# \#conduction-losses **URL:** https://forum.plexim.com/tag/conduction-losses/367.md [Latest](https://forum.plexim.com/latest.md) · [Categories](https://forum.plexim.com/categories.md) · [Tags](https://forum.plexim.com/tags.md) --- ## [Loss Discrepancy Between PLECS Thermal Model and Fuji Electric Online Simulator (7MBR50VD120-50)](https://forum.plexim.com/t/loss-discrepancy-between-plecs-thermal-model-and-fuji-electric-online-simulator-7mbr50vd120-50/2830)
**Author:** [@yashaswini](https://forum.plexim.com/u/yashaswini)\ **Replies:** 5\ **Last updated:** [February 5, 2026, 9:44am UTC](https://forum.plexim.com/t/loss-discrepancy-between-plecs-thermal-model-and-fuji-electric-online-simulator-7mbr50vd120-50/2830 "2026-02-05T09:44:12Z")
Hi Plecs team, I am fairly new to plecs and I have developed a three-phase, two-level inverter in PLECS using sinusoidal PWM. For the loss and thermal analysis, I am using the Fuji Electric IGBT module 7MBR50VD120-50, w… --- ## [How are switching and conduction losses calculated by the model if the waveforms are ideal?](https://forum.plexim.com/t/how-are-switching-and-conduction-losses-calculated-by-the-model-if-the-waveforms-are-ideal/868)
**Author:** [@skadoosh237](https://forum.plexim.com/u/skadoosh237)\ **Replies:** 15\ **Last updated:** [July 23, 2025, 8:48pm UTC](https://forum.plexim.com/t/how-are-switching-and-conduction-losses-calculated-by-the-model-if-the-waveforms-are-ideal/868 "2025-07-23T20:48:10Z")
Hello everyone, How does PLECS thermal look-up models calculate losses? As the MOSFETs/IGBTs are switched with ideal waveforms, the effect of the output capacitance on the switching is not seen. Also the current wavefor… --- ## [Effect of electrical parameters on conduction/switching losses calculated from thermal model](https://forum.plexim.com/t/effect-of-electrical-parameters-on-conduction-switching-losses-calculated-from-thermal-model/1390)
**Author:** [@SVerma](https://forum.plexim.com/u/SVerma)\ **Replies:** 3\ **Last updated:** [September 10, 2024, 11:13am UTC](https://forum.plexim.com/t/effect-of-electrical-parameters-on-conduction-switching-losses-calculated-from-thermal-model/1390 "2024-09-10T11:13:58Z")
I was calculating losses for a certain resonant converter converging to a nominal value of switching frequency of operation. I used thermal models available from the manufacturers (Wolfspeed, Dynex) and filled all the th… --- ## [Inconsistent Efficiency Results Using Switch Loss Calculator in SiC MOSFET AC/DC Converter](https://forum.plexim.com/t/inconsistent-efficiency-results-using-switch-loss-calculator-in-sic-mosfet-ac-dc-converter/1388)
**Author:** [@Muhammad\_Awais](https://forum.plexim.com/u/Muhammad_Awais)\ **Replies:** 5\ **Last updated:** [August 22, 2024, 1:24pm UTC](https://forum.plexim.com/t/inconsistent-efficiency-results-using-switch-loss-calculator-in-sic-mosfet-ac-dc-converter/1388 "2024-08-22T13:24:09Z")
Hello everyone, I am relatively new to PLECS and have been working on designing an AC/DC converter using SiC MOSFETs. To estimate the switching and conduction losses, I am utilizing the Switch Loss Calculator tool. How… --- ## [Same voltage and current but different conduction losses?](https://forum.plexim.com/t/same-voltage-and-current-but-different-conduction-losses/1303)
**Author:** [@OptimisticPoplar](https://forum.plexim.com/u/OptimisticPoplar)\ **Replies:** 1\ **Last updated:** [January 2, 2024, 11:19am UTC](https://forum.plexim.com/t/same-voltage-and-current-but-different-conduction-losses/1303 "2024-01-02T11:19:59Z")
Hi, I’m calculating the conduction loss of diode and there are two kind of diode model. As you can see, the voltage and current waveforms are same but their conduction lossed are differernt. Can you help me to figure it… --- ## [Equation based reverse conduction and switching losses in synchronous buck converter](https://forum.plexim.com/t/equation-based-reverse-conduction-and-switching-losses-in-synchronous-buck-converter/1300)
**Author:** [@nagellam](https://forum.plexim.com/u/nagellam)\ **Replies:** 2\ **Last updated:** [December 21, 2023, 2:34am UTC](https://forum.plexim.com/t/equation-based-reverse-conduction-and-switching-losses-in-synchronous-buck-converter/1300 "2023-12-21T02:34:07Z")
Hello, I am new to plecs and I trying to estimate losses of synchronous buck converter using the a mosfet with body diode. The mosfet I have chosen is STL210N4F7AG. The questions I have are as follows: I am using for… --- ## [Interpretation of conduction losses](https://forum.plexim.com/t/interpretation-of-conduction-losses/1243)
