Powerinbg a 240V AC fan from a microwave oven

[boylesg]

I measure the resistance of the coil at around 240R which means it should have about 1A passing through it.

So, although the magnet wire in the coil is very fine, I would have thought that it could take 1A.

However when I connected the engine up to the mains (carefully), it blew the house fuse.

Is this likely to be due to the engine being damaged - it was a discarded microwave that I got it from - or am I missing something about powering AC engines?

 

[kabeer02]

I measure the resistance of the coil at around 240R which means it should have about 1A passing through it.

So, although the magnet wire in the coil is very fine, I would have thought that it could take 1A.

However when I connected the engine up to the mains (carefully), it blew the house fuse.

Is this likely to be due to the engine being damaged - it was a discarded microwave that I got it from - or am I missing something about powering AC engines?

what ingine are you talking about?your question is not clear please.

 

[boylesg]

The fan/motor/engine out of a domestic microwave oven, minus the fan blades.

 

[FvM]

I measure the resistance of the coil at around 240R which means it should have about 1A passing through it.

The assumption is completely wrong. It's an AC motor and it's impedance is mostly reactive. We can assume a regular current consumption in a 0.1 - 0.2 A range.

However when I connected the engine up to the mains (carefully), it blew the house fuse.

In case of doubt the winding is defective.

Did you verify that the motor had been originally connected to 240V AC in the microwave? Most likely it is.

 

[boylesg]

Well I have not noticed that the fans are connected to a separate step down power source when I have been pulling the microwave ovens apart.