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alanjstepney
 
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Default Washing machne Motor wiring help!

Get the motor with its control module, and with minimal modification it will
make an excellent
variable speed motor for a lathe.
Been using one on my ML7 for years and it is very useful.
--


www.alanstepney.info
Model Engineering, Steam Engine, and Railway technical pages.





Later machines needed a lot more power for the high speed spin
cycles and these used high speed series wound commutator motors
because these can deliver much more power (1/2 to 1Hp short term
rated) for a given size and cost. The natural speed regulation of
series wound machines is inherently poor and electronic control is
essential for washing machine service. While crude form of speed
control is possible by sensing the back EMF of the motor this is not
good enough for the wide range of speed and loads needed for the
wash/spin cycles. Because of this pretty well all motors are fitted
with a "tacho" (tachometer) which is a very small (and very crude!) AC
generator which produces an electrical output directly proportional to
speed. A closed loop electronic speed control is used to adjust the
power input to the motor until it delivers the the desired speed
sensed by the tacho output.

Tacho output voltage or tacho output frequency can be used
to sense motor speed. Early controllers used discrete transistors and
a triac output. Later boards integrated most of the control functions
into a single IC - Motorola TDA1085C is typical.

Jim