A permanent magnet synchronous motor driver protection circuit with real-time self-test function

Abstract

The invention relates to a permanent magnet synchronous motor driver protection circuit with a real-time self-test function, belonging to the technical field of driving protection circuits, which solves the problems of low reliability and high cost of the existing permanent magnet synchronous motor control circuit. Comprises a resistance-capacitance circuit, a logic circuit and a driving signal cutting circuit; The resistance-capacitance circuit adjusts the input motor position sensor signal, generates the conditioning signal and outputs it to the logic circuit. The logic circuit generates a logic signal according to the input conditioning signal and outputs the logic signal to the driving signal cutting circuit. The drive signal cutting circuit is connected with the driver main control chip and judges whether to cut off the motor drive signal according to the received logic signal. The invention does not need software, avoids complex software control algorithm, and reduces circuit cost. The resistance-capacitance circuit and logic circuit are used to monitor the position sensor signal in real time, and the driving signal cut-off circuit is used to cut off the driving signal of themotor, so as to protect the motor and the driver from damage and improve the reliability.

Description

technical field [0001] The invention relates to the technical field of drive protection circuits, in particular to a permanent magnet synchronous motor driver protection circuit with a real-time self-test function. Background technique [0002] The permanent magnet synchronous motor has the advantages of simple structure, reliable operation, small size, light weight, low loss, high efficiency, and the shape and size of the motor can be flexible and diverse. At present, permanent magnet motors are widely used in industrial and agricultural production, aerospace and daily life, and the output has increased sharply. With the continuous improvement of the performance of permanent magnet materials and the performance-price ratio of power electronic devices, the application of permanent magnet synchronous motors has become more and more extensive. High reliability and low-cost drive hardware protection circuits have become the key to the development of permanent magnet synchronous...

AI Technical Summary

Problems solved by technology

[0004] In view of the above analysis, the present invention aims to provide a permanent magnet synchronous motor driver protection circuit with real-time self-test function to solve the problems of low reliability and high cost of the existing permanent magnet synchronous motor control circuit

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