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Multi-direct-current motor parallel fault-tolerant system and fault-tolerant control method

A fault-tolerant control and fault-tolerant system technology, applied in the direction of DC motor speed/torque control, control of multiple DC motors, and speed regulation of multiple motors, which can solve problems such as industrial productivity decline

Active Publication Date: 2020-07-28
CHANGAN UNIV
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Problems solved by technology

Since various faults will occur during the operation of the motor, resulting in a decline in industrial productivity, the fault-tolerant control of multi-motor coordination has become an important research content

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 2 , the present invention provides a multi-DC motor parallel fault-tolerant system, including n PI controllers, reference current calculation units, (n+1) current hysteresis comparison controllers, PWM pulse generation units, (n+1) phase A voltage source inverter, n parallel DC motors and a motor fault detection ...

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Abstract

The invention discloses a multi-direct-current motor parallel fault-tolerant system and a fault-tolerant control method. The speed obtained by a position sensor under the action of a rotating speed calculation unit is fed back to a speed regulation module, and the current value obtained by a current detection sensor through a current calculation unit under the action of a motor fault detection signal is fed back to a current regulation module; a speed error obtained from a reference speed signal and a feedback speed signal under the action of a speed comparator is processed through a PI controller to obtain a current; a reference current is obtained under the action of a motor fault detection signal; a current value of the motor current signal is obtained under the action of the motor fault detection signal; a current error is obtained from the reference current and the current under the action of a current comparator, and a duty ratio is obtained through a hysteresis control comparator; and a PWM pulse generation unit obtains an on-off pulse control signal for controlling a switching tube in an (n+1) phase inverter. The method is advantaged in that efficient and stable operation of the motor is ensured, and industrial production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of motor control, and in particular relates to a multi-DC motor parallel fault-tolerant system and a fault-tolerant control method. Background technique [0002] In order to improve industrial production efficiency and reduce energy consumption, the idea of ​​multi-motor cooperative work is proposed. Since various faults will occur during the operation of the motor, resulting in a decline in industrial productivity, the fault-tolerant control of multi-motor coordination has become an important research content. The present invention is based on PI controller, PWM pulse unit, inverter, etc. In order to ensure the safe, stable and continuous operation of the motor and speed up the production progress of the product, a fault-tolerant control scheme is designed when the motor fails. This scheme can reduce the error with the expected value, Realize the stable operation of the motor and ensure the reliability of ...

Claims

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Application Information

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IPC IPC(8): H02P5/46H02P5/50H02P5/68H02P7/281
CPCH02P5/46H02P5/50H02P5/68H02P7/281H02P7/2815
Inventor 林海刘家毓杨盼盼左磊
Owner CHANGAN UNIV
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