Page 120/169 AFNZPxxx – DUALACE2 NEW GENERATION – User Manual
9.16 Overvoltage and undervoltage limitations
The controller performs overvoltage and undervoltage protections by monitoring
the DC-link voltage and reducing the torque profile when the voltage becomes
too high or too low.
Overvoltage and undervoltage limitations can be tuned by setting parameters
VDC START UP LIM, VDC UP LIM, VDC START DW LIM and VDC DW LIM in
the SPECIAL ADJUSTMENTS list. These parameters represent a percentage of
the nominal battery voltage.
A linear reduction of the torque profile is performed scaling it down by a
percentage from 100% to 0% depending on the sensed voltage, as depicted in
the graph below. Outside the limits defined by VDC UP LIM and VDC DW LIM
the torque profile is clamped to zero. Normal operation at full torque profile is
automatically restored as soon as the voltage goes back into the range defined
by VDC START DW LIM and VDC START UP LIM.
Overvoltage and undervoltage limitations are transparent to the user and they do
not rise any alarm.
Reduction of the torque profile based on the battery voltage
To Next Page
Loading...
Need help?
General
