Manky Monkey
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« Reply #15 on: November 13, 2014, 10:27:32 AM » |
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Show us some piccies then matey.  |
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On the last freedom moped out of Nowhere City.
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minimutly
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« Reply #16 on: November 13, 2014, 06:06:47 PM » |
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Lol, the inverter or trike?
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Manky Monkey
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« Reply #17 on: November 13, 2014, 07:24:44 PM » |
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Both!
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On the last freedom moped out of Nowhere City.
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minimutly
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« Reply #18 on: December 12, 2014, 10:34:57 PM » |
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I'm guessing my last post on this was at least 2 weeks ago? Anyway, the driver board issue was more serious than I thought, I eventually moved it onto a spare drive which I had on the bench - much easier to work on.
Once the power supply issues were sorted out it became clear that most (all but one) opto isolators were shot. I stripped some out of a spare board, soldered some ic bases in and plugged them in, fully expecting success. It turned out to be anything but, said opto isolators were a different type, and not a direct swap.
The long and short of it was I had to modify the bases again.
Well tonight I had all the lamps pulsing at the right frequency, at the same voltage. I guess I should put a scope across them to make sure all is well, we'll see tomorrow. Closer than I've been to date....
Emptied to go for it.
Huw
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Manky Monkey
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« Reply #19 on: December 13, 2014, 12:09:35 AM » |
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You're making this stuff up, right?
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On the last freedom moped out of Nowhere City.
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triker_Chewie
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Posts: 1712
west aussie dreamer
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« Reply #20 on: December 13, 2014, 11:57:03 AM » |
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im an electrician and i caught most of that as english. what are you Huw an erectrical gingerbeer?
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I hate when people compare Lemmy with God, i know he is great but he is not gonna be Lemmy, ever If your Dad hasnt got a beard, you've got two Mums there's no point it lookin' pretty if we can't drive it.
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minimutly
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« Reply #21 on: December 13, 2014, 05:20:41 PM » |
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Yeh, long time ago did an mod apprenticeship in electronics, plus some other qualifications. A little rusty now though.
Scoped all the driver signals out, looks good, 4v square waves all around. Fingers crossed will have it running later.
Huw
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minimutly
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« Reply #22 on: January 10, 2015, 10:21:26 PM » |
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Sort of qualified success!
Had the inverter running, went in for tea doing cartwheels, came out later it had stopped...
So, fed up with sitting on the floor (the inverter is wall mounted, quite low), I decided to switch my attentions to an identical, but lower powered unit which runs my lift. This is much easier to work on, uses identical circuit boards, but lower power thyristors and less capacitors.
After much testing and repairing of driver and the analogue board, I had the lift running. Then it failed, then I changed another driver FET , and today, success - lift motor runs!
So, transferred the circuit boards to the big inverter - still no good. Another blown thyristor.
So now I'm out of thyristors. however, these are dual units, built together in one block. tonight I've mounted two units, one with failed cathode, one with failed anode side by side, using the good half of each one.
Tomorrow I'll know if this has worked...
I'm getting pretty peed off with this faring about, but it has its plus points - if I can locate suitable replacement (modern) gate turnoff thyristors, I'll allways be able to fix these. If I go and spend a thousand pounds on a new one and it fails a year later I'm stuffed.
Wish me luck
Huw
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Manky Monkey
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« Reply #23 on: January 10, 2015, 10:25:22 PM » |
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Huh?
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On the last freedom moped out of Nowhere City.
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morrag
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Carpe diem!
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« Reply #24 on: January 10, 2015, 11:27:40 PM » |
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As you well know Mr. M, gate turnoff thyristors are SCR's that can be switched off, as well as on, therefore.....................come to think of it Mr. M, and by your own admission re. the complexities of wiring such items as hazard lights, maybe not..  , ho, hum, what about steam power, now theres the future,alright, I'm on my way....... |
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Beware the Ides of March, But!
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BikerGran
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Posts: 10604
Gran Turismo
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« Reply #25 on: January 11, 2015, 03:46:47 PM » |
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Huh?
What he said! |
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You don't stop havin fun because you get old - you get old if you stop havin fun!
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BikerGran
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Posts: 10604
Gran Turismo
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« Reply #26 on: January 11, 2015, 03:48:00 PM » |
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I looked it up for you Manky, here y'go - it's as clear as mud! http://en.wikipedia.org/wiki/Thyristor |
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You don't stop havin fun because you get old - you get old if you stop havin fun!
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Manky Monkey
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Posts: 55102
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« Reply #27 on: January 11, 2015, 06:06:10 PM » |
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On the last freedom moped out of Nowhere City.
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Olds
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« Reply #28 on: January 12, 2015, 01:44:23 PM » |
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I'm with MM on all this trickery stuff. I know what a few of the items that were mentioned are, but have absolutely no idea what some are, what they do or how they do it . If I can't actually see how something works then as far as I'm concerned it's either magic or voodoo.
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Getting older but no wiser! Just using bigger hammers.
The answer to most problems, fire and lots of it.
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minimutly
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« Reply #29 on: January 15, 2015, 10:23:32 PM » |
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Had some success with the inverter, miller actually ran for a minute before stopping, suspect one of the thyristors blown again. Worse, I can't find equivalents/replacements, so this might be the end of the line.
Huw
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