Index

About the project

  1. about this documentation in HTML
  2. License

Development tools

  1. Linux
    1. Step-by-step tutorial development tools
      1. Hardware tools to flash and debug the firmware
      2. Tools to build the firmware
        1. stm8-binutils-gdb
      3. Tools to flash the firmware
      4. (optional) Tools do flash and debug the firmware
      5. (optional) Tools to debug using serial port
  2. Windows
  3. C library
  4. Various resources
    1. Printf example

Motor controllers

  1. BMSBattery S series
    1. LCD control panel
      1. LCD protocol
    2. BMSBattery S06S
      1. PWM signals
        1. very low speed - 6 steps
        2. low speed up to max speed - sineware
    3. BMSBattery S06P
      1. various info
        1. 01
        2. 02
    4. BMSBattery S12S
    5. BMSBattery bottle battery controller
  2. Other controllers
    1. Kunteng 18 mosfets motor controller
    2. Lishui motor controllers
      1. LSW-675
        1. Datasheets
        2. PWM signals
    3. JinHui motor controllers
  3. GreenEBikeKit

Motors

  1. BMSBattery Q75
  2. BMSBattery Q85
  3. BMSBattery Q100
  4. BMSBattery Q100C

Datasheets and application notes

  1. STM8S105C6T6
    1. Interrupts

Motor control

  1. Motor control scheme of S06S controller
  2. BLDC 6 steps
  3. PWM schemes
    1. So, Which PWM Technique is Best? (Part 1)
    2. So, Which PWM Technique is Best? (Part 2)
    3. So, Which PWM Technique is Best? (Part 3)
    4. So, Which PWM Technique is Best? (Part 4)
    5. So, Which PWM Technique is Best? (Part 5)
    6. So, Which PWM Technique is Best? (Part 6)
    7. So, Which PWM Technique is Best? (Part 7)
  4. PWM control and Dead Time Insertion
  5. Low inductance motors
  6. Throttle Control Modes
  7. Phase angle FOC
  8. PWM frequency VS motor eRPM
    1. Max motor speed using FOC
    2. Kelly controllers ultra high speed
  9. Sinusoidal Control of BLDCM with Hall Sensors Based
  10. Alternatives

Various

  1. Endless-sphere.com forum messages
    1. 2017.04.25 - Initial forum message
    2. 2017.05.08 - First flash and debug on a dev board
    3. 2017.05.18 - First code flashing and running
    4. 2017.05.20 - more new information
    5. 2017.08.23 - SxxP versus SxxS versus LSW-675
    6. 2017.09.01 - Trying to figure out an algorithm to automatically adjust ui8_position_correction_value
    7. 2017.09.02 - How to do FOC on the BMSBattery S06S/Kunteng STM8 motor controllers
    8. 2017.09.03 - more ideas about zero crossing for FOC
    9. 2017.09.05 - measuring IQ current and manually adjusting position_correction_value
    10. 2017.09.19 - measuring motor current
  2. How to unlock protected read memory
  3. STM8S003 board
  4. LOG
    1. 2017.06.19 - SVM current waveforms

Clipping

  1. 2017.05.22 - Hackaday Links: May 21, 2017

Smart BMS with bluetooth

2017.09.01 - Trying to figure out an algorithm to automatically adjust ui8_position_correction_value

Trying to figure out an algorithm to automatically adjust ui8_position_correction_value



The next oscilloscope screenshots were taken when the motor had a constant PWM duty_cycle value. Blue line represents hall sensors signal (at every 180º and not at 60º). Yellow line is the phase B current signal.
I sent commands by UART, to increase or decrease ui8_position_correction_value and saw the results when this value is above and bellow the correct value.
I repeated this test with other different PWM duty_cycle values/motor speeds and got similar results.

ui8_position_correction_value above value
As we can see, if we look at negative to positive transition of blue line, the current is negative (lower than half of max amplitude). The higher the ui8_position_correction_value, the higher amplitude of the sinewave and also the time difference between the transition of the blue line and zero cross of the yellow line. In this situation, the motor made a lot of vibrations, noise and was using to much current.
images/79-1.png images/79-2.png


ui8_position_correction_value bellow
At the negative to positive transition of blue line, the current is now positive (see that the current sinewave is now inverted!). The lower the ui8_position_correction_value, the higher amplitude of the sinewave and also the time difference between the transition of the blue line and zero cross of the yellow line. In this situation, the motor made a lot of vibrations, noise and was using to much current.
images/79-3.png images/79-4.png


ui8_position_correction_value best value
At the negative to positive transition of blue line, the current is almost zero as also the time difference to the zero cross of the yellow line. In this situation, the motor was quiet, didn't make vibrations and was using very few current.
images/79-5.png images/79-6.png