Toshiba TOSVERT VF-AS1 Series Manuel utilisateur

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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

dated without an

notice.

Ｅ６５８１９４７

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

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

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

Ｅ６５８１９４７

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

educed

Motor speed [5Hz/div]

Motor torque

[50%/div]

Motor current

[20%/div]

Ｅ６５８１９４７

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%

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

Ｅ６５８１９４７

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)

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

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