Toshiba TOSVERT VF-AS1 Series User manual

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VFAS1
Motor Control instruction manual
Confidential ㊙
This manual is the engineering fortune of
Toshiba Schneider Inverter Corporation.
All of the release, reproduction, diversion
and alteration of contents are strictly
prohibited.
The firmware will be u
p
dated without an
y
notice.

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CONTENTS
1. PARAMETERS FOR MOTOR CONTROL ..................................................................................................... 2
2. THE EFFECTIVE PARAMETERS FOR PT=2, 3,4,7,8 ................................................................................. 4
2.1 ADJUSTMENT OF SPEED LOOP GAIN ................................................................................................................4
2.1.1 Parameter setting .......................................................................................................................................4
2.1.2 parameter adjustment ................................................................................................................................4
2.2 ADJUSTMENT OF CURRENT LOOP GAIN ...........................................................................................................4
2.2.1 Parameter setting .......................................................................................................................................4
2.2.2 Parameter adjustment................................................................................................................................4
2.3 F415（FLUX ENHANCEMENT AT LOW SPEED）..................................................................................................5
2.3.1 Parameter setting .......................................................................................................................................5
2.3.2 Parameter adjustment................................................................................................................................5
2.4 F416(STALL REDUCTION AT FIELD WEAKENING AREA)...................................................................................6
2.4.1 Parameter setting .......................................................................................................................................6
2.4.2 Parameter adjustment................................................................................................................................6
2.4.3 Example of adjustment...............................................................................................................................6
2.5 F495(OVER MODULATION /MAXIMUM VOLTAGE ADJUSTMENT)......................................................................7
2.5.1 Parameter setting .......................................................................................................................................7
2.5.2 Parameter adjustment................................................................................................................................7
3. THE EFFECTIVE PARAMETERS FOR PT=0, 1 .......................................................................................... 8
3.1 CURRENT DIFFERENTIAL GAIN FOR PT=0,1....................................................................................................8
3.1.1 Parameter setting .......................................................................................................................................8
3.1.2 Parameter adjustment................................................................................................................................8

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1. PARAMETERS FOR MOTOR CONTROL
Here after is the parameter list for VF-AS1 motor control.
AS1 motor parameter list
pt control law
0,1 2 3,4 5 7,8
parameter function
0:V/f constant
1:Variable
torque
Automatic
torque boost
Sensor-less
Vector control
VF5points
(for power
supply)
Vector control
Accessible
during
running?
For what?
vl[Hz] Basic frequency 1 ★ ★1★2 ★1★2 ★ ★1★2 No V/f ratio
（rotor flux）
vlv[V] Basic voltage 1 ★ ★1 ★1 ★ ★1 No V/f ratio
（rotor flux）
vb[%] Torque boost 1 ○8 - - ○8 - Yes S
t
ator resistance
compensation
f405[kW] Motor rated power － ★1★2 ★1★2 － ★1★2 No Motor power
f406[A] Motor rated current ○9 ★1 ★1 ○9 ★1 No Motor rated
current
f407
[rpm] Motor rated speed ○9 ★1★2 ★1★2 ○9 ★1★2 No
-Rated speed
-Rotor time
constant
f410[%] Motor coefficient 1
(Torque boost) － ☆3 ☆3 － ☆3 Yes S
t
ator resistance
compensation
f411[%] Motor coefficient 2
(no load current) ○9 ☆3 ☆3 ○9 ☆3 No Magnetizing current
f412[-] Motor coefficient 3
(Leakage coefficient) ○9 ☆3 ☆3 ○9 ☆3 No Leakage coefficient
Basic
parameter
f413[%] motor coefficient 4
(Motor Slip) ○9 ☆3 ☆3 ○9 ☆3 No Slip coefficient
f401[%] Slip frequency gain － － ○4 － ○4 Yes Slip gain
f415[%] Exciting strengthening
coefficient － ○5 ○5 － ○5 No Increasing flux at low speed
f416[%] Stall prevention factor ○6 ○6 ○6 ○6 ○6 No Current limit at
field weakening
Adjust
parameter
f495[%] Max output voltage
modulation rate ○7 ○7 ○7 ○7 ○7 No Over -modulation rate
f460 Speed loop gain － ○ ○ － ○ Yes Speed loop gain
f461 Speed loop
stabilization coefficient － ○ ○ － ○ Yes
Speed loop
stabilization
coefficient
Speed loop
adjust
parameter
f462 Moment of Inertia － ○ ○ － ○ Yes Speed loop filter
Current
loop gain f458[Hz] Current loop gain ○ ○ ○ ○ ○ No Current loop gain
★：the parameter to be set mandatory
☆：the parameter to be set automatically by auto-tuning
○：the parameter to be set if necessary
－：the parameter not to be used

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★1：The parameters are set before auto-tuning, corresponding to the application motor (by motor name plate or test report).
It is necessary to set for special motor and small motor. It is also recommended to set for normal motor.
In case of p (pole pair), it is estimated by the difference between Fn and Nn, so please confirm their relation to correspond
to the slip of the applied motor.
However,
Pn : Motor rated power (F405 [kW] )
Fn : Base frequency ( vL [Hz] )
Nn : Motor rated speed (F407 [min-1] )
p : pole pair [-]
★2：Nominal torque(100%), that is referred to by torque limitation or torque reference and so on, is defined by
Pn*1000/(2*pai*Fn/p)
☆3：The parameter to be set automatically by auto-tuning. Please refer to the procedure of auto-tuning in Instruction Manual.
○4：The parameter is to adjust slip compensation. It is the rate for compensation to rated slip.
○5：The parameter is flux rate at low speed. It is for enhance output torque at low speed (first it is necessary to do auto-tuning)
○6：In case this parameter is small, the vibration of load current is reduced at field weakening area, however, motor current is
increased which cause to motor maximum torque decrease limited by load current.
○7：It is effective in the improvement of the speed stall in field weakening region.
○8：The parameter is used for the output torque performance at low speed.
○9：The parameter is referred to as the typical value for the calculation of motor parameters. Normally not need to set.
It’s better to set in case the values are known (by motor test report) for special motor as high speed motor and so on.

