A Double Winding High Power Density Hybrid Excitation Permanent Magnet Linear Generator

Abstract

The invention discloses a double-winding high power density hybrid excitation permanent magnet linear generator, comprising a stator, an even number of stator teeth are evenly arranged on the stator, stator slots are arranged in two adjacent stator teeth, the stator slot yoke and the stator back There are permanent magnets between the yokes, and a main air gap between the stator teeth and the mover teeth of the mover; the stator slots include armature slots and excitation slots, the armature slots and excitation slots are arranged alternately, and two adjacent There is a set of armature windings in the armature slots, and a set of excitation windings in the two adjacent excitation slots. The excitation windings pass DC current in the same direction; there is an additional air gap in the yoke of the stator slot where the excitation windings are located. , part of the magnetic flux generated by two adjacent permanent magnets enters the mover through the main air gap to form the main magnetic flux, and the other part passes through the additional air gap to form the leakage flux. The present invention can adjust the magnitude of the leakage magnetic flux by adjusting the direction and magnitude of the current in the excitation winding, so as to play the role of magnetization and demagnetization.

Description

technical field [0001] The invention relates to a double winding high power density hybrid excitation permanent magnet linear generator. Background technique [0002] The linear motor drive device can directly convert the input electric energy into linear kinetic energy on the required occasion, realize linear motion, save the mechanical transmission conversion device in the traditional motion-linear conversion drive mode, and greatly reduce the volume of the transmission device. It improves the reliability and efficiency of the whole system, and effectively reduces the cost and maintenance cost of the equipment. Not only that, but also the high speed, high precision and robustness that the traditional motion-linear conversion drive method cannot achieve. In addition, the transmission conversion device will significantly increase the vibration and noise of the transmission system, reducing the control accuracy and performance of the system. Therefore, in the modern industri...

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Problems solved by technology

[0009] In order to solve the above problems, the present invention proposes a double-winding high power density hybrid excitation permanent magnet linear generator. There is a set of stator armature windings and a set of excitation windings on the stator of the permanent magnet motor, and only There is one set of windings. During operation, only one set of armature windings passes through AC current, and the other set of excitation windings passes through DC current. There is no need for phase-to-phase insulation in the slots, the slot fullness rate is high, and the process of motor winding off-line is simple, and the overall cost is lower than that of the current one. There are various types of three-phase induction motors and permanent magnet motors; the permanent magnets are fixed on the stator and do not reciprocate with the mover, which is easy to install and conducive to heat dissipation, eliminating the problem of ordinary permanent magnet linear motors due to the reciprocating motion of the permanent magnet with the mover. Mechanical stress damage, poor heat dissipation of permanent magnets and other shortcomings

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