ABSTRACT
Along with the science and technology progress and economic development.
Electric power application is more and more widely . Electrical production,
transportation, distribution and application of electricity plays a control role, adjust,
test and protection. And the introduction of the PLC make electric control becomes
easy and convenient, intelligent and reliable.
Also called electric hoist, electric hoist is a small-sized lifting equipment, widely
used in weight lifting, lowering, translational carrying, can reduce labor intensity,
improve production efficiency, improve the working conditions necessary machinery,.
Such as in factories, mines, railway stations, ports, construction, hydropower station,
warehouse, etc applied in the production department. It has light weight, compact
structure, small volume, convenient maintenance, durability, etc. Main structure is the
reducer, lifting motor, motor operation and firearms, cable wire, roll device, hook
device, couplings, flexible cable current introduction of device, etc. Integrating force
and braking force. Its executive body is mainly composed of hoisting mechanism and
horizontal moving device, institutions from cone type motor, speed reducer, the wire
reel, etc. Hoist motor through a gearbox drag the wire reel, motor are turning or
reverse, drag the reel, can make the hanging on the rope hook up or down, and realize
the object of raising and lowering, level of mobile device consists of motor, reducer,
the roller, the word "work" beam, etc. Translation can move back and forth on the h
beam of the electric hoist, with mechanical collision block limits move in two
directions before and after the trip.
This article is mainly about the design of the electric hoist control. Through
control of the electric hoist design and work principle of PLC control system analysis,
system design, programming, and debugging work practice, Know machine control
system's general design idea, familiar with and master the peripheral circuit and
software design method, and master the method of using PC to monitor PLC working
conditions.
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