Control Mode Selection - Toshiba TOSVERT VF-A7 Instruction Manual

5.10 Control mode selection


Function
The VF-A7 has the following V/f control modes:
Constant torque characteristic
Variable torque mode
Automatic torque boost *1
Sensorless vector control (speed) *1
Automatic torque boost + automatic energy-saving
Sensorless vector control + automatic energy-saving *1
V/f 5-point setting
Sensorless vector control (torque/speed switching)
PG feedback vector control (torque/speed switching)
PG feedback vector control (torque/position switching)
(*1) The automatic control parameter automatically sets this parameter and the
auto-tuning parameter at a time.
Parameter setting
Title Function
Motor control

mode selection
1) Constant torque characteristic (Normal way of use)
[Set the motor control mode selection  at (Constant torque characteristic)]
Usually, this control mode is used for loads, such as belt conveyers and cranes, that
require the same torque as that produced at the rated speed, even at low speeds.
Base-frequency voltage #1
Output voltage [V]
To further increase the torque, use the manual torque boost parameter .
Motor control mode selection
: Constant torque characteristic
: Square reduction torque characteristic
: Automatic torque boost
: Sensorless vector control
: Automatic torque boost + automatic energy-saving
: Sensorless vector control (speed) + automatic energy-saving
: V-f 5-points setting
: Sensorless vector control (torque/speed switching)
: PG feedback vector control (speed/torque switching)
: PG feedback vector control (speed/position switching)


0
Base frequency #1 
Adjustment range
(speed)
=> Refer to 5.1.2 for details.
E-17
Default setting

Output frequency [Hz]