What role can the current sensor play in the operation of the frequency converter?

What role can the current sensor play in the operation of the frequency converter?

With the continuous development of power electronics technology and the continuous improvement of motor operation and control technology, the development of power transmission system and production process makes the frequency converter has been widely used. Frequency converter as the main control motor speed and motor electromagnetic torque hardware, not only through the output of different frequency voltage to control the motor speed, but also able to control the motor's output electromagnetic torque, so that the motor works more efficiently and accurately, in terms of energy saving and environmental protection, also has an important role in reducing energy consumption and reducing pollution. And inverter operation process current sensor also plays a very important role.

1. Measurement of motor current

In the inverter control motor operation, the main role of the current sensor is to measure the motor current size, even if the inverter can output suitable for a variety of motor output torque and achieve the required efficiency. The current sensor is one of the core components to realize the control of frequency converter: through the sensor to sense the current size of the motor, the frequency converter can be converted into the motor output torque through appropriate algorithms in the computer, so as to realize the speed and torque control of the motor.

2. Protection of motor safety

The current sensor can also protect the safety of the motor, once the motor internal abnormalities, such as short-circuit, phase failure and other phenomena, the current sensor will generate feedback signals through the sensor to these abnormalities back to the inverter, so that it stops running to protect the safe operation of the motor.

3. Monitoring motor status

The current sensor is also able to monitor the motor's operating status, based on the collected current data information, the motor's operating status can be displayed through the frequency converter, and provide an alarm function, which can automatically detect the abnormal state of the motor in the motor running process, and remind the operator to repair in a timely manner to ensure the normal and stable operation of the motor and prolong the service life of the motor.

Conclusion

As one of the core components of the inverter, the current sensor is an important part of realizing the speed and torque control of the inverter motor, guaranteeing the safety of the motor, and monitoring the status of the motor, and it plays an important role in the control of the motor, the protection of the electric power transmission and the maintenance and repair. Therefore, when selecting the current sensor, it should be selected in strict accordance with the rated parametersof the motor, to ensure that the current sensor is used in conjunction with the motor, to improve the accuracy of the motor's work and the efficiency of the output, to extend the service life of the motor, and to make a great contribution to the economic benefits of the enterprise, to improve the efficiency of production and the level of technology.