Advantages and differences between frequency converter and Servo system
Advantages and differences between frequency converter and Servo system
Frequency converter and Servo system are the two most important motor control methods at present, and they are also widely used in factories. Do you know how to apply their advantages?
Ordinary motor control system: This is the contactor control motor, start and stop forward and reverse star angle start, etc., this method is also very rough to use, it is impossible to use the motor torque at all, and can not debug the speed. It is only suitable For some very simple occasions, it is possible to increase its applicability by adding electric devices such as pot thermal relay, soft start, etc., but it is still a very low-level way.
Frequency converter: This is a common method of heterogeneous motors in factories. It is composed of frequency converter and motor, and is composed of rectifier filter inverter unit drive unit and so on. Its main principle is that some actual power frequency electricity is converted into the voltage required by the motor, which will achieve some energy-saving speed-regulating drilling tools, etc., and has a good protection function for the motor. If it is overloaded, it will alarm. There will be alarms for over-current, and over-voltage alarms.
The above two functions are mainly controlled by V/F. So this kind of applicable occasion is very wide, and its price is much cheaper than servo drive system, so some special motors can be used for frequency conversion, or general motors can be used for matching.
Servo system: It is a closed-loop controller that enables the position of the target unit to follow any changes in the control unit. In fact, its basic concept is very precise and fast positioning, so it is a very high-end Motor control mode. It is mainly composed of a servo drive and a dedicated motor, and its control ability is much higher than that of the frequency conversion. The master mainly relies on pulses for positioning, and also feeds back the number of pulses of the action to the servo drive, thus forming a very accurate closed-loop control system, and the servo motor will maintain the current position when there is no pulse input. Will not change. The Servo system produced by Jact can realize self-adjustment, making operation more convenient and more efficient.
In contrast, inverters and servo drives have the following two differences: the purpose is to save energy and protect the motor. The encoder can be used to achieve closed-loop control, but the accuracy is not high.
The main purpose of the latter is to achieve precise and rapid positioning, which can depend on the mechanical structure of the transmission part according to the actual situation, and the accuracy is very high. In the case of high-speed operation, it can still maintain a very high accuracy.