I have built a couple of washing machine motor controllers that were used with hotpoint motors, both designs were just fancy phase angle light dimmers and ran open loop, as most washer motors are universal brushed ones.
I was thinking of modding one to run closed loop with a pic micro, so the rotor speed remains constant on and off load.
I doubt its the kind of thing that people mess with often but was wondering if anyone knew anything about the tacho's found on the back of washer motors, are they a voltage o/p, so many v per 1000 revs, or are they a frequency o/p so many pulses per rev.
Last time I looked at this I considered a tda1085, but they are obsolete now, so it'll be a pic.
I was thinking of modding one to run closed loop with a pic micro, so the rotor speed remains constant on and off load.
I doubt its the kind of thing that people mess with often but was wondering if anyone knew anything about the tacho's found on the back of washer motors, are they a voltage o/p, so many v per 1000 revs, or are they a frequency o/p so many pulses per rev.
Last time I looked at this I considered a tda1085, but they are obsolete now, so it'll be a pic.