Two-phase stepping motor driving circuit and motor fault detection method

Abstract

The invention discloses a two-phase stepping motor driving circuit and a motor fault detection method. The two-phase stepping motor driving circuit comprises a field programmable gate array (FPGA) control circuit, a driver connected with a stepping motor, and a detection circuit, wherein the detection circuit is connected with the stepping motor and the FPGA control circuit; the driver is connected with the FPGA control circuit; the detection circuit detects current frequency of the winding of the stepping motor; a detected signal is fed back to the FPGA control circuit; and the FPGA control circuit judges whether the stepping motor fails in running. The two-phase stepping motor driving circuit has the advantages that under the condition that an encoder and a position sensor are not used, whether the stepping motor fails in running can be judged by calculating the current frequency of the winding of the stepping motor and comparing the current frequency with preset frequency; under the condition of open loop control, the stepping motor is subjected to real-time failure detection; and the circuit is simple, and the cost is low.

Description

technical field [0001] The invention relates to a stepping motor, in particular to a two-phase stepping motor drive circuit and a motor fault detection method. Background technique [0002] As an actuator, stepping motors are widely used in various automation control systems. Due to their own characteristics, stepping motors will cause serious step loss or even stalling once the load suddenly changes or resonance occurs during operation. Phenomenon, if such a situation occurs, the stepper motor needs to stop running immediately to avoid more serious consequences. [0003] Considering the operating characteristics of the stepping motor and considering the cost, the stepping motor usually adopts an open-loop control method, which makes it impossible to detect the above problems in real time. Adding a feedback loop composed of an encoder or a position sensor can realize real-time fault detection, but the installation of the encoder or position sensor is complicated and costly...

AI Technical Summary

Problems solved by technology

[0003] Combined with the operating characteristics of the stepping motor and considering the cost, the stepping motor usually adopts an open-loop control method, which makes it impossible to detect the above problems in real time

Adding a feedback loop composed of encoders or position sensors, although real-time fault detection can be achieved, but the installation of encoders or position sensors is complicated and costly, which is not an ideal solution

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