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  1. T

    Motor spinning problem at idle ? cogging, stalls...

    I tried this method but any other wiring combo and the motor refused to spin, so the sensor phase relation must be correct. I hooked my oscilloscope to the Yellow sensor wire and to the Yellow phase wire and this is how it looks like. Sensor wire has a lot of interference and this is because...
  2. T

    Motor spinning problem at idle ? cogging, stalls...

    Can it be, that some controllers and motors have a mismatch? There is no learning mode available for this controller as far as I know of it. These two controllers I have are from the same supplier but with different power ratings. The electronics could be close to similar between the two which...
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    Motor spinning problem at idle ? cogging, stalls...

    After 2 week vacation, I'm on this again. This is what I found: Sensor signals look good, there is 120 degree difference between each sensor phases. Signal shape looks all fine. I tested this by turning the motor by hand and checking all the sensor signals related to each other. Motor starts...
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    12S3P pack cells die for what reason ?

    Hi, Sounds like a normal situation, but I received from my company I worked for a bunch of left over battery packs and I decided to use them to built a 12S pack for a bike. The original packs were German manufactured according to our specs using Panasonic 18650PF cells. Packs were never in...
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    Sine wave controller for hub motor, but the speed.. ?

    Just got the Sine wave controller hooked up to my motor and made my first test runs. It runs but I'm only a bit disappointed to RPM. Since I run on 12S and motor is aswell 48V version, I guess thats it. What can be done? I assume the KV number is the key, so raising the sine wave frequency...
  6. T

    Sine wave controller for hub motor, but the speed.. ?

    Sounds promising, so it's open source project. How do you connect the controller to PC since I dont see any connectors dedicated to that ? Or do I need an LCD module to do the programming ? Many Aliexpress sine wave controllers, are they somehow related to KT since KT is open source ?
  7. T

    Sine wave controller for hub motor, but the speed.. ?

    Hi, I'd like to test my motor with a sine wave controller. In China the selection is huge and price range is attempting, but they all lack of specifications. Mainly I guess they are meant for normal size wheel, say 26" or above, but how about smaller wheel size like 12" wheel?, If there is a...
  8. T

    Anyone experienced with VESC FOC sensorless ?

    Okay thanks for the info. Indeed Pole count didn't do anything. FOC was a big disappointment to not work for the motor in closed loop. Detection was promising though.. Sensors I used for testing and did the detection, it seemed okay, rational values.. I also measured the sensor outputs with...
  9. T

    Anyone experienced with VESC FOC sensorless ?

    I have connected HALL sensor wires and let the VESC tool to find proper settings. Aswell I set the FOC to run in sensored mode. I get 20 pulses / rotation from all sensors (oscillosope checked). Do I need to put them in order or does the VESC make that ? I see the similar effect. Only by adding...
  10. T

    Anyone experienced with VESC FOC sensorless ?

    I have FOC configured to sensorless mode but motor indeed have sensors as well but not intended to use them in thought FOC can be run without.
  11. T

    Anyone experienced with VESC FOC sensorless ?

    Hello, Hope I could find a clue or a hint what to look for to solve the issues I have when I finally got the VESC6 hooked up to my system. System specs are 12s Li-Ion 10Ah bat, 12" wheel with hub motor, FSESC6.6. FOC sensorless. I used a VESC tool Wizard to detect the motor parameters and got...
  12. T

    Automatic anti spark circuit

    36Volt system typically means that there is 10 x Li-Ion cells in series reaching 3.6V x 10 = 36volts. However when cells are fully charged their voltage is 4.2Volts i.e. pack voltage is 42Volts. In this circuit, with the given resistor values, gate voltage in fully charged situation reaches over...
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