How to calibration fomula of CT for STPM34 ?

[Gz]

Hi All;

I would like to calculate CT. I have formula below.

 I factor = VREF / (AI * CALIB_I * DPOW * KSI * KINT )
 
VREF = 1.18 from datasheet
AI = 16 from datasheet
CALIB_i = 0.875 from datasheet
DPOW = removed
KSI = Rshut = 0.05 ohm when I calcurate from voltage Input vary 0.3V to -0.3V.
I adject 0.3V/5A = 0.06 ohm
KINT = 1 from datasheet
 
my I factor = 1.18 / ( 16 * 0.875 * 0.05 * 1 ) = 1,6857
 
 nvmLeg_t metroDefault = {
 { // config
 0x00000068
 },
 { // data1[19] STPM (Config for CT)
 0x040000a0,
 0x240000a0,
 0x000004e0,
 0x00000000,
 0x003ff800,
 0x003ff800,
 0x003ff800,
 0x003ff800,
 0x00000fff,
 0x00000fff,
 0x00000fff,
 0x00000fff,
 0x03270327,
 0x03270327,
 0x00000000,
 0x00000000,
 0x00000000,
 0x00000000,
 0x00004007,
 },
 { // powerFact[2]
		 30154605,// , // ch 1 112,0028
		 19600493 // ch 2 //(1,18 *1,18 * (1+ (810000/470)) / (2 * 16 * 0.05 * 0,875 * 0,875) = 1960,04937
 },
 { // voltageFact[2]
 116274, // ch 1
 116274 // ch 2
 },
 { // currentFact[2]
 //25934, // ch 1
		 25934,//,
		 16857 // ch 2 //1.18 / (16 * 0,875 * 0.05 * 1) = 1,6857
 }
};

When I use to CT rating 60A/5A. It's available but I use CT rating 100A/5A. I's not available. Who can help me and advice me ?

Thank you.

Best regards.

[Eleon BORLINI]

Hi Panupong, I suggest you to submit your question to this community section: https://community.st.com/s/topic/0TO0X000000BSqZWAW/power-management-and-motor-control

because the product is more related to this family. Regards

[Gz]

Hi eleon.borlini;

I would like to delete this post. Now I post this question in power-management and motor control.

Thank you.

Best regards.