Double-stator circumferential direction misalignment angle electro-magnetic direct current motor and control method thereof

Abstract

The invention provides a double-stator circumferential direction misalignment angle electro-magnetic direct current motor and a control method thereof, relating to the technical field of direct current motors. The motor comprises a motor shell, a rotational shaft, a stator and a coil of the stator, a rotor and a central exciting coil; a layer of magnetizers are fixedly covered on the surface of the rotational shaft inside the motor shell; the stator comprises a first group of salient pole stators and a second group of salient pole stators; and the rotor comprises a first group of salient pole rotors and a second group of salient pole rotors. The first group of salient pole stators and the first group of salient pole rotors have the same centers, and are in teeth alignment placement; the centers of the second group of salient pole stators and the centers of the second group of salient pole rotors are coaxial, and are placed by staggering a 15-degree mechanical angle in the circumferential direction between teeth. By adopting neural network-based angle optimizing position control, when the voltage on the coil is constant, the torque of the motor is adjusted through changing an angle of flow theta on and a turn-off angle theta off of a main switching tube, which are connected in series with the coil. According to the direct current motor provided by the invention, a magnet exciting coil is added between two groups of stators while the stators are misaligned in the circumferential direction; the torque pulsation is reduced fundamentally; and the demagnetizing risk of a permanent magnet can be avoided.

Description

technical field [0001] The invention relates to the technical field of direct current motors, in particular to a double stator circumferential misalignment angle electric excitation direct current motor and a control method thereof. Background technique [0002] Switched reluctance motors have been widely used in industrial fields due to their simple structure, large output and good speed regulation performance. With the development and application of motor technology, power electronics technology, digital control technology, control theory and sensor technology, on the basis of switched reluctance motor, double salient pole motor has become a new type of special motor developed in recent years. The control technology has become more and more mature. At present, it has been widely used in the fields of aerospace, rail transit, machine tools, automotive electronics, household appliances and industrial process control. However, switched reluctance motors have their disadvanta...

AI Technical Summary

Problems solved by technology

However, switched reluctance motors have their disadvantages: torque ripple and large noise are two factors that limit the application of this motor

There are two main reasons for the torque ripple: one is that the special double salient pole structure of the motor determines that there must be a large torque ripple, especially when the stator and rotor are aligned, at this time the reluctance is the smallest and the flux linkage is saturated. The phase torque output is the smallest; the second is that the motor is used in the operating environment that requires frequent switching of the power converter, that is, the complex voltage harmonic components other than the fundamental wave will be generated during frequent switching, which will also cause the pulsation of the motor

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