Talk:Shaded-pole motor

From Wikipedia, the free encyclopedia

A recent posting on USENET asked (in effect) about the RPM - voltage characteristics of such motors, then (as so often on USENET), descended into a shouting match. Which is why I came here. I know which of the opinions I *think* is right, but I know that I don't know enough to be sure. so, is anyone monitoring this page who can cite sources and address this issue?

Message-ID: <01epd3535avsf07dbq48ce9pi50dsfj4qq@4ax.com> References: <HmgkyRO0rB3GFAZv@ifwtech.co.uk> <yrZjuD6iHK3GFwe9@ntlworld.com> [SNIP HEADERS] On Tue, 04 Sep 2007 00:10:34 GMT, raden <doesn't@matter.com> wrote: >Total bollocks - more volts - faster rotation > >the shaded pole is the pair of thick copper wires on the laminations, >its there to determine the direction of rotation, it has no effect on >the speed Shaded poles motors may be synchronous or non-synchronous, depending on how their rotor is constructed. For the small low-torque models used to drive timers, they're almost universally synchronous. Evenm the non-synchronous ones are pretty insensitive to increased voltage, as they're limited by the magnetic saturation of the core.

I thought that the geometry of the cage and the frequency of the AC determined the free-running speed of the motor, and the voltage (and current draw) the stalling torque. But IANA-physicist or electrical engineer. A Karley 07:40, 4 September 2007 (UTC)