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| 2024/06/03 13:56:23瀏覽111｜回應0｜推薦0 | |
1.Definition
A stepper motor driver is an actuator that converts electrical pulses into angular displacement. A stepper motor and a stepper motor driver form a stepper motor drive system. The performance of a stepper motor drive system depends not only on the performance of the stepper motor itself, but also on the quality of the stepper motor driver. The research on stepper motor drivers is almost carried out simultaneously with the research on stepper motors.
2.The main structure of the stepper motor driver
 Circular distributor
Generate the switching waveform signal processing of the motor in different states according to the requirements of the input signal
PWM modulation of the switching signal waveform generated by the circular distributor and filtering and shaping of the related waveforms, driving stage: amplify the voltage and current of the switching signal to enhance the main switching circuit
Use power components to directly control the phase windings of the motor
Protection circuit
When the winding current is too large, a shutdown signal is generated to shut down the main circuit to protect the motor driver and motor windings
Sensor
Real-time monitoring of the position and angle of the motor, and the device that transmits the signal back
3.working principles
Its working principle can be summarized as the following steps:
Receive and process pulse signals: The stepper motor driver first receives pulse signals from the controller, which determine the rotation angle and speed of the stepper motor.
Convert current signals: The driver converts the received pulse signals into the current signals required by the stepper motor. In this process, the driver adjusts the output current size and direction according to the frequency and width of the pulse signal.
Drive the stepper motor: The converted current signal is transmitted to the stepper motor, thereby driving the motor to rotate a fixed angle (step angle) in the set direction. By continuously receiving and processing pulse signals, the stepper motor can achieve continuous rotation.
4.Summary
In general, the working principle of the stepper motor driver is to convert the pulse signal of the controller into the current signal required by the stepper motor, thereby driving the stepper motor to rotate a fixed angle in the set direction. This conversion process enables the stepper motor to accurately control the rotation angle and speed, and is widely used in various automation control systems.
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