• Howdy! we're looking for donations to finish custom knowledgebase software for this forum. Please see our Funding drive thread

Search results

Date Relevance Most replies

  1. mxlemming

    Design/Build a flyback converter

    I got a spare 5 hours to design a flyback and a few months later an evening and a half empty weekend to mess about with it. Goal was not to make anything special, just to work out how flyback works, demystify it etc. I used an NCP1377B control chip to allow up to 300kHz switching, a 250V...
  2. mxlemming

    GaN and IMS MESC controller boards

    So I want to share some new controllers I have been working on. I am umming and erring about opening the source, since basically no one built my last controller, which works great... If you actually want to build one, perhaps PM me for gerbers. If you want to DIY a controller, try the MP2/CCC...
  3. mxlemming

    Making a DCDC converter

    I'm really not sure why I'm doing this so it'll get kicked to the wayside first of all my projects. Inspired by zombiess DCDC thing, I decided to quickly lay out a DCDC controlled by an stm32 (literally the cheapest stm32 made) and an ir2184 gate driver with external FETs. I got 5 of them from...
  4. mxlemming

    AT12070 motor (similar to many 12070, 12090... motors)

    I bought this from ant innovation technology. Similar ones are available from freerchobby etc but Arvin at ant was very forthcoming and useful so got the business. Quick write up as requested. Not yet on my bike, that'll come later. Copper fill is not huge, but the resistance is low and this...
  5. mxlemming

    Building a motor

    So after completely failing to get Neumotors to sell me a motor (I really can't see what is so damned hard about 8038, 70kV, extended shaft version preferably with a keyway... any keyway will do...) and being 21 emails deep with Lisa Talia and still zero progress... I think I might try building...
  6. mxlemming

    2/4 Turnigy battery packs suddenly died?

    I was out riding with a friend, we'd wired up 4x identical high discharge turnigy rapid 140C 4s2p rc packs to power his bike in 16s, I was using my usual 13s3p Samsung pack. We started with the packs all equal, all charged to 4.1V... I have a photo of this actually since I'd WhatsApp'd him a...
  7. mxlemming

    Giant Trance Belt drive with MESC @ few kW

    I normally hang out in the motor technology section, but a number of people have been hankering to see my messy Giant trance. This thing is more of a test rig for the MESC, though I commute on it frequently, and go blatting around the countryside for fun... Without further ado... The current...
  8. mxlemming

    Direct Torque Control insights and examples?

    I've been looking for a while now for DTC examples. It seems to be very much proprietary and locked up in ABB and a few others inverters. I see little objective evidence that it's any better than FOC, and also very little in terms of how it actually works... All the academic papers seem to be...
  9. mxlemming

    I just had a crack at a through hole power stage

    Hi all, It still seems to be the rage to make up through hole power stages still, so I thought I'd have a go at it myself. All the cool kids are doing it. Right? Started it at 5pm this afternoon and got this far just before dinner at 8:30, so not much time invested so far. If anyone is...
  10. mxlemming

    Battery max instantaneous regen/other solutions

    Hi all, So I really really need more brake power on my Ebike. Im running 13s3p currently with Samsung 30Q cells and swapping between my esc and a Flipsky VESC 4.2. Motor is APS8072, 50kV. Power is awesome, I've geared it to get to about 20-25mph, and set up the VESC for 60amps max current...
  11. mxlemming

    New ground-up ESC - MESC_FOC_ESC

    Edit: update March 2021: Page 5 for 187A double pulse testing at 16s Page 4 for ~60A phase for a minute without heatsink Design has moved to 4 layer board since jlcpcb price difference became negligible FOC implemented, running well on limited testing with ebike. Current waveforms page 5. Edit...
  12. mxlemming

    SH367008 13S BMS anyone?

    Hi Endless Sphere, Has anyone used one of these? I started out trying to make a 13s pack using the TI BQ76940, then found what I thought was exactly what I was about to design online on Amazon. for 8GBP (11USDish)... So I thought what a waste of KiCAD time me doing this... and ordered it. Of...
Back
Top