The invention discloses an electric crane including an energy feedback system, the energy feedback system comprises an adjusting type interface module, an adjusting type power supply module, a motor module, a control unit and a motor. When the motor is in a power consumption state, power grid side three-phase alternating current is rectified into direct current through the adjusting type interfacemodule and the adjusting type power supply module, and then the direct current is inverted into three-phase alternating current with the frequency required by the operation of the motor through the motor module. When the motor is in a power generation state, the motor outputs electric energy to the motor module, after the voltage of a direct bus rises to exceed a threshold value, the control unitcontrols the adjusting type power supply module, and the adjusting type power supply module feeds back the electric energy output by the motor to a power grid. The electric energy generated by the motor is recycled and fed back to the power grid through the energy feedback system, and the energy-saving effect is achieved.
本申请公开了一种电动克令吊,包括能量回馈系统,所述能量回馈系统包括调节型接口模块、调节型电源模块、电机模块、控制单元以及电机,在所述电机处于耗电状态时,电网侧三相交流电经所述调节型接口模块和调节型电源模块,整流成直流电,再经所述电机模块逆变成所述电机运行所需要频率的三相交流电;在所述电机处于发电状态时,所述电机向所述电机模块输出电能,在直接母线的电压上升超过阀值后,所述控制单元控制所述调节型电源模块,所述调节型电源模块将所述电机输出的电能回馈到电网。通过能量回馈系统将电机产生的电能回收并反馈到电网,达到节能的效果。
Electric crane
电动克令吊
2020-08-04
Patent
Electronic Resource
Chinese