My motor theory is fine, thanks for your concern.
Your understanding is more worrying where you claim your DC motors should not be supplied with DC.
Similarly if you don't know the difference between a unipolar motor and a ball bearing motor then you really ought to stop here.
Love to see harry trying to send square wave AC over a distance. ;-)
Indeed it can be regarded thus. The frequency in this case is zero.
What relevance has that to the discussion?
That is about as relevant to Tim+'s post as:
Why would it be alternating current is it never changes polarity? It does however indicate poor your poor understanding of basic electrics.
And that, in a nutshell, betrays your lack of understanding.
I asked you to tell me whether the motor I linked to was DC or AC, or what it was. You didn't respond.
I didn't look very hard.
THere are 'perpetual motion' machines that use the 'pressure of sunlight'. Too.
Modern bike lighting uses LEDs, so rectification does matter. (It's generally built into the light though, not the dynamo, so in that sense it doesn't matter.)
These days standlights generally use supercapacitors built into the lights though; it's only if you also want consistent output for something like a USB charger that cache batteries are used.
Think that's wrong. The rectifier acted as a one way valve to prevent the batteries discharging into the alternator when stopped. The batteries were dry cells. The system would change over to battery when the alternator output dropped - ie when stopped. Accompanied by a considerable drop in light output. Fitted as standard on the Raleigh Superb. That heavy green bike your school teacher rode.
I don't think Ni-Cads were around in 1952 - at least at a price a cyclist would pay for.
[...]
The 1952 illustration is labelled "Dry battery unit". The use of "a 6 volt (5 x 1.2v cell) nickel cadmium battery", also described on the same page, is not from 1952.
Ah. Certainly when I was into bicycles in the 50s, the cells used were primaries. And the auto switching (which used a rectifier) exclusive to Raleigh. As I rather fancied the same idea on my Philips. But it is a long long time ago.
Well it's still DC isn't it
Well it runs off DC;)..
Hence its a DC motor;!
It indicates your poor understanding of elementary maths. I spent forty years working with electrical machinery.
I don't see any link.
Clearly you have forgotten all about your experiences.
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