Not brushes changes the anti- starter in the
aluminum oxide factory application
Business trillion east Kong Ling E
(Chinese aluminum industry Shandong subsidiary company
Shandong Zibo 255,051)
[ Abstract ] this article has summarized 绕线the type
asynchronous motor application present situation, not brushes changes
the anti- starter the product unique feature, the principle of work,
as well as in aluminum oxide factory promotion behavior in service.
[ Key word ] starter; Not brushes the starter;
Electromagnetism part; Rheostat; Rotor return route;
Steady fast
[ Chinese category number ] TF821 [ literature
identification code ] B [ article serial number ] 1008-5122 (2,004)
04-0003-03
1st, outline
The three-phase 绕线type asynchronous motor is the
aluminum oxide factory main drives one of equipment, because on its
rotor may outside meet the resistance or 电抗, when start has the
higher power factor and the higher start torque as well as can change
merit and so on running rate, is widely applied on equipment and so on
ball mill, chamotte kiln, air blower, vacuum pump the achievement
drives the equipment. But, 绕线type asynchronous motor when
start must serially connect the resistance or the reactor in the
electric motor rotor return route increases the electric motor the
start moment of force, reduces the starting current. In start
process, this resistance or 电抗 the value also must from big to
slightly by the level change, until finally is the zero hour, the
electric motor starts the process only then to finish, enters the
running status, must draw support from a complex assistance starter to
be able to complete the electric motor the start process. Its
start supporting facility is complex, mainly has turns on the
resistance to use 滑环, the electronics brush, the partition
excision metal resistance (or characteristic curve smoother frequency
sensitive resistance), 短接 the rotor return route raises brushes
short-circuits the installment and the exchange contact device.
This set of equipment installment, the debugging complex, the
operation trouble, the accident 率多, the service difficulty, the
spare parts consumption big, the overhaul expense is high. Also
as a result of the partition excision resistance, causes the electric
motor the start characteristic curve to become the steps and ladders
shape, cannot smoothly start and the realization stepless speed
change, the characteristic worse, the energy consumption is big.
Now the commonly used frequency sensitive rheostat, has overcome
the steps and ladders shape characteristic curve characteristic which
the partition excision resistance produces, started in the process in
the electric motor to realize the resistance linear variation, the
stepless speed change, the characteristic curve smooth was reliable.
But it has only solved the electric motor start characteristic
problem, has not solved the electric motor complex start auxiliary
unit.
Not brushed changes the anti- starter both to solve the metal
resistance and the reactor starts the characteristic difference the
characteristic, and has solved the commonly used frequency sensitive
resistance start auxiliary unit complex problem, composed 绕线the
type electric motor original secondary circuit system complex start
auxiliary unit a non- electronic contact electromagnetism part,
directly installed on the electric motor rotor spindle, has solved
绕线a type electric motor starter big difficult problem, has
demonstrated the formidable vitality.
2nd, principle of work
Not brushes changes the anti- starter is the new line
change in sexuality anti- starter which develops using the frequency
sensitive rheostat principle, it is the original secondary circuit
system multi- electronic contacts part composes a non- electronic
contact electromagnetism part, is equal enters 绕线in the rotor
return route to an equivalent impedance string, took when start the
invariable anti- starting outfit, it sensitively changes the anti-
starter biggest difference with the traditional frequency is:
After helps the electric motor completes changes the anti- start
duty still to participate in the electric motor to drive the entire
process, but the traditional frequency sensitive rheostat was cannot
participate in the electric motor to drive the movement, if is
inferior to time excises the frequency sensitively to change the anti-
starter, can create the rheostat heat, even burns down, the
asynchronous motor cannot carry on under the normal rotational speed,
the electric current elevates, even can burn down the electrical
machinery.
Not brushes changes the anti- starter to use the best magnetic
circuit principle, it by components and so on coil winding, inside and
outside ferrite core, axle sleeve, yoke board, wiring column is
composed a non- electronic contact electromagnetism part. It
installs on the original electric motor rotor 滑环 the position.
