15P0082B8
USER MANUAL
SINUS/ISD
6 - 18/82
Functional Description
The current feedback function block processes motor line current
measurements and provides diagnostics of line current magnitude, torque
producing current and magnetic field producing current components. The
line current magnitude (the motor current measured using a current meter)
can be considered to be the vector sum of the field and torque producing
current components.
The function block requires appropriate values for full-load and no-load
motor currents to be entered. Once done, the function block will provide
measurements of:
rms line current:
I MAGNITUDE (MOTOR CURRENT)
I MAGNITUDE (MOTOR CURRENT)
rms field current component:
I MAGNETISING
I MAGNETISING
torque current component:
I TORQUE
I TORQUE.
These diagnostics are presented in Amps, and as a percentage of the user set motor full-load current.
In addition, the field current component is re-scaled to provide a FIELD diagnostic. A value of 100.0% in the field
diagnostic indicates that the motor is operating at rated flux. The torque current component is re-scaled to
provide a LOAD diagnostic. A value of 100.0% in the load diagnostic indicates that the motor is operating at
rated torque or full load.
I TORQUE
I TORQUE
Range: xxx.xh % (h)
This diagnostic contains the level of torque producing rms line current component being
drawn from the inverter and is seen as a % of the FULL LOAD CALIB setting.
I TORQUE
I TORQUE
Range:xxxx.x A
This diagnostic contains the level of torque producing rms line current component being
drawn from the Inverter.
LOAD
LOAD
Range: xxx.xh % (h)
This diagnostic is a normalised version of the I TORQUE diagnostic. A value of 100%
indicates the motor is operating at rated load (torque).
FIELD
FIELD
Range: xxx.xh % (h)
This diagnostic is a normalised version of the MOTOR CURRENT diagnostic. A value of
100% indicates the motor is operating at rated magnetic flux (field).
I TORQUE
I MAGNETISING
MOTOR CURRENT
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