SpeedFit

David2023

what is it mean of the Losses breakdown? Could you please help explain these parameters (Turn-on losses Eon and so on) ?

Whether the result of efficiency include the losses breakdown? Thanks.

Forum_Moderator

Thank you for your post, it has been approved and we will respond as soon as possible.

Urvi_Ahluwalia

Hi David2023,

Losses Overview section summarizes the switching, conduction losses and combined losses in all devices, and also per switch position. 

Losses Breakdown section further quantifies the different kinds of switching and conduction losses. Please note, losses breakdown values are total semiconductor losses for the converter and not per switch position (in Watts). The different kinds of losses are:

Note: No Magnetic component losses are included in Speedfit. The efficiency number is based on the losses of the semiconductor devices in the topology.

1. Switching Losses are quantified as :

• Turn-on Loss : switching loss during turn-on transition of the device
• Turn-off Loss : switching loss during turn-off transition of the device

2. Conduction losses are of three types : 

• Forward conduction : power loss during first-quadrant conduction of the devices
• Reverse conduction : loss during third-quadrant conduction of the devices
• Body-diode conduction : loss when only body-diodes conducts during the dead-time 

Switching loss = Turn-on Loss + Turn-off Loss

Conduction loss = Forward conduction loss + reverse conduction loss + body-diode conduction loss

Combined Losses = Switching losses + Conduction Losses

I hope this answers your question.

Thanks,

Urvi

David2023

Thanks a lot!

TBhatia

Hi, I hope that this answered your question. I will close this discussion for now but if you have a follow up question, please "Start a New Discussion" and we would be glad to support you further.