5-5
5-2 Operation in Vector Control
The Inverter in vector control mode calculates the vector of the operating
condition of the motor. Then the 150% rated output torque of the motor is
providedatanoutputfrequencyof1Hz.Vectorcontrolprovidesmorepow-
erful motor control than V/f control and makes it possible to suppress
speed fluctuation with changes in loads.
Tooperate the Inverter in vector control mode, besure toset thefollowing
parameters.
n036 (rated motor current), n106 (rated motor slip), n107 (motor wire-to-
wire resistance), n110 (motor no-load current)
H Setting the Rated Motor Current (n036)
·Check the motor nameplate and set this parameter to the rated current.
·This parameter is used asavectorcontrol constant. Be sureto setthe parameter cor-
rectly.Thissetvalueisalsousedfordeterminingtheelectronicthermalcharacteristics
to protect the motor from overheating. The correct set value protects the motor from
burning that may result from overloading.
n036 Rated Motor Current Register 0124
Hex
Changes during
operation
No
Setting
range
0.0% to 150% (A) of rated
output current of the Inverter
Unit of
setting
0.1 A Default setting See note
Note The default setting for this parameter is the standard rated current of the maxi-
mum applicable motor.
H Setting the Rated Motor Slip (n106)
·Set the rated motor slip in n106.
·This parameter is used asavectorcontrol constant. Be sureto setthe parameter cor-
rectly. This set value is used for slip compensation as well.
·Calculate the rated motor slip value from the rated frequency (Hz) and rpm on the
motor nameplate by using the following formula.
Rated slit value (Hz) = Rated frequency (Hz) -- Rated rpm x Number of poles/120
n106 Rated Motor Slip Register 016A
Hex
Changes during
operation
Yes
Setting
range
0.0 to 20.0 (Hz) Unit of
setting
0.1
Hz
Default setting See note
Note The default setting for this parameter is the standard motor slip of the maximum
applicable motor.
Basic Operation Chapter 5
To Next Page
Loading...
