The invention discloses a crane direct control and limit control module. The crane direct control and limit control module comprises a limit switch and a three-phase power supply for the operation of a crane, and further comprises a phase sequence identification unit, a relay and a contactor; the phase sequence identification unit is used for identifying positive and negative phase sequences of the three-phase power supply and controlling the relay to start according to the positive and negative phase sequences of the three-phase power supply; the relay is used for controlling the contactor to start; the contactor is used for controlling the operation of the motor; and the limit switch is connected in series with the position between the relay and the contactor. According to the crane direct control and limit control module, the vertical limiting function of the crane can be directly achieved only through a power supply cable, signal lines can be omitted, the cost is reduced, and inconvenience caused by the fact that the signal lines are additionally arranged is reduced.
本发明公开了一种吊机直控带限位控制模块,包括限位开关以及用于供电机运行的三相电电源,还包括:相序识别单元、继电器、接触器;所述相序识别单元用于识别三相电电源的正反相序并依此来控制继电器启动;所述继电器用于控制接触器启动;所述接触器用于控制电机运行;限位开关串联在继电器、接触器之间。本发明可以实现只用供电线缆直接实现吊机带上下限位功能,可省去信号线,降低成本,减少因增加信号线带来的不便。
Crane direct control and limiting control module and crane
一种吊机直控带限位控制模块及吊机
2021-06-01
Patent
Electronic Resource
Chinese
IPC: | B66C Krane , CRANES |
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