Stepper motor and servo motor identification method - Database & Sql Blog Articles

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The identification method of stepping motor and servo motor is as follows: Torque range: Stepping motor system is generally small and medium torque (generally below 40Nm); servo motor system can realize full range.
Speed ​​range: Stepper motor system speed is low (generally below 2000RPM, high torque motor is less than 1000RPM); servo motor system speed is high (AC servo can reach 5,000 RPM, DC servo motor can reach 10,000 to RPPM).
Control mode: The stepper motor system is mainly position control, and can also realize intelligent position/speed/torque control mode. There is vibration at low speed (but it can be obviously improved by using high-divided drive); closed-loop control of servo motor system, running smooth.
Accuracy: Stepper motor systems generally have lower accuracy and are higher when using high-resolution drivers; the accuracy of servo motor systems depends on the resolution of the feedback device.
Moment frequency characteristics: The stepping motor system has a fast torque drop at high speed; the servo motor system has good torque frequency characteristics and hard characteristics.
Overload characteristics: Stepper motor system will lose step when overloaded; servo motor system can withstand 3~10 times overload for a short time.
Feedback mode: Most of the stepper motor system is open-loop control, and can also be connected to the encoder feedback to prevent out-of-step; the servo motor system is closed-loop mode and encoder feedback.
Encoder type: Stepper motor system does not use encoder when open loop control; servo motor system generally adopts photoelectric type rotary encoder (incremental/absolute value type), rotary transformer type.
Response speed: The corresponding speed of the stepper motor system is general; the servo motor system has a corresponding speed.
Vibration resistance: The stepper motor system is resistant to vibration; the servo motor system is generally resistant to vibration (the rotary transformer type is resistant to vibration).
Temperature rise: The stepper motor system has a higher temperature rise; the servo motor system is generally.
Maintenance: The stepper motor system can be basically maintenance-free; the servo motor system has good maintainability.
Price: The price of the stepper motor system is low; the price of the servo motor system is high.