Quote:
Originally Posted by sourbiscuits
Quote:
Originally Posted by Analogue man
It is possible to control the speed (downwards) on a motor that has a run capacitor by connecting a rheostat across the capacitor terminals and connecting the supply wire to the wiper of the rheostat but once the wiper reaches just beyond the mid point of the rheostat the motor will start to run backwards. I did this on some older Grundig recorders in my (much) younger days.
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That's helpful thank you! In theory, could I not hook up the rheostat directly between the power source and the motor (in case there isn't a run cap)? |
No, the motors are mains frequency synchronous and hence will always try to run at the normally correct speed but produce less torque.