电动机控制中英文对照外文翻译文献

电动机控制中英文对照外文翻译文献

电动机控制中英文对照外文翻译文献

(

文档含英文原文和中文翻译

)

原文：

Control of Electric winch

For motor control, we know the best way is to use the style buttons to move

the many simple manual console. And this console, in some applications may still be

a

good

choice,

as

some

complex

control

headache

can

also

be

used.

This

article

describes in your design, build or purchase winch controller, you have the motor's

basic electrical equipment and you will need to address the user interface command

addressed.

First,

the

manual

should

be

a

manual

control

console

type,

so

if

you

remove

your finger buttons, hoist will stop. In addition, each control station equipped with

an emergency need to brake, hoist the emergency brake to cut off all power, not just

the control circuit. Think about it, if the hoist at the stop, it did not stop, you do need

a way to cut off the fault line protection power. Set the table in the control of a key

operated

switch,

is

also

a

very

good

idea,

especially

in

the

line

leading

to

the

电动机控制中英文对照外文翻译文献

workstation can not control, you can use the switch.

(in the design of the console, even the simplest manual console, but also consider

setting by specialized personnel to operate the safe operation of the keys.)

Constant speed motor control

For a fixed speed winch actual control device is a three-phase starter. Turn the

motor

is

reversed,

by

a

simple

switch

controlled

phase

transformation

sequence

from

ABC

to

CBA.

These

actions

are

completed

by

two

three-pole

contactor-style,

and

they

are

interlocked,

so

that

they

can

not

be

simultaneously

closed.

NEC,

required in addition to overload and short circuit protection devices. To protect the

motor against overload due to mechanical effects caused by overheating in the heat

to

be

installed

inside

the

starter

overload

delay

device.

When

the

heat

overload

delay device overheating, it has a long double off the metal motor power. In addition

In addition, you can also select a thermistor can be installed in the motor winding

way,

it

can

be

used

to

monitor

motor

temperature

changes.

For

the

short- circuit

protection, we generally used by motor fuses to achieve.

A linear current independent contactors, the contactors are configured should

be

more

than

the

current

main

circuit

contactor,

so

as

to

achieve

the

purpose

of

redundancy. This sets the current contactor is controlled by the security circuit, such

as: emergency brake and the more- way limits.

We can use the limit switches to achieve the above operation. When you reach

the end of the normal travel limit position, the hoist will stop, and you can only move

the winch in the opposite direction (ie, the direction away from the limit position.)

There is also need for a more limited way just in case, due to electrical or mechanical

problems, leaving the operation of hoist limit bit more than normal. If you run into

more

limiter,

linear

contactor

will

open,

therefore,

can

not

be

driven

winch

will

exceed this limit position. If this happens, you need to ask a professional technician

to check the lead to meet the more specific reasons limiter. Then, you can use the

电动机控制中英文对照外文翻译文献

starter toggle switch inside the elastic recovery process to deal with more problems,

rather than tripping device or a hand-off the current contacts.

A necessary condition for speed

Of course, the simple fixed speed starter is replaced by variable speed drives.

This makes things start to get interesting again! At a minimum, you need to add a

speed control dial operation platform. Joystick is a better user interface, because it

makes you move parts of a more intuitive control.

Unfortunately, you can not just from your local console to send commands to

control the old variable speed drives, in addition, you can not want it in the initial

stages, will be able to enhance the safe and reliable and decentralized facilities. Most

of

the

variable

speed

drive

can

not

achieve

these

requirements,

because

they

are

not

designed

to

do

upgrading

work.

Drivers

need

to

be

set

to

release

the

brake

before

the

motor

can

generate

torque,

and

when

parking,

that

is,

before

the

revocation of torque, the brake will be the first action.

For many years, DC motors and drives provide a number of common solutions,

such as when they are in a variety of speeds with good torque characteristics. For

most of the hoist of the large demand for DC motor is very expensive, and that the

same type of AC motor than the much more expensive. Although the early AC drives

are not very useful, as they have a very limited scope of application of the speed, but

produced only a small low-speed torque. Now, with the DC drives the development

of

low

cost

and

a

large

number

of

available

AC

motors

has

led

to

a

communication-driven revolution.

Variable

speed

AC

drives

in

two

series.

Frequency

converter

has

been

widely

known and, indeed, easy to use. These drives convert AC into DC, and then, and then

convert

it

back

to

exchange,

the

exchange

after

the

conversion

is

a

different

frequency. If the drive produced the exchange of 30Hz, 60Hz a normal motor will run

at half speed. Theoretically, this is very good, but in practice, this will have a lot of

problems. First of all, a typical linear motor 60Hz frequencies below 2Hz 3Hz area or

there will be errors, and start cog (that urgent push, yank), or parking. This will limit

your speed range lower than 20:1, almost not adapted to the operational phase of

the

fine

adjustment.

Second,

many

low-cost

converter

is

not

able

to

provide

the

rated

torque

at

low

speeds.

Use

of

these

drives,

will

result

in

the

rapid

move

to

upgrade the components or complete failure, precisely, when you try to upgrade a

stable

scientific

instruments,

you

do

not

want

to

see

this

situation.

