On 24 February 2012 17:30, Lars Andersson <l...@larsandersson.com> wrote:

> You can run a BLDC from a dumb fixed frequency three phase supply if only
> you can get it to spin in the first place.

It will probably start from rest, certainly with a soft-starting VFD,
and will run synchronously.
However, running synchronously the phase lead will depend only on
load, and will be very small. The field will be almost 100% direct and
zero quadrature.
The effect of this is (I think) that the back-emf is very small, and
the current very high, for a given torque.

-- 
atp
The idea that there is no such thing as objective truth is, quite simply, wrong.

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