Three-direct-current motor parallel system and current control method

Abstract

The invention discloses a three-direct-current motor parallel system and a current control method. The method is characterized in that the actual rotating speed is outputted by a rotating speed calculation module through a position sensor, calculation is performed in combination with a reference rotating speed value; four paths of reference current values are calculated by a reference current calculation module according to three paths of reference current values obtained by processing the calculated rotating speed error through a PI adjustment module, actual four paths of current values are calculated by processing the actual three paths of current values of the branch through a current reconstruction calculation module, and a current error is calculated according to the actual current values and the reference current values; the calculated current error is made to enter a hysteresis control module to obtain four paths of pulse signals; the pulse signals enter a PWM module to be subjected to pulse adjustment, the PWM duty ratio is obtained, a working voltage of a direct-current motor and a direct-current power supply are compared through a four-phase voltage source inverter, and parallel three-direct-current motor control is achieved. The method is advantaged in that related control of a three-parallel-connection direct-current motor can be effectively achieved, operation difficulty is small, and understanding is convenient.

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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