Servo Motor Requirements for the environment
In fact, we have always wanted to figure out the relationship between the stepper motor and the servo motor, the following Xiaobian to give you a good explanation on the stepper motor and servo motor related problems, together to see:
First, when the choice of DC servo system, it and AC servo What is the difference?
DC servo motor is divided into brush and brushless motor. Brush motor low cost, simple structure, large starting torque, wide speed range, easy control, the need for maintenance, but easy maintenance (for carbon brush), resulting in electromagnetic interference, the environment requirements. So it can be used for cost-sensitive general industrial and civilian applications.
Brushless motor small size, light weight, the output of large, fast response, high speed, inertia small, smooth rotation, torque stability. Control complex, easy to achieve intelligent, the electronic commutation way flexible, can be square wave commutation or sine wave commutation. Motor maintenance-free, high efficiency, low operating temperature, electromagnetic radiation is very small, long life, can be used for a variety of environments. AC servo motor is also brushless motor, divided into synchronous and asynchronous motor, the current motion control are generally used synchronous motor, its power range, you can do a lot of power. High inertia, the highest rotational speed is low, and with the power increases and quickly reduced. And thus suitable for low-speed smooth operation of the application.
Second, how to correctly select the servo motor and stepper motor?
Mainly depending on the specific application of the situation, simply to determine: the nature of the load (such as horizontal or vertical load, etc.), torque, inertia, speed, accuracy, acceleration and deceleration requirements, the upper control requirements (such as port interface and communication Aspects of the requirements), the main control mode is the location, torque or speed mode. Power supply is DC or AC power, or battery-powered, voltage range. According to which to determine the motor and equipped with the driver or controller model.
Third, 2-phase and 5-phase stepper motor What is the difference, how to choose?
2-phase motor cost is low, but the vibration at low speed, high speed torque quickly. 5-phase motor vibration is small, high-speed performance is better than the speed of 2-phase motor 30 to 50% higher, in some cases to replace the servo motor.