Diagnostics Optimization CT MODBUS RTU Technical Data
E300 Design Guide
345
Issue Number: 1
The
Final Torque Reference
(
J27
) is converted into the
Final Current Reference
(
J20
) by applying a torque to current conversion and by applying the
Final Current Limit
(
J21
). The torque to current conversion is applied as follows:
Current reference =
Final Torque Reference
(
J27
) x Motor Rated Flux / Motor Flux.
Final Current Limit
(
J21
) is the current limit level that is applied to the torque producing current.
Current Magnitude, Total Output Current
(
J22
) is the instantaneous drive output current scaled so that it represents the r.m.s. phase current in Amps
under steady state conditions.
Percentage Load
(
J23
) gives the
Torque Producing Current
(
J24
) as a percentage of the rated torque producing current for the motor. Positive values
indicate motoring and negative values represent regenerating.
Torque Producing Current
(
J24
) is the instantaneous level of torque producing current scaled so that it represents the r.m.s. level of torque producing
current under steady state conditions.
Torque Producing Current
(
J24
) is proportional to the torque produced by the motor provided field weakening is
not active. For field weakening operation the
Torque Producing Current
(
J24
) is boosted for a given level of torque to compensate for the reduction in
the motor flux. The sign of
Torque Producing Current
(
J24
) is defined in the table overleaf.
J20
Final Current Reference
Mode
Open-Loop, RFC-A, RFC-S
Minimum
Maximum
VM_TORQUE_CURRENT
Default
Units
%
Type
16 Bit Volatile
Update Rate
4 ms write
Display Format
Standard
Decimal Places
1
Coding
RO, FI, VM, ND, NC, PT
J21
Final Current Limit
Mode
Open-Loop, RFC-A, RFC-S
Minimum
Maximum
Default
Units
%
Type
16 Bit Volatile
Update Rate
4 ms write
Display Format
Standard
Decimal Places
1
Coding
RO, VM, ND, NC, PT
J22
Total Output Current
Mode
Open-Loop, RFC-A, RFC-S
Minimum
Maximum
Default
Units
A
Type
32 Bit Volatile
Update Rate
4 ms write
Display Format
Standard
Decimal Places
3
Coding
RO, FI, VM, ND, NC, PT
J23
Percentage Load
Mode
Open-Loop, RFC-A, RFC-S
Minimum
Maximum
Default
Units
%
Type
16 Bit Volatile
Update Rate
Background write
Display Format
Standard
Decimal Places
3
Coding
RO, FI, VM, ND, NC, PT
J24
Torque Producing Current
Mode
Open-Loop, RFC-A, RFC-S
Minimum
Maximum
VM_DRIVE_CURRENT
Default
Units
A
Type
32 Bit Volatile
Update Rate
250 µs write
Display Format
Standard
Decimal Places
3
Coding
RO, FI, VM, ND, NC, PT
Содержание 03200106
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