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Double-DC-motor parallel system and current hysteresis control method

A dual DC motor, DC motor technology, applied in the direction of DC motor speed/torque control, excitation or armature current control, control of multiple DC motors, etc., can solve the complex debugging process, many adjustable parameters of PI controller, system fluctuation and other problems, to achieve the effect of improving current response, enhancing fast response capability, and reducing component cost

Active Publication Date: 2020-07-28
CHANGAN UNIV
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AI Technical Summary

Problems solved by technology

However, the PI controller has many adjustable parameters, and the debugging process is complicated. A slight inappropriate parameter will cause great fluctuations in the system

Method used

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  • Double-DC-motor parallel system and current hysteresis control method
  • Double-DC-motor parallel system and current hysteresis control method
  • Double-DC-motor parallel system and current hysteresis control method

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Embodiment Construction

[0058] The present invention provides a current hysteresis control method and system based on dual DC motors. The actual speed of the motor and the reference speed are PI adjusted to obtain the value of the reference current, and then the reference current is synthesized, and after reconstruction calculation The actual current of the motor is adjusted by PI again, and the obtained current is controlled by hysteresis, and the three-phase inverter circuit is driven by PWM pulse regulation, so that the current hysteresis control of the double DC motor parallel system is realized.

[0059] see figure 1 with figure 2 , a dual DC motor parallel system of the present invention adopts a dual DC motor three-arm inverter structure, including:

[0060] The controller, the inverter bridge arm L1, the inverter bridge arm L2 and the inverter bridge arm L3; the three-phase inverters are connected in parallel and connected to a common DC power supply.

[0061] DC motor M1:

[0062] The po...

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Abstract

The invention discloses a double-DC-motor parallel system and a current hysteresis control method. The method includes steps that rotating speed signals and current signals of double direct current motors are collected; the system set reference speed and the actual rotating speed signal of the direct current motor are made to pass through a speed adjusting module to obtain a speed error, and the speed error is made to pass through a PI controller to obtain a reference current; current synthesis calculation of the reference current is performed to obtain three groups of combined currents; current reconstruction calculation of the collected current signals is performed to obtain three groups of reconstructed current signals; the synthesized current signal is compared with the reconstructed current signal through a hysteresis comparator to generate a PWM pulse signal, and a working state of an inverter circuit switching device is controlled, so driving of the double DC motors is realized.The method is advantaged in that the current response speed is improved, the harmonic current is quickly supplemented, a tracking error of the system is reduced, and stability is very high.

Description

technical field [0001] The invention belongs to the technical field of motor systems and controls, and in particular relates to a double DC motor parallel system and a current hysteresis loop control method. Background technique [0002] Since the 21st century, with the acceleration of the world's population and the further development of industry, energy issues and environmental pollution issues have become more and more important. A low-carbon and environmentally friendly lifestyle has become the mainstream development trend of society. While automobiles bring convenience to human life, they also make the pollution problem worse. The exhaust gas emitted by the burning fuel of the electric vehicle engine contains a large amount of carbon monoxide, carbon dioxide and other gases, which has brought many adverse effects on the air in the natural environment, land resources and even human survival and health. In order to lead the mainstream trend of human future social develop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P5/68H02P7/28H02P7/281
CPCH02P5/68H02P7/28H02P7/2805H02P7/281H02P7/2815
Inventor 林海景治鑫左磊朱旭
Owner CHANGAN UNIV
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