四川师范大学
2011
届毕业生毕业设计
内容摘要
?/p>
本文研讨基于可编程序控制器(
PLC
)和变频器的桥式起重机控制系统的?/p>
进?/p>
阐述了交流桥式起重机在实际中的应用以?/p>
PLC
在改造方案中的确定,
亦涉
及在改造过程中设备的选型。本文以西门?/p>
S7-200
系列
PLC
为例,讲述了
PLC
在交流桥式起重机改造中的的控制方案?/p>
与传统控制方案相比,
采用
PLC
控制?/p>
桥式起重机可以简化繁重的设备?/p>
使控制更加安全可靠?/p>
从经济效益与环境效益
的角度分析,
本设计虽然前期投入一部分资金用于购买
PLC
及变频器等设备,
?/p>
是长期运行后的维修成本远低于原系统,并且节能可达
30%
左右。设计中变频?/p>
通过
PLC
进行无触点控制,使设备运行更加准确,并且减轻了人员的劳动强度?/p>
提高了工作效率?/p>
关键?/p>
?/p>
桥式起重?/p>
变频?/p>
PLC
控制系统
The Design of PLC-based Bridge Crane System
Abstract
:
This text
discussion the improved design of bridge crane control system based
on PLC and frequency converter. Introduced the application of Bridge crane,
the
application
of
PLC
in
reconstructive
transform
and
choosing
the
device.
The
text
takes
Siemens
S7-200
PLC
series
as
an
example,
introduced
the
control
project
of
Bridge
crane
system.
Compared
with
traditional
control
scheme
?/p>
PLC-based
Bridge
Crane
can
Simplify
the
heavy
equipment
?/p>
and
make control more safety and reliable. Analysis from economic benefits and
environmental
benefits,
The
maintenance
cost
is
far
below
original
system
after
long-term
operation
?/p>
and
Saves
about
30%
of
energy
?/p>
beside
a
fond
musts put into buying PLC and inverter and other equipment .
In this design,
Inverter
non-contact
programmable
controller
controls
the
equipment
to
run
more accurate, as well as reduced labor strength, increased efficiency.
Key words:
bridge crane; frequency converter; PLC; control system