There are some difference between AC-DC-AC phase converter and frequency converter plus transformer. Technically, phase converter features AC-DC-AC circuit structure, adopts the modulation control technology of SVPWM space vector algorithm to convert ordinary single-phase electricity to industrial three-phase electricity, which some users can not apply for due to harsh site restrictions and the single phase to three phase converters are widely applicable for various loads, such as robot arms, motors, lathes, elevators, inverters, compressors, etc. However, frequency converter plus transformer is a power control device that uses both frequency conversion technology and microelectronics technology to control AC motors by changing the frequency of the motor's working power supply. The detailed difference between them is shown as following. Usage For phase converter, through converting single phase to three phase power , such as turning the single phase 220V to three-phase 380V power