Control system of redundant high voltage permanent magnet brushless direct current motor

Abstract

The invention discloses a control system of a redundant high voltage permanent magnet brushless direct current motor. The control system sends a multi-path PWM pulse with the same number of paths as that of the redundancy into a drive circuit; the drive circuit adopts a plurality sets of completely symmetrical three-phase full-bridge circuits and is connected with the three-phase of U, V and W of the motor to drive the motor; a detection circuit comprises a plurality sets of position detection circuits and sends a Hall position sensor signal of the motor to a DSP (Digital Signal Processor); and a detection protective circuit respectively comprises a plurality of voltage detection protective circuits and current detection protective circuits with the same number of sets as that of the redundancy, detects the current value and the voltage value loaded on the motor in real time, and sends the current value and the voltage value to the DSP. Once failures, such as, short circuit or open circuit, and the like of the motor occur, the DSP automatically cuts off the control signal of the path, gives an alarm signal and ensures the normal running of other redundancies. The invention ensures the reliability of the system, effectively lightens the volume weight of the system and reduces the cost.

Description

technical field [0001] The invention relates to a control system of a brushless direct current motor, in particular to a control system of a redundant high voltage permanent magnet brushless direct current motor. Background technique [0002] With the rapid development of more electric aircraft, replacing complex hydraulic and pneumatic systems with electric drive systems will be the future development direction. The main power supply system of modern aircraft has mainly experienced four development processes: low-voltage DC power supply, constant-speed and constant-frequency AC power supply, variable-speed and constant-frequency AC power supply, and high-voltage DC power supply. The 270V high-voltage DC power supply has the advantages of light weight, high efficiency, and easier realization of uninterrupted power supply, and has been applied in some advanced foreign aircraft. With the rapid development of power electronics technology and new rare earth materials, rare eart...

AI Technical Summary

Problems solved by technology

In the relevant papers searched, some scholars have conducted research on the dual-redundancy brushless DC motor control system, and it is generally low-voltage, but in the flight control system, the double-redundancy cannot meet the system requirements, and the redundant degree is generally used control system; the dual-redundancy control system manages and controls the motor through two independent channels, and the fault can only be judged manually; while the redundancy control system needs to manage and control multiple channels, and each channel needs to be With communication function, fault judgment is judged by voting system

As for the redundant high-voltage permanent magnet brushless DC motor control system, no relevant literature was retrieved

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