Double modulation alternating pole permanent magnet cursor motor and application thereof

Abstract

The invention discloses a double modulation alternating pole permanent magnet cursor motor and application thereof. The cursor motor comprises a primary core; an armature winding is arranged in each open slot of the primary core; and the same sides of the armature windings are provided with primary permanent magnets with a uniform magnetization direction; and the magnetization direction of the permanent magnets is parallel to the direction of movement of the primary core, thereby forming a first alternating pole permanent magnet excitation array. The cursor motor also comprises a secondary core arranged parallel to the primary core at an interval and located on the slot side the primary core. The primary core and the secondary core can move relative to each other. The secondary core is provided with a plurality of open slots at intervals relative to the surface of the primary core, and secondary permanent magnets are arranged in the open slots. The magnetization direction of the secondary permanent magnets is perpendicular to the direction of movement of the primary core, thereby forming a second alternating pole permanent magnet excitation array; and the first and second alternating pole permanent magnet excitation arrays are matched in terms of magnetization direction. The secondary motor of the invention adopts the array of alternating pole permanent magnets, so that the amount of permanent magnets can be greatly reduced compared with a conventional secondary surface-mount permanent magnet linear motor, which significantly reduces the cost of the motor.

Description

technical field [0001] The invention relates to the technical field of permanent magnet motors, in particular to a dual-modulation alternating pole permanent magnet vernier motor and its application. Background technique [0002] At present, CNC machine tools are developing in the direction of precision, high speed, compound, intelligence and environmental protection. Precision and high-speed machining put forward higher requirements for transmission and its control, higher dynamic characteristics and control accuracy, higher feed speed and acceleration, lower vibration noise and smaller wear. The crux of the problem is that the traditional transmission chain from the motor as the power source to the working parts has to go through intermediate transmission links such as gears, worm gears, belts, leadscrews, couplings, clutches, etc., and a large moment of inertia is generated in these links , elastic deformation, backlash, motion hysteresis, friction, vibration, noise and ...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the defects of the prior art, the purpose of the present invention is to solve the problem that the existing permanent magnet vernier motor has a large amount of permanent magnets and high material cost when it has a long stroke; in use, due to the large number of permanent magnet poles, it is easy to form a large amount of magnetic flux leakage, and the motor The secondary surfaces are all surface-mounted with permanent magnets. The permanent magnets are brittle materials that are easy to damage, and the technical problem that the thrust density still cannot meet the higher requirements of the acceleration performance index

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