Current sensors are a challenge due to noise as you need to grab PWM signals. I am doing 2 things here: I am grabbing both current sensing and ground from the same place. directly on each side of the shunt. The EDA I use will try to include this in a ground plane, so I…
One of the main concern if you want to get 50A out is the current path and making sure it support 50A. The line in red show an actual example path that will have to support this. The entire driver area is only 40mm x 25mm. 60V in using top PCB lane down, over high…
Bummer – just received my USB/CAN adapter PCB’s and realized that they are wasted. Soldered one up, but as I intended to activate USB I realized 2 things: (1) HSI can only be clocked up to 36Mhz and (2) USB will only work with HSE (External Crystal). I have these small Murrata ceramic Crystals that…
Ordered 50x on Friday that arrived today( 5 days later) sent from US. Costed me less than available deals on AliExpress – actually discovered that Arrow have very decent prices on MOSFET’s – well done!
This is a mock up of routing 50A out from a small PCB with 2 layers. I use 3mm wire as “high side” shunt on bottom to get to the right where I can connect 3-Phase. This leaves MOSFET’s and current shunt’s on top. I also get heat-sink if needed on top covering both MOSFET…
I have always liked shopping at AliExpress because I get samples at 1x cost. If I buy from a distributor I end up paying 2-3x. The exception was IRF7862 that cost more for fakes than originals from Arrow for some reason. I actually realized that Arrow have very decent pricing on MOSFET’s, so might have…
Looking for Power MOSFET’s I found (and bought) some Toshiba ones in SOP-8 format supporting 60V and 160A with 1.9mOhm RDS. This makes me believe I can make a very, small motor stick that can support 50A or higher with a little heat-sink and 30A without a heat-sink. Power dissipation is 4.75W at 50A, and…
I bought this kit consisting of a C28027F launchpad and a booster for DRV8301 with 10A MOSFET’s some time ago. Costed me a fortune in P&P and Tax. I have never done anything With it, but as Code Composer now is free I thought I should give it a try since I plan using DRV8301.…
This is a mechanical mock-up made in PowerPoint just to illustrate some ideas. I move MCU and Gate Driver Logic (DRV8301) to a separate controller board that can be reused. This will require a clever interface between controller and driver, but be generic for 60V designs of some size. On this we can add bread-board…
This ESC support 120V and 500A which basically is a 60KW Motor Driver costing ca 500.- USD. I see motors delivering 80KW for 1000.- USD. You can probably find larger than this as well. Some of the ESC’s even have water cooled heat sink to get size down. 100 x 200 x 30mm seems to…