Recent content by Mouse

This is always more tedious than I remember. Home made spool to hold the 9 strands of 0.5mm wire

Thanks for the link. It was an interesting read. I've used Nomex paper and 0.5 wire just as the original was wound with was but using 1 less turn per finger and 1 extra wire strand which is currently working out with regard to winding and available space in the slots. Time will tell if this was...

I'm making a BMX styled small framed ebike and am lacing what I think is a 1000W motor originally for a 26" wheel into a smaller 20" wheel. I bought a broken burned out motor with the intention of rewinding rather than buying a new motor and taking it apart. I'm planning of rewinding the hub...

All in hand thanks. I've got a bunch of old cooker elements that I'll cut into half (maybe thirds) so they will consume suitable power at 100V which is the full battery pack voltage if I decide to test both battery packs at the same in parallel.

Amberwolf, That might just be the voice of reason. I've been pondering actually load testing the battery packs properly and have finally admitted this is an essential part of the process. I've got a Seek thermal imaging camera module for my phone so will be able to keep track of temperatures...

Thanks, That's something to watch out for.

Ah Thanks, That's the sort of real-life feedback I'm after. Mine won't see much more than about 10-11A per cell so I guess it will be even less of a problem than what you're experiencing. I'm not sure of the actual cell model but they're from a server instillation so I expect they are not...

I'm about to make a casing for 5.6kWh, 2 X 48V 60Ah of 18650 cells as part of a motorbike conversion. What I don't have is any kind of experience of is how hot (if at all) they will get under heavy use or charging. I'm not expecting the maximum discharge to be much over 20kW or 3C and the...

Hi has anyone managed to communicate with the older Eltek H1250A power rectifiers? Or even have any links or ideas about how to communicate with them to set voltage or current etc...? They use a SPI interface unlike the newer CAN connected Flatpack2 HE ones and I cant find any specific SPI info...

Oh yea I'll be sure to do that. I'd also like to see the comparison between projects and techniques for re-appropriating Hybrid power inverters.

The power IGBT module in the Honda IMA unit are rated at something like 300A, the batteries are rated at 220A max discharge so I think the phase amps to the motor can go right up to the limit if I push it. Although I'll not be operating it right up at the limit when it's in use to make...

Yea it is part of the flywheel assembly so I'll have to make a shaft and end plates. I have a small hobby workshop and lathe so it's within my grasp and I enjoy a bit of that sort of thing one and a while. My hobby is both making things and riding motorcycles so the engineering side of things...

Yea, kind of, the original nominal voltage is 144V and the nominal pack voltage I have is 96V which is 2/3 of its original spec. But despite this it should produce the same torque up to the max RPM so it's a matter of final drive gear ratio. I can always rewind it of it's if it's wildly...

Might be worth adding the budget so far is... £75 Donor bike with log book (3 years and 8 months old!) £300 Batteries £100 Chargers £50 Honda IMA power unit £40 Honda IMA motor Total £565 I'd like to get it running and on the road for less than £800 which leaves me with about £235 for all the...

Starting a conversion of a Chinese 125 Main Components are, Direct Bikes 125cc Enduro Two 48V 60Ah 2.8kWh 13s20p 18650 server backup battery packs. Two 2kW Eltek Flatpack2 48V battery chargers. Honda IMA IPU motor controler Honda IMA flywheel motor, approx 20hp I'm working to a very limited...