Toshiba TOSVERT VF-AS1 Series User manual

E6581327
TOSVERT VF-AS1
Light-load high-speed operation
Instruction Manual
The technical information in this manual is provided to explain the principal
functions and applications of the product, but not to grant you a license to
use the intellectual property or any other property of Toshiba Schneider
Inverter Cor
p
oration or a third
p
art
y
.
© Toshiba Schneider Inverter Corporation 2006
All rights reserved.

E6581327
－Contents －
1．Introduction ........................................................................................................................2
2．Function .............................................................................................................................2
3．Related parameters............................................................................................................3
4．Light-load high-speed operation ........................................................................................4
4.1 Mode description............................................................................................................4
4.1.1. Automatic setting mode of high-speed operation speed (f328=1, 2)................5
4.1.2. Fixed setting mode of high-speed operation speed (f328=3, 4).......................7
5．How to adjust parameters..................................................................................................9
5.1 Automatic setting mode of high-speed operation speed................................................9
5.2 Fixed setting mode of high-speed operation speed.....................................................10
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E6581327
1．Introduction
Thank you for your purchase of the Toshiba inverter “TOSVERT VF-AS1”.
This instruction manual explains the light-load high-speed operation of VF-AS1.
2．Function
The light-load high-speed operation is used to increase the operating efficiency of the machine by
increasing the rotational speed of the motor when it is operated under light load.
This function is useful for constant-torque load applicaions which repeatedly drive light and heavy loads,
such as lifts and transfer equipment.
Since VF-AS1 has the learning function for the light-load high-speed operation, it can be easily adjusted
by executing the forward run (raising) or reverse run (falling) operation. (f328=3, 4 only)
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E6581327
3．Related parameters
Related parameters for light-load high-speed operation Vector control
Title Commu
nication
No. Function Adjustment range
Minimum
setting unit
(Panel/Com
munication)
Default
setting
Write
during
running
Speed
control
Torque
control
PM
control V/f control
A
djust
ment
(Note)
f3280328 Light-load high-speed
operation selection
0:Deselect
1: High-speed operation speed
set automatically
(Power running at F command
:Raising)
2: High-speed operation speed
set automatically
(Power running at R command
: Raising)
3: High-speed operation speed
set with f330
(Power running at F command
: Raising)
4: High-speed operation speed
set with f330
(Power running at R command
: Raising)
1/1 0
Disabled ●/●－●●－
f3290329 Light-load high-speed
learning function
0:No learning
1:Forward run learning
2:Reverse run learning 1/1 0
Disabled ●/●－－－－
f3300330 Automatic light-load
high-speed operation
frequency 30.0 to ul Hz 0.1/0.01 60.0
Disabled ●/●－●●－
f3310331 Light-load high-speed
operation switching
lower limit frequency 30.0 to ul Hz 0.1/0.01 40.0
Enabled ●/●－●●－
f3320332 Light-load high-speed
operation load waiting
time 0.0 to 10.0 sec. 0.1/0.1 0.5
Enabled ●/●－●●－
f3330333 Light-load high-speed
operation load
detection time 0.0 to 10.0 sec. 0.1/0.1 1.0
Enabled ●/●－●●－
f3340334 Light-load high-speed
operation heavy load
detection time 0.0 to 10.0 sec. 0.1/0.1 0.5
Enabled ●/●－●●－
f3350335 Switching load torque
during power running -250 to 250% 1/0.01 50
Enabled ●/●－●●◎
f3360336 Heavy-load torque
during power running -250 to 250% 1/0.01 100
Enabled ●/●－●●◎
f3370337 Heavy-load torque
during constant power
running -250 to 250% 1/0.01 50
Enabled ●/●－●●◎
f3380338 Switching load torque
during regenerative
braking -250 to 250% 1/0.01 50
Enabled ●/●－●●◎
Sensorless vector/vector with sensor (●:Effective, －:Ineffective)
Note: Parameters f335 to f338 need adjustment according to the load.
Since VF-AS1 has the learning function for the light-load high-speed operation, it can be easily
adjusted by executing the forward/reverse run operation (raising/falling for lift application).
(f328=1, 2 only)
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4．Light-load high-speed operation
4.1 Mode description
The light-load high-speed operation includes the modes below:
Each mode can be set by the light-load high-speed operation selection (f328).
Title/function Default setting Action
0:Deselect Light-load high-speed operation disabled.
1:High-speed operation speed set
automatically
(Power running at F command:Raising)
2:High-speed operation speed set
automatically
(Power running at R command: Raising)
When inverter judges to be light-load, the
high-speed operation frequency is
automatically set according to a detected
torque.
