Three phase frequency inverter, also named as 3 phase variable frequency drive (VFD), is a motor control with 3 phase input and output that drives motor by changing the frequency and voltage supplied to the motor. The frequency is directly related to the rotary speed of the motor, in other words, the faster the frequency, the faster the rotary speed. If the motor is no need to run at full speed, the frequency inverter can be used to reduce frequency and voltage to meet the requirement of motor load.
Single phase output frequency inverter, also called 1 phase variable frequency drive or VFD, is a power control equipment that adopts frequency conversion technology and microelectronic technology to control the AC induction motor by changing its working power frequency. Frequency inverter is mainly composed of rectifier (AC to DC), filter, inverter (DC to AC), brake unit, drive unit, detection unit and micro-processing unit. It relies on internal IGBT disconnection to adjust output power supply voltage and frequency and provide the required power supply voltage according to the actual requirements of the motor, so as to realize speed regulation and energy saving. In addition, the frequency inverter has many protection functions, such as overcurrent, overvoltage and overload protection. With the continuous improvement of industrial automation, the frequency inverter have also been very widely used.
Single to three phase frequency inverter is a motor control with single phase input and three phase output, which is mainly used for speed control of 3 phase AC induction motor on 1 phase power supply. Frequency inverter, as known as variable frequency drive (short for VFD), has lots of functions and operation ability. For example, it provides phase supply protection, undervoltage protection and overvoltage protection for motors.
The sine wave inverter is a kind of inverter that direct current into alternating current. It is widely used for air conditioning, television, water heater, LED light, printer, computer system, communication system, aviation, emergency, industrial equipment and communication equipment, etc. The pure sine wave inverter can also be used in places where emergency backup power is required, which can constitute EPS emergency power supply system. The output waveform of the sine wave inverter is a complete sine wave with low distortion rate, therefore, it is low noise and high efficiency.