Dual-motor propulsion system and control method

Abstract

The invention discloses a dual-motor propulsion system and a control method thereof. The method comprises the steps that a main motor controller communicates with the outside to receive a rotating speed instruction and feeds back state information of a motor to the outside; a rotating speed instruction is received from the motor controller and external communication, and state information of the motor is fed back to the outside; wherein the rotating speed instruction comprises a main rotating speed instruction of a main motor and a slave rotating speed instruction of a slave motor; the mastermotor controller and the slave motor controller are in internal communication to transmit data to each other. According to the control method of the dual-motor propulsion system, the dual motors can be effectively controlled to output the rotating speed and the torque in a balanced mode according to the rotating speed instruction and the propeller load, the system has the advantage of being good in fault tolerance based on cooperative control and redundancy design, and it can be guaranteed that the whole motor system can continue to work when part of faults occur.

Description

technical field [0001] The invention relates to the technical field of aircraft, in particular to a dual-motor propulsion system and a control method. Background technique [0002] The propulsion systems of electric aircraft, solar-powered drones, and stratospheric airships use electric motors to drive propellers to generate propulsion. The propulsion system includes a motor device and a propeller, and the motor device is composed of an electric motor and a motor controller, which is the core component of the propulsion system. Due to the limitation of battery energy density and the requirement of long-duration flight, the electric motor device needs to have the technical characteristics of high power-to-weight ratio, high efficiency, high fault tolerance and good consistency of dual-motor cooperative work. [0003] The existing electric propulsion schemes for high-altitude aircraft are mainly distributed brushless DC motor schemes with position sensors. Multiple electric m...

AI Technical Summary

Problems solved by technology

[0003] The existing electric propulsion schemes for high-altitude aircraft are mainly distributed brushless DC motor schemes with position sensors. Multiple electric motor devices are distributed on the wings or nose and tail. It also brings problems of reliability and power-to-weight ratio, and the square wave control method of brushless DC motors brings about the problems of reduced efficiency of the entire system and problems of torque ripple

In addition, the consistency of the double motors (also called dual motors, including the main motor and the slave motor, which can also be called the master motor and the slave motor) is also a difficulty in the existing technology. flow protection

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