No abstract

Aiming at reducing the elevator's energy consumption, this paper analyses the energy feedback technology, and designs an energy feedback system used for elevator which can return the extra energy to the power grid in the generating state of the motor. The system adopts active inverter technology to achieve energy recycle. In this system, double closed-loop control is used to stabilize the input voltage and realize unity power factor operation. A simulation model is built to demonstrate the performance of the system based on Simulink/Matlab.