How to use a simple method to adjust the power of

How to use a simple method to adjust the rotation direction of the two-phase stepping motor after it is powered on

about the subdivision principle of the driver and some related instructions, the hydraulic technology is developing rapidly abroad. For the stepping system, the two-phase hybrid stepping motor and the corresponding subdivision driver are mainly used. However, in China, the majority of users do not have a special understanding of subdivision. Some just think that subdivision is to improve the accuracy, but in fact it is not. Subdivision is mainly to improve the operating performance of the motor. Now it is explained as follows: the subdivision control of the stepping motor is realized by the driver accurately controlling the phase current of the stepping motor. Taking the two-phase motor as an example, if the rated phase current of the motor is 3a, If a conventional driver (such as the commonly used constant current chopping method) is used to drive the motor after the first experiment, the current in the winding of the motor will suddenly change from 0 to 3A or from 3a to 0 every step of operation. The huge change of phase current will inevitably cause the vibration and noise of motor operation. If a subdivision driver is used to drive the motor in the state of 10 subdivisions, the current change in the winding of the motor is only 0.3A instead of 3A every microstep of operation, and the current changes in a sinusoidal law, which greatly improves the vibration of the motor

motion and noise, therefore, the real advantage of subdivision is the advantage of performance. Since Zhejiang University, shanghaijiaotonguniversity, Sichuan University, Fudan University and Tsinghua University are among the top 10 in terms of subdivision, the driver needs to accurately control the phase current of the motor, so there are quite high technical and process requirements for the driver, and the cost will also be high. Note that some domestic drivers use smoothing to replace subdivision, and some are also called subdivision, but this is not a real subdivision. I hope users must distinguish the essential differences between the two:

1 Smoothing does not accurately control the phase current of the motor, but only slows down the change rate of the current, so smoothing does not produce micro steps, and the subdivided micro steps can be used for accurate positioning

2. After the phase current of the motor is smoothed, it will cause the motor torque to decrease, and the subdivision control will not cause the motor torque to decrease, on the contrary, the torque will increase