1 foreword
The super pressure flint paper is called the SC paper,
is inexpensive 磨木? chemistry take the price 机械?or the
scrap paper 脱墨 thick liquid as well as the wheat straw pulp as the
main raw material, matches by the few long textile fibers 化学?
and increases 30% above the padding to make, its smoothness reaches above 500S, the opacity reaches above 85%,
裂断长vertically and horizontally equally reaches above 3000m, its
quality may spread the cloth paper with the low quota to compare
favorably with, may serve as the advertisement, the table of contents,
the inset and so on the color printing. Because this craft use
massive padding and are high rate 磨木?or machine the thick
liquid, may save the textile fiber and the timber resources, therefore
may greatly reduce the cost. The paper page after the
supercalender 压光, may enhance the paper page smoothness,
glossiness and 紧度, causes the paper page entire thickness to be
consistent, thus improves the paper the outward appearance quality,
and reduced permeability.
The chart one shows the super supercalender mainly divides into
puts the volume installment (name to draw back paper), 压光?the
installment (contains host electrical machinery) and receives the
volume installment and so on. The original from puts the volume
equipment place after to direct 纸辊 in turn and 冷铸?enters
the center after each 纸粕 roller to receive the volume. How
does this article elaborate is uses the frequency conversion to
control completes the super supercalender the transmission control.
A chart super supercalender diagram
2 super supercalenders frequency conversion
controls
2.1 split-rings tensity control plans
The super supercalender in the fast start, fast stops as
well as among continuously modulates velocity must guarantee the paper
page the tensity is constant, otherwise gathers the paper page can the
curl, 折页 even break, seriously affects the production the quality
and the output. In this system using the frequency changer
combination achieved the precise tensity control, we knew in the
ordinary circumstances may be allowed to satisfy such request through
two ways: One, through controls the electrical machinery the
speed to realize, two is through controls the electrical machinery the
torque to realize. Because considered installs the tensity
sensor the cost and the condition, therefore uses the split-ring the
tensity to control realizes. Certainly under this control mode,
the paper page tensity or must have to know, nothing but it is, thus
reduced the system cost and the difficulty which and calculates
through the frequency changer interior examination gains.
May calculate the frequency changer by the hypothesis tensity
and a reel volume diameter the torque instruction, its formula as
follows:
T= (F X D) / (2 X i )
Among: T is the frequency changer
output torque instruction; F is the tensity hypothesis
instruction; D is a reel volume diameter; I is the
register ratio.
This plan must consider the line speed examination signal, the
volume diameter computation and the tensity 锥度 control, can
accurately control the electrical machinery like this the torque
output, maintenance tensity constant.
2.2 super supercalenders frequency conversion
组构
Below the super supercalender 主传?the power
computation may according to:
P = K x B x V x N
Among: P is the electric motor power (KW);
K is often the coefficient, generally takes 0.015~0.026; V
for work vehicle speed (M/min); N is the roller number (root).
Take Sichuan some paper mill as the example, uses 12
rollers super supercalenders, receives the volume the paper to extend
1M, thick 10um, the design vehicle speed is 250 meters/minute.
Then selects the host tows the electrical machinery (frequency
changer) the power is: P = 0.018 X 1 X 250 X 12 = 54KW,
therefore may select 55KW the frequency changer.
This system uses the high performance as follows vector
frequency changer TD3000, the disposition: The host tows the
frequency changer: TD3000-4T0550G, receives the volume frequency
changer: TD3300-4T0055G. Moreover receives the
volume electrical machinery to use the frequency conversion electrical
machinery, and installs revolves the encoder (ohm dragon, 1,024
outputs)
Chart two super supercalenders
electricities disposition diagram
2.3 frequency conversion velocity
modulation control description
This system actuates 主传?the electrical machinery
with the TD3000 vector open-loop control, receives volume frequency
changer TD3300 to use the split-ring tensity control pattern.
The host tows the speed assigns from the AI1 input, the control
precision reaches 1%~0.5%. Before TD3300 uses the level host to
tow frequency changer TD3000 simulation outlet AO2 (to output the
TD3000 frequency changer movement frequency) to obtain the line speed,
and carries on the volume diameter computation; The tensity
hypothesis signal gains by AI1; Revolves the encoder signal
separately to receive the PGP/COM/A-/B- mouth.
3 super supercalenders receive volume frequency
changer the debugging step
3.1 initially inspects the frequency
changer, the electrical machinery, revolves the encoder wiring and the
data plate parameter.
Electrical machinery data plate: Rated power 5.5kw, rated
voltage 380V, nominal frequency 50Hz, nominal current 11.6A, rated
speed 1440RPM.
Revolves the encoder: The ohm dragon 1,024
outputs, power line voltage 24VDC, A\B\Z leads the way the collecting
electrode output.
3.2 completes the frequency changer electrical
machinery parameter from to recognize
Key inspects the electrical machinery idling electric
current which the frequency changer recognizes, the electrical
machinery idling electric current is normal should in the electrical
machinery nominal current 30% ~ 50% scope. The TD3300 frequency
changer actually recognizes the electrical machinery the idling
electric current is 4.9A, is the electrical machinery nominal current
42%, in normal range.
