I was reading that if a iron powder core is heated to much (above curie) PERMANENT damage may occur.
But nobody mentions exactly what this PERMANENT means.
Will it increase eddy current losses for example under normal conditions?
Background: I have a booster circuit whose inductor has heated so much it fell out of the circuit, at least 200 deg Celsius. Rewound the inductor but the core heats way too much at 200kHz switching frequency. (the core heats, not the wire !)
This is a design in a TV set.... Everything else looks good, no saturation, only 1.2A average current through the inductor etc...
But nobody mentions exactly what this PERMANENT means.
Will it increase eddy current losses for example under normal conditions?
Background: I have a booster circuit whose inductor has heated so much it fell out of the circuit, at least 200 deg Celsius. Rewound the inductor but the core heats way too much at 200kHz switching frequency. (the core heats, not the wire !)
This is a design in a TV set.... Everything else looks good, no saturation, only 1.2A average current through the inductor etc...