Toshiba Tosvert VF-S15 User Manual

E6582175
F-77
6
● The drooping control function is to operate the power-running motor at operating frequency f
1
(Hz), which is
lower than command frequency f
0
(Hz) by droop frequency Δf (Hz), when the torque current is T
1
(%). (See
the figure above.)
 The droop frequency Δf can be calculated using the following expression.
Droop frequency Δf (Hz)=base frequency vl × f320× (Torque current T
1
- f323)
 When the torque current is above the specified droop insensitive torque band (f323), the frequency is
reduced during power running or increased during regenerative braking. The figure above shows an
example of the operating frequency during power running. During regenerative braking, control is
performed to increase the frequency.
 The drooping control function is activated above the torque current set with f323.
 The amount of droop frequency Δf varies depending on the amount of torque current T
1
.
Note: If the base frequency vl exceeds 100Hz, count it as 100Hz.
Control is exercised between the starting frequency (f240) and the maximum frequency (fh).
[An example of calculation]
Parameter setting: Base frequency vl=60 (Hz), droop gain f320=10 (%)
Droop insensitive torque band f323=30 (%)
Droop frequency Δf (Hz) and operating frequency f
1
when command frequency f
0
is 50 (Hz) and torque
current T
1
is 100 (%) are as follows;
Droop frequency Δf (Hz)=vl × f320 × (T
1
- f323)
=60 (Hz) × 10 (%) × (100 (%) - 30 (%))
=4.2 (Hz)
Operation frequency f
1
(Hz) = f
0
- Δf = 50 (Hz) - 4.2 (Hz)=45.8 (Hz)
Power running

Toshiba Tosvert VF-S15 Specifications

General

Category	Inverter
Control Method	V/f control, Sensorless vector control
Cooling Method	Forced air cooling
Model	Tosvert VF-S15
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overheat
Communication Options	Modbus RTU
Overload Capacity	150% for 1 minute
Braking Unit	Built-in braking transistor
Output Voltage	3-Phase, same as input voltage
Operating Temperature	-10 to +50°C (14 to 122°F)
Storage Temperature	-20 to 65°C (-4 to 149°F)
Humidity	5 to 95% RH (non-condensing)
Altitude	Up to 1000m above sea level
Input Voltage	3-Phase 200 to 240 VAC, 3-Phase 380 to 480 VAC
Weight	Varies depending on model (e.g., 0.8 kg to 16 kg)