How the servo driver works
The input signal of the driver is the switch signal, from the operating panel, the encoder. The output signal is the digital pulse to the motor
Servo drives, servo drives) is also known as "servo controller" and "servo amplifier, a controller is used to control the servo motor, its action is similar to the frequency converter to ordinary ac motor, belong to the part of the servo system, mainly used in high precision positioning system. Typically by location, speed and torque three ways to control the servo motor, high precision positioning of transmission system, is currently the transmission technology of high-end products. Working principle: The current mainstream servo drive adopts digital signal processor (DSP) as the control core, can realize more complex control algorithm, realize digitization, networking and intelligence. Power devices are widely used in intelligent power module (IPM) as the core design of drive circuit, IPM internal integrated drive circuit, at the same time has the overvoltage, overcurrent, overheating, under-voltage protection circuit, such as fault detection in the primary loop to join the soft start circuit, to reduce the impact to drive during startup. The power drive unit is the first through the three-phase full bridge rectifier circuit to the input three phase electricity or the municipal electricity to complete the rectifier, the corresponding direct current electricity. The three phase permanent magnet synchronous ac servo motor is driven by a three-phase sinusoidal PWM voltage inverter. The whole process of the power drive unit can be simply described as the ac-dc-ac process. The main topological circuit of the rectifier unit (ac-dc) is a three-phase fully bridge uncharged rectifier circuit.
Advantages of servo to the system:1, the speed of adjustment is wide High positioning accuracy Have enough transmission rigidity and high speed stability Quick response, no overtones In order to guarantee the quality, productivity, and in addition to require a higher positioning accuracy, also requires good fast response characteristics, which requires command signal tracking response is faster, because the numerical control system at the time of starting, braking and acceleration for addition, subtraction is large enough to shorten the transition time of feeding system, reduce the contour error of transition. Low speed torque, overload ability Generally speaking, the servo actuator is more than 1.5 times the overload capacity in minutes or even half an hour, and can be over 4 ~ 6 times over in a short period of time without damage. High reliability Requirements of nc machine tool feed drive system, high reliability, good stability and strong environmental adaptation, such as temperature, humidity, vibration, and strong anti-interference ability.
The input signal of the servo driver is the switch signal, from the operating panel, the encoder. The output signal is the digital pulse to the motor, which makes the motor perform the relevant action. Maximum output torque setting Set the internal torque limit of the servo driver. Setting the value is the percentage of the rated torque, and at any time, the limit will be able to locate the range of the target within the range set position control. This parameter provides the position control mode the drive determine whether complete positioning basis, while the rest of the position deviation in the counter pulse number less than or equal to the parameters setting, drive think positioning has been completed, in place to ON switch signal, otherwise to OFF. When in position control mode, the output signal position location is complete, the setting of the deceleration time constant is said motor from 0 to 2000 r/min of acceleration time or from 0 to 2000 r/min deceleration time. Deceleration feature was arriving linear speed range set speed in the position control mode, if the servo motor at a faster rate than the set value, the speed to switch signal to ON, otherwise to OFF. In position control mode, no such parameter is used. It has nothing to do with the rotation.