Its unique unique feature causes not to brush the starter starts
when the start to have an greater resistance value, but when running
status the resistance value nearly is zero. Entire start process
resistance value linear variation, curve smooth, has realized the
electric motor start stepless speed change, steady reliable, also
start moment of force big, the starting current is small. When
the electric motor stator return route just put through the power
source instantaneous, induced to the rotor winding return route
voltage frequency was 50Hz, affected becomes a bigger impedance to the
starter coil in the load belt to the rotor return route in, therefore
the rotor return route electricity changed slightly, but corresponded
in the stator return route the magnitude of current also to change
slightly, along with the rotational speed from slowly to the quick
change, the rotor return route induced tension frequency also changed
from Gao Daodi, when the rotor achieved when rated speed, the rotor
return route induction frequency also approached the zero value, the
starter impedance also approaches the zero value, has completed
绕线the electric motor start task, this time, The starter
still participated in the electric motor the movement. Because
this time starter resistance value approaches the zero value, is equal
to the carbon brush 滑环 running status. Therefore not brushes
changes the anti- motion not to be able to affect the electric motor
the normal operation, is one kind of ideal starter.
3rd, application example
3.1 not brushes changes the anti- starter on vacuum pump
application
In April, 1999, first has carried on the transformation
to four workshops 3# vacuum pump electrical machinery, the vacuum pump
electrical machinery is Guangzhou electrical machinery plant
production JR127-6 the 185kW electric motor, it uses the secondary
circuit string frequency sensitive resistor to start the way, uses
raises brushes short-circuits the organization and the exchange
contact device coordination 短接 rotor return route. The
operation is extremely inconvenient, often because short-circuits the
start to burn out the shunt contact and the electric motor rotor
winding, sometimes because short-circuits the organization not nimbly
to burn out the shunt contact, the electrical machinery 滑环 and the
carbon brush frequently breaks down. Spare parts consumption
big, the overhaul expense was high, cannot satisfy the production
request. After the transformation, has removed 绕线the type
electric motor start auxiliary unit, the frequency sensitive rheostat
and two lines, the operation simple, the operator did not need for to
short-circuit again the start to worry, also overhaul extremely
convenient, moved for more than six months, has not broken down time
of, also operation simple, the movement was steady, deeply is operated
the worker to like, around the transformation see Table 1 to show.
Around table 1 vacuum pump electric motor transforms the
engineering data contrast
Opens when the dynamic electricity start the power
operation electricity works the warm year electricity saving
Flows (A) (S) the factor to flow (A) (? the effect
(Yuan)
Before transformation 560120.8622055
Transforms latter 54080.872104020148
Note: Electrovalence 0.46 Yuan /kWh
The engineering data comparative table is worthy of
looking at from the transformation: After the transformation the
electric motor starting current reduced, the start performance
changed, also the running current drops, the power factor enhanced.
In the ambient temperature is in 30 ?situations, the starter
operating temperature is smaller than 40 ? the start performance is
good, is one kind of ideal start part.
3.2 not brushes changes the anti- starter on ball mill
application
In to the entire factory several vacuum pumps successes
transformation foundation in, we 湿磨 has carried on the
transformation to four workshops 2#. 2# 湿磨 is a ping-pong
grinding machine, uses for parts electrical machinery JR128-8 the
155kW 绕线type asynchronous motor, uses the frequency sensitive
rheostat to start. Because the ball mill stops time, 钢球
piles up in the mill base, also the mill base remains many products
materials, the start is quite difficult, sometimes can not but connect
section of metals resistances in the original frequency sensitive
resistance foundation to change the electric motor the start
characteristic. After uses not brushes changes the anti-
starter, the electric motor start performance big improvement, the
start torque greatly enhances, the starting current reduces, the
starting time is short, completely has satisfied the electric motor
start request, solved has puzzled us for a long time the difficult
problem, reduced the massive overhauls time, was other ball mill
transformations has laid the foundation. As a result of the ball
mill 进料?change and the production craft condition change, the
electrically operated opportunity overload causes the electric current
to elevate, down to has flowed the movement to cause the electric
motor to stop moving. Because the load current is big, the
electric motor 滑环 the carbon brush can give off heat, punctures
the fire, even the heat carbon brush, burns 滑环, down to burns down
the electric motor rotor winding. After uses not brushes changes
the anti- starter, when the electric motor as a result of overloads
decelerates the movement, the rotor return route induction frequency
along with the rpm drop elevates, the starter resistance value
correspondingly increases, thus already increased the electric motor
to drive the moment of force, but also might cause the electric motor
the electric current to reduce, avoids the ball mill because flowing
trips. In actual movement, when the load changes, after the
electric motor electric current has the undulation, the electric motor
rotational speed can rapidly restore normally, the electric motor
rotational speed basic maintenance is invariable, therefore said not
brushes changes the anti- starter to have the steady fast function.
