SSD 605C Product Manual - page 84
6-18
Programming Your Application
605C Frequency Inverter
CURRENT FEEDBACK
This function block allows the user to
match the Inverter’s current rating to the
motor under control. The Inverter needs to
be programmed with the motor full-load
and no-load (magnetising) rms line
current values.
From this information, magnetising (flux
producing) and torque producing motor
current diagnostics can be generated.
MMI Menu Map
1 SETUP PARAMETERS
2 FUNCTION BLOCKS
3 MOTOR CONTROL
4 CURRENT FEEDBACK
FULL LOAD CALIB
NO LOAD CALIB
POWER FACTOR
QUADRATIC TORQUE
MOTOR CURRENT
MOTOR CURRENT
I MAGNETISING
I MAGNETISING
I TORQUE
I TORQUE
LOAD
FIELD
CURRENT FEEDBACK
MOTOR CURRENT
[ 66] –0.00 %
MOTOR CURRENT
[ 67] –0.0 A
I MAGNETISING
[ 68] –0.00 %
I MAGNETISING
[ 69] –0.0 A
I TORQUE
[ 70] –0.00 %
I TORQUE
[ 71] –0.0 A
LOAD
[ 72] –0.00 %
FIELD
[ 73] –0.00 %
**2.0 A – [ 64]
FULL LOAD CALIB
–
**1.4 A – [ 65]
NO LOAD CALIB
–
** 0.70 – [242] POWER FACTOR
–
FALSE – [ 50]
QUADRATIC TORQUE
–
Parameter Descriptions
FULL LOAD CALIB
Range: 0.0 to 1000.0 A
Set this to the motor nameplate full-load rms line current. The parameter is internally clamped
within the range of 25% to 100% of the Inverter current rating.
NO LOAD CALIB
Range: 0.0 to 1000.0 A
Set this to the motor no-load rms line current. This is normally between 30% to 40% of the
motor nameplate full-load rms line current. However for small motors this proportion can be
much higher. If in doubt, this information can be obtained from the motor manufacturer.
Alternatively, the parameter should be set to rms line current drawn from the Inverter when
running the motor under no-load at base frequency.
The value of NO LOAD CALIB is internally clamped in the Inverter to be within 10% to 90%
of the FULL LOAD CALIB setting.
POWER FACTOR
Range: 0.50 to 0.95
Set this to the motor power factor rating given on the nameplate.
QUADRATIC TORQUE
Range: FALSE / TRUE
When TRUE, selects higher continuous rating with less overload capability. Quadratic Torque
operation is especially suited to fan or pump applications.
Note: Sensorless Vector operation is automatically disabled when using the Inverter in
Quadratic Torque mode. Refer to Quadratic Torque Selection, page 6-84.
MOTOR CURRENT
Range: xxx.xh % (h)
This diagnostic contains the level of rms line current being drawn from the Inverter and is seen
as a % of the FULL LOAD CALIB setting.
MOTOR CURRENT
Range: xxxx.x A
This diagnostic contains the level of rms line current being drawn from the Inverter.
I MAGNETISING
Range: xxx.xh % (h)
This diagnostic contains the level of magnetising (flux producing) rms line current component
being drawn from the Inverter and is seen as a % of the FULL LOAD CALIB setting.
I MAGNETISING
Range: xxxx.x A
This diagnostic contains the level of magnetising (flux producing) rms line current component
being drawn from the Inverter.