sack基于PLC的电梯控制系统设计中英文翻译.doc

2021年1月21日发(作者：采用英语)
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Elevator System Based on PLC
Composed
by
the
order
of
relay
control
system
is
a
realization
of
the
first
elevator
control
method.
However,
to
enter
the
nineties,
with
the
development
of
science
and
technology
and
the
widespread
application
of
computer
technology,
the
safety
of
elevators,
reliability
of
the
increasingly
high
demand
on
the
relay
control
weaknesses
are
becoming
evident.
Elevator
control
system
relays
the
failure
rate
high,
greatly
reduces
the
reliability
and
safety of elevators, and escalators stopped often to take with the staff about the inconvenience
and fear. And the event rather than taking the lift or squat at the end of the lift will not only
cause damage to mechanical components, but also personal accident may occur.
Programmable Logic Controller (PLC) is the first order logic control in accordance with
the
needs
of
developed
specifically
for
industrial
environment
applications
to
operate
the
electronic digital computing device. Given its advantages, at present, the relay control the lift
has been gradually replaced by PLC control. At the same time, AC variable frequency motor
speed control technology, the way the lift drag speed has been a gradual transition form DC to
AC
frequency
converter.
Thus,
PLC
control
technology
increases
VVVF
Elevator
modern
technology has become a hot industry.
1. PLC elevator control advantages:
(1) Used in elevator control PLC, with so ware for automatic control of lift operation,
reliability greatly increased.
(2) Layer was removed and majority of the relay, the control system structure is simple,
simplify the external circuit.
(3)
PLC
can
be
a
variety
of
complex
control
system,
easy
to
add
or
change
control
functions.
(4) PLC can be automated fault detection and alarm display to improve the operation of
security and ease of maintenance.
(5) For the group control the allocation and management, and improve the efficiency of
elevator operation.
(6)Do not need to change the control scheme changes when the hardware connection.
2. VVVF elevator control characteristics.
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With
the
power
electronics,
microelectronics
and
computer
technology
to
control
the
rapid
development
of technology, communication technology VVVF
also
a very rapid
rate.
AC variable frequency motor speed control technology is the power to improve the process in
order to improve product quality and improving the environment and promoting technological
progress
as
a
primary
means.
Frequency
of
its
excellent
performance
and
the
speed
brake
from a smooth performance, high efficiency, high power factor and power-saving of a broad
scope of application and many other advantages of being at home and abroad recognized as
the most promising approach speed.
Exchange characteristics of VVVF Elevator:
(1) low energy consumption.
(2) low load circuit, the re emergency power supply device of small.

In
the
acceleration
stage,
the
required
start-up
current
of
less
than
2.5
times
the
rated
current. Peak starting current and time is short. Since the starting current is drastically reduced,
so power consumption and power supply cable diameter can be reduced a lot. Required for
emergency power supply devices are also relatively small size.
(3) high reliability and long service life.
(4) good comfort.
Elevator
operation
is
best
to
follow
the
speed
curve
of
a
given
operation.
Their
characteristics can be adapted to human feelings, and to ensure that noise operation, smooth
brake Ping layer and high precision.























(5) stable noise- free.
(6)
In
the
car,
the
engine
room
and
adjacent
areas
to
ensure
that
noise.
Because
their
systems use a high clock frequency. Always produce a true sine wave power supply current
yet. Motor torque ripple does not appear. Therefore, to eliminate vibration and noise.
3. Elevator control technology.
The
so-called
elevator
control
technology
refers
to
the
elevator
drive
system
and
electrical control system of automatic control. 70 as the 20th century in China’s elevator were
marked
by
the
exchange
of
two-speed
elevator.
Its
speed
is
used
to
change
the
elevator
traction motor of the very few, two or mute-level approach to the number of windings, very
few
of
them
as
high-speed
winding
of
the
winding,
a
very
few
number
of
windings
as
the
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low-speed winding. Windings for high-speed elevator-speed start-up and running, low-speed
windings for braking and the maintenance of elevators.
The early 80s, VVVF inverter controlled variable lift system available. It uses AC motor
drivers, are able to reach the level of DC motor, control the speed of the current has reached 6
m/sec. Its small size, light weight, high efficiency, energy saving, inc1uding the past almost
all the advantages of the lift. Is the latest elevator drive system
Operation in vertical lift, there is also the starting point of the terminus station. For more
than
three- story
elevator
buildings,
the
starting
point
of
the
terminal
stations
and
stops
between
the
had
not,
the
starting
point
for
these
stations
at
the
first
floor
of
the
terminal
located
at
the
highest
floor.
Starting
point
in
the
first
floor
of
the
station
known
as
base
stations, known as the starting point at both ends of the terminal stations and stations at both
ends of intermediate stops between stations.
Outside the station has a call box, box set are used by staff for elevator call button or
touch the call button, the general ends of the lift stations in the call box on the Settings button
or touch of a button. 1iddle layer of the station set up the call box button or touch button 2. No
drivers for the control of elevators, at various stations are set up calls me on a button or touch
button. Elevator car
and the internal
settings (except
for debris elevator) to
manipulate me.
Control box switch on the handle or set up stations and the corresponding layer of buttons or
touch-button
control
box
on
the
touch- control
button
or
command
button
or
touch
the
city
button. Outside the command button or touch-button issue as the signal outside the command
signal,
within
the
command
button
or
touch-button
issue
within
the
signal
as
a
command
signal. 80 In the mid-20th century, the touch button has been replaced by micro-button.
As the elevator
call box outside the base station,
in
addition
to
set
up a call button or
touch
button,
but
a1so
set
a
key
switch
in
order
to
work
the
elevator
clearance.
Drivers
or
management staff to open the elevator to the base station can wriggle through a dedicated key
to
the
key
switch.
Close
the
elevator
in
place
to
autocratically
cut
off
the
elevator
control
power supply or power supply.
4. PLC Control Elevator Design.
With
the
continuous
development
of
urban
construction,
the
increasing
high-rise
buildings,
elevators
and
life
in
the
national
economy
has
a
broad
application.
Elevator
high-rise
buildings
as
a
means
of
transport
in
the
vertical
run
of
daily
life
have
been