A three-DC motor parallel system and current control method

Abstract

The invention discloses a parallel connection system of three DC motors and a current control method. The position sensor outputs the actual rotational speed through the rotational speed calculation module, and calculates it with the reference rotational speed value, and the calculated rotational speed error is obtained through the PI adjustment module to obtain the three-way reference For the current value, four reference current values ​​are calculated by the reference current calculation module, the actual three current values ​​of the branch are calculated by the current reconstruction calculation module to calculate the actual four current values, and the actual current value and the reference current value are calculated Output the current error; enter the calculated current error into the hysteresis control module to obtain four pulse signals; enter the pulse signal into the PWM module for pulse adjustment, obtain the PWM duty cycle, and compare the DC through the four-phase voltage source inverter The working voltage of the motor and the size of the DC power supply realize the control of three DC motors in parallel. The invention can effectively realize the relative control of the three-parallel direct current motor, has little difficulty in operation and is easy to understand.

Description

technical field [0001] The invention belongs to the technical field of motor systems and controls, and in particular relates to a three-DC motor parallel system and a current control method. Background technique [0002] With the rapid development of my country's economy, the continuous progress of society, and the rapid development of science and technology, in this context, my country's motor technology level has been well developed. Traditional electrical technology only processes some simple mechanical parts. Compared with traditional motors, modern motor technology has more powerful power after continuous discovery and upgrading, and has become a complete machine for completing different tasks. The electronic electromechanical system has become an indispensable part of people's production and life. Therefore, in the current development environment, DC motors will develop rapidly. [0003] In the process of DC motor development, how to realize the control of the motor ...

AI Technical Summary

Problems solved by technology

[0003] How to realize the control of the motor in the process of the development of the DC motor is often complex in structure, covers many devices, and often covers insufficient performance. Therefore, it is particularly important to use a better four-quadrant control method for the motor.

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