In the specific application, when the terminal load is stable, the action is simple, and the operation is basically low speed, the stepping motor with low cost and easy control is most suitable; but when the terminal load fluctuation range is large, the action is simple, and the operation is basically low speed, If you choose a stepper motor, you will face a series of troubles, because the stepper motor driven by square wave is difficult to eliminate vibration and noise, and will cause out-of-step or overshoot due to torque fluctuation. In fact, when the terminal load fluctuation range is large, even if it is basically a low-speed operation state, the servo motor should be selected. After considering factors such as efficiency improvement factors, energy saving factors, control accuracy improvement factors, and system stability increase, it will be found. The use of higher-priced servo motors has increased the overall cost.
What should you pay attention to when replacing a stepper motor with a servo motor?
1. In order to ensure that the control system does not change much, the digital servo system should be used, and the original pulse control mode can still be used;
2. Due to the strong overload capability of the servo motor, the rated torque of the servo motor can be determined by referring to 1/3 of the rated output torque of the original stepping motor;
3. Because the rated speed of the servo motor is much higher than that of the stepper motor, it is better to increase the speed reducer to make the servo motor work close to the rated speed.
This also allows you to choose a smaller power motor to reduce costs.
The current performance of servo motors tends to be stepped:
1, small volume and high efficiency: the use of the latest permanent magnet materials and optimized motor design, so that smaller motors can also produce a large torque. When the same type of motor is matched with different drives, the maximum output torque is different; when the same volume of motor adopts different winding forms and different magnetic pole numbers, the output power is different;
2, impact resistance torque: the maximum torque can reach several times the rated torque;
3, using high-performance magnetic materials, high magnetic energy product;
4. Temperature monitors are available on both the motor and the drive. Stepper motor, stepper motor driver, brushless motor, brushless motor driver.
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