What is the difference between the stepper motor driver and the servo motor driver?
Stepper motor is the electric pulse signal into angular displacement or linear displacement of the open-loop control element of stepper motor, in the case of non overloaded, the motor speed and stop position depends only on the pulse frequency and pulse number, regardless of load changes, when the stepper drive the processor receives a pulse signal, it drives stepper motor, set the direction of rotation of a fixed angle called the step angle, it is the rotation of the fixed point of the operation step by step. Number of pulses can be controlled by controlling the angular displacement, so as to achieve the purpose of accurate positioning, also can control the pulse frequency to control the motor rotation speed and acceleration, so as to achieve the purpose of speed.
Servo motors, also known as executive motors, are used as actuators in automatic control systems to convert received electrical signals to angular displacement or angular velocity output on the motor shaft. Servo motor rotor is permanent magnet drive control of the U/V/W three-phase power electromagnetic fields, the rotation of the rotor in the magnetic field, and the motor with encoder feedback signal to the drive, the drive according to the feedback value is compared with the target value, the rotating rotor angle adjustment. The servo motor precision depends on the precision of encoder (line number) is a servo motor itself with pulse function, it rotates an angle, will emit pulses corresponding to the number of such servo driver and servo motor encoder pulse forming the echo, so it is a closed loop control, stepper motor drive loop control.
