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"The Enlightenment" wrote in message ...
Its sounds crude but was quite accurate. A full serve system would involved resistors for position sensing that were amplified in DC, amplidynes which operated in AC to generate mathematical functions such as sine, cos etc (amplidyne is a sort of rotary transformer in which the overlap of the poles of the two secondary windings are added/subtracted from each other. The area of he poles can be used to generate voltages that are functions of shaft position. By the way, I think you are confusing "Amplidyne" with "Synchro" and "Selsyn". An Amplidyne is a special motor-generator that basically acts like a magnetic amplifier - vary the fields a little and get a larger change on the output. A Synchro (or Selsyn) is what you mean - a rotary transformer that can transmit angular data electrically (generally with three wires as multiphase AC). The things that can generate the sine and cosine from an angular shaft position are called "Synchro Resolvers". William Donzelli |
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