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current measurement in the FMCMOTCON2 reference design

Question asked by qxj on Jan 13, 2016
Latest reply on Jan 14, 2016 by qxj

Hi guys,

 

I'm using the AD-FMCMOTCON2-EBZ reference design to build my motor control algorithm. Now I want to get the actual values of the phase currents Ia and Ib.

 

In the AD-FMCMOTCON2-EBZ kit the phase current is senced by a sigma-delta-modulator AD7403, which exports a single-bit data stream to a SINC3 filter. This filter will reconstruct the actual current measurement.

 

Could anybody tell me whether the signals of these two output ports "ia_o" and "ib_o" in the reference design are the actual current measurement values, i.e. the output signals of SINC3 filter?


The design block is shown as follow:

mc_current_monitor.PNG


Thanks,

qxj

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