Emerson EV1000-2S0004G User Manual page 27

output
voltage
V
max
f
L
Figure 5-2 Characteristic parameters definition
The f and f are defined by F0.12 and F0.13 as upper limit
H L
and lower limit of frequency respectively.
Note
Please set fmax, fb and Vmax according to motor parameters on
its nameplate. Failing to do so may damage the motor.
F0.08 Reserved
F0.09 Torque boost
In order to compensate the torque drop at low frequency, the
drive can boost the voltage so as to increase the torque. If
F0.09 is set to 0, auto torque boost is enabled and if set at
non-zero, manual torque boost is enabled, as shown in
Figure 5-3.
output
voltage
V
max
V
b
f
z
Vb：manual torque boost
fz：cut-off freq. for torque boost
fb：basic operating freq.
Figure 5-3 Torque boost (shadow area: boost value)
Note
1. Wrong parameter setting can cause overheating of the motor or
triggers the over-current protection of the drive.
2. Refer to F0.21 for definition of fz.
3. When using synchron motor, you should select manual torque
boost, and adjust V/F curve according to the motor parameters and
application.
Range: 0.1~3600s (min) 【 6.0s 】
F0.10 Acc time 1
Range: 0.1~3600s (min) 【 6.0s 】
F0.11 Dec time 1
output
frequency
f
max
t
1
Figure 5-4 Acc/Dec time definition
Acc time is the time taken for the motor to accelerate from 0
Hz to the maximum frequency (as set in F0.05) , see t
Figure 5-4.
output
frequency
f f
f
max
b H
Range: 0~30.0% 【 0.0% 】
output
freq.
f
b
Vmax：Max output voltage
time
t
2
EV1000 Series General Purpose Variable Speed Drive User Manual
Dec time is the time taken for the motor to decelerate from
maximum frequency (F0.05) to 0 Hz, see t
EV1000 has four pair of acc/dec time. Here we only
introduce acc/dec 1. Please find acc/dec time 2~4 in section
5.4: F3.17~F3.22.
Note
The unit of acc/dec 1~4 can be selected by F9.09, the options are:
minute, second. The default is second.
F0.12 Upper limit of freq.
F0.13 Lower limit of
frequency
Please refer f
H
Note
It is possible for the actual output frequency to fluctuate within
±2.5Hz in the bus-voltage control process.
F0.14 V/F curve setting
F0.15 V/F freq. F3
F0.16 V/F voltage V3
F0.17 V/F freq. F2
F0.18 V/F voltage V2
F0.19 V/F freq. F1
F0.20 V/F voltage V1
This group of parameters defines the V/F setting modes so
as to satisfy the requirements of different loads. Three fixed
curves and one user-defined curve can be selected
according to the setting of F0.14.
If F0.14 is set to 1, a 2-order curve is selected, as shown in
Figure 5-5 as curve 1;
If F0.14 is set to 2, a 1.7-order curve is selected, as shown in
Figure 5-5 as curve 2;
If F0.14 is set to 3, a 1.2-order curve is selected, as shown in
Figure 5-5 as curve 3;
The above V/F curves are suitable for the variable-torque
loads such as fan & pumps. The user can select the curves
according to the actual load so as to achieve the best
energy-saving effects.
Vmax
in
1
Chapter 5 Parameters
Range: upper limet~max. output
frequency 【 50.00Hz 】
Range: 0~upper limet of frequency
【 0.00Hz 】
and f in Figure 5-2.
L
Range: 0~3 【 0 】
Range: F0.17~F0.06 【 0.00Hz 】
Range: F0.18~100.0% 【 0.0% 】
Range: F0.19~F0.15 【 0.00Hz 】
Range: F0.20~F0.16 【 0.0% 】
Range: 0~F0.17 【 0.00Hz 】
Range: 0~F0.18 【 0.0% 】
Output voltage(V)
0
3
2
1
Output frequency(Hz)
0
Fb
Vmax ： Max output voltage(F0.07)
Fb ： Basic operating frequency(F0.06)
Figure 5-5 Torque-reducing curve
25
in Figure 5-4.
2