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Unread 07-02-2002, 14:23
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Unhappy Internal Fuses (PTC Resistors) on Window Motors

We are using a window motor on a clamp, and we notice that when we activate the clamp over and over it loses power as it heats up....eventually not opening at all.

It looks as though the motor has an internal thermal protection device....but not really a fuse, but some sort of Positive Temperature Coeficient Resistor that slowly "opens" up and lowers motor current.

Is this true.....are there specs on this motor that will describe this protection circuit?

Is there any to remove this feature? (I doubt it)

-Quentin
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