**Author:** [@BH\_85](https://forum.plexim.com/u/BH_85)\ **Replies:** 4\ **Last updated:** [June 15, 2023, 3:58am UTC](https://forum.plexim.com/t/interpretation-of-conduction-losses/1243 "2023-06-15T03:58:15Z")
Hi there, I’m pretty new with PLECS and wanna try to understand how conduction losses are calculated in a MOSFET. I’ve checked that it’s calculated as (in watts) as Vth \* Ids, where Vth is the MOSFET voltage drop and I… --- ## [Doubts about MOSFET modelisation, body diode and Wolfspeed's thermal descriptions](https://forum.plexim.com/t/doubts-about-mosfet-modelisation-body-diode-and-wolfspeeds-thermal-descriptions/1045)
**Author:** [@nikilito](https://forum.plexim.com/u/nikilito)\ **Replies:** 2\ **Last updated:** [August 3, 2021, 4:59am UTC](https://forum.plexim.com/t/doubts-about-mosfet-modelisation-body-diode-and-wolfspeeds-thermal-descriptions/1045 "2021-08-03T04:59:26Z")
Hi everyone. I have three separate questions but linked each other. 1 - A Mosfet is a bidirectional device and from what I know, this happens because of the presence of an intrinsic diode (body diode) that exists due t… --- ## [Estimating MOSFET + diode conduction loss with separate thermal description for each device](https://forum.plexim.com/t/estimating-mosfet-diode-conduction-loss-with-separate-thermal-description-for-each-device/955)
**Author:** [@pchannegowda](https://forum.plexim.com/u/pchannegowda)\ **Replies:** 3\ **Last updated:** [February 19, 2021, 1:05pm UTC](https://forum.plexim.com/t/estimating-mosfet-diode-conduction-loss-with-separate-thermal-description-for-each-device/955 "2021-02-19T13:05:39Z")
Hello, I am trying to estimate conduction loss and switching loss of a MOSFET. MOSFET and the antiparallel Bodydiode both have separate thermal description files. Plecs currently has a bug where it ignores MOSFET gate c… --- ## [Calculating Switching and Conduction Losses of a Resonant Converter](https://forum.plexim.com/t/calculating-switching-and-conduction-losses-of-a-resonant-converter/903)
**Author:** [@Tharuka](https://forum.plexim.com/u/Tharuka)\ **Replies:** 2\ **Last updated:** [November 20, 2020, 6:10pm UTC](https://forum.plexim.com/t/calculating-switching-and-conduction-losses-of-a-resonant-converter/903 "2020-11-20T18:10:42Z")
I’m using Probe along with periodic average block to calculate conductions losses & Probe with Periodic Impulse Average block to calculate switching losses of a CLLC Resonant converter in Plecs. For both the averaging bl… --- ## [Switching and coduction losses of a three phase converter](https://forum.plexim.com/t/switching-and-coduction-losses-of-a-three-phase-converter/891)
**Author:** [@LukasHunziker](https://forum.plexim.com/u/LukasHunziker)\ **Replies:** 1\ **Last updated:** [November 4, 2020, 4:06pm UTC](https://forum.plexim.com/t/switching-and-coduction-losses-of-a-three-phase-converter/891 "2020-11-04T16:06:47Z")
The goal of the simulation is to simulate the switching and conduction losses of a 3-phase converter. The converter should be operated without load. The following aspect is not clear to me: Why are the switching losses … --- ## [Incoherence in loss calculation](https://forum.plexim.com/t/incoherence-in-loss-calculation/856)
**Author:** [@tanguy](https://forum.plexim.com/u/tanguy)\ **Replies:** 9\ **Last updated:** [October 30, 2020, 12:29pm UTC](https://forum.plexim.com/t/incoherence-in-loss-calculation/856 "2020-10-30T12:29:01Z")
Even with a simple model of inverter, the results proposed are not coherent in comparison with the theory… I don’t understand what happen because I took the Buck model in the Demo and I adapt to my inverter. Could you he… --- ## [How to get Energy loss from datasheet?](https://forum.plexim.com/t/how-to-get-energy-loss-from-datasheet/855)
**Author:** [@Jack](https://forum.plexim.com/u/Jack)\ **Replies:** 3\ **Last updated:** [September 8, 2020, 2:46pm UTC](https://forum.plexim.com/t/how-to-get-energy-loss-from-datasheet/855 "2020-09-08T14:46:49Z")
How to I model the Turn- On loss, Turn-Off loss and conduction loss from the datasheet? Is there a tutorial online? I trying with a datasheet, but it does not provide energy loss. May I know how to go about it? --- ## [Problem in conduction loss measurement in inverter](https://forum.plexim.com/t/problem-in-conduction-loss-measurement-in-inverter/841)
