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resources:eval:user-guides:ad-fmcmotcon1-ebz:hardware:signal_chain [02 Jul 2015 14:03] – [Ia, Ib Measurement Signal Chain] Mihai Bancisorresources:eval:user-guides:ad-fmcmotcon1-ebz:hardware:signal_chain [10 Feb 2021 04:42] (current) – add retired Robin Getz
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 ====== AD-FMCMOTCON1-EBZ Signal Measurement Chain ====== ====== AD-FMCMOTCON1-EBZ Signal Measurement Chain ======
 +{{page>/wiki/common#retired&nofooter&noheader}}
 The motor control system allows the measurement of the Ia(phase A current), Ib(phase B current) and It(total current) as well as the measurement of Vbus using signal chains which involve components from both the controller and low voltage driver boards. The motor control system allows the measurement of the Ia(phase A current), Ib(phase B current) and It(total current) as well as the measurement of Vbus using signal chains which involve components from both the controller and low voltage driver boards.
  
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   * The formula for calculating Ia or Ib is:    * The formula for calculating Ia or Ib is: 
 <m> I = (counts - 32768)*ADCrange / 2^(ADCbits-1)*RS </m> <m> I = (counts - 32768)*ADCrange / 2^(ADCbits-1)*RS </m>
-where <m> delim{lbrace}{matrix{3}{1}{{counts = ADC value } {ADCrange = 320e-3 } {ADCbits = 16 }}}{ } </m>+where <m> delim{lbrace}{matrix{4}{1}{{counts = ADC value } {RS = 6e-3} {ADCrange = 320e-3 } {ADCbits = 16 }}}{ } </m>
  
 **Case 2: The ADC is not placed in the proximity of the shunt resistor** **Case 2: The ADC is not placed in the proximity of the shunt resistor**
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   * The formula for calculating Ia or Ib is:    * The formula for calculating Ia or Ib is: 
 <m> I = (counts-32768) * ADCrange/2^(ADCbits-1)*CTRLgain / (RS * DRVgain*PGAgain) </m> <m> I = (counts-32768) * ADCrange/2^(ADCbits-1)*CTRLgain / (RS * DRVgain*PGAgain) </m>
-where <m> delim{lbrace}{matrix{6}{1}{{counts = ADC value } {ADCrange = 320e-3} {ADCbits = 16} {CTRLgain = 1/10}{DRVgain = 20}{PGAgain = 1, 2, 4 or 8}}}{ } </m>+where <m> delim{lbrace}{matrix{7}{1}{{counts = ADC value } {RS = 6e-3} {ADCrange = 320e-3} {ADCbits = 16} {CTRLgain = 1/10}{DRVgain = 20}{PGAgain = 1, 2, 4 or 8}}}{ } </m>
  
 {{:resources:eval:user-guides:ad-fmcmotcon1-ebz:hardware:current_chain.png?800|}} {{:resources:eval:user-guides:ad-fmcmotcon1-ebz:hardware:current_chain.png?800|}}
resources/eval/user-guides/ad-fmcmotcon1-ebz/hardware/signal_chain.txt · Last modified: 10 Feb 2021 04:42 by Robin Getz

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