User`s manual

SECTION 1: DS2100 OVERVIEW DS2100 User's Manual
C27750-001 PAGE 1-11
1.5.4.1 RMS Protection
The RMS protection acts to limit the current provided to the rated continuous current of the drive. Thus, a G361-x006
cannot supply, on average, greater than 6A
continuous
RMS to the motor. The current to the motor is averaged and if it
exceeds the RMS rating, the drive limits the current command. If the controller continuously demands current greater
than the drive capability, the RMS protection will limit the actual current supplied to the drive rating. The time for which
peak current can be supplied is dependent on whether the motor is stalled or running.
1.5.4.2 Thermal Foldback
Thermal foldback is implemented in the DS2100 drives to prevent the junction temperatures of the amplifier bridge
IGBT’s exceeding their maximum rated temperature. The thermal foldback is based on a measure of the heatsink
temperature and the mode in which the drive is operating (motor running or stalled). As the heatsink temperature
increases, the peak current capability of the drive is reduced to ensure the IGBT die temperature cannot increase above
the device maximum rating.
For the DS2100 D size, a simple thermal shutdown is implemented. These drives will report an overtemperature fault
once the measured heatsink temperature exceeds the maximum rating of the drive.