3.3 initially tests the frequency changer to the
electrical machinery driving force
The TD3000 frequency changer establishes as the
split-ring vector control pattern, TD3300 establishes as the closed
loop vector control pattern, the TD3300 frequency changer should
establish the encoder in (FB encoder function item) the parameter
(FB.00=1024), in the keyboard control pattern test frequency changer
to the electrical machinery driving force, observes the frequency
changer with emphasis the output frequency stability and the output
current size, specially pays attention to the TD3300 frequency changer
the output current, if in the idling situation, the output current
greatly and reports has flowed the breakdown, should be revolves the
encoder A\B wiring to have harms, replaces the A\B wiring or changes
in the frequency changer the PG wiring direction hypothesis
(functional code FB.01).
3.4 completes TD3000 and the TD3300 signal
connection test
Completes TD3000 frequency changer simulation outlet
AO2 (F6.07=1) and the TD3300 frequency changer simulation loses
entrance AI2 (F6.01=0, F6.04=1.0) related parameter establishment,
inspects the TD3300 frequency changer to meet on oral plate AI2 the
V/I port to jump the line in I side, and adjusts TD3000 simulation
outlet AO2 the output and the corresponding TD3300 simulation loses
entrance AI2 linear (temporarily to revise TD3000 the frequency
changer AO2 mouth (F6.07=0) is the hypothesis frequency output,
establishes F3.03=0, through to revise F3.04 the value to be possible
to change the AO2 mouth the output value. Using TD3300 keyboard
engine off when may demonstrate AI2 the input voltage value -
establishes FD.02=1024, in the situation which on TD3000 and TD3300
the electricity does not move, revises TD3000 the frequency changer
F6.10-AO2 zero-bias adjustment and F6.11 - the AO2 gain hypothesis,
may complete its linear adjustment).
3.5 establishes TD3000 and the TD3300 frequency
changer other correlations moves the parameter, initially the
ambulacrum carries tries to move.
F3.06=3, split-ring tensity control pattern;
The F1.00=2.81, equipment factory provides receives the volume
electrical machinery with to receive the volume reel 转?
F5.03 (multi-purpose 端子 X3) = 12, curls the diameter to
reposition 1 instruction;
F8.00=0, receives the volume pattern;
F8.01=1, AI1 hypothesis;
F8.03=1000, revises according to the scene debugging situation,
satisfies the tensity to establish the potentiometer the adjustment
request;
The F8.08=0, preliminary hypothesis volume diameter does not
calculate, when guarantee preliminary test tensity stability;
F8.09=500, the equipment factory provides, suggested provides
value to be slightly bigger than some the factory;
F8.10=170, the equipment factory provides, spatial core reel
diameter;
F8.12=170, curls the diameter replacement to use, with F5.03
(multi-purpose 端子 X3) = 12, curls the diameter to reposition 1
instruction coordination use;
F8.16=170, when TD3300 frequency changer preliminary start
calculates the frequency changer output torque to use;
F8.17=0, to, because receives the volume electrical machinery to
be at the electrically operated condition, the moment of force output
should be consistent with the rotational speed direction, namely is
approaching.
After parameter establishment equipment movement better, the
customer reflection along with the volume diameter increase, the
tensity is more and more small, this is the volume diameter
computation result.
3.6 adds the volume diameter computation function,
the belt carries the movement once more
F8.08=1, hypothesis volume diameter origin choice line
speedometer algorithm;
FC.00=2, the AI2 hypothesis, comes independently to tow
frequency changer TD3000 AO2 (movement frequency) the mouth output.
FC.03=250m/min, the equipment factory provides, FC.00*FC.03=
works as the front speed V, the frequency changer basis formula:
D= (i*V)/(л *n) calculates the current volume
diameter;
FC.04=80 m/min, prevented the TD3300 frequency
changer does not permit in the speed lower time volume diameter
computation to cause the frequency changer output moment of force the
undulation; When the TD3300 frequency changer movement line
speed is lower than FC.04 supposes the definite value, curls the
diameter computation function to stop, maintenance current volume
diameter value; When the TD3300 frequency changer movement line
speed is bigger than FC.04 supposes the definite value, curls the
diameter computation function reto enable.
The belt carries the test once more, receives the volume process
tensity to be steady, meets the requirements. But the customer
reflected TD3300 just started when moment of force 突加 fiercer, the
paper was easy to pull, revises the F3.12 function item, caused the
TD3300 frequency changer started when torque pitch way production,
slowed down when the start the moment of force sudden change,
completely satisfied the customer to this the technological
requirement.
(Note: This system because equipment inertia smaller, the
entire process tensity is constant, has not used the inertia to make
up the function to recompense with the tensity 锥度 control
function)
4 concluding remark
After this system uses TD3000+TD3300 the frequency
conversion to receive the volume plan, scene disposition succinct,
work stable, the debugging is convenient. Actual receives the
volume effect very is ideal, the end surface reorganizes, the tensity
is stable. Is precisely based on the frequency changer TD3300
tensity control characteristic, in addition its perfect function, the
redundant reliability and the outstanding performance price compared
to, have satisfied the user regarding the spinning and weaving, the
papermaking, the metallurgy and so on each domain different request.
Reference
1st, "TD3300 Tensity Control Special-purpose Frequency
changer User Handbook" Ai Mo fresh network energy
limited company in 2002 Shenzhen
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