Questions tagged [losses]
8 questions
2
votes
0 answers
MOSFET body diode current rating vs Schottky diode
How is it possible that a MOSFET's body diode in a TO-220 package, such as the N-channel IRL3803 or P-channel IRF4905, has a much higher average/continuous current rating than a high-current Schottky diode in a larger TO-247 package, such as the…
GLK
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2
votes
1 answer
Integral form of Joule losses
We all know that for Joule losses \$P_j = V(t)I(t)\$, and the integral form is \$P_j=\iint \rho j^2 \, dV \$.
When trying to do some integrals, I found this expression in a document:
$$P_i = \frac{1}{2 \sigma} \iint_S \pmb{J}_i \cdot \pmb{J}_i^* \,…
Wallflower
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1
vote
1 answer
Help with intuitive understanding of these transformer iron/copper loss equations
I have been going through the Handbook of Electricity Metering (11th edition) for my new job. They give the following equation for transformer watt loss due to core/line losses. I am not an EE so this is all new to me. I am trying to understand…
compto2017
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0
votes
1 answer
What is wrong with my double pulse test setup in LTspice?
I am trying to make double pulse test measurements in LTspice using the spice model of a MOSFET and gate driver we are using in our actual design. My setup seems to be not working as nothing is appearing on the gate of the low side MOSFET which is…
Alison
- 295
- 5
0
votes
1 answer
Conduction losses calculation of a SiC MOSFET
I have a question regarding conduction losses calculation of a SiC MOSFET. What I found in different research papers and in application notes is that you calculate the power dissipated during forward conduction, reverse conduction, and body diode…
Alison
- 295
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0
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0 answers
IGBT and SiC MOSFET conduction losses
What is the actual reason behind IGBTs having lesser conduction losses than SiC MOSFETs? For the same application, I can see that an IGBT having the same power rating exhibits 10 times more switching losses but 3 times lesser conduction losses then…
Alison
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- 5
0
votes
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Reverse Conduction/Third Quadrant operation of SiC MOSFET
Good Day,
I have to calculate the Conduction losses of SiC MOSFET and how I am calculating total losses is by segregating the losses into three categoriesincludes, Forward Conduction loss of MOSFET, Reverse Conduction Loss of MOSFET and Body Diode…
Alison
- 295
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-3
votes
2 answers
How do we maximize core and winding losses in an electromagnet (and calculate them) for variable DC input?
Bigger Picture:
Imagine a magnet approaching the solenoid with some initial constant velocity on \$v_0\$ on x axis. The approaching magnet will induce an EMF and induced current in solenoid. We want to maximize the power loss so that the solenoid…
student0
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