A high-power dual-rotation brushless DC motor control system for underwater vehicles

Abstract

The invention relates to a high-power dual-rotor brushless direct current motor control system for an underwater navigation vehicle. A main controller receives position signals processed by an inner rotor hall position signal sampling circuit, an outer rotor hall position signal sampling circuit, an inner rotor hall position processing circuit and an outer rotor hall position signal processing circuit, and then performs phase-hanging control after calculating the turning angles of the inner rotor and the outer rotor to output six paths of driving signals, then performs PWM modulation on the six paths of the driving signals in an H-PWM-L-ON mode to input in a driving circuit; a driving fault detection circuit is used for monitoring an IGBT working state; an RCD absorbing circuit can protect the IGBT; a filtering decoupling circuit, a current detection and overcurrent protection circuit and a bus voltage detection circuit can realize real-time protection in the running process of the motor; and the control system communicates with a main control center of the underwater navigation vehicle through CAN and RS422 for receiving rotating speed, starting and halt instructions, and sending data of motor rotating speed, PWM duty ratio, motor current and the like. The high-power dual-rotor brushless direct current motor control system has the advantages of stable running, high real-time performance in speed adjusting, high response speed, high reliability and the like, and the high-power dual-rotor brushless direct current motor control system, already passing experimental verifications, can meet actual using demands of the underwater navigation vehicle.

Description

technical field [0001] The invention belongs to the control field of underwater vehicles and brushless DC motors, and relates to a high-power double-rotation brushless DC motor control system for underwater vehicles. Background technique [0002] As an autonomous underwater vehicle, autonomous underwater vehicles have the advantages of large diving depth, intelligence, and multi-purpose. play an extremely important role. [0003] High-power brushless DC motors have the advantages of high operating efficiency, good speed regulation performance, and high reliability. In many fields such as aviation, aerospace, and navigation, high-power brushless DC motors can be used as propulsion actuators. The high-power double-rotation brushless DC motor is designed based on the principle of action force and reaction force. Under the promotion of electromagnetic torque, the inner and outer rotors rotate in opposite directions at the same time. This double-rotation brushless DC motor is m...

AI Technical Summary

Problems solved by technology

[0004] Due to the high-power double-rotation brushless DC motor, both the inner and outer rotors are rotating, the rated current is relatively high, the rated speed is high, and the rated torque is relatively large, the system operation is more complicated, and the motor commutation control, torque suppression and current detection and control are added. The difficulty of overcurrent protection also puts forward higher requirements for the stability, control effect, response speed and service life of the entire motor control system

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