3:High-speed operation speed set with
f330
(Power running at F command: Raising)
f328
Light-load
high-speed
operation
selection
4:High-speed operation speed set with
f330
(Power running at R command: Raising)
When inverter judges to be light-load, the
operation is set to the automatic
light-load high-speed operation frequency
(f330).
Ex.: If automatic setting mode of high-speed operation speed is used,
set f328 to 1 for F (forward command): Raising
set f328 to 2 for R (reverse command): Raising
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E6581327
4.1.1. Automatic setting mode of high-speed operation
speed (f328=1, 2)
The diagram on the next page(Fig.1) is the timing chart when the automatic setting mode of high-speed
operation speed (f328=1) is applied to lift application.
At the operation frequency above the light-load high-speed operation switching lower limit frequency
(f331) (point A in the Fig.1), if a detected torque (*1) after completion of speed reach is below the
switching load torque during power running (f335 setting value), the inverter judges to be light-load.
For light-load operation, the frequency decided with the formula is determined as a target frequency
(high-speed operation frequency) and the operation is accelerated toward the target frequency. (Point B in
the Fig.1 Light-load high-speed operation)
Target frequency = (Value set with f335) × [Base frequency (vl)] / (Detection torque)
when target frequency ≦ul (≦fh)
*1: Average torque during light-load high-speed operation load detection time (f333) after light-load
high-speed operation load detection waiting time (f332) (5% or more)
Light-load detection is carried out after speed reach when an operation frequency is above the light-load
high-speed operation switching lower limit frequency (f331).
When each of conditions below is reached, the light-load high-speed operation is canceled and the
operation is returned to the frequency corresponding to a speed command value.
①If a heavy-load torque (f336) is exceeded during acceleration up to the high-speed operation
frequency.
②If a heavy-load torque during constant power running (f337) is exceeded after reaching the
automatic light-load high-speed operation frequency (f330) and after a lapse of the light-load
high-speed operation heavy load detection time (f334).
③If a speed command value less than the light-load high-speed operation switching lower limit
frequency (f331) is entered.
Note: The torque monitor at the light-load high-speed switching (detected value) is updated for every
operation.
These values can be monitored by setting the standard monitor parameter (f710) and status
monitor parameters 1 to 8 (f711 to f718).
Function Description Monitor
output
Light-load high-speed torque
monitor 1
(Detection torque monitor at
operation switching)
Average torque during light-load high-speed operation
load detection time (f333) after a lapse of light-load
high-speed operation load detection waiting time
(f332)
Setting No.
64
Light-load high-speed torque
monitor 2
(Detection torque monitor at
constant speed operation)
Average torque after reaching automatic light-load
high-speed operation frequency (f330) and after a
lapse of light-load high-speed operation heavy load
detection time (f334)
Setting No.
65
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《Example of operation》Light-load high-speed operation selection
(f328=1: High-speed operation speed set automatically): F (Raising)
Light-load high-speed operation
Heavy-load torque during
power running f336
Switching load torque
during power running
f335
B
Light-load high-speed
operation switching lower
limit frequency f331
ON
OFF
Torque (%)
A
Light-load high-speed torque monitor 1
(Detection torque monitor at operation
switching)
Monitor output setting No.64
Light-load high-speed torque monitor 2
(Detection torque monitor at constant
speed operation)
Monitor output setting No.65
UpdateUpdate
Operation frequency (Hz)
Heavy-load torque during
constant power running
f337
ON
OFF
Operation signal (F)
ON
f102
Speed reach
detection band
f102
Speed reach
detection band
Light-load high-speed operation load
detection waiting time f332
Light-load high-speed operation
load detection time f333
Light-load high-speed operation
heavy load detection time f334
High-speed operation frequency
varies with load torque.
Note:
Speed reach signal
Fig.1
Note:The torque monitor at the light-load high-speed switching (detected value) is updated for every
operation.
These values can be monitored by setting the standard monitor parameter (f710) and status
monitor parameters 1 to 8 (f711 to f718).
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E6581327
4.1.2. Fixed setting mode of high-speed operation speed
(f328=3, 4)
The diagram on the next page(Fig.2) is the timing chart when fixed setting mode of the high-speed
operation speed(f328=3) is applied to lift application.
