The invention discloses a rotary braking system and a tower crane control system. The rotary braking system comprises a rotary braking circuit and a rotary eddy current braking circuit, wherein the rotary braking circuit comprises a switch, a first transformer, a rectifying circuit, a brake switch and a first storage battery; the switch is automatically switched on when sudden power failure of the power grid is caused or when the power grid fails; the first transformer is connected in series between the power grid and a rotary braking power supply of the tower crane; the first storage battery is connected to the rotary braking power supply by virtue of the switch and the brake switch; the rotary eddy current braking circuit comprises a power grid power supply circuit and a storage battery power supply circuit; and the storage battery power supply circuit comprises a second transformer connected in series between the power grid and an eddy current coil of the eddy current motor, a rectification filter circuit, a charging circuit, a second storage battery, an internal control relay, and a relay control circuit connected with the internal control relay. According to the systems disclosed by the invention, the eddy current braking failure and out-of-control risk caused by the power failure or fault of the power grid can be effectively avoided.
Rotary braking system and tower crane control system
29.04.2015
Patent
Elektronische Ressource
Englisch
IPC: | B66C Krane , CRANES |
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