Emerson Commander SX - Page 59

59
ADVANCED USER GUIDE
Commander SX
IP66/Nema 4X variable speed drive
MENU 5: MOTOR CONTROL
CONTROL TECHNIQUES
3854 en - 03.2008 / b
: Motor volt per 1000 rpm (Ke)
Adjustment range :0 to 10000 V
Factory setting :98 V
Used to set the motor voltage per 1000 rpm. Is used to adjust
the current loop integral gain to prevent current peaks when
the drive is enabled with a spinning motor.
: Speed display unit
Adjustment range :0 to 2
Factory setting :1
: Disable automatic adjustment of the
switching frequency
Adjustment range :0 or 1
Factory setting :0
0 (Enabled) (Auto): In the event of increased temperature
of the IGBTs, the switching frequency is automatically
reduced.
1 (Disabled) (no): Automatic adjustment of the switching
frequency is disabled. In this case, the drive trips if the
temperature of the IGBTs is too high.
to : Not used
: q axis inductance
Adjustment range :0 to 999.9 mH
Factory setting :150.0 mH
This is the motor stator inductance in quadrature with the total
inductance Ls (5.25), used to control a salient-pole
synchronous motor.
: Gearless optimisation
Adjustment range :0 or 1
Factory setting :0
0 (Disabled) (OFF): Optimisation deactivated.
1 (Enabled) (On): Optimisation activated. Used to obtain a
more regular rotation at very low speed (the torque is lower,
but "smoother").
to : Not used
: Enable boost on starting
Adjustment range :0 or 1
Factory setting :0
0 (Disabled) (OFF): No action.
1 (Enabled) (On): In open loop mode, voltage boost on
starting (5.15) is active.
: Not used
: Low-speed switching frequency
Adjustment range :0 to 5
Factory setting :0
Used to set a switching frequency different from that set in
5.18, when the motor frequency 5.01 has reached a
threshold defined in 5.61.
WARNING:
A high switching frequency reduces the magnetic noise,
but it increases the motor temperature rise and the level
of radio-frequency interference emission, and reduces
the starting torque.
: Switching frequency change
threshold
Adjustment range :0.0 to 400.0 Hz
Factory setting :0.0 Hz
If the motor frequency 5.01 is below the threshold set by
5.61, the switching frequency selected by 5.60 is used.
Otherwise, it is the switching frequency set in 5.18 which is
active.
Reminder: F = (pp x S)/60
where F is the frequency in Hz, pp the number of poles and S
the speed in rpm.
5.34
LCD
display
LED
display
Function
0Hertz Fr
Output frequency
expressed in Hz (5.01)
1
rpm
SP
Motor speed expressed
in rpm (5.04)
2 Customised Cd
Customer unit defined
using a coefficient
determined in parameter
11.21 as follows:
Cd = 5.04
motor speed in rpm
x 11.21
5.33
5.34
5.35
5.36 5.50
5.51
5.52
5.53 5.57
5.58
5.59
5.60 LCD display LED display
02 kHz2 hH
1 2.5 kHz 2.5 hH
23 kHz3 hH
3 4.5 kHz 4.5 hH
4 5.5 kHz 5.5 hH
56 kHz6 hH
5.60
5.61