At the operation frequency above the light-load high-speed operation switching lower limit frequency
(f331) (point A in the Fig.2), if an average torque during the light-load high-speed operation load
detection time (f333) after completion of speed reach and after the light-load high-speed operation
load detection waiting time (f332) has elapsed is below the switching load torque during power running
(f335), the inverter judges to be light-load detection and is more accelerated up to an automatic
light-load high-speed operation frequency (f330). (Point B in the Fig.2 Light-load high-speed
operation)
Load torque detection is carried out after speed reach when an operation frequency is above the light-load
high-speed operation switching lower limit frequency (f331).
When each of conditions below is reached, the light-load high-speed operation is canceled and the
operation is returned to the frequency corresponding to a speed command value.
①If a heavy-load torque (f336) is exceeded during acceleration up to the automatic light-load
high-speed operation frequency (f330).
②If a heavy-load torque during constant power running (f337) is exceeded after reaching the
automatic light-load high-speed operation frequency (f330) and after a lapse of the light-load
high-speed operation heavy load detection time (f334).
③If a speed command value less than the light-load high-speed operation switching lower limit
frequency (f331) is entered.
Note: The torque monitor at the light-load high-speed switching (detected value) is updated for every
operation.
These values can be monitored by setting the standard monitor parameter (f710) and status
monitor parameters 1 to 8 (f711 to f718).
Function Description Monitor
output
Light-load high-speed torque
monitor 1
(Detection torque monitor at
operation switching)
Average torque during light-load high-speed operation
load detection time (f333) after a lapse of light-load
high-speed operation load detection waiting time
(f332)
Setting No.
64
Light-load high-speed torque
monitor 2
(Detection torque monitor at
constant speed operation)
Average torque after reaching automatic light-load
high-speed operation frequency (f330) and after a
lapse of light-load high-speed operation heavy load
detection time (f334)
Setting No.
65
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E6581327
《Example of operation》Light-load high-speed operation selection (f328=3: High-speed
operation set with f330): F (Raising)
Heavy-load torque during
constant power running
f337
f102
Speed reach
detection band
f102
Speed reach
detection band
Light-load high-speed operation
load detection waiting time f332
Light-load high-speed operation
load detection time f333
Light-load high-speed
operation heavy load detection
time f334
A
utomatic light-load high-speed
operation frequency f330
Light-load high-speed
operation switching lower
limit frequency f331
Light-load high-speed operation
ON OFF
ON
OFF
Torque (%)
Light-load high-speed torque monitor 1
(Detection torque monitor at operation
switching)
Light-load high-speed torque monitor 2
(Detection torque monitor at constant
speed operation)
Monitor out
p
ut settin
g
No.65
UpdateUpdate
Operation signal (F)
Heavy-load torque during
power running f336
Switching load torque
during power running
f335
A
B
Note:
Speed reach signal
Fig.2
Note: The torque monitor at the light-load high-speed switching (detected value) is updated for every
operation.
These values can be monitored by setting the standard monitor parameter (f710) and status
monitor parameters 1 to 8 (f711 to f718).
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E6581327
5．How to adjust parameters
If the light-load high-speed operation is used, it is necessary to always set the motor-related parameters
(Motor constants) regardless of setting of V/f control mode selection (pt).
Refer to Section 6-22 of VF-AS1 instruction manual (E6581301) to set motor-related parameters.
In addition, for the high-speed operation fixed setting mode (f328=3, 4), the learning action allows the
light-load high-speed operation to be adjusted easily.
5.1 Automatic setting mode of high-speed
operation speed
《Adjustment method for lift application》
If the light-load high-speed operation is carried out with 60Hz of normal operation, follow the
procedure below:
①Set the parameter below at an arbitrary position of the status monitor display selection (f711 to
f718).
Light-load high-speed load torque monitor 1 Setting No.64 Ex. of LED display l20
② Carry out the power running operation while hanging a minimum load for which the light-load
high-speed operation is not wanted and check that the operation does not change to the light-load
high-speed operation (an operation frequency does not change).
If changing to the light-load high-speed operation, reduce the setting value of the switching load
torque during power running (f335).
③Similarly, carry out the regenerative braking operation while hanging a minimum load for which the
light-load high-speed operation is not wanted and check that the operation does not change to the
light-load high-speed operation (an operation frequency does not change).
If changing to the light-load high-speed operation, reduce the setting value of the switching load
torque during power running (f338).
Standard setting values of the switching load torque during power running (f335) and the
switching load torque during regenerative braking (f338) are 105% of torque monitor values
checked on the light-load high-speed load torque monitor 1 when power running/regenerative
braking operation is carried out with a maximum load for which the light-load high-speed operation
can be carried out.
④When reaching a state where it is possible to switch to the light-load high-speed operation, check
that a high-speed operation frequency changes by changing a load.
⑤Restore the parameter changed in ①to an initial value.
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