Emerson Commander SX Advanced User's Manual page 131

CONTROL TECHNIQUES
MENU 21: OPERATING PARAMETERS FOR A SECOND MOTOR
21.09
: Motor 2 nominal voltage
Adjustment range : 0 to 480 V
Factory setting : Eur L: 200 V
USA L = 230 V
Eur H: 400 V
USA H: 460 V
Defines the voltage/frequency ratio as follows:
Output voltage
21.09
21.09
2
Boost
*
21.06
2
* If the fixed boost has been selected 5.14 = 2.
This parameter is equivalent to 5.09 for motor 1.
21.10
: Motor 2 power factor (Cos ϕ)
Adjustment range : 0 to 1.00
Factory setting : 0.85
The power factor is measured automatically during a level 2
autotune phase (see 5.12) and set in this parameter. If it has
not been possible to carry out the autotune procedure, enter
the Cos ϕ value indicated on the motor nameplate.
This parameter is equivalent to 5.10 for motor 1.
21.11
: Motor 2 number of poles
Adjustment range : 0 to 4
Factory setting : 0
0 (AUTO) (Auto)
1 (2POLES) (2P)
2 (4POLES) (4P)
3 (6POLES) (6P)
4 (8POLES) (8P)
When this parameter is at 0 (Auto), the drive automatically
calculates the number of poles according to the rated speed
(21.08) and the rated frequency (21.06). However, the
value can be entered directly as number of pairs of poles.
21.11
Motor nominal speed rpm Number of poles
1 3000
2 1500
3 1000
4 750
This parameter is equivalent to 5.11 for motor 1.
21.12
: Motor 2 stator resistance
Adjustment range : 0 to 32.000 Ω
Factory setting : 0
This parameter stores the motor stator resistance for flux
vector control mode (see parameter 5.14).
The stator resistance value is only read if 5.14 = 0.
If the stator resistance cannot be measured (motor not
connected, value higher than the max. rating) an "rS" trip
occurs.
During autotuning (5.12 = 1 or 2), the value of the stator
resistance is automatically stored.
This parameter is equivalent to 5.17 for motor 1.
ADVANCED USER GUIDE
Commander SX
IP66/Nema 4X variable speed drive
Output voltage
characteristic for
boost of less
than 6.25 %
Output
21.06
frequency
2
4
6
8
21.13
: Motor 2 voltage offset
Adjustment range : 0 to 25.5 volts
This voltage offset is measured by the drive (see parameter
5.14). It is used to correct imperfections in the drive,
especially voltage drops in the IGBTs and idle times. This
parameter plays an important role in low-speed operation, i.e.
when the drive output voltage is low.
During autotuning (5.12 = 1 or 2), the value of the voltage
offset is automatically stored.
This parameter is equivalent to 5.23 for motor 1.
21.14
: Motor 2 inductance
Adjustment range : 0 to 3200.0 mH
Factory setting : 0
During autotuning with rotation (5.12 = 2), the transient
inductance is stored in this parameter.
This parameter is equivalent to 5.24 for motor 1.
21.15
: Motor 2 map enable
Adjustment range : 0 or 1
0 (Disabled) (OFF)
1 (Enabled) (On)
21.15 changes from 0 to 1 when the motor 2 parameters are
active.
They are taken into account when 11.45 is set to 1 and the
drive is disabled or in the trip state. During drive operation,
11.45 can be set to 1, but the characteristics of motor 2 are
not taken into account. This parameter can be assigned to a
digital output, in order to control closing of the second motor
contactor when the motor 2 characteristics have been
enabled.
21.16 21.23
to : Not used
21.24
: Motor 2 stator inductance L
Adjustment range : 0 to 3200.0 mH
Factory setting : 150.0 mH
This is the motor stator inductance at rated flux.
This parameter is equivalent to 5.25 for motor 1.
21.25 21.29
to : Not used
21.30
: 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.
This parameter is equivalent to 5.33 for motor 1.
Function not available.
21.31 21.50
to : Not used
21.51
: 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 (21.24), used to control a salient-pole
synchronous motor.
This parameter is equivalent to 5.51 for motor 1.
3854 en - 03.2008 / b
S
131