Some

new

inverter is a closed- loop system (to get feedback from the motor to provide a more

accurate speed control), and the motor will work quite well.

Another

series

of

AC

drives

is

the

flow

vector

type

drive.

These

components

require installation of the spindle motor encoder, encoder makes use of these drives

电动机控制中英文对照外文翻译文献

can

accurately

monitor

the

rotation

of

the

motor

armature.

Processor

accurately

measured magnetic flux vector values that are required to make the armature at a

given speed rotation. These drives allow infinite speed, so you actually can produce

at

zero

speed

to

rated

torque.

These

drives

provide

precise

speed

and

position

control, so these drives in high performance applications to be welcomed.

(Based

on

PLC

controllers

provide

system

status

and

control

options.

This

screen

shows the operator full access to the nine-story elevator enhance the control panel.)

PLC-based systems

Is

the

full

name

of

a

PLC

programmable

logic

controller.

First

of

all,

PLC

controller developed to replace the fifties and sixties-based industrial control system

relay, they work in harsh industrial indoor environments. These are modular systems

that have a large variety of I / O modules. The modular system can easily achieve the

semi-custom

hardware

configuration

assembled,

and

the

resulting

configuration

is

also

very

reasonable

price.

These

modules

include:

position

control

module,

the

counter, A / D and D / A converter, and a variety of physical state or physical contact

with closed output module. Large number of different types of I / O components and

PLC module property makes it an effective way to assemble custom and semi custom

control system.

The biggest shortcoming of PLC systems is the lack of the real number of display

to tell you what is being done and the PLC on the PLC program to help you.

T

he first is professional entertainment for the large-scale PLC system is one of

the

original

in

Las

Vegas,

MGM

(now

Bailey

Company)

of

the

riding

and

carriage

system.

Many

manufacturers

offer

a

standard

PLC-based

semi-automated

acoustic

systems and a host of signs, set the location of the command line interpreter, and

the upgrading of the control system is also available. Using standard modules to set

user-defined

system

configuration

capability

is

based

on

the

PLC

controller

of

the

greatest advantage.

电动机控制中英文对照外文翻译文献

High-end controller

For

complex

transmission,

the

controller

became

complex,

more

than

speed,

time and location control. They include complex instructions to write and record the

movement

contour,

and

the

processing

can

immediately

run

the

ability

to

multi-point instructions.

Many large opera house is toward the direction of point lift system, where each

one

is

equipped

with

a

rope

to

enhance

independent

winches,

rope

equivalent

to

those

of

each

dimmer

circuit.

When

more

than

one

hoist

is

used

to

enhance

the

individual part, the hoist must be fully synchronous, or the load to shift, so will lead

to a separate winch becomes the risk of overload. Control system must be able to be

selected to keep pace winch, or a hoist winch is not able to maintain synchronization

with

the

other,

can

provide

the

same

high-speed

parking

capacity.

For

a

typical

speed

of

240

ft

/

min and

a

winch

to

maintain the rate

of

error

of

between

1 /

8

points of equipment, you only have less than three microseconds of time to identify

problems and try to correct the error The hoist speed, make sure you fail, you start

all the winch stop the group. This will require a large amount of computation, fast I /

O interface, and easy to use to write software.

For large rope control system has two very different solutions. The first is to use

a separate console, the problem in general terms, this console should be installed in

the

appropriate

location

of

the

operator

perspective.

However,

this

not

only

from

one angle to another angle, but still can not get an instruction to another instruction

from the control. These difficulties have been partially resolved. Installed in different

locations

through

the

use

of

video

cameras,

and

these

cameras

connected

to

the

three-dimensional display graphics, these graphics enables the operator to observe

from

the

perspective

of

any

of

the

three

coordinates

in

the

expected

direction

of

rope

movement.

These

operators

can

make

from

a

console

for

him

at

the

actual

angle,

or

closed

circuit

camera

practical

perspective,

to

observe

the

movement

of

the

rope

on

the

screen.

For

the

complex

interrelated

moving

parts,

makes

the

implementation of the above observation Failure to control and find out easier.

Another solution to the problem is a distributed system that uses multiple light

console. This will allow the different operators in the same way the different aspects

of control gear, we have improved the manual control device. A vivid example is the

flower in a vegetable market in central London, the Royal Opera House, the program

uses the

above,

where

the

control

console 240 with ten motors.

Each

console

has

five playback device, and has been open, so that each motor has been assigned to a

single console. An operator and a console can control all the devices, however, often

may be running a console platform screen upgrade, another console is a console on

the transmission device, and the third console is used to the necessary background

电动机控制中英文对照外文翻译文献

in the background image down.

(edge-type

portable

console

allows

the

operator

many

advantages

from

the

start to control the movement of the machine, and provide three- dimensional image

display.)

Conclusion

A huge change in the rope control

system, a workstation has been developed

from a push-button to complex multi-user computerized control system. When the

control system to buy rope, you can always find to meet your needs. Control system

performance is the most important security and reliability. These are the true value

of the property, and you can expect the price to buy a suitable way of security. With

a certain product manufacturers to work, he will make you know how to install it.

And

he

will

make

contact

with

you

and

the

users,

those

users

have

with

similar

requests.