What is the frequency converter in PLC
Release time:
2023-11-21
In the PLC (programmable logic controller) system, the frequency converter is a very important equipment, which is used to change the speed and torque of the AC motor, so as to realize the precise control of the motor speed. The frequency converter changes the speed of the motor by adjusting the frequency of the power supply, which makes the PLC system more flexible to control the operation of the motor.
In the PLC (programmable logic controller) system, the frequency converter is a very important equipment, which is used to change the speed and torque of the AC motor, so as to realize the precise control of the motor speed. The frequency converter changes the speed of the motor by adjusting the frequency of the power supply, which makes the PLC system more flexible to control the operation of the motor.
Inverter in the PLC system is widely used, such as in industrial automation, machinery and equipment, transportation and other fields have a wide range of applications. Through the combination of PLC and frequency converter, various complex control logic can be realized, for example, the speed and temperature of the motor are detected by sensors, and then the precise control of the motor is realized by the cooperation of PLC and frequency converter.
There are many types of frequency converters, which can be divided into AC-DC converter and AC-AC converter according to the conversion link. The AC-DC-AC inverter is the most commonly used inverter, which first converts alternating current into direct current through the rectifier, and then into alternating current through the inverter, so as to realize the precise control of the motor speed.
The main components of the inverter include rectifier, filter, inverter and controller. The function of the rectifier is to turn alternating current into direct current, the function of the filter is to eliminate high-order harmonics, the function of the inverter is to turn direct current into alternating current, and the controller is to control the speed and torque of the motor and other parameters.
In short, in the PLC system, the frequency converter is a very important part. It can realize the precise control of the motor speed by adjusting the power frequency, which makes the PLC system more flexible and efficient.
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