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.


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    Title :

    Rotary braking system and tower crane control system


    Contributors:
    LI BINGFENG (author)

    Publication date :

    2015-04-29


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66C Krane , CRANES



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