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  1. Replies
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    Closed: Re: Does Phase Currents are always RMS

    In the microchip application note AN2520 they have shared the experimental results. If i have to do a similar exercise how do i capture the RMS current? Is it from the oscilloscope?
    155883
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    Closed: Does Phase Currents are always RMS

    When you are driving a PMSM motor or any kind of motor, we always refer to phase currents Ia, Ib, Ic. My question is whether the currents are RMS values? or i need to derive them separately?
  3. Closed: Microchip MCLV-2 Board Clarifications

    I have few clarifications on the MCLV-2 board software and the schematics. I have attached the source code of AN2520 application noted, schematics of the board and AN1292 application note.
    Q1....
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    Closed: Re: AN1292 Application Note Microchip

    Finally i debugged and the data are matching with qAngle and qSin thank you all for the first step. Long way to go before i run the motor and need your support.155804
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    Closed: Re: AN1292 Application Note Microchip

    Sorry for dragging it but i will explain my understanding as per the code which includes the assembler code, hope you will correct it if any mistake.
    As per the code let us say ParkParm.qAngle =...
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    Closed: Re: AN1292 Application Note Microchip

    I do not see +32768. I am doing any mistake? Please correct me.


    SinTable:
    .word 0,1608,3212,4808,6393,7962,9512,11039
    .word 12540,14010,15446,16846,18205,19520,20787,22005
    .word...
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    Closed: Re: AN1292 Application Note Microchip

    I have not understood the concept in the program. I think the program is using a sine look up table size of 128. I am trying in excel file , i am doing in open loop and as of now to understand the...
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    Closed: Re: AN1292 Application Note Microchip

    Thank you very much for the reply. If you can tell me one conversion it will greatly help. First thing i am not very familiar with assembly language.
    As per my calculations


    #define END_SPEED...
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    Closed: AN1292 Application Note Microchip

    I am referring to the AN1292 application note source code. I have few questions in the fuction


    OPENLOOP_RAMPSPEED_INCREASERATE = 10
    void CalculateParkAngle(void)
    {
    else if (Startup_Ramp...
  10. Closed: Re: ADC simultaneous sampling of 4 channels

    One of the reasons is when i am studying about Field Oriented Control in the internet they are suggesting to read the phase currents at the same time else there could be phase difference. So, i am...
  11. Closed: Re: ADC simultaneous sampling of 4 channels

    void PwmInit(void)
    {
    /*Disble the pwm */
    PTCON = 0x0;
    PHASE1 = (FCY/FPWM - 1);
    PHASE2 = (FCY/FPWM - 1);
    PHASE3 = (FCY/FPWM - 1);

    /**/
    IOCON1 = 0xC000;
  12. Closed: Re: ADC simultaneous sampling of 4 channels

    Yes it cannot convert simultaneously but samples all the channels simultaneously.
  13. Closed: ADC simultaneous sampling of 4 channels

    I am referring to the micro dspic33EP256MC506 and the ADC module. There is a configuration for simultaneous sampling of 4 channels that is CH0, CH1, CH2, CH3. Now my confusion is out of these 4...
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    Closed: Re: Is this a good Oscilloscope

    My application is driving the BLDC motor kind of things. I have heard Hantek is other option. Could you please suggest which is better?
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    449

    Closed: Is this a good Oscilloscope

    Can you please provide your comments on the following scope.
  16. Closed: Re: ADC Sampling and Conversion Sequence

    So, my final conclusion is that the holding circuit will keep tracking the input signal and it does not have a condition like minimum ADC conversion clock.
    155204
  17. Closed: Re: ADC Sampling and Conversion Sequence

    Sorry for the delay in the response. Here is the timing diagram i have drawn in excel. I have doubt on the sampling time. Does the sampling time lasts so long? Please advise.
    155203
  18. Closed: ADC Sampling and Conversion Sequence

    I am not understanding the following concept of ADC sampling and conversion using external trigger. The micro i am referring to is dspic33EP256MC506. There is an external conversion trigger section...
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    Closed: Re: Power On Self Test in Automotive

    My other thinking for power on self tests is like if the vehicle is gone for maintenance and if the fault is rectified then he would do a power On off cycle to see if the faults are gone.
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    Closed: Power On Self Test in Automotive

    I have this doubt generally in automotive field there are Power On self tests done like for example Memory test and other critical tests. But my doubt is this tests can fail during run time as well,...
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    Closed: Applications I can work On

    I am working on a kind of self project to driver a motor using the micro chip kit. Now i want to make a kind of complete application solution for commercial purpose. What are the applications i can...
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    Closed: Re: PC based Oscilloscopes

    I am sorry i mean to say i want to see the waveform which may be at 100MHz which is more than the PC based oscilloscope capability. How to overcome this?
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    Closed: PC based Oscilloscopes

    I am about to buy a PC based oscilloscope to save money. I tried nscope but it is not available to buy in Amazon, i am trying Pico 2000 series. But as the frequency increases the cost increases. I am...
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    Closed: Re: Internal Oscillator Sources

    Thank you for the reply. Few more clarifications once the micro starts let us say it has to read Register "R" to decide to select internal or external oscillator. During this time it runs on which...
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    Closed: Internal Oscillator Sources

    I am going through the dsPIC33 family datasheet oscillator section and the first line states
    The dsPIC33/PIC24 family oscillator system includes these characteristics:
    • External and internal...
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