DTI HV-500 - Current Limit Reduction; Current Limit vs. IGBT Temperature

HV-500 TECHNICAL DESCRIPTION (BETA VERSION)
6
Revision 1.31
CURRENT LIMIT
REDUCTION
Maximum stepless AC current
limit depending on the IGBT
temperature in order to protect
them from damage.
POWER LOSS
The dissipated power depends on:
• PWM switching frequency
• AC frequency (motor rotation frequency)
• AC current
• AC voltage
• DC voltage
With a calculated example we demonstrate the power loss of the inverter. Power loss can be seen
compared to AC current.
Power loss calculated with the following inputs:
DC voltage:
370 V
Motor KV:
13 [RPM/V]
PWM switching frequency:
10.000 Hz
AC electric frequency:
20.000 Hz (2000 RPM with EMRAX)
0W
500W
1000W
1500W
2000W
2500W
3000W
0A 100A 200A 300A 400A 500A 600A
Total power loss