关键词：塔式起重机 变幅 起升 回转
As the ceaseless development of reforming and opening, modernization has entered a new stage, demand increased for tower crane. At the beginning of 50 time, our country started by imitation of tower crane. Nineteen sixties, due to high buildings, development, extensive use of internal climbing type and external attached tower crane, and in the working mechanism adopts a more advanced technology, such as the speed of the DC motor, the silicon controlled speed, eddy current brake, in a rotary and a running mechanism installed in hydrodynamic coupling. During this period, China began to enter its own design and manufacture of tower crane ‘s stage.
This paper is to meet the needs of each action and design of tower crane electrical control system. From the tower crane luffing motion, rotary motion, and action and each action in the transmission of relay contact control, according to the principle of three-phase asynchronous motor and transmission principle of electrical control circuit design.
With the accession to the PLC controller of the control system of relay – contact compared to only by the controller of the electrical control system than the accession to the PLC controller control system anti interference is strong, but the impact of large tower crane steel structure suitable for small tower crane.
The graduation design for the tower crane electrical control system design, including the lifting mechanism control, three speed change rotary mechanism design, the motor winding gear design, trolley double speed motor control design, electrical components selection, control cabinet arranged diagram, wiring diagram design.
Key Words: Tower crane luffing hoisting slewing