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  1. S

    KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)

    I have also noticed small resistance when free wheling with controller on on DD motor. When i switch off the controller then it dissapear. I think you can try to enable "pwm off @ idle" however from what i read somewhere in the thread you need to precisely measure the inductunce of the motor...
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    THE DM01 MOTOR: ENGINEERING EXCELLENCE FOR E-BIKES

    Ad. 1. thanks, that is promising Ad. 2. sorry i was not precise: what weight can be read when put on the pedal? like 40kg, 60kg ? or can you provide torque reading?
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    Rear all axle v3 with torque sensor

    So what you say it should be 9pin cable, but this one is 10pin :unsure: . The thermistor is on separate wire to the possible torque signal. Or it should be torque and PAS combined? any simplest way to check the signal - oscilloscope? Or kind of UART decode circuit? Can you recomend something?
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    Rear all axle v3 with torque sensor

    i do have TDCM HCA5-F motor, apart from phase wires it does have 7 wires coming out of the cable. I suspect it has the torque sensor in the cassete. what should be the power line voltage 5V or 12V? From the grintech website the A5 motor has the 12V supply to power halls and torque sensor. Is...
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    Lishui "Open Source Firmware" project / KingMeter 5S

    the OSF version uses Torque and cadence to calculate the human power (plus sometimes torque override) but i am very curious what the principle in those original controllers we can get from Phoebe Liu ?
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    THE DM01 MOTOR: ENGINEERING EXCELLENCE FOR E-BIKES

    Perhaps you can also answer some more details about the torque sensor itself: 1. is torque reading linear? 2. what is the maximum torque reading range?
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    Anyone know about/tried TOSEVEN Mid Drive?

    Q factorThis is a bit more as Q-factor is measured on external side od cranks
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    Anyone know about/tried TOSEVEN Mid Drive?

    you can also use oval chainrings as well that are not possible on mid-drives BTW ;)
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    Anyone know about/tried TOSEVEN Mid Drive?

    Then it would give very wide Q factor that is BTW the issue of CYC motors, measuring around 190mm. As far as i remember Yamaha motors do have it around 170mm making more side clearance and more convinient biomechanical force transfer to the pedal.
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    Anyone know about/tried TOSEVEN Mid Drive?

    This is actually true, but not very different to all other motors like BBS01/2 or TSDZ2/8, the reason is the offset needed to accomodate the big gear under the chainring. You can make it even by assimetric crank set
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    KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)

    The bluetooth app has not been developed for quite long time. People reported it crashing at certain circumstances. Personally i am using it only for calibration and testing procedures.
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    Anyone know about/tried TOSEVEN Mid Drive?

    TSDZ torques sensor is in fact not linear. It does react to like 25-35kg on pedal but beyond that does show little reaction. So the question is if Toseven or CYC have linear sensor reading and what is their saturation point (max load on pedal that can be read?)
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    KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)

    Personally i have not experienced. Van you post some pictures. Does it happen along with something not working properly?
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    KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)

    Do we have somewhere in the code a protection from the motor stall/ blocked? like if the motor is blocked for >1sec it will set the current to zero?
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    new tsdz8 pswpower

    Looking forward for some more info after couple of more rides. Like power delivery smoothness, overheating, bearing quality etc. - just to compare with smaller but older brother TSDZ2 :unsure:
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    KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)

    need to replace failed FETs on 12FET Kunteng: the original one is STP110N7F6: STMicroelectronics STP110N7F6 Which of the perimeters should be identical for proper operation under OSF?:rolleyes:
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    KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)

    So the test were succesfull. I have fine tuned my invention wich is effort mode that actually is evolution of torque override/hibryd mode but about that some other day later .. :) (need graphs etc.) . The front wheel can experience some skid but it is very short and easy to control. Actually...
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    KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)

    So i have increased phase current to the target values (2,5 x battery current), i have also changed SDCC from 4.0 to 4.1 version. Now it works on the stand. Today road test..
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    KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)

    I am working on new conversion. The brake activation does not help or help on random basis. I have changed displayed perimeters to see the statuses and it shows 140 that is phase current limiting - 128 + 8 + 4. After weekend i will flash higher values and report if it helps.
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    TSDZ2 OSF for all displays, VLCD5-VLCD6-XH18, LCD3, 860C-850C-SW102.

    Ok, thanks for confirming my understanding, can we say that eMTB mode somehow compensate that characteristics, ..i guess? :unsure:
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    TSDZ2 OSF for all displays, VLCD5-VLCD6-XH18, LCD3, 860C-850C-SW102.

    There was a procedure to get fully linear torques sensor response: How to calibrate the torque sensor however with the current firmware it does not seem to be supported any more as after calculations the characteristics is still non-linear: is this the correct statement?
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    KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)

    So what you mean is that it is safe to flash this replacement MCU version?
  23. S

    KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)

    The situation is that torque signal is trying to pull it to 1,5V idle but its cannot overcome existing on this pin power supply. You actually need to desolder the pull-up resistor that is connecting X4 to 5V supply. So X4 when disconnected from torque signal should show Perfect 0V. Hope you...
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    KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)

    Found the same MCU on KT36/48SVPRM-EP01X1 , in addition the white motor wire (speed / temperature sensor) is connected to X5 pin instead of X4. I will try to find proper controller with original STI MCU. Otherwise could it be the end of KT OSF flashing - hope not. Hovewer Lishui controllers...
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