Controllers

The generic EUC controller electronic board is mainly composed of:

Microcontroller STM32F103 - is "the brain" of the system
BLDC controller - include 6 power mosfets and all the circuitry to control them; hall sensors circuit; BEMF circuit; current measurement
IMU MPU6050 - the accelerometer and gyroscope
Buzzer
LEDs - for indicating the battery status

Picture of a EUC controller electronic board:

Pictures of electrical signals

Seems there are 2 different ways to control the motor - one for low speed and other for higher speed.

Phase 1 and hall signal at low speed:

Phase 1 and hall signal at high speed:

When the wheel is stopped, the duty-cycle is 50%, the signals are in phase for the 3 phases and the frequency is 15.6khz.

Phase 1 and phase 2 with wheel stopped:

The wheel rotates left if duty-cycle lower than 50% and right if is higher.

Wheel rotating left:

Wheel rotating right:

Please see MicroWorks 18m/h controller board page were we are documenting the technical details.