DSP (digital signal processor)-based stepper motor control system

Abstract

The invention discloses a DSP (digital signal processor)-based stepper motor control system. The DSP-based stepper motor control system comprises a DSP control module, a power supply module, a motor driving module, a current detection module, a speed measurement module, a touch screen display module, an alarming module and a two-phase four-wire-system stepper motor. The DSP control module is used ,as a control center, to mainly generate the forth PWM signals and control the rotation speed and rotation direction of the stepper motor; the current detection module is used for detecting current flowing by a motor driving chip, the speed measurement module is used for detecting the rotation speed and rotation direction of the stepper motor and displaying the detected rotation speed and rotation direction of the stepper motor by virtue of touch screen, and a touch key is set by virtue of the touch screen module; the acoustic-optical alarming module is mainly used for receiving a signal from the DSP and issuing an alarm when the current flowing by the motor driving chip and detected by the current detection module exceeds a rated range. By adopting the system, the peripheral circuit is simplified, so that the stepper motor is high in response speed, high in precision, small in output torque pulse, more accurate in speed measurement; moreover, the expandability of the system is greatly improved.

Description

technical field [0001] The invention belongs to the field of motor control systems, in particular to a DSP-based stepping motor control system. Background technique [0002] A stepper motor is a control element that converts electrical pulse signals into angular displacement or linear displacement. The stepper motor has high position positioning and speed control precision, sensitive action, open-loop control positioning does not rely on sensors, high torque, high reliability, and high power at medium and low speeds. With the rapid development of electronic technology, stepping motors Stepper motors are widely used in CNC machine tools, computing devices, automatic recorders, plotters, industrial robots, non-destructive testing and other systems and devices, and the stepper motor control system determines the performance of stepper motors to a large extent. With the development of computer technology and microelectronics, the demand for stepper motors is gradually increasin...

AI Technical Summary

Problems solved by technology

[0003] At present, the core of the control system of the stepper motor mostly uses a single-chip microcomputer, and the display module often uses a digital tube or LCD, which leads to more complex peripheral circuits of the system, poor fast and high-precision processing capabilities of the chip, inaccurate speed measurement, and the output of the stepper motor. Torque ripple is relatively large, and the system scalability is poor, etc.

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