AccuSine RMS current switching frequency

[Sebastian_P]

Hello

I have read something about three types of switching frequency called r1, r2 and r3 (see picture below) Can anyone tell me the meaning of them?

Thanks. 

[Yan_Zhang]

Hello Sebastian,

Good day!
r1: the frequency range which lower than IGBT switching frequency.

r2: the frequency range which around IGBT switching frequency(15kHz~21kHz).

r3: the frequency range which higher than IGBT switching frequency.

The values in the table represents the RMS value current or voltage in according frequency range.

BRs

[Sebastian_P]

Hello @Yan_Zhang 

Thanks for the answer. Im sorry if I don´t understand completly the concept, but I know that the AccuSine has one switching frecuency privided for their IGBT. So why there is three ranges called r1, r2 y r3? What is the relationship between electronics IGBT switching frecuency and r1, r2, r3? Could be that these ranges are separated by software and represents differents groups of Harmonics to compensate? 

Thanks again.

[Yan_Zhang · Accepted solution]

Hello @Sebastian_P 

Apologies for my delay reply.

We divide 3 ranges is just for help us to identify what cause the current flow into filter increase.

e.g. if r1(lower freq than r2) tripped, that would caused by some passive reactive power resonance happen.

if r2 tripped, then maybe AHF might involved resonance with some other units, and for r3, some high frequency source should be pay attention...

This "filter diagnostic" provides  a general direction for the fault.

Best Regards

[Sebastian_P · Accepted solution]

Hello @Yan_Zhang 

Thanks for the answer. Now the concept is clear for me. You have been very helpful 

Best Regards