Energy recovery device of construction hoist

The utility model discloses an energy recovery device of a construction hoist, which belongs to the technical field of construction hoists, and comprises a cage, a cab is arranged on the side edge of the cage, the energy recovery device is arranged at the top of the cab, the energy recovery device is connected with the direct current end of a frequency converter in the cab, and the energy recovery device comprises a shell and a recovery circuit. And the recovery circuit is arranged in the shell. According to the utility model, the battery pack is charged in a PWM mode, recycling and storage of regenerated energy of the motor can be completed, charging current can be controlled within a safe and reasonable range, and energy recycling is realized by recycling and charging braking energy of the motor into the battery pack; and meanwhile, the electric energy of the battery pack can be supplied to a small fan or low-power electrical power supply of an operator, thereby being more convenient and saving the electric