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Five-direct-current-motor series-connection direct torque fault-tolerant control method and system

A DC motor, fault-tolerant control technology, applied in the control of the speed or torque of the motor, the control system, the speed adjustment of multiple motors, etc., can solve the problems of not being able to stop immediately for maintenance, large mechanical noise, and inability to meet requirements.

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

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Problems solved by technology

[0002] With the progress and development of production technology, the control system of DC motors has ushered in new challenges and opportunities. At the same time, the requirements for driving devices in various industries are getting higher and higher. It runs continuously and cannot be shut down for maintenance immediately
However, due to the many shortcomings of the power electronic device itself, when the motor fails, the output torque will pulsate due to the asymmetric operation of the motor, resulting in large mechanical noise
[0003] The control strategy of the traditional DC motor series system, once a failure occurs, means that the entire speed control system loses the ability to operate, which can no longer meet the requirements in industrial production

Method used

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Embodiment Construction

[0063] 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.

[0064] see figure 1 , the present invention provides a direct torque fault-tolerant control system of five DC motors in series, including five PI controllers, a reference torque calculation module, a hysteresis control module, a PWM pulse width modulation module, an actual torque calculation module, and a fault detection And fault-...

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Abstract

The invention discloses a five-direct-current-motor series-connection direct torque fault-tolerant control method and system. The method is characterized in that five direct-current motors connected in series are connected with corresponding PI controllers through corresponding position sensors and actual rotating speed calculation modules respectively, the five PI controllers are connected with aPWM pulse width modulation module through a reference torque calculation module and a hysteresis control module, the five series-connection direct current motors are connected with a hysteresis control module through an actual torque calculation module and a fault detection and fault-tolerant control strategy module, a PWM module is connected with the five series-connection direct current motorsthrough a six-phase voltage inverter and is for direct torque fault-tolerant control. The method is advantaged in that the method makes it possible to improve security and reliability of a complex system.

Description

technical field [0001] The invention belongs to the technical field of multi-DC motor control, and in particular relates to a direct torque fault-tolerant control method and system of five DC motors connected in series. Background technique [0002] With the progress and development of production technology, the control system of DC motors has ushered in new challenges and opportunities. At the same time, the requirements for driving devices in various industries are getting higher and higher. It runs continuously and cannot be shut down for maintenance immediately. However, due to the many shortcomings of the power electronic device itself, when the motor fails, the output torque will pulsate due to the asymmetric operation of the motor, resulting in large mechanical noise. [0003] Once the control strategy of the traditional DC motor series system fails, it means that the entire speed control system will lose its ability to operate, which can no longer meet the requireme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P5/685H02P5/46H02P5/50
CPCH02P5/46H02P5/50H02P5/685
Inventor 林海李超杰左磊杨盼盼
Owner CHANGAN UNIV
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