Four-link portal crane

The spreader is full rotation and automatic follow-up function.
The active inverter technology can convert the kinetic energy and potential energy stored in the machinery into electrical energy and feed it back to the power grid efficiently.
Suppress the pollution of higher harmonics to the power grid and improve the power factor of the whole machine.
Record all the parameters of the action in one or more working cycles, and realize the automatic cycle execution of this action by calculating the calculation of the wire harness and the acceleration and deceleration time.
Calculate the running acceleration of the lifting point for different actions, set up segmented protection, detect the stall trend in advance, and combine with the hardware overspeed switch to achieve double protection and effectively prevent the occurrence of stall accidents.
When the spreader is lifted to a limited height, the control relay makes the buzzer on the control box alarm, and the lifting action stops at the same time, and only the operation of lowering can be carried out, so as to prevent the phenomenon of over-rolling of the lifting hook.