E6581301

E-16

5
5.7 Manual torque boost–increasing torque boost at low speeds

XD

XDXD

XD : Manual torque boost 1

Output voltage
Base frequency voltage 1 XNX
[V]/[%]
Output frequency [Hz]
XD
Base frequency XN
0
[Parameter setting]
Title Function Adjustment range Default setting
XD Manual torque boost 1 ~ % According t o model Refer to page K-48.
"
This parameter is valid when
RV
=
(Constant torque character istics),
(square reducti on torque),
(V/f 5-point set ting).
Note:
The optimum value is programm ed for each inverter c apacity. Boosting torque exc essively may cause t he inverter
to trip because of an overcurren t. If operation is rep eated with torque boos ted excessively, electroni c devices in the
main circuit may be damaged, so if high starting torque is needed, it is rec ommendable to use v ector control.
Refer to 5.6 selection 3) and 4).
If necessary, set the amount of torque to be boosted, as a guide, within +2% of the fa ctory default setting.
5.8 Base frequency

XN

XNXN

XN : Base frequency 1

XNX

XNXXNX

XNX : Base frequency voltage 1

Note: This is an important parameter that determines the constant torque control area.
Output voltage
Base frequency voltage 1 XNX
[V] Output frequency [Hz]
0 Base frequency XN
[Parameter setting]
Title Function Adjustment range Default setting
XN Base
frequency 1 ~ Hz Inverter with a model number ending with -WN, HN: 
-WP: 
XNX
Base
frequency
voltage 1
200V class: ~ V
400V class: ~ V
200V models: 
400V models:
Inverter with a model number ending with -WN, HN:
-WP: 
Note: The output frequency is limited to a frequency 10.5 times as high as t he base frequency (XN). Even if the
maximum frequency (HJ) or the upper limit frequency (WN) is set above this f requency, this limitation is
imposed on the output frequency.
• Function
If torque is inadequate at low speeds, increase torque by raising the torq ue boost rate with this parameter.
• Function
Sets the base frequency and the base frequency voltage in conformance with l oad specifications or the motor's
rated frequency.