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Old 04-05-2014, 07:20 AM   #821 (permalink)
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Originally Posted by MPaulHolmes View Post
Hello! Yes, absolutely I'm going to finish it.
I'm like 95% done with the code for it, and just need to test it and do up a board with a few corrections. I've been busy the last year with work, but I've learned so much from my job about how to use igbt modules, I'm going with 3 half bridge modules for my prototype.
...
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That's fantastic news Paul. (about the controller)
Are you using the Mitsubishi IGBT's in your prototype the same as the DC controller?

I am also interested in pre-ordering a kit.
Would it be a kit, just PCB's or a fully built controller?
Also i wouldn't mind if you added a bit more to the kit cost to go towards helping out your daughter. After all the more issues we can help you with, the more free time you will have to work your magic with the controllers.

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Old 04-05-2014, 09:53 PM   #822 (permalink)
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Pre-order

I am in for an AC kit.

If it helps - I can pre-pay.

I'm not in a hurry for delivery - won't get to it until September.
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Old 04-06-2014, 10:43 AM   #823 (permalink)
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Ya, I would like to use some 600v 600amp IGBTs. I also have 3 that are 600v 400amp. The funny thing is, the way I did the layout for the new DC controller will be very similar to the layout for the AC controller. The power section will be identical, even down to the 3 U,V,W, with a LEM Hass 300-s on each line. Only the switching scheme will be different. I just need 6 isolated supplies instead of 1.
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Old 04-08-2014, 12:34 PM   #824 (permalink)
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Resolver vs Encoder

I vote for encoder. I know it works. I've actually tested it on previous boards, the code is done, and they are way cheaper, and lighter.
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Old 04-08-2014, 07:23 PM   #825 (permalink)
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Another vote for encoder

Quote:
Originally Posted by MPaulHolmes View Post
Resolver vs Encoder

I vote for encoder. I know it works. I've actually tested it on previous boards, the code is done, and they are way cheaper, and lighter.
I have used encoders on several projects at work. They are reliable and available.

The last time I used a resolver was in 1996 or maybe 1997. The client wanted to keep their old spare parts, their techs knew how to keep them running. So we put in a new system with resolvers. They worked OK. The client already had them, so I don't know about costs.
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Old 04-09-2014, 02:44 AM   #826 (permalink)
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Resolver vs Encoder

I vote for encoder. I know it works. I've actually tested it on previous boards, the code is done, and they are way cheaper, and lighter.
+1 vote for the encoder.
The encoders are likely to have less issues in the application where we are going to use them. Electric vehicle engine (motor) bays are a noisy electrical environment and imagine any analogue device is going to suffer but especially so if they are mounted close to the motor.
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Old 04-09-2014, 05:18 PM   #827 (permalink)
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Good to see activity again. I'm a lurker waiting for you electronics gurus to do your thing and then you can add me to the list of people wanting to buy components. Keep up your efforts. All the best.

Nigel.
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Old 04-11-2014, 08:46 AM   #828 (permalink)
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Ugh! I still have hundreds of pages of dc controller stuff to read, and now I notice this thread.
So much interesting stuff to read! I'm finding it hard to keep my attention foc... Hey! Squirrel!
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Old 04-11-2014, 09:06 AM   #829 (permalink)
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Astro! The IGBTs got here either yesterday or the day before! hurray!! I can't remember now. but hurray!!!!! Criley, there's also the frequently hilarious Paul and Sabrina's cheap EV conversion, or something like that, on here somewhere. I"ll have to find it. Warning, there's a lot of making fun of Oprah in it. haha.
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Old 04-11-2014, 10:04 AM   #830 (permalink)
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Astro! The IGBTs got here either yesterday or the day before! hurray!! I can't remember now. but hurray!!!!!
Fantastic, thanks for letting me know.
I will give the eBayer some positive feedback.

So what do you need next?
I can purchase stuff and have it sent to you or i can PayPal you some cash so that you can order things.

Astro (Member of the Paul and Sabrina cheer squad)

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