A harmonic excitation electric excitation doubly salient pole motor and its control method

Abstract

The embodiment of the invention discloses a harmonic excitation electric excitation double salient pole motor and a control method thereof, which relate to the technical field of motor design and control. The harmonic winding is rectified by the rectifier circuit to generate direct current, which supplies power for the excitation control circuit and the power generation control unit, improving the independence and efficiency of the power generation system; the harmonic winding current can suppress the change rate of the self-inductance of the excitation winding, thereby reducing the fluctuation of the excitation voltage. Improve the stability of excitation current regulation. The invention includes: the stator core is a salient pole structure and is composed of a plurality of stator poles; the rotor core is a salient pole structure and is composed of a plurality of rotor poles; each stator pole is simultaneously wound with an excitation coil, a harmonic coil and an armature coil , each armature coil is wound on two stator poles; the excitation coils of each stator pole are connected in series to form an excitation winding, the harmonic coils of each stator pole are connected in series to form a harmonic winding, and the armature coils of each stator pole are connected in series Form the armature winding. The invention is suitable for electric excitation double salient pole motors.

Description

technical field [0001] The invention relates to a harmonic excitation electric excitation double salient pole motor and a control method thereof, belonging to the field of harmonic excitation electric excitation double salient pole motors. Background technique [0002] Rotor-excited permanent magnet motors have the advantages of high power density and high efficiency, and are widely used in many fields such as electric vehicles and industrial automation. However, the application of traditional rotor-excited permanent magnet motors is constrained by the following conditions: on the one hand, the production cost of rotor-excited permanent magnet motors is relatively high due to the high price of rare earth permanent magnet materials, and rare earth resources are increasingly scarce; on the other hand, , The air-gap magnetic field generated by the permanent magnet is difficult to adjust. When operating as a generator, the output voltage of the motor is difficult to adjust, and ...

AI Technical Summary

Problems solved by technology

This solution needs to introduce a rotating rectifier to the rotor of the rotor-excited brushless harmonic excitation synchronous generator. When the operating temperature of the motor is high, the reliability of the motor operation is reduced due to the poor temperature resistance of the power device; and when When the motor is rotating at high speed, the rotating rectifier on the rotor and its corresponding protection components (such as fast fuses, resistors, capacitors, etc.) will be subject to considerable centrifugal force, which also greatly reduces the reliability of the motor operation

[0005] In summary, the current schemes all have the problem of poor reliability

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