Thanks for the replies so far.

Is it true that a generator becomes physically harder to turn the higher th=
e current load?

Presumably in that case a petrol diesel generator must have some way of aut=
omatically detecting this and increasing the power to the engine?

Sent from  iPhone

On 18 Feb 2011, at 17:31, "M.L." <m@lkeng.net> wrote:

> On Fri, Feb 18, 2011 at 10:15 AM, Andrew Wood <a.j.w@me.com> wrote:
>> Hi Sean
>>=20
>> Would a DC generator suffer from that to the same extent?
>>=20
>>=20
>> Andrew
>>=20
>=20
> Any rotating motor is actually an AC machine. A DC motor or generator
> has a commutator that switches the terminals at the appropriate point
> through a rotation, thus either converting the alternating current to
> DC, or vice-versa. If you had current of a single polarity, you would
> be unable to produce a changing magnetic field. So no, a DC generator
> is going to be subject to the same limitations as an AC motor (or
> 'generator'.)
>=20
> --=20
> Martin K.
> --=20
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