Inverter brand: Inverter refers to an electric energy converter that changes the frequency associated with electric energy (except zero frequency). It is mainly used in various large electrical equipment, but many people still don’t know what the function of the inverter is. The following is a detailed introduction by the staff of the relevant inverter brand.

1、 Function of frequency converter - Frequency conversion energy saving

The application of variable frequency energy saving in the fan and water pump industry is very obvious. Since the power consumption of fans and water pumps is proportional to the cube of the speed, when the external air/water consumption is not high, variable frequency speed regulation is adopted, and the energy saving effect is obvious. The energy saving principle of other industries may be the same. When full speed operation is not required, it can be achieved by reducing the motor speed.

2、 Inverter function - Soft start

Staff from relevant inverter brands said that when the motor is started directly through the industrial frequency, 7 to 8 times the rated current of the motor will be generated. This current value will increase the electrical stress of the motor winding and generate heat, thereby reducing the service life of the motor and having a great impact on the power grid. Variable frequency speed regulation can be started at zero speed and zero voltage (or appropriately increased). Once the relationship between frequency and voltage is established, the inverter can drive the load according to voltage/frequency or vector control. Variable frequency speed regulation can fully reduce the starting current, improve the carrying capacity of the winding, reduce the impact of the starting current on the motor and the power grid, and extend the service life of the motor. At the same time, it will not cause the problem of excessive peak-to-valley difference, causing voltage-sensitive equipment in the power supply network to trip or operate abnormally.

3、 Function of frequency converter - Simplification of control system

The staff of the relevant inverter brand said that the variable frequency speed regulation can start at zero speed, accelerate evenly according to the needs of the user, and can also select its acceleration curve. The running speed can be adjusted at any time according to the needs, and can be changed quickly according to the process flow. The speed regulation can be achieved through remote control PLC or other controllers.

4、 Frequency converter function - Reduce mechanical wear and loss

Staff from related inverter brands said that when the inverter is started, the motor shaft or gear or connected mechanical parts will vibrate violently. This vibration will further increase mechanical wear and loss, and reduce the service life of mechanical parts and motors. When frequency conversion speed regulation is used, the shutdown mode can be controlled and different shutdown modes can be selected to reduce the impact on mechanical parts and motors, making the entire system more reliable, extending service life, and improving system stability.

5、 Inverter function - Adjustable torque limit

After frequency conversion control, the corresponding torque limit can be set to protect the machine from damage, thereby ensuring the continuity of the process and the reliability of the product. At present, frequency conversion technology not only makes the torque limit adjustable, but also the torque control accuracy can reach about 3% to 5%. Under the power frequency state, the motor can only be controlled by detecting the current value or thermal protection, and cannot act like the torque value set in the frequency conversion control.