FGI - Four-Quadrant Inverter

FGI is an early professional manufacturer engaged in the research of hoist (four-quadrant or energy feedback type) inverter in China. The high-voltage four-quadrant (hoist) inverter adopts advanced vector control technology. The main difference between vector control and traditional V/F control is that vector control can separate the reactive current from the active current (torque current), and can automatically adjust the active current according to the change of the load during lifting process to make the output torque reach the best working condition which can output 2.5 times of the rated torque.