Little FOCer Rev4 ESC Electric Speed Controller - BYOH (bring your own heat sink version)
Save on import fees as we are the only Canadian dealer of the Little FOCer. But yes, we see you America, and we can ship to you too!
The latest version of the ultimate DIY open source controller for all things PEV. Works with the VESC™️ firmware and is the best way to get the full potential out of your PEV, and your DIY wheel in particular 😉. Needless to say, you should have a strong grasp on the mechanics and electronics of DIY PEV mods before attempting installation. But you already do cuz you're here right!? 😛
You can check out the PEV.DEV mod knowledge database here.
For all installation and compatibility enquiries please reach out to Makers PEV directly at contact@makerspev.com.
- The Little FOCer without a heat sink
- Uses VESC™️ based firmware
- DC input 12 gauge wire to XT60 Male
- Phase output 12 gauge wire to 4mm female bullet connectors
- On board IMU for balance applications
- Integrated Bluetooth ESP32
- DRV-less design
- Sophisticated fault detection for over-current, over-voltage, gate drive errors, and more
- Easy On/Off capability with latching or momentary switch of choice
- ESD Protected IO
- 72mm x 84mm PCB footprint
- ADC1 and ADC2 internally equipped with 10k Ohm pulldown resistors.
- Support for phase filters
- ASS support (Advanced Sensorless Startup)
New features in Rev4:
- Smart LED control
- 5V 2A accessory power supply
- 30% cooler operation vs the v3.x
- Off=400µA
- Momentary Pushbutton Support with Auto-shutdown
- Safety-limited 5V supplies at the On/Off and hall connectors. Shorting these supplies will not cause brownout of the entire controller.
*Note that the UART and ADC connections are now different than the typical VESC™️ "COMM" connector.
| Specification | Value |
| Nominal Input Voltage | 28V to 72V (8s to 20s Lithium Ion) |
| Recommended Lower voltage limit | 24V |
| Absolute Maximum Operating Voltage | 84V |
| Battery Current Consumption |
Off=400µA Idle< 0.8W Max (ext.) = 100A |
| Peek Phase Current | 250A |
| Peak Efficiency | 95% or greater |
| PET PWM switching frequency range | 10kHz to 60kHz (Center Aligned PWM) |
| Minimum recommended motor phase to phase inductance | 10µH |
| Supported Motor Types | BLDC and DC motors |
| Input Capacitance | 602µF |
| Operating Ambient Temperature Range | -20C to 50C |
| Storage Temperature Range | -35C to 85C |
| Thermal Cutback | The controller linearly reduces maximum output current when the internal controller temperature is above 80C. Complete cutoff at 100C, the control board over-temperature threshold. |
| Communication Protocols |
1x CAN 1x UART 1x Bluetooth Low Energy |
| Gyroscope |
On board IMU |
| Management Interfaces |
USB Type-C Bluetooth |
| Management Software |
VESC™️ 6 open source project compatible |
The Little FOCer V4 is based upon the VESC®-Project. VESC is a registered TM, owned by Benjamin Vedder.