topic Re: Freescale MKM34Z256VLQ7 Software support SDADC (Application CT ) in Kinetis Microcontrollers

Freescale MKM34Z256VLQ7 Software support SDADC (Application CT )

ravindrabalsara — Fri, 16 Nov 2018 10:42:51 GMT

Hello sir ,

In DRM162 for phase current signal conditioning circuit design for current transformers based application( page no 14 & 15) ,There is no reference design for Shunt type current signal conditioning . So for shunt type design we refer DRM 122 (page no 60).

For software side we are getting SADC count as I share with you on last Mail.But SADC count has not repeating Pattern observer with count.

and I also applied some formula and also try to get the pick value of SADC count but the variation has no effect by such .

In DRM162 given the reference of file mk34z256_3ph.c and metering library, Filter-based metering algorithm library.

We found mk34z256_3ph.c file but that is not compatible with MCUExpresso IDE ( I attach you on last day mail ).

If metering library, Filter-based metering algorithm library as such available it help us for process further .

In DRM 162 filter-based metering algorithm configuration tool is shown (page no 25) ,This tool generate code it self for such calculation .

We use this to generate code but that is not compatible with MCUExpresso IDE.

Please share if there any Procedure to use this configuration tool with MCUEXPRESSO IDE for current signal conditioning.

Please share If there any compatible metering library .

Please share if any further changes in Hardware design or in Software .

We are on the last step of development so we not able to Shift to on other software platform due to time limit .

Re: Freescale MKM34Z256VLQ7 Software support SDADC (Application CT )

Hui_Ma — Thu, 22 Nov 2018 05:45:39 GMT

Hi,

Sorry for the later reply.

There with the Kinetis®-M Three-Phase Power Meter with Shunt Resistors (DRM169), please download design resource from here.

I don't find the DRM162 and DRM169 software code for MCUXpresso IDE, which only based on IAR Embedded Workbench for ARM (version 7.40).

Thank you for the attention.

Have a great day,
Mike

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Re: Freescale MKM34Z256VLQ7 Software support SDADC (Application CT )

ravindrabalsara — Sat, 24 Nov 2018 05:06:19 GMT

Hello sir,

we have tested code for DC voltage and current ,we are getting proper

reading.but while testing of AC voltage and current we are not getting RMS

value.

we are getting continuous different ADC count.please help me sort this

issue.also share if you have any sample code to measure AC voltahe and

current by using shunt resistor for 24 bit Sigma Delta ADC.

Re: Freescale MKM34Z256VLQ7 Software support SDADC (Application CT )

Hui_Ma — Mon, 26 Nov 2018 02:49:53 GMT

Hi,

I checked you submit the same question at another thread.

Please check my reply at that thread. Thanks.

Have a great day,
Mike