Phase-shifting and shifting unit combined permanent magnet synchronous linear motor

Abstract

The invention discloses a phase-shifting and shifting unit combined permanent magnet synchronous linear motor, and belongs to the technical field of a linear motor. The phase-shifting and shifting unit combined permanent magnet synchronous linear motor is formed by a first unit motor, a motor spacer, a second unit unit, a mover, a first stator core, a second stator core, a first stator coil and asecond stator coil. A conventional linear motor is split into two unit motors and phase-shifting and shifting are carried out; and by utilizing a superposition principle, thrust ripples respectively generated by two unit motors are reversely superposed to be weakened or eliminated so as to effectively inhibit a thrust ripple of the permanent magnet linear motor. An air or magnetic isolation material is positioned between two adjacent unit motors so as to effectively eliminate magnetic field interference between two unit motors. A plurality of unit motors can also be adopted to be combined in series, and meanwhile, phase-shifting and shifting are carried out, so that an effect of synthesizing a high thrust motor by utilizing low thrust motors can be achieved. The phase-shifting and shiftingunit combined permanent magnet synchronous linear motor has the advantages of simple process, low cost, obvious effect of inhibiting the thrust ripple and the like, and has very high theoretical significance and engineering practical value.

Description

technical field [0001] The invention relates to a permanent magnet synchronous linear motor, in particular to a permanent magnet synchronous linear motor with phase-shifting unit combination. It belongs to the technical field of linear motors. Background technique [0002] Linear motors have played an increasingly important role in recent decades. What makes them superior to rotary motors is that there is no electromagnetic transmission conversion device of any intermediate mechanism, but a device that directly converts electrical energy into mechanical motion, so it is obtained a wide range of applications. Permanent magnet linear synchronous motor has the dual advantages of permanent magnet motor and linear motor, and its small size, fast response and simple structure have broad application prospects. However, due to the cogging effect and end effect of the linear motor, the thrust of the linear motor fluctuates greatly, which affects the performance of the linear motor ...

AI Technical Summary

Problems solved by technology

However, due to the cogging effect and end effect of the linear motor, the thrust of the linear motor fluctuates greatly, which affects the performance of the linear motor and cannot be applied to some occasions with high precision requirements. Therefore, measures should be taken to suppress the thrust of the linear motor fluctuation

[0003] At present, scholars at home and abroad have done a lot of work on the suppression of thrust fluctuations of permanent magnet linear motors, mainly including cutting the teeth of the motor, changing the width of the teeth at the side and end of the motor, using semi-closed slots, changing the pole arc coefficient, opening auxiliary slots, and From the control strategy to suppress thrust fluctuations, etc., the process is complicated and the cost is high, and the effect of suppressing thrust fluctuations is also uneven, and there are many defects.

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