Servo drive, also known as “servo amplifier”, “servo controller”, is used to control the servo motor is a controller, belongs to the servo system part of its role is similar to the role of the inverter in the ordinary AC motor, mainly used in high-precision Positioning system. Generally through the position, speed and torque of the three ways to control the servo motor, to achieve high-precision positioning of the drive system, now is the high-end products of the drive technology. Servo drives are widely used in the field of injection molding machines, textile machinery and other fields.
When the motor in the deceleration movement state, the motor plays the role of the engine, hindering the change of its own movement form, so it will produce a reverse electromotive force, the electromotive force will be superimposed on the DC bus voltage of the drive, which is easy to make the bus voltage too high.
The role of the braking resistor is to consume the kinetic and magnetic energy of the motor, making the motor quickly stop braking, when the DC bus side voltage is higher than a certain value, that is, open the braking circuit.
