Probably, but I'm not at the OP's house to take a look and be certain this
is the case, and as the symptoms are classic signs of worn brushes, I
thought I'd mention it in case.
The rest of my advice about looking for bad connections before replacing
components is perfectly valid as well.
How many tumble driers use brushed motors?
How many brushed motors also have a capacitor?
Now this assumes that it _is_ a capacitor of course. If it does have a
brushed motor, I wouldn't be surprised if it had a line filter instead
and these can look very similar to capacitors.
You use induction motors whenever you can - they're quieter (this is a
domestic appliance after all) and they're cheaper. The advantage of the
brushed motor is that they have much higher torque at low speeds or when
stalled (why they appear on power tools) and they're also more easily
controllable for variable speeds etc. There's a lot of things a washing
machine does that a tumble drier just doesn't need.
Induction is cheaper for a specific power, or for almost all large
motors. Brushed is cheaper for small low powered motors that still need
high torque. If you can go to a direct-drive design, then using a
brushed motor and no gearbox is usually cheaper, but you need a motor
that can provide the required torque on its own shaft.
There is a TB regarding capacitors on White Knight TD's, the fault is caused
by the capacitor being affixed too close to the motor, the spare part now
includes a bracket to move it further away. Sometimes even when the part is
replaced the motor subsequently burns out if the windings have been damaged
by a stalled motor.
Why do you say that? Most European washing machines use series wound
universal motors with carbon brushes. I've got a Creda washer sitting in
my basement right now awaiting arrival of a set of brushes amoung other
things, no idea how it ended up on this side of the pond but it's a cool
Yeah somehow I missed that we were discussing a dryer. The matching
Creda dryer does in fact have an induction motor in it, weird to see a
clothes dryer that will plug into a 15A 240v receptacle, US dryers are
almost universally 4KW.
A European washing machine operates its motor at a large
number of different speeds (and even gradually vary the
speed in some cases) throughout various stages of the
wash cycle, and depending on the wash program selected.
This is most easily done with a universal motor combined
with an electronic speed control board and servo feedback.
(It used to be done with an induction motor and solenoid
operated gearbox 40 years ago, but that's more expensive
and a lot less flexible.)
Tumble driers only have to be able to reverse the drum,
but don't need to change the speed. For this simpler
requirement, an induction motor tends to win.
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