Need new approach to LORESAMP

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ZKnightfx
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Joined: Thu Aug 26, 2021 7:46 am
Location: Los Angeles

Need new approach to LORESAMP

Post by ZKnightfx »

I can't seem to get past this issue
I have a em61 motor and a Gen 2 inverter from nissan leaf with a Rev3 board
I have double and triple checked my resolver wiring, and no matter what I do I get a loresamp.
The current readings are attached, I cannot seem to fix this, I'm on my second revision 3 board, and it gives me more info than the previous unit which I screwed up through mis-wiring the DC switch.
I've posted on this forum before and get little response. I've searched the hell out of it and haven't been able to locate a solution. If anyone is in Los Angeles I'll offer brews and some bills to get their insight on how I might solve this. It's been too long and if I can't see any results I'm going to have to abandon the openinverter route, which is sad, because I really appreciate an open-source approach but perhaps this is just a bit above my skill level.
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johu
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Re: Need new approach to LORESAMP

Post by johu »

You can try debugging it with a multimeter but scope would be better. Also you're running sine variant which won't run the motor, you need FOC. But resolver code is the same none the less.
a) is excitation generated? (Multimeter in AC mode should show about 3V, scope should show 4.4 kHz sine wave 9V peak-to-peak)
b) do both sin and cos returns show a feedback signal? (Same frequency, lower amplitude, dependant on motor angle)
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ZKnightfx
Posts: 10
Joined: Thu Aug 26, 2021 7:46 am
Location: Los Angeles

Re: Need new approach to LORESAMP

Post by ZKnightfx »

Thank you for your response. I did not realize that the FOC was the necessary version. I'll start there and then double check the signals with my AC multimeter as well as my cheap oscilloscope, which I'm not terribly experienced with. I appreciate your response, as well as your efforts in this whole thing. I really have learned a ton and admire this project.
ZKnightfx
Posts: 10
Joined: Thu Aug 26, 2021 7:46 am
Location: Los Angeles

Re: Need new approach to LORESAMP

Post by ZKnightfx »

As is always the case, WIRING. That being said. I'm free of errors, but no spin yet. Will continue the troubleshoot. Thanks again.
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johu
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Re: Need new approach to LORESAMP

Post by johu »

in doubt swap sin and cos. Either physically or with pinswap.
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