0.5) tau s; the relative displacement between the adjacent two salient-pole magnetic materials is calculated as follows: lambda1=m*tau m; and the ratio of the primary polar distance to the secondary polar distance is as follows: tau m: tau s=(m+/-1):m. The invention has the advantages of symmetric back electromotive force, relatively small positioning force, low thrust fluctuation and the like and is applicable to the application occasion of a linear motor with a long-stator structure.

Description

technical field [0001] The invention relates to a primary permanent-magnet linear motor, in particular to a modular complementary primary permanent-magnet linear motor and a motor module composed of it, and belongs to the technical field of motor manufacturing. Background technique [0002] With the development of industry, linear motors are widely used. The use of linear motor drive can save the traditional rotary motor, and convert the rotary motion into the mechanical gear of linear motion. It can reduce cost, reduce noise, reduce system volume and reduce maintenance cost. Especially in rail transit applications, when a rotating motor is used to drive, the driving force is generated by the adhesion between the wheel and the rail. When the speed is too high or deceleration, there will be problems such as wheel-rail slippage. Therefore, the technical means of replacing the rotary motor with a linear motor can overcome the above-mentioned shortcomings of the rotary motor i...

AI Technical Summary

Problems solved by technology

However, traditional linear motors need to add auxiliary teeth and permanent magnets to balance the magnetic circuit of the end phase windings, and at the same time have the disadvantages of back EMF waveform asymmetry and large positioning force, resulting in large thrust fluctuations in the motor

Therefore, it affects the dynamic performance of the linear motor with this structure

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