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  1. V

    What is Startup Torque

    What is starup torque? I have used the STM32 FOC algorithm using digital hall sensors and the 3 phase current sensing. When ever the 2 wheeler vehicle starts the expectation is it shall accelerate very fast. My clarification is do i need to write a separate algorithm for very high starting...
  2. V

    Difference between PWM OFF and Iq=0

    I am implementing the code for throttle in Torque control mode with varying Iq. My clarification is in case of throttle equal to 0%, should i implement the PWM off function or just make Iq=0. I tried both options when i make PWM off or StopMotor function and when throttle is 0% it is switching...
  3. V

    Start up issue in the vehicle FOC + BLDC motor + Digital Hall sensor

    I am using the STM32 source code and FOC, i am facing the issue of start up where the vehicle goes in steps and jerks and does not start smoothly when throttle applied. The position sensor is digital hall sensor. I plotted the hall angle and the Iq variable As you can see initially FOC is...
  4. V

    Hall Electrical Phase Shift

    I am referring to the ST document about motor control, it is too complicated a subject to understand and remember. I am trying to understand the hall electrical phase shift as shown below My understanding of the importance of the phase shift parameter is below, please correct me if i am wrong...
  5. V

    Space Vector PWM

    I had this doubt for very long time. I am referring to the NXP user guide and regarding the space vector modulation. and when it is plotted For 1,0,0 it is 2UDCBus/3 but in the space vector diagram it is 2/sqrt(3) UDCBus, there is factor sqrt(3). How is this additional factor derived?
  6. V

    Clarification on Id, Vd FOC

    The question is on FOC, when we are running the FOC without flux weakening then Iq = Torque component and Id = flux component, we have to keep Id=0 to produce maximum torque, does it also mean that Vd is also zero?
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