A fault-tolerant system and control method for parallel motors

Abstract

The invention discloses a parallel motor fault-tolerant system and control method, including a first DC motor, a second DC motor, a first inverter working bridge arm, a second inverter working bridge arm and a third inverter working bridge arm; the positive pole of the first DC motor is connected to the bridge arm of the first inverter, and the negative pole is connected to the bridge arm of the third inverter; the positive pole of the second DC motor is connected to the bridge arm of the second inverter, and the negative pole is connected to the bridge arm of the third inverter The bridge arms of the inverter are connected; the present invention reduces the number of working bridge arms of the inverter and reduces the cost of system components by adopting the mode that two DC motors share one inverter working bridge arm in the dual DC motor control system; When a motor fails, the control strategy of the fault-tolerant control system can be adjusted by changing the topology of the fault-tolerant control system, so that the motor system can still operate continuously and reliably under the new topology, effectively ensuring the stability of industrial production. Ongoing reliability.

Description

technical field [0001] The invention relates to the field of motor system and control technology, in particular to a parallel motor fault-tolerant system and control method. Background technique [0002] DC motors are widely used in the fields of aerospace and enterprise production. In order to prevent the failure of hardware circuits and cause the system to fail to work normally, the fault-tolerant control system of the motor system has become a key research direction of scholars at home and abroad. The principle of the fault-tolerant control system is: when the equipment fails, according to the detected fault information, according to different fault reasons, take corresponding fault-tolerant control measures to ensure the normal operation of the system. Fault-tolerant control systems are generally divided into two categories: passive fault-tolerant control and active fault-tolerant control. [0003] In current industrial production, in order to achieve fault tolerance, t...

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Problems solved by technology

[0007] Aiming at the technical problems existing in the prior art, the object of the present invention is to provide a parallel motor fault-tolerant system and control method to ensure that the double DC motor parallel system has the ability to work stably when the equipment fails, so as to solve the existing The comprehensive redundancy method has the technical problems of high maintenance cost and waste of resources

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