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…
One of my main concerns about IRF7862 is that I target 15A while 17A is their range at 25 Degrees. Pulse drain is 170A and using PWM we need to take a bit care because 15A on 50% PWM duty is actually 30A in PWM peak currents. If you manage 15A with 10% PWM duty…
Just a list of my designs targeting motors with new names so I can keep them apart. Name Voltage Ampere Driver Type MC2P12V1A 12V 1A DC Motor controller. MC3P28V2A 28V 2-2.5A 3-Phase micro controller. MC3X60V3ACAN 60V 2.5-3.5A New 3-Phase, 2-Phase or 3x Solenoid driver. Previously called MC3X3ACAN. MC4X24V15A 24V 15A (21A) Stepper, 3-Phase, 2x 2-Phase…