The energy saving of the inverter is mainly reflected in the application of fans and pumps. In order to ensure the reliability of production, all kinds of production machinery have a certain margin when designing with power drive. When the motor can't run under full load, in addition to meeting the power drive requirements, the excess torque increases the consumption of active power, resulting in wasted power. Fans, pumps and other equipment traditional speed control method is to adjust the air volume and water supply by adjusting the baffle and valve opening of the inlet or outlet. The input power is large, and a large amount of energy is consumed in the interception process of the baffle and the valve. in. When using variable frequency speed regulation, if the flow demand is reduced, the speed can be met by reducing the speed of the pump or fan.
The role of the motor in the frequency converter is to speed up and reduce the starting current. In order to generate a variable voltage and frequency, the device first converts the alternating current of the power source to direct current (DC), a process called rectification. A device that converts direct current (DC) to alternating current (AC) is scientifically termed "inverter". The general inverter is an inverter power source that inverts the DC power supply to a certain fixed frequency and a certain voltage. For the inverter whose inverter is frequency adjustable and voltage adjustable, we call it the inverter. The waveform outputted by the inverter is an analog sine wave, which is mainly used for speed regulation of three-phase asynchronous motor, also called frequency converter. For variable frequency inverters with high waveform requirements mainly used in instrumentation testing equipment, the waveform should be sorted to output a standard sine wave, called a variable frequency power supply. The general variable frequency power supply is 15-20 times the price of the inverter. Since the main device that generates a varying voltage or frequency in the inverter device is called "inverter", the product itself is named "inverter", ie: the inverter.
Frequency conversion is not everywhere to save power, there are many occasions to use frequency conversion does not necessarily save power. As an electronic circuit, the inverter itself consumes power (about 3-5% of rated power). A 1.5-pound air conditioner has a power consumption of 20-30W, which is equivalent to a long lamp. It is a fact that the inverter runs at the power frequency and has a power saving function. But his preconditions are:
First, high power and is a fan/pump type load;
Second, the device itself has a power saving function (software support);