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E-17
5.10 Control mode selection
Motor control mode selection
Parameter setting
Title Function Adjustment range
Default setting
Motor control
mode selection
: Constant torque characteristic
: Square reduction torque characteristic
: Automatic torque boost
: Sensorless vector control (speed)
: 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)
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.
To further increase the torque, use the manual torque boost parameter .
=> Refer to 5.1.2 for details.
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.
Base-frequency voltage #1
Output frequency [Hz]
Base frequency #1
0
Output voltage [V]