HV DC/AC Inverter Kit

Leah Mathew

Hi,

I read about the TI-solar HV DC/AC Inverter Kit.I found the topology to be using a transformer -less H-bridge inverter.Reading about transformer-less inverter i found a problem of leakage current.Is this relevant in a 600W system?

over 10 years ago

0 Gautam Iyer over 10 years ago

Guru 192875 points

Hi,

For a 600W based system, leakage current would be very minimal. So you don't have to worry about it. Yes when the system rating increases to 5KVa and up, you'll surely face such problems.

Regards,

Gautam

0 Leah Mathew over 10 years ago in reply to Gautam Iyer

Prodigy 55 points

Hi,

Is there a range for the leakage current,if the system is of 3KVA?What amount of leakage current can pose a safety issue?Or is it that the leakage current only reduces the efficiency of the system?

0 Gautam Iyer over 10 years ago in reply to Leah Mathew

Guru 192875 points

Hi,

A very good morning to you, Leah; commenting on

Is there a range for the leakage current,if the system is of 3KVA?What amount of leakage current can pose a safety issue?Or is it that the leakage current only reduces the efficiency of the system?

would be very unfair because this might vary according to hardware settings. So I won't be able to generalize. Now-a-days many developers are preferring transformer-less topology for less wattage. I would suggest you to check it out by yourself :)

Regards,

Gautam

0 Leah Mathew over 10 years ago in reply to Gautam Iyer

Prodigy 55 points

Hi,

I got HV DC_AC kit and connected it to a set of PV panels followed by a solar optimizer.The optimizer feeds 400V to the Inverter(HV DC_AC Kit). But once the switch was turned on LD3 light was blinking.Showing Fault. After such a fault was detected,a debug on the board showed that the IGBT was in fail mode.

Could you suggest any reason for this failure?

0 Leah Mathew over 10 years ago in reply to Leah Mathew

Prodigy 55 points

Hi,

I got HV DC_AC Kit and connected to 350 V Supply.The quick start guide shows open loop testing with change in jumper position.But this doesnt work.Further manual states a small change in code stating to select INCR_BUILD=1 for open loop.With all this written in manual,an inquiry to the TI reveals that the code is not suitable for off grid testing.So what does the manual state?

0 Gautam Iyer over 10 years ago in reply to Leah Mathew

Guru 192875 points

Hi Leah,

I got disconnected with this thread. Please start a new thread for new queries so that its easier for me to track. Anyways, are you talking about this kit: ftp://ftp.ti.com/pub/dml/DMLrequest/Christy_FTP-10-30-12/controlSUITE/development_kits/HV_SOLAR_DC_AC_v1.1/~Docs/Quick%20Start%20Guide%20for%20Solar%20HV%20DC-AC%20Board_Rev1.3.pdf

If not, please indicate the exact kit you're working on by attaching a link to TI site.

Regards,

Gautam

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HV DC/AC Inverter Kit