Explainer video · TEMISA

Burnout oven when rewinding a motor: protecting the core at 360 °C

Short answer

To rewind, the old winding is burned off in an oven, but the core has laminations with very thin insulation between them. If they overheat, losses rise and the motor runs hotter. The reference EASA cites for organic interlaminar insulation is not exceeding 360 °C. That's why the oven is controlled and the core is tested before and after.

Key points

The old winding is burned off in an oven.
Core laminations have very thin insulation between them.
Overheating raises losses and the motor runs hotter.
EASA cites 360 °C for organic interlaminar insulation.
The core is tested before and after the rewind.

Transcript

Why can a rewound motor come out worse than before? It's not the new copper, it's the core. To rewind, the old winding is burned off in an oven, but the core has laminations with very thin insulation between them. Like baking bread at full heat: it looks the same outside, but inside it's ruined. If the laminations overheat, losses rise and the motor runs hotter. The reference EASA cites for organic interlaminar insulation is not exceeding 360 °C. But careful, a damaged core isn't fixed by a good winding. That's why the oven is controlled and the core is tested before and after. So it's not just rewinding, it's protecting the core. Was your core tested? Comment CORE and we'll tell you what to check.

Frequently asked questions

What temperature should the oven not exceed?

The video cites the EASA reference for organic interlaminar insulation: 360 °C.

Does a good winding fix a damaged core?

No, which is why the core is tested before and after.

Does TEMISA test the core when rewinding?

Yes, at the Tlajomulco shop. Email ventas@temisa.mx.

Video with images and narration generated with AI.

See the service: Motor rewinding

Request a quotation by email: ventas@temisa.mx. Phone: +52 33 3614 2460.