Power Forum Discussions

Hello all,

I have used the spice model of Infineon IGBT in the MATLAB-Simulink through subcircuit to ssc function.

NOw that gives an error, because of some issues. I have tried to convert the spice model MATLAB-Simulink through subcircuit to ssc function. and it is also having errors. This might be due to the completely changed parameter notation in IGBT spice files.

Looking forward to the suggestions or different spice files.  I tried to use the TO-247 4pin IGBT spice files.

For information error message is:

Error using spiceNetlist2String
Unable to access IGBT_1200_HS3_L.lib.

Error in subcircuit2ssc

Error in subcircuit2ssc (line 31)
subcircuit2ssc(netlist,target);

Error in igbt_1200 (line 1)
subcircuit2ssc('IGBT_1200_HS3_L.lib','+IGBT_HS_ckt' );

i have designed and developed a 24V 3A CV power supply board on ICL8810.

The design requirements are

1) input 100-300V AC

2) output 24V 3A

3) PF > 0.95

4) THD less than 10%

5) Efficiency  > 90%

6) Load and line regulation < 3%

I am sharing the schematic.

On turn ON, the voltmeter reads 24.045V - 230V input - no load

on setting load to 100mA the output is 23.96V

on 200mA its 22.93V and then right upto 1.2A its 22.9V

above 1.2A the output stops dropping.

at 1.7A its 18V

at 2.0A its 9V

I have checked everything but am not able to find the reason.

The transformer is as below

PQ2620 Ae 118

pin 3-1 primary 40T 0.35 x 2

pin 12-7 secondary 8T 0.35x4

pin 6-4 aux 5T  0.3x1

I have used the secondary output to TL431 directly, rest everything is used as per the ICL8810 Eval board guidelines.

would seek help to understand the load regulation issues and methods to diagnose and correct.

schematic is attached.

Thanks

Hi

I used Imotion IMC100 series and I plan to put a software lock on it. Is it possible to create a software lock on IMC100 series so that other people cannot program it or access its information? How should I do this? please guide me.

Hi,

I am currently working on PLECS Simulink platform about an inverter model using your SiC  IGBT with parallel diode PLECS model (IKZA75N120CH7), I am confused about the thermal chain setting in the thermal model. 

When I simulink my PLECS model, it is weird that  the circuit seems to need infinite time  until it can reach the stable state, I searched a lot and found out the problem is due to too high thermal capacity (C) in your thermal model. As you can see from following pictures, the original thermal chain is Foster type, I changed it into Cauer type according to the advice from  PLECS Userform, it can't influence the results of simulation. However from that Cauer type we can clearly see that the last 2 thermal capacity (C) is too high to cause thermal time constant of circuit too long though the thermal resistance is relatively low.

So I would like to ask, is there any reason behind setting the thermal capacity so low? Since so low thermal capacity means too high a thermal time constant, the circuit actually can't reach a stable state, so the simulation results are also not so accurate, right? Because of corresponding thermal resistance of last 2 columns is very small, so I guess it won't influence the finally junction temperature a lot. Can I just delete the too high thermal capacity columns , then the thermal time constant is suitable and the circuit can reach a stable state easily.

Thanks a lot for your answer and help.

Best regards,

Joy

Is the IRLML2803 OK to use with a 3.3V logic gate to source drive signal?

It is specified for 4.5V VGS.

Thee gate charge curve would seem to show that a 3.3V VGS signal would be iffy but the ID vs VGS curve shows low current operation at VGS = 3V.

I there a RDS(on) vs VGS curve for the IRLML2803?

请问我写的flash读取程序是否正确。程序如下：

#define FLASH_ADDRESS (0x10020000U)

void ReadPara (void) //从FLASH_ADDRESS读出数据
{
    unsigned char i;
    unsigned long* addr = (unsigned long *)FLASH_ADDRESS;
    for(i=0;i<5;i++)
    {
        savedata[i]=*addr;
    }

}

OpenPower, i am unable to flash XDPE132G5D
Both dongle and chip were purchased form mouser.
I am able to flash IR35217 using same dongle with PowerCenenter so dongle is working.

Any attempt to flash the chip ends in error.
I am loosing flashing attempts.

Any help ?

Hello,

I am using the REFWLCTX15WC1 reference design with the source code given from Modus Toolbox and I am trying to limit my output transmitter power to less than 6W. I have a power receiver that requests for 10W in BPP mode, so the power transmitter is outputting 8W in BPP mode which is causing an OTP event. I know where to limit the voltage on the Vbridge in the config.xml file in the source code. But when I limit the voltage to 5.5V, the current increases to 1.5A to produce that 8W output again. Unfortunately, I don't have control of what the power receiver is requesting. So, I am attempting to limit the power transfer on the transmitter side. Any help or suggestions will be greatly appreciated. Thanks!