The functional role of the frequency converter

Frequency conversion saves energy

The energy saving of the inverter is mainly manifested in the application of fans and pumps. In order to ensure the reliability of production, various production machinery has a certain margin when designing and matching power drive. When the motor cannot operate at full load, in addition to meeting the power drive requirements, the excess torque increases the consumption of active power, resulting in a waste of electric energy. The traditional speed regulation method of fans, pumps and other equipment is to adjust the air volume and water supply by adjusting the baffle and valve opening of the inlet or outlet, and its input power is large, and a large amount of energy consumption is consumed in the process of interception of the baffle and valve. When using variable frequency speed regulation, if the flow requirement is reduced, the speed of the pump or fan can be reduced.

The function of the motor using a frequency converter is to regulate the speed and reduce the starting current. In order to generate variable voltage and frequency, the device first converts the alternating current of the power supply into direct current (DC), a process called rectification. A device that converts direct current (DC) into alternating current (AC), the scientific term is "inverter". Generally, the inverter is an inverter power supply that inverts the DC power supply into a certain fixed frequency and a certain voltage. For inverters with adjustable frequency and adjustable voltage, we call them frequency converters. The waveform output by the frequency converter is an analog sine wave, which is mainly used in three-phase asynchronous motor speed regulation, also known as frequency conversion speed governor. For variable frequency inverters with high waveform requirements mainly used in instrumentation testing equipment, to sort out the waveform, a standard sine wave can be output, called frequency conversion power supply. Generally, the frequency conversion power supply is 15-20 times the price of the frequency converter. Since the main device that produces a changing voltage or frequency in the inverter equipment is called "inverter", the product itself is named "inverter", that is: frequency converter.