The AutoQuad ESC32 –  a yet unseen electronic speed controller

Why the need for specialized ESCs:

Most standard ESCs are not designed for multirotor applications. Most ESCs are build and configured with an airplane application in mind, they are programmed to increase and decrease the throttle command towards the motor in a gentle way for obvious reasons. A motor fast accelerating and decelerating in an airplane or helicopter would either break the gears or put great stress on the prop and airframe.
A multirotor is different. We would rather have a total linear curve and able to change the motor speed, and thus the thrust, as fast as possible to achieve a perfectly stable platform.

While the current ESCs used in most multrotor applications work considerably well, there is a lot of room for improvement. Using the same ESC but loading it with dedicated optimized firmware will increase the handling and stability of your multirotor greatly.
AutoQuad and most other flight controllers will benefit from ESCs that can operate at PWM frequencies of at least 400hz and are stripped from a controlled throttle curve.

Thats where the ESC32 comes in, a superior 32 bits ESC with a lot of interfaces and room for future enhancements.

AutoQuad ESC32 firmware and most of the related software is published under the GNU GPLv3 software license. Please read the license carefully before you apply changes to the code.
More info on the AutoQuad licensing.

Learn more about the ESC32 in our Wiki

Specifications for version 2

– STM32F103 72MHz 32bit ARM
– All N-FET design with gate drivers
– 2S through 5S battery voltage
– Option to power logic side via UART or PWM IN +5v
– CAN transceiver hardware support onboard
– Firmware written completely in C
– Cortex SWD connector pads for real-time debugging
– Communications ports: PWM IN / UART / I2C / CAN Bus
– Communications protocols: PWM IN / CLI / binary / 1-wire / CAN / I2C**
– 4KHz to 64KHz PWM out
– Current sensing / limiting with real shunt resistor
– Virtual current limiter
– Regenerative braking (experimental)
– Closed loop control modes
– Lot of available RAM / FLASH for experimentation and development

** I2C drivers have not yet been written

More info on it’s own Wiki pages.

A note about “ESC32 COMPATIBLE” hardware, offered at various places – made in China

Please read our announcement here

3D animation: use your mouse to turn the board 360deg. left & right