openinverter forum

I'm adding some over under range detection to my code and (assuming no bugs in my code etc) note that temphs (I have it mapped to a can message like so can tx tmphs 20 0 16 1.00 0), varies wildly and quickly.

It'll start off at approx ambient and on a light throttle will be around 50, but if i nail the throttle in rises within seconds to 90+, and the settles equally as quickly when i lift off. The fluctuations are so quick and large that it's hard to believe it is measuring temperature at all.

What is the experience of others if monitoring this ?

It's like this on the Prius gen3 inverter, it's measuring the temperature of the IGBTs. It will rise and fall rapidly.

Bigpie wrote: ↑Mon Aug 21, 2023 9:35 am It's like this on the Prius gen3 inverter, it's measuring the temperature of the IGBTs. It will rise and fall rapidly.

ok - so normal

what might a sensible maximum value alert be do you think ?

Personally, I don't worry about it The Prius inverter will protect itself, can't remember if it cuts out or derates, but I've never managed to get there with my setup.

Bigpie wrote: ↑Mon Aug 21, 2023 10:10 am Personally, I don't worry about it The Prius inverter will protect itself, can't remember if it cuts out or derates, but I've never managed to get there with my setup.

I use the Yaris inverter with the same behaviour and I agree with Bigpie.

FFMan wrote: ↑Mon Aug 21, 2023 9:36 am ok - so normal

what might a sensible maximum value alert be do you think ?

I have a warning light come on at 80degC over a 10 sample average.

> I have a warning light come on at 80degC over a 10 sample average.

ok - mine was set to 65 over 10 average and kept alerting so i'll push it up.

thanks