DUAL STACK TACHOMETER/GENERATOR

摘要

A low cost, linear, low impedance tachometer/generator is provided which includes a stator and a rotor. The rotor includes a plurality of magnetic poles which alternate between first and second polarities and the stator includes a plurality of first and second annular sets of poles which are spaced apart with the first set of poles having a first polarity and the second set of poles having a second polarity. An annular coil is disposed between the first and second sets of poles. The first set of poles is axially spaced apart and circumferentially offset one pole pitch about the axis of rotation from the second set of poles to effect simultaneous periodic alignment of the first set of poles on the stator with the plurality of poles on the rotor of the second polarity and the second set of poles on the stator with the plurality of poles on the rotor of the first polarity.