Prototyped and tested for functionality. Successfully controlled(FOC) a 7uH motor under 50A load. est batch materials have arrived but won’t be assembled for about 2 weeks Will continue testing and validation before releasing design files.
- At least 35A continuous and 70A peak with good heat sinking. These are real values. Not marketing numbers
- Up to 12S operating voltage
- FOC or Trapezoidal control
- at least 40kHz switching frequency achievable
- 49mm x 100mm x 14mm without enclosure/heatsink
- Compatible with the VESC Tool for configuration
- Designed in KiCAD. Project files and gerbers will be open-sourced after more testing and validation
- Significantly lower build and BOM cost
- TO-220 FETs allow for big heat sink attachment for better thermal performance
- 2-layer PCB for cheap boards from JLCPCB
- Designed with JLCPCB’s SMT assembly service in mind
- Added optional ON/OFF capability to turn off control circuitry when controller is not in use. A simple mechanical switch will achieve this when connected to the “ON/OFF” 2-pin connector.
- CAN connector changed to 2-pin to avoid improper connections that can cause damage
- Hardware design files open sourced (KiCAD) after validation/testing
- Open source enclosure design to come
- “Living” LCSC BOM to come. BOM document to be continuously updated with compatible and stocked components from LCSC
- VESC 6 based instead of VESC 4.12
- Significantly improved layout to reduce current loops and facilitate low-noise operation of both the power stage and control circuitry
- Lower profile
- Handles lower inductance motors much better
- All components on the top side except MOSFETs
- Addition of JST connectors to replace pin headers for Servo, CAN, COMM, ect.
- Addition of header for unused GPIO pins
- Micro USB
- Larger than original VESC 6. Cheap FOCer 2 is about 49mm x 100mm x 14mm without enclosure/heatsink
- Additional assembly steps to beef up high-current traces. 2 layers of 1oz copper can’t handle the current flowing through during operation. Assembler will have to apply wire/solder wick/bus bar to the exposed Power, Ground, and Phase areas.
- Will need custom firmware that’s not currently supported in the VESC project. Will make firmware available on GitHub until Cheap FOCer 2 is added to and supported by the VESC project.
Funding for essential materials has been achieved but I’m not stopping anyone from helping out. Anything you toss my way helps with unexpected costs and/or helps get this project to completion