Powered Reclining Armchair

[malana-3]

My disabled wife uses a reclining armchair powered by two rechargeable 9 volt batteries, so the electric motor runs on 18 volts. The battery pack is currently out of order and the service engineer has temporarily installed a mains powered transformer supplying 29 volts. The chair is so much more responsive that I would like to consider making this change permanent. Would there be any long term detrimental effect to the motor or is this increased voltage insignificant? (My apologies if this question should have been directed to the Technology page).

[Wak]

If I remember correctly, Volts (V) = current (I) x resistance (R).
The resistance will remain constant in the motor therefore the current will increase creating more heat which could possibly damage the motor windings eventually.
I'd be inclined to ask the manufacturer of the chair about the increased voltage as it could possibly affect the guarantee should you have to use it for a claim.
I suppose it all depends upon the original capacity or power of the motor.

[scotman]

I agree with Wak that long term this will not do the motor any good. It depends on the quality of the motor and whether it is used continuously or intermittently with time to cool down between uses.
Check with manufacturer. Also is this still under warranty as if motor fails subsequently you need to be sure warranty is still good.