A dual 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 problem of many adjustable parameters of PI controller, complex debugging process, system fluctuation and other problems, to achieve the effect of enhancing rapid response capability, improving response capability and reducing component cost

Active Publication Date: 2021-07-23
CHANGAN UNIV
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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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  • A dual DC motor parallel system and current hysteresis control method
  • A dual DC motor parallel system and current hysteresis control method
  • A dual 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 then 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 and 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 positive pole is connected to the midpoint a of ...

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Abstract

The invention discloses a dual DC motor parallel system and a current hysteresis loop control method, which collects the rotational speed signal and the current signal of the dual DC motor; and obtains the speed error by passing the system set reference speed and the actual rotational speed signal of the DC motor through a speed adjustment module , the speed error is obtained through the PI controller to obtain the reference current; the current synthesis calculation is performed on the reference current to obtain three sets of combined current; the current reconstruction calculation is performed on the collected current signal to obtain three sets of reconstructed current signals; through the hysteresis comparator, The synthesized current signal is compared with the reconstructed current signal to generate a PWM pulse signal to control the working state of the switching device of the inverter circuit and realize the drive of the dual DC motors. The invention improves the current response speed, realizes the rapid supplement to the harmonic current, reduces the tracking error of the system, and has strong stability.

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 Patents(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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