marcos
1 kW
- Joined
- Nov 19, 2016
- Messages
- 348
Hi hackey,
you won't go too far with 2 TO-247 in parallel. That package can withstand around 80A (some a bit less, some a bit more), no matter what crazy silicon figure the datasheet tells you, you can't go higher because the package legs are limiting you, at 90A the temperature will rise like crazy in just a couple of seconds, so thats already a peak Amps value.
If you want to flow 500A, you need many devices in parallel. I imagine >8, and paralleling devices is super difficult to achieve. Also at those current levels the noise will be unworkable without an isolated topology.
If you want to get it done easily, I would decrease your phase current requirements by increasing the voltage. EconoDual modules can manage 300A very well, and even if they are meant for 400V you can use them at 200V. You are wasting silicon, but not wasting your time :wink:
About DC links, the best reference document out there is HighHope's: https://endless-sphere.com/forums/viewtopic.php?f=30&t=31804&start=50#p839118
Besides capacitance and technology (PP film, electrolytic), a critical aspect of the DC link is the stray inductance which depends on how you build it (see my comments to Abricosvw)
I am working in a DC link capacitor for the EconoDual inverter, but for now I've been using modules like this one B25655P4607J011.
you won't go too far with 2 TO-247 in parallel. That package can withstand around 80A (some a bit less, some a bit more), no matter what crazy silicon figure the datasheet tells you, you can't go higher because the package legs are limiting you, at 90A the temperature will rise like crazy in just a couple of seconds, so thats already a peak Amps value.
If you want to flow 500A, you need many devices in parallel. I imagine >8, and paralleling devices is super difficult to achieve. Also at those current levels the noise will be unworkable without an isolated topology.
If you want to get it done easily, I would decrease your phase current requirements by increasing the voltage. EconoDual modules can manage 300A very well, and even if they are meant for 400V you can use them at 200V. You are wasting silicon, but not wasting your time :wink:
About DC links, the best reference document out there is HighHope's: https://endless-sphere.com/forums/viewtopic.php?f=30&t=31804&start=50#p839118
Besides capacitance and technology (PP film, electrolytic), a critical aspect of the DC link is the stray inductance which depends on how you build it (see my comments to Abricosvw)
I am working in a DC link capacitor for the EconoDual inverter, but for now I've been using modules like this one B25655P4607J011.