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2. THE EFFECTIVE PARAMETERS FOR PT=2, 3,4,7,8
2.1 Adjustment of speed loop gain
2.1.1 Parameter setting
parameter function range Default setting
F460 Speed loop gain 1～9999 12
F461 Speed loop stability coefficient 1～9999 100
F462 The filter of speed reference 0～100 35
2.1.2 parameter adjustment
Please refer to Instruction Manual E6581333 for details.
problem countermeasure Side effect
-Motor speed is overshoot after
acceleration is finished.
-Motor speed is undershoot (goes
round to opposite direction) before
deceleration stop
- F460 to be adjusted as F460= %J * 12
- To increase F460 every 2 times (up to 48)
and to decrease F461 every half at the same
time. (refer to E6581333 for details) -
- Motor is overshoot after rapid
acceleration - To increase F461 every 100 (up to 1000) -
2.2 Adjustment of current loop gain
2.2.1 Parameter setting
parameter function range Default setting
F458 Current loop gain 1～1000 0
2.2.2 Parameter adjustment
Normally not need to set.
Please refer to Instruction Manual E6581333 for details.
problem countermeasure Side effect
-Vibration of the motor or noise
caused by such the vibration in the
area where the output frequency is
around the base frequency.
- To decrease F458
from 0(*1) up to 25
(refer to E6581333 for details) -
*1 0(default) means
100 in case of the inverters of 200V-15kW or less and 400V-18.5kW or less
50 in case of the inverters of 200V-18.5kW or more and 400V-22kW or more

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2.3 F415（flux enhancement at low speed）
2.3.1 Parameter setting
parameter function range Default setting
F415 Flux enhancement rate at low speed 100%～130% 100%
2.3.2 Parameter adjustment
It is necessary to set PT=2 or 3,4,7,8 to set motor parameters from motor nameplate, and to do auto-tuning
when high output torque at low speed is needed.
If more output torque is needed after doing this procedure, to increase F415 is effective.
In case F415 is large, the magnetizing current at low speed is increased, therefore flux is increased and motor
torque is possible to increase in the limited current.
However, even if F415 is large, motor flux is not linearly increased because of flux saturation depends on the
motor characteristic.

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2.4 F416(stall reduction at field weakening area)
2.4.1 Parameter setting
parameter function range Default setting
F416 Stall reduction at field weakening area 10～250 100
2.4.2 Parameter adjustment
In case of the driving at field weakening area, motor flux is reduced therefore motor maximum torque is also
reduced. In such condition, when instant torque is obtained motor is stalled even if motor current is less than
current limitation.
There are 2 conditions for field weakening area. One is over the base frequency; the other is DC bus voltage
reduction. Especially single phase inverter, DC bus voltage is reduced in case of heavy load.
In such case, reduction of F416 every 5 is effective.
problem countermeasure Side effect
Motor is stalled in case of the driving
with input voltage reduction, or at field
weakening area
To reduce F416 every 5 Maximum torque at low speed
is reduced
2.4.3 Example of adjustment
system： INV：AS1-2007 Motor：0.4kW-200V-60Hz
input voltage：165V
Pt=3 F416=100 Pt=3 F416=50
Motor is
stalled over
50Hz
No stall
Maximum torque at low
speed
i
s
r
educed
Motor speed [5Hz/div]
Motor torque
[50%/div]
Motor current
[20%/div]

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2.5 F495(over modulation / maximum voltage adjustment)
2.5.1 Parameter setting
parameter function range Default setting
F495 over modulation / maximum voltage
adjustment
0:Normal
1 :Straight 100%
2 : 102.5%
3 : 105%
0
2.5.2 Parameter adjustment
To increase maximum torque at nominal point, increase of F495 is effective.
problem countermeasure Side effect
- Out put voltage is reduced at field
weakening area.
- Motor current is increased at field
weakening area.
To increase F495 - Motor is oscillated at field
weakening area
In this case, to decrease F458
from 0(*1) up to 25

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3. THE EFFECTIVE PARAMETERS FOR PT=0, 1, 5
3.1 Current differential gain
3.1.1 Parameter setting
parameter function range Default setting
F467 Current differential gain
0:Disabled
1:Enabled(Low gain)
2: Enabled(Middle
gain)
3: Enabled(High gain)
0
3.1.2 Parameter adjustment
To improve the motor unstable, it is effective to adjust F467 even if F467=1, especially motor unstable at no
load and small inertia condition.
The table below shows the tendency of phenomenon at each inertia and F467 conditions.
Generally, the possibility of motor vibration is increased in case inertia and F467 are both small.
inertia F467 Acceleration
performance Deceleration performance Disturbance response
small Increase vibration Increase vibration Increase vibration
small big Decrease vibration Decrease vibration Decrease
vibration
small Decrease speed
overshoot Current ripple is big Fast response
big big Increase speed
overshoot Current ripple is small Slow response