唐悦奇:基于 PLC 的施工场地升降机控制系统设计
Abstract
Lift that is, a simple lift. As the vertical transport of modern high-rise buildings, the
elevator and the lives of people closely related with the continuous improvement of the people
on the elevator operational safety, efficiency, comfort requirements, the elevator rapid
development. Drag technology has developed to a FM variable voltage control, logic control
instead of the original relay control by PLC.
The elevator uses a PLC control software to achieve automatic control of the elevator operation, and
reliability are increased. The
control system structure
is
simple,
external
circuit
is
simplified,
and
can
easily add or
change
of
control functions
can also be
automatic fault detection
and
alarm
display
, improve
operational safety
and
easy maintenance.
Motor AC inverter speed control
technology is today's energy-saving, and to improve the process to improve product quality, improve the
environment, a major means of technological advancement. The inverter is its superior speed performance
and from the braking performance, high efficiency, high power factor and energy-saving effect, the broad
scope of application and many other benefits by the domestic and international public .that the most
promising speed.
Designed taking into account the practical features of the construction site lifts the
control system design for a four-story elevator. Drag the governor of the elevator instead of
the traditional relay control system by the inverter, so that the combination of PLC and speed
drag devices, constitute the PLC sets the election control systems, elevator control, improved
elevatorreliability of operation, to reduce the failure rate.
Key words:Elevator,PLC control,VVVF,Inverter
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