Multi-direct-current motor series system and torque control method

A DC motor and torque control technology, applied in the direction of DC motor speed/torque control, motor speed or torque control, control system, etc., can solve problems such as dependence and motor parameter influence, and achieve fast current response, Improved stability and simple hardware circuit

Active Publication Date: 2020-07-28
CHANGAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, this idea relies too much on the mathematical model of the motor and is easily affected by the parameters of the motor

Method used

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  • Multi-direct-current motor series system and torque control method
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  • Multi-direct-current motor series system and torque control method

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Embodiment Construction

[0049] In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

[0050] see figure 1 , the present invention provides a multi-DC motor series system, including a PI control module, a reference torque calculation module, an actual torque calculation module, a hysteresis loop control module, a PWM generation module and a motor drive module, through the integration of the above modules to achieve n ...

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Abstract

The invention discloses a multi-direct-current motor series system and a torque control method. The method comprises steps of employing n position sensors to detect the motor rotor positions of n direct-current motors, obtaining the actual rotating speeds of the n direct-current motors through the calculation of the rotating speeds, comparing the actual rotating speeds with n reference rotating speeds, and obtaining reference current values of the n direct-current motors through the output of a PI controller; obtaining n+1 reference torques through a reference torque calculation module; detecting transient current values of the n direct-current motors, and processing the transient current values of the n direct-current motors through an actual torque calculation module to obtain n+1 actualtorque values; comparing the calculated n+1 actual torques with n+1 reference torques, then transmitting the signals to n+1 hysteresis controllers to generate n+1 output signals, and generating 2n+2paths of PWM signals through a PWM module; inputting 2n+2 paths of PWM signals, and driving the (n+1)-phase voltage type inverter so that the motor is further driven to realize torque control. The method is advantaged in that the circuit structure can be simplified, cost is saved, the optimized torque control effect is realized, and stability of the system is improved.

Description

technical field [0001] The invention belongs to the technical field of multi-DC motor control, and in particular relates to a multi-DC motor series system and a torque control method. Background technique [0002] With the development of production technology, higher requirements are put forward for the speed regulation accuracy, speed regulation range, static characteristics, dynamic response and torque ripple of DC motors. The control strategy based on the steady-state model can no longer meet the high-precision process requirements. In order to improve the dynamic performance, the control strategy must rely on the dynamic mathematical model of the motor. The most ideal control method is to control the torque and excitation components of the motor at the same time. That is to use the idea of ​​decoupling to decompose the complex speed control system into torque ring and magnetic linkage ring. [0003] However, this idea relies too much on the mathematical model of the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P5/685H02P7/281
CPCH02P5/685H02P7/281H02P7/2815
Inventor 林海李超杰李杰李晓辉
Owner CHANGAN UNIV
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