Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Resonant Inductor heating

Status
Not open for further replies.

sabu31

Advanced Member level 1
Joined
Jan 28, 2011
Messages
431
Helped
12
Reputation
24
Reaction score
13
Trophy points
1,298
Activity points
5,026
Hi all,

I use a series-parallel resonant converter for induction heating (from DC supply 36V).
The inductor current is sinusoidal with a peak of 45A. Also, the resonant frequency /switching frequency is 76kHz.The value of inductance used is 10.8uH using 5 turns .

During testing the inductor core temperature is rising to 125 Degrees Celsius.

Is the chosen core suitable or what else can be done to reduce heating?
 

Attachments

  • NPS250060.pdf
    784.9 KB · Views: 100

yes an inductor is needed as a well matched load is mainly resistive with varying levels of inductance - dropping to near zero when the steel being heated ( for example ) gets taken above its Curie Temp ( no longer magnetic )
 

Not obvious at first sight why an induction heater needs a resonant inductor.
Its regarding this inductor (10uH)
--- Updated ---

you want a lower perm core - and a bit bigger, with one or two more turns to get the core losses down ...
Most of the cores I have seen in these (have permeability of 60,90,125). The core used has permeability of 60u
Is there any other work around .
 

Attachments

  • Circuit.jpg
    Circuit.jpg
    44.7 KB · Views: 67

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top