inverter for 120V and 600A current

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yaroslav
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inverter for 120V and 600A current

Post by yaroslav »

Hi, I want to build an inverter for 120V and 600A current, according to the reference for field-effect transistors are well suited IRFP4568 plan to use 12pcs for 1 phase, who will advise can there be low-voltage modules for high current?
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yaroslav
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Re: inverter for 120V and 600A current

Post by yaroslav »

Well, since no one advised me, I will use a n mosfet, that's how will look the whole Assembly
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Re: inverter for 120V and 600A current

Post by arber333 »

yaroslav wrote: Sat Jul 18, 2020 11:39 am Well, since no one advised me, I will use a n mosfet, that's how will look the whole Assembly
Well if you want to use mosfets you need to use transistor pair p and n to get halfh bridge for one phase. Then 3 phases...

What will you use for brains?

A
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Re: inverter for 120V and 600A current

Post by johu »

B6 bridge is all N-channel FETs not comparable to push-pull analog amplifier
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Re: inverter for 120V and 600A current

Post by mikmur »

hi yaroslav. i used igbt transistor AUIRGP50B60PD1E.
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Re: inverter for 120V and 600A current

Post by bexander »

What do you mean by 120V? Nominal or maximum voltage?
The FET mentioned IRFP4568 has a 150Vdss which leaves a small margin for voltage spikes. To be more safe I would look for closer to 200V transistors.
One option could perhaps be IRFP4668PBF.

If you want to use modules I think IGBT:s are the way to go. FET-modules tend to be very pricey for there performance.
Maybe source two toyota inverters and parallel the power stage MG1+MG2+MG1+MG2? Or one lexus RX450h inverter with all three powerstages in parallel?
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Re: inverter for 120V and 600A current

Post by yaroslav »

bexander wrote: Sat Jul 18, 2020 4:15 pm What do you mean by 120V? Nominal or maximum voltage?
The FET mentioned IRFP4568 has a 150Vdss which leaves a small margin for voltage spikes. To be more safe I would look for closer to 200V transistors.
One option could perhaps be IRFP4668PBF.

If you want to use modules I think IGBT:s are the way to go. FET-modules tend to be very pricey for there performance.
Maybe source two toyota inverters and parallel the power stage MG1+MG2+MG1+MG2? Or one lexus RX450h inverter with all three powerstages in parallel?
The voltage of the batteries 120v, I took as a basis. Transistors at 200 volts so that there was a reserve. I thought that there are transistors for such currents, but while I will parallel as on the Board to collect 12 pieces, I think igbt for high voltage is good to use
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Re: inverter for 120V and 600A current

Post by yaroslav »

Hi all, I collected an inverter, but have difficulties, asking for help from the forum, can someone tell me, when working on the phases of the motor is very dirty sine, I suppose this is due to improper PCB layout and sub-zero tires, how to connect the drivers to the gates of a large number of field-effect transistors?
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Re: inverter for 120V and 600A current

Post by Thatguyoverthere »

Can you post a picture of the waveform you see? Also check out this paper on oscillation between paralleled MOSFETS.

https://toshiba-semicon-storage.com/con ... E-02_E.pdf
https://github.com/kaelinwilson
Leaf Motor/Gen1 Camry Inverter
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Re: inverter for 120V and 600A current

Post by yaroslav »

I took the signal with an oscilloscope, maybe even this is normal? But when I gave more current, it led to overheating of the transistors, one transistor in the bridge broke through due to overheating, those that are closer to the power supply are heated more than those transistors that are closer to the output terminals. I also took an oscillogram on the gates transistor, at first glance everything seems to be fine.
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Re: inverter for 120V and 600A current

Post by yaroslav »

Here is the waveform itself, and the view of the inverter itself unscrewed from the radiator
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Re: inverter for 120V and 600A current

Post by yaroslav »

Here are the signals on thHere are the signals on the gates mosfete gates mosfet
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