DC motor parallel control system and current following control method

A DC motor and control system technology, applied in the direction of DC motor speed/torque control, control system, control of multiple DC motors, etc., can solve the problems of increased cost, complicated equipment wiring, difficult programming, etc., and achieve current response speed. Fast, excellent control accuracy and stability, excellent real-time control performance

Active Publication Date: 2020-07-10
SUZHOU BONRAY MEASURE & CONTROL EQUIP
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AI Technical Summary

Problems solved by technology

This method of connecting multiple controllers to drive multiple motors is not only difficult to program, complicated to connect equipment, but also greatly increases the cost

Method used

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  • DC motor parallel control system and current following control method
  • DC motor parallel control system and current following control method
  • DC motor parallel control system and current following control method

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Embodiment Construction

[0047] 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 can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can 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.

[0048] see figure 1 , the present invention provides a DC motor parallel control system, comprising:

[0049] Speed ​​adjustment module: adjust the difference between the reference speed and the actual speed.

[0050] Reference current calculation module: use the output signals of the five speed regulation modules to calculate six r...

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Abstract

The invention discloses a DC motor parallel control system and a current following control method, and the method comprises the steps: obtaining a reference initial current through five PI regulatorsaccording to a difference between a given reference rotating speed and an actual rotating speed; calculating a required reference current value from the reference initial current through a reference current reconstruction calculation module; obtaining a calculated current value from the current value the output end of a six-phase voltage source type inverter passes through a current reconstructioncalculation module; providing the difference value between the calculated current value and the reference current value for a hysteresis comparator to generate square wave signals with equal amplitude and unequal width; converting the square wave signals, by a PWM module, into a switching signal for driving an IGBT; transmitting a PWM signal to the six-phase voltage source type inverter module, controlling the five direct current motors to work normally by the six-phase voltage source type inverter module, and realizing four-quadrant operation of the motors. The invention provides a novel motor control method by adopting a reference current reconstruction technology, a current reconstruction technology and a hysteresis comparison technology.

Description

technical field [0001] The invention belongs to the technical field of DC motor control, and in particular relates to a DC motor parallel control system and a current following control method. Background technique [0002] Motor energy consumption currently accounts for a relatively high proportion of global electricity consumption. For motor control systems, the energy consumption of the motor depends on the motor and transmission efficiency. Therefore, people have been constantly exploring and striving to reduce the consumption of the motor, improve the transmission efficiency and improve the performance. Therefore, the motor system needs a more efficient control design. For modern powertrains, control accuracy, scalability, peripheral control, system data and design security, functional safety and reliability are all key points in the design. In addition, without affecting the control performance, the motor can achieve precise control and synchronous control, which is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P5/68H02P7/28
CPCH02P5/68H02P7/2815
Inventor 李伟华王炜罗黎明赵国璋马义波董建威赵宇
Owner SUZHOU BONRAY MEASURE & CONTROL EQUIP
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