DVUS940L

DVUS940L Application Field and Working Principle

DVUS940L is a type of motor driver board, module, designed to precisely control the speed of stepper motors. It is typically used in various CNC machines, printers, and high-accuracy robotics applications. It accepts differential or single-ended signal inputs for forward/reverse motion control and high torque stepping.

Features and Benefits

• Small size, suitable for compact applications
• High efficiency stepping accuracy (>95%)
• High motor reactivity and low noise operation
• Thermal protection via thermal sensor
• Wide operational voltage range (5 VDC to 40 VDC)

Application Field

The DVUS940L is ideal for use in CNC machines, printers, and other robotics applications requiring precise positioning. It is commonly used to drive two-phase hybrid stepper motors and allows for direct torque and velocity control. The integrated thermal protection makes it especially suited for long-term operation with low heat dissipation.

Working Principle

The DVUS940L uses pulse-width modulation (PWM) control to drive two-phase hybrid stepper motors. It contains two closely coupled comparators to perform the pulsewidth control operation. The upper comparator is used to control the stepper motor current by sampling the measurement of the pulsewidth. The lower comparator controls the voltage level at the motor output by comparing the pulsewidth generated by the upper comparator with a reference pulsewidth.

The pulsewidth control ensures that the current supplied to the motor is kept within a predetermined range. The lower comparator monitors the voltage at the motor terminals and limits the output current in order to prevent overheating of the stepper motor. This allows for precise control of the speed, acceleration, and torque of the motor.

Conclusion

The DVUS940L motor driver board, module, is a compact and highly efficient solution for controlling the speed and torque of two-phase hybrid stepper motors. It is well-suited for applications such as CNC machines, printers, and robotics that require precise positioning. Its high efficiency stepping accuracy and integrated thermal protection make it a reliable solution for long-term operation with low heat dissipation.