Custom opensource BLDC ESC for featherweights

[cavecrusher]

Due to my interest in all things electric I found this opensource brushless controller for featherweight size robots.

bldcesc.jpg

http://vedder.se/2014/01/a-custom-bl...ller/#more-529

In short the specs are:

-5V 1A BEC output
-Input voltage: 8V – 60V.
-Output current: Up to 240A for a couple of seconds or about 50A continuous depending on the cooling.

-PCB size: slightly less than 40mm x 60mm.

-Current and voltage measurement on all phases.
-Regenerative braking.
-Sensored or sensorless commutation.
-Adaptive PWM frequency to get as good ADC measurements as possible.
-RPM-based phase advance.
-Good start-up torque in the sensorless mode (and obviously in the sensored mode as well).
-Duty-cycle control, speed control or current control.
-Interface to control the motor: servo signal, analog, UART, I2C, USB or CAN (with a transceiver).
-Adjustable protection against;
Low input voltage
High input voltage
High motor current
High input current
High regenerative braking current (separate limits for the motor and the input)
Rapid duty cycle changes (ramping)
High RPM (separate limits for each direction).

I'm trying to get a batch of about 25 pieces built together with Jeroen (KOS). If you would be interested in a couple, please contact me.