Double-winding high-powder-density mixed excitation permanent-magnet linear generator

Abstract

The invention discloses a double-winding high-powder-density mixed excitation permanent-magnet linear generator which comprises a stator, wherein an even number of stator teeth are uniformly arranged on the stator; a stator slot is formed between two adjacent stator teeth; a permanent magnet is arranged between each stator slot yoke and a corresponding stator back yoke; a main gap is formed between each stator tooth and the corresponding rotor tooth of a rotor; each stator slot comprises armature slots and excitation slots which are arranged at an interval in an alternated manner; a set of excitation winding is arranged in the two adjacent excitation slots in a surrounding manner; direct current without changed direction is introduced into the excitation windings; additional gas gaps are formed in the middles of the yokes of the stator slots on which the excitation windings are positioned; one part of magnetic flux generated by two adjacent permanent magnets enters the rotor by the main gas gaps to form main magnetic flux, and the other part of the magnetic flux generated by the two adjacent permanent magnets passes through the additional gas gaps to form leaked magnetic flux. The double-winding high-powder-density mixed excitation permanent-magnet linear generator can be used for adjusting the leaked magnetic flux by adjusting the direction and the size of the current in the excitation windings, so that effects of magnetism enhancing and magnetism removing can be realized.

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...

AI Technical Summary

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

Images