A DC bias sinusoidal current motor controller

Abstract

The present invention provides a direct current bias sinusoidal current motor controller, belonging to the alternating current motor driving control device. The problem is solved that the number of the power electronic devices of a single-phase full-bridge converter employed by the current controller and the required controller resources are too many. The controller comprises a first subtracter, a second subtracter, a third subtracter, fourth subtracter, a speed regulator, a d shaft current regulator, a q shaft current regulator, a 0 shaft current regulator, a pulse width modulator, a converter, a motor shaft coder, an A phase Hall current sensor, a B phase Hall current sensor, a C phase Hall current sensor, a current converter and a differentiator. The converter is formed by connecting a direct current power, 6 MOS field-effect transistors and 6 free-wheeling diodes. The size and the weight of the direct current bias sinusoidal current motor controller are small so as to avoid the bridge arm direct connection risk of the traditional structure, improve the reliability of the motor driving system, effectively reduce the usage number of the power electronic devices, especially the usage number of the power devices and greatly reduce the cost of the control, so that the direct current bias sinusoidal current motor controller is suitable for the driving control of a novel stator direct current excitation motor.

Description

technical field [0001] The invention belongs to an AC motor drive control device, in particular to a DC bias sinusoidal current motor controller, which is used for drive control of a novel stator DC excitation motor. Background technique [0002] Permanent magnet motors have the advantages of high power density, high efficiency, and high power factor, but the cost of permanent magnet motors is relatively high. The traditional switched reluctance motor has a simple structure and low cost, but due to its unique power supply method, there is a large current peak at the moment the switch is turned off, so the vibration and noise of the motor are very large. In addition, the torque ripple of the motor Also larger. These shortcomings affect the use of switched reluctance motors in some occasions that require high vibration and noise. In order to improve the above two motors, in recent years, some scholars have proposed a DC bias sinusoidal current motor, such as figure 1 As sho...

AI Technical Summary

Problems solved by technology

[0006] The invention provides a DC bias sinusoidal current motor controller, which solves the problems of the number of power electronic devices and excessive controller resources required in the single-phase full-bridge converter used in the existing controller

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