The supplier of frequency converter supporting equipment reminds you that the rotational speed of the motor is proportional to the frequency, so changing the frequency can directly change the rotational speed of the motor. Generally, electric motors use frequency converters to regulate speed and reduce starting current.
In order to generate variable voltage and frequency, the first step is to convert the alternating current of the power supply into direct current (DC), which is called rectification. The scientific term for a device that converts direct current (DC) into alternating current (AC) is "inverter".
A general inverter is an inverter that converts a DC power supply into a fixed frequency and voltage. For inverters, they can be analyzed as frequency adjustable and voltage adjustable, and we call this type of inverter a frequency converter.
The waveform output by the frequency converter is an analog sine wave, mainly used for speed regulation of three-phase asynchronous motors, also known as frequency converters.
For variable frequency inverters with high waveform requirements mainly used in instrumentation detection equipment, the waveform needs to be organized to output standard sine waves, which is called a variable frequency power supply.
Generally, the price of a variable frequency power supply is 15-20 times that of a variable frequency drive. Due to the fact that the main device that generates voltage or frequency changes in frequency converter equipment is called "inverter", the product itself is named "inverter", which is what we call: frequency converter.