openinverter forum

kiwifiat wrote: ↑Mon Mar 02, 2020 7:35 am It would be nice to see SH-H support as an option in the firmware.

#define TEMP_MG1 0
#define TEMP_MG2 1
#define TEMP_TRANS 2
#define TEMP_OIL 3

float ntc_temp[8] = {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f}; //temperature output in c
int ntc_raw[8] = {0, 0, 0, 0, 0, 0, 0, 0}; //0 to 1023 input
float ntc_ohms[8] = {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f}; // R1* (1023.0 / (float)ntc_raw - 1.0};
float ntc_bias[8] = {249000, 249000, 18000, 680000, 100000, 10000, 15000, 100000}; //bias resistor in ohms
float log_ntc_ohms[8] = {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f}; //working variable
float ntc_a[8] = {1.484778004e-03, 1.484778004e-03, 1.484778004e-03, 1.484778004e-03, 1.484778004e-03, 1.484778004e-03, 1.484778004e-03, 1.484778004e-03}; //steinhart-hart function
float ntc_b[8] = {2.348962910e-04, 2.348962910e-04, 2.348962910e-04, 2.348962910e-04, 2.348962910e-04, 2.348962910e-04, 2.348962910e-04, 2.348962910e-04}; //steinhart-hart function
float ntc_c[8] = {1.006037158e-07, 1.006037158e-07, 1.006037158e-07, 1.006037158e-07, 1.006037158e-07, 1.006037158e-07, 1.006037158e-07, 1.006037158e-07}; //steinhart-hart function

void process_ntc(byte i)
{
  //at this point, we have already read ntc_raw from the input
  ntc_ohms[i] = ntc_bias[i] * (1023.0 / (float)ntc_raw[i] - 1.0);
  log_ntc_ohms[i] = log(ntc_ohms[i]);
  ntc_temp[i] = (1.0 / (ntc_a[i] + ntc_b[i] * log_ntc_ohms[i] + ntc_c[i] * log_ntc_ohms[i] * log_ntc_ohms[i] * log_ntc_ohms[i]));
  ntc_temp[i] -= 273.15;
}

void run_cooling()
{
  ntc_raw[TEMP_MG1] = analogRead(pin_temp_mg1);
  ntc_raw[TEMP_MG2] = analogRead(pin_temp_mg2);
  ntc_raw[TEMP_TRANS] = analogRead(pin_temp_trans);
  ntc_raw[TEMP_OIL] = analogRead(pin_temp_oil);
  
    for (int i = 0; i > 8; i++)
  {
    if (ntc_raw[i] > 0 && ntc_raw[i] < 1023) process_ntc[i];
    else ntc_temp[i] = 0.0f;
  }
}

Jack Bauer wrote: ↑Mon Mar 02, 2020 1:55 pm 2nd layer is vcc and third is gnd. Is this v2 or v1? I'm going to be testing some 65hvd230 can transcievers soon which they have as a basic part so that would bring things back in line.

xp677 wrote: ↑Mon Mar 02, 2020 8:41 pm

kiwifiat wrote: ↑Mon Mar 02, 2020 7:35 am It would be nice to see SH-H support as an option in the firmware.

I've written it in already in draft, but need the values for it, I've not had a chance to sort this yet.

It's based on the first Google result: https://www.google.com/search?q=arduino ... t+equation

Code: Select all

#define TEMP_MG1 0
#define TEMP_MG2 1
#define TEMP_TRANS 2
#define TEMP_OIL 3

float ntc_temp[8] = {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f}; //temperature output in c
int ntc_raw[8] = {0, 0, 0, 0, 0, 0, 0, 0}; //0 to 1023 input
float ntc_ohms[8] = {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f}; // R1* (1023.0 / (float)ntc_raw - 1.0};
float ntc_bias[8] = {249000, 249000, 18000, 680000, 100000, 10000, 15000, 100000}; //bias resistor in ohms
float log_ntc_ohms[8] = {0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f}; //working variable
float ntc_a[8] = {1.484778004e-03, 1.484778004e-03, 1.484778004e-03, 1.484778004e-03, 1.484778004e-03, 1.484778004e-03, 1.484778004e-03, 1.484778004e-03}; //steinhart-hart function
float ntc_b[8] = {2.348962910e-04, 2.348962910e-04, 2.348962910e-04, 2.348962910e-04, 2.348962910e-04, 2.348962910e-04, 2.348962910e-04, 2.348962910e-04}; //steinhart-hart function
float ntc_c[8] = {1.006037158e-07, 1.006037158e-07, 1.006037158e-07, 1.006037158e-07, 1.006037158e-07, 1.006037158e-07, 1.006037158e-07, 1.006037158e-07}; //steinhart-hart function

void process_ntc(byte i)
{
  //at this point, we have already read ntc_raw from the input
  ntc_ohms[i] = ntc_bias[i] * (1023.0 / (float)ntc_raw[i] - 1.0);
  log_ntc_ohms[i] = log(ntc_ohms[i]);
  ntc_temp[i] = (1.0 / (ntc_a[i] + ntc_b[i] * log_ntc_ohms[i] + ntc_c[i] * log_ntc_ohms[i] * log_ntc_ohms[i] * log_ntc_ohms[i]));
  ntc_temp[i] -= 273.15;
}

void run_cooling()
{
  ntc_raw[TEMP_MG1] = analogRead(pin_temp_mg1);
  ntc_raw[TEMP_MG2] = analogRead(pin_temp_mg2);
  ntc_raw[TEMP_TRANS] = analogRead(pin_temp_trans);
  ntc_raw[TEMP_OIL] = analogRead(pin_temp_oil);
  
    for (int i = 0; i > 8; i++)
  {
    if (ntc_raw[i] > 0 && ntc_raw[i] < 1023) process_ntc[i];
    else ntc_temp[i] = 0.0f;
  }
}

This is for 8 NTC thermistors, adapt to suit for 4 for this VCU, or whatever you want. Untested, does compile.

Jack Bauer wrote: ↑Wed Mar 04, 2020 5:56 pm New batch of V2 controllers has arrived from JLCPCB. This batch have the SAM3 processor fitted:)

mdrobnak wrote: ↑Thu Mar 05, 2020 5:13 pm Hello everyone. This is definitely exciting stuff. I am trying to find part numbers for the inverter that Damien is using.
It looks like it's either G9200-30061 or G9200-30040? Are those both suitable candidates for use with the controller? I just noticed in the picture above is G9200-30030.
It looks like these devices are going for about $750 on Ebay. Anyone have better suggestions than that? I'm actually looking to use this in a hybrid conversion project, but that'll be its own thread when the time comes.

-Matt

mdrobnak wrote: ↑Thu Mar 05, 2020 8:20 pm
Hopefully we have some people doing LHD in this thread that can confirm what works for them. Also I thought the person using the Camry inverter had no reverse? Or was that fixed?

xp677 wrote: ↑Thu Feb 20, 2020 12:50 am It's glued/bonded in - I had to smash mine out. I think I used a screwdriver and then a craft knife to clean up the rest. Be careful not to cut yourself or scratch the aluminium, it's a mating face for my cover!

DC bus cover pictured in my last post is done. I just want to add o-ring grooves around the cable entries, and a million other tiny things that I'll notice.




Now onto the converter input cover!

Dilbert wrote: ↑Thu Mar 12, 2020 2:32 pm Is there an stl file or cad model available for this cover?