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Re: help! IRF3205 burning at only 25 Amper
It is highly recommended that you use RC snubber circuit to limit the dv/dt. You can use schottky diodes for fast turning OFF of mosfets.
All voltage and current sensing should be isolated and also try to cover your microcontroller pcb with a copper sheet, that worked for me in an application.
void SendMsg(void)
{
unsigned char size;
TXPtr=&txdata[0];
size=sizeof(txdata);
while(size)
{
while (U2STAbits.UTXBF);
U2TXREG = *TXPtr++;
size--;
}
}
txdata is the array which is send. This code is for dsPIC30f4011 in microchip C30 compiler, whereas TXPtr is defined as unsigned char...
Yes, at higher duty cycles more gate charge is required from driver than at 50%, and also it increases with the switching frequency. 20khz is good enough, if you want to be at 50khz then improve your driver circuit, as tahmid said, you need to have a larger bootstrap capacitor, kindly share some...
You can simply use full wave precision rectifier circuit and then give it to controller pin through a RC filter circuit. Add a preset and then adjust your ADC as 5v corresponds to max. voltage you want to read. Then calibrate via that preset.
It's very easy, connect any port pin you desire to pin number 1 of 817c through a resistor, and pin number 2 to ground. Limit the current in input LED of optocoupler to 10mA by the resistance and output of it is an npn transistor, connect it as you require.
# define PORTBIT(adr,bit) ((unsigned)(&adr)*8+(bit))
static bit YBzc @ PORTBIT(PORTB, 7); // pin 40 of IC
static bit rs @ PORTBIT(PORTC, 2); // pin 15 of IC
static bit en1 @ PORTBIT(PORTC, 3); // pin 16 of IC
static bit en2 @ PORTBIT(PORTB, 5); //...
Thanks mtwieg for showing your concern, as you are saying that some heavy circuit modification is required, will please tell what modifications are required actually, means some switchgears or some compensator type of thing?? Both the inverters are now working in parallel and as you have said I...
Hi, FvM thanks for your review. I have developed CAN bus communication for my inverter. Now for synchronization i need help for a scheme to synchronize the two inverters, means how to synchronize them so they can also share the currents equally among themselves.
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