**Author:** [@tanguy](https://forum.plexim.com/u/tanguy)\ **Replies:** 1\ **Last updated:** [August 28, 2020, 1:24pm UTC](https://forum.plexim.com/t/problem-in-conduction-loss-measurement-in-inverter/841 "2020-08-28T13:24:14Z")
Hi, I don’t understand, I’m trying to determine conduction and switching losses in a 10kHz inverter made of OGBT and diode devices. The respective conduction and switching losses are so huge, even filtered on 0.0001s, t… --- ## [Divergence on efficiency calcul for 3-phase inverter](https://forum.plexim.com/t/divergence-on-efficiency-calcul-for-3-phase-inverter/839)
**Author:** [@tanguy](https://forum.plexim.com/u/tanguy)\ **Replies:** 0\ **Last updated:** [August 25, 2020, 12:33pm UTC](https://forum.plexim.com/t/divergence-on-efficiency-calcul-for-3-phase-inverter/839 "2020-08-25T12:33:53Z")
please, my efficiency calculation diverges and I don’t understand why. Could you help me? onduleur\_IGBT.plecs (170 KB) --- ## [Different conduction losse of mosfet in one line period of 3 phase inverter simulation](https://forum.plexim.com/t/different-conduction-losse-of-mosfet-in-one-line-period-of-3-phase-inverter-simulation/812)
**Author:** [@k10](https://forum.plexim.com/u/k10)\ **Replies:** 1\ **Last updated:** [July 23, 2020, 12:31pm UTC](https://forum.plexim.com/t/different-conduction-losse-of-mosfet-in-one-line-period-of-3-phase-inverter-simulation/812 "2020-07-23T12:31:04Z")
Hello all, In my 3 phase simulation(screen shot attached) I can see different values of conduction loss in mosfet for positive and negative cycle(in one line cycle). I have used Gansystems model for mosfets and used pr… --- ## [Loss calculation for 3-phase inverter](https://forum.plexim.com/t/loss-calculation-for-3-phase-inverter/724)
**Author:** [@Mohsen](https://forum.plexim.com/u/Mohsen)\ **Replies:** 1\ **Last updated:** [December 12, 2019, 4:03am UTC](https://forum.plexim.com/t/loss-calculation-for-3-phase-inverter/724 "2019-12-12T04:03:04Z")
Hi everyone, Does anybody have a simulation file of 3-phase inverter where switching and conduction losses of switches are estimated? Best regards, Mohsen --- ## [Negative switching or conduction losses are cropped](https://forum.plexim.com/t/negative-switching-or-conduction-losses-are-cropped/694)
**Author:** [@rubzi](https://forum.plexim.com/u/rubzi)\ **Replies:** 4\ **Last updated:** [September 17, 2019, 4:55am UTC](https://forum.plexim.com/t/negative-switching-or-conduction-losses-are-cropped/694 "2019-09-17T04:55:41Z")
Hi, I have problems simulating thermal performance for two SiC-MosFETS from WOLFSPEED C2M0080170P and c3m0065090d. I have defined the performance for positive and negative currents, voltages and temperatures. Still this… --- ## [MOSFET with diode. conduction loss overestimated when current is negative and MOSFET turned ON](https://forum.plexim.com/t/mosfet-with-diode-conduction-loss-overestimated-when-current-is-negative-and-mosfet-turned-on/675)
**Author:** [@pchannegowda](https://forum.plexim.com/u/pchannegowda)\ **Replies:** 5\ **Last updated:** [July 22, 2019, 6:26pm UTC](https://forum.plexim.com/t/mosfet-with-diode-conduction-loss-overestimated-when-current-is-negative-and-mosfet-turned-on/675 "2019-07-22T18:26:03Z")
Hello, I have defined a thermal model for the MOSFET with integrated antiparallel Diode. The conduction loss profile looks similar to the second curve in page 138 of the Plecs manual with Von(t) defined for when ion(t) … --- ## [Calculating Losses in MMC](https://forum.plexim.com/t/calculating-losses-in-mmc/641)
**Author:** [@Marzio96](https://forum.plexim.com/u/Marzio96)\ **Replies:** 7\ **Last updated:** [April 12, 2019, 1:45pm UTC](https://forum.plexim.com/t/calculating-losses-in-mmc/641 "2019-04-12T13:45:36Z")
Hello to everyone, I’m working on my masters’thesis and the main topic is about the losses on a MMC converter. I have seen the DEMO model on HVDC Transmission system with MMCs. Do you know how to calculate the switching… --- ## [IGBT with Diode switching times influence on conduction losses](https://forum.plexim.com/t/igbt-with-diode-switching-times-influence-on-conduction-losses/609)
**Author:** [@Bartlomiej\_Syslo](https://forum.plexim.com/u/Bartlomiej_Syslo)\ **Replies:** 1\ **Last updated:** [March 1, 2019, 4:24am UTC](https://forum.plexim.com/t/igbt-with-diode-switching-times-influence-on-conduction-losses/609 "2019-03-01T04:24:58Z")
I am simulating a specific topology of Voltage Source Inverter with the use of IGBT transistors. Conduction losses and switching losses are being calculated as in PLECS examples or Youtube tutorials, with the use of per…