Given a 33 Ω resistor, I need to size the power it can handle. The resistor is in series between a pin where a SPWM voltage is applied and the gate of an IGBT.
In the following photo: blue is the voltage at its ends, red is the SPWM signal input to the gate controller IC IR2110 (before being adjusted to the required electrical amplitudes), green is the current flowing in the resistor
The switching frequency is 10 kHz, while the sinusoidal reference is 50 Hz. I read another answer present here on stackexchange, where a shunt resistor was sized based on the duty cycle of a simple PWM signal, however here the resistor is not current flowing in the dutycycle but only in the rising and falling edge of the LO_1 control signal. I was thinking that perhaps, a good approach might be to size the resistor in the worst case, i.e., at the peak of the sine wave where the SPWM signal is HIGH for almost the entire period. But again, the current and voltage are impulsive, for information, the reason two opposite pulses follow each other is to turn off the igbt, as the absence of voltage is not enough to turn it off.
I don't know if given the implusive nature, the classical model still applies whereby the resistor must be sized with a power of 4W, or in these cases you do it another way.
Below the screen of the design of a half bridge branch of an inverter and the 33 Ω resistor in question.
How can this resistor be sized? What would be the best resistor technology?