3.3 not brushes changes anti- on the high-pressured electrical
machinery application
The powdered coal dynamo is rubs the system powdered
coal the high-pressured electrical machinery, the electrical machinery
is JR157-8 the 320kW 绕线type asynchronous motor, the rated voltage
is 6KV, the rotor voltage is 501V, the rotor current is 391A, uses the
frequency sensitive rheostat to start. Powdered coal workshop
fire protection rank request higher, 绕线the type asynchronous motor
starter is complex, also existence security hidden danger. The
powdered coal rubs belongs to the ball mill, has the ball mill all
characteristics, because rubs the system to do the powdered coal, load
relative 湿磨 lower, therefore we in to 湿磨 the electrical
machinery success transformation experience foundation in, carried on
to the powdered coal dynamo have not brushed the non- link to
transform, after transformation extremely successful, the effect was
obvious, around the transformation contrasted see Table 2 to show.
Table around 2 high-tensions motor transformation engineering
data contrast
Opens when the dynamic electricity start the power
operation electricity works the warm year electricity saving
Flows (A) (S) the factor to flow (A) (? the effect
(Yuan)
Before transformation 82150.853643
Transforms latter 80130.8635.23844326
Note: Electrovalence 0.46 Yuan /kWh 4th, in the application process pays attention
several questions
(1) not brushes changes the anti- starter to be supposed
to select the specialized factory production the product, otherwise
can cause the start difficulty.
(2) applies on the ball mill should fully consider
the load situation, reasonably has designated the load coefficient.
(3) the system electricity pulls down is not
brushes the non- link starter to start one of difficult main reasons.
(4) not brushes changes the anti- starter not to be
able to participate in the velocity modulation, cannot apply on the
velocity modulation equipment.
5th, concluding remark
Not brushed changes the anti- starter the application to
remove 滑环, the carbon brush, to brush the box, the short circle
secondary circuit and so on the complex start system, not only was
allowed the line start, moreover also maintained 绕线the electric
motor fine performance, simultaneously when load overload had the
steady fast function. Is the operation is simple, exempts the
service, the movement does not have the accident, conserves energy the
highly effective 绕线electric motor starting outfit. Not
brushes changes the anti- starter the application, greatly simplified
has operated worker's operation sequence, might save the massive
overhauls expense every year, each not brushed changes the anti-
starter to save the spare parts to spend (滑环, carbon brush, to
brush box and short circle every year, exchanges contact device,
relay) about the value approximately 8,000 Yuan, about the electricity
saving 20000-50000 Yuan, was worth in the entire factory scope
promotion. Not brushes the starter participation electric motor
to start, the movement entire process, does not participate in the
electric motor the velocity modulation, ill uses in on the equipment
which needs to modulate velocity, but it still has the broad prospects
for development in the aluminum oxide production. At present,
the aluminum oxide factory complete vacuum pump electrical machinery,
four workshops ball mill electrical machinery, the powdered coal
dynamo (high pressure), the powdered coal bridge 吊卷 raises the
electrical machinery, the large cart electrical machinery, the 8#
rotary kiln row of air blower electrical machinery (high pressure) has
completely applied not brushes the starter, the energy conservation
effect is obvious. ----- Elects from "Colored Metallurgy Energy conservation"
in August, 2004 the 4th issue
In this article not brushes changes the anti- starter to
produce the factory is:
The Chengdu binding energy reaches the starter makes the limited
company (when original Chengdu reaches electronic instrument plant)
Address: Chengdu nine bridges Sichuan University
720 research institutes zip codes: 610,064
Telephone: 028-85412731 facsimile:
028-85471609
Contact person: Liu pink clouds
 Http://www.cdjnd.com E-mail:318@cdjnd.com The Chengdu binding energy reached the starter to
make the limited company to develop our country first in 1988 not to
brush changes the anti- starter, the WSBQ series not brushes changes
the anti- starter widely to use in industry and mining enterprise's
the and so on metallurgy, cement, chemical industry electrical
machinery starting. The product has the following merit:
1st, structure simple: Omits 滑环, the carbon brush and
the secondary circuit all electric appliances part.
2nd, starting steady: Stepless speed change, steady
reliable, start moment of force big, the starting current is small.
3rd, movement reliable: The realization exchange
绕线type electric motor not brushes the non- link movement, ceases
the movement accident the occurrence.
4th, avoids the maintenance: Service, spare parts expense
production.
5th, overloads steadily fast: When electrical machinery
load overload the starter has the steady fast function.
6th, enhances the operation percentage: The electrical
machinery movement is more reliable, greatly enhances the equipment
the operation percentage.
7th, the product economy is durable, the nature guarantees above
the deadline for five years.
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