At present, the types of motors used in fast doors on the market are uneven, which makes it difficult for some companies that are new to fast doors to choose. So today I will compare the more common servo motors on the market with stepper motors and take a look. Why should the fast door be matched with a servo motor instead of a stepper motor.
Stepping motors are prone to low-frequency vibration at low speeds.
The servo motor has the characteristics of stable operation, and there will be no vibration even at low speed.
The output torque of a stepping motor decreases with the increase of the speed, and will drop sharply at a higher speed. The maximum working speed is generally 300 to 600 rpm.
The servo motor is a constant torque output, that is, it can output a rated torque within its rated speed (generally 2000rpm or 3000rpm), and it is a constant power output above the rated speed.
Stepper motors generally do not have overload capacity.
The servo motor has a strong overload capacity.
Stepper motor control is open-loop control. If the starting frequency is too high or the load is too large, it is easy to lose steps or stall. When the speed is too high, it is easy to overshoot. Therefore, in order to ensure its control accuracy, it should be handled well. Speed up and down issues.
The servo drive system is a closed-loop control. The drive can directly sample the feedback signal of the motor encoder. The position loop and speed loop are formed inside. Generally, the stepper motor will not lose steps or overshoot, and the control performance is more reliable.
It takes 200 to 400 milliseconds for a stepping motor to accelerate from a standstill to a working speed (generally several hundred revolutions per minute).
The acceleration performance of the servo system is better. It only takes a few ms to accelerate from a standstill to its rated speed of 3000 r/min, which is more suitable for rapid start and stop.
It can be seen that the servo motor has fast control speed, accurate position accuracy, small electromechanical time constant and high linearity. It can convert the received electrical signal into angular displacement or angular velocity output on the motor shaft. Therefore, it is very suitable to match the servo motor, which can improve the performance of the fast door again. The whole series of fast door products of Suzhou fast door manufacturer SEPPES Door Industry are equipped with servo motors, which are safe, stable and fast. They have reached cooperation with many companies and are the choice of the world’s top 500 companies.
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E-mail: dongm@seppes.com.cn
