14 Jul
2021
14 Jul
'21
12:09 p.m.
On 7/14/21 11:50 AM, Paul Koning via cctalk wrote:
Induction motors draw relatively constant CURRENT, but the
phase angle changes with load.
So, the real power draw? increases with increasing load.
If you assume power equals current times voltage, then you
get a wrong indication, by neglecting oiwer factor.
Jon
On Jul 14, 2021, at 12:33 PM, Guy Sotomayor via
cctalk <cctalk at classiccmp.org> wrote:
I've found 2 issues w.r.t. "rotary converters".
* They *always* consume lots of power regardless of the actual load
Really? That
seems odd. A rotary converter is merely a three phase motor with run capacitors. Just
like any other motor, its power demand depends on the applied load. A normal motor
spinning without anything connected to it consumes power to overcome electrical,
magnetical, and friction losses, but none of these are particularly large.