Switched reluctance motor control method capable of suppressing bus current ripple

Abstract

The invention discloses a switched reluctance motor control method capable of suppressing bus current ripple, which comprises an arbitrary phase motor, and is characterized in that a single-chip microcomputer is set to be used for driving a power tube corresponding to an A-phase winding, a B-phase winding and a C-phase winding, different control methods are set in allusion to different numbers of turn-on phases, a current sensor is set to be used for acquiring each phase of current in real time and transmitting the acquired current to the single-chip microcomputer, and a bus current value is solved; and the single-chip microcomputer controls the power tube by PWM signals with the frequency being 10kHz, realizes speed regulation for the motor and judges according to a current sampling signal, the bus current value and each phase turn-on signal. According to the switched reluctance motor control method capable of suppressing bus current ripple, control for the flowing direction of phase current is realized through comparing excitation phase current and turn-off phase current and switching between natural follow current and fast follow current in phase changing, low-frequency phase-changing harmonic waves are filtered at the same time, the ripple current of a bus capacitor is reduced, the cost is further compressed, and the design difficulty of a controller is reduced.

Description

technical field [0001] The invention belongs to the technical field of motor control, and in particular relates to a switched reluctance motor control method for suppressing bus current pulsation. Background technique [0002] Sampling the bus current integral control to reduce the bus capacitance value, an integrator is connected to the output of the sensor, and the reduction of the bus capacitance is realized by controlling the bus current integral value, but a high frequency integrator is required, and each phase current Both need to be sampled, which not only increases the complexity of the processor, but also increases the cost. Moreover, this method has a limit on the maximum speed and cannot be implemented at full speed. [0003] In the traditional switched reluctance motor drive system, the energy exchange between the current source and the motor during commutation is the main cause of bus voltage and current pulsation, so a large-capacity electrolytic capacitor is n...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a switched reluctance motor control method for bus current pulsation suppression, to solve the electrolytic capacitor size, volume, cost and reliability proposed in the background technology are the main contradictions and limit their high power Density, high reliability of such potential applications, the traditional method of reducing the capacitance value is to change the converter structure or adjust the power factor to achieve, but this will increase the complexity, size and cost of the system, and will even affect The problem of system efficiency

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