Demodulators – Amplitude modulation demodulator – Having specific distortion – noise or other interference...
Patent
1979-06-12
1981-11-03
Moore, David K.
Demodulators
Amplitude modulation demodulator
Having specific distortion, noise or other interference...
329 2, 329207, H03D 318
Patent
active
042988420
ABSTRACT:
A demodulator for the demodulation of polyphase voltages of n phases, interfering among themselves which constitute a system of polyphase pseudo-sinusoidal voltages modulated in amplitude to a pulsation .epsilon., in order to obtain a system of polyphase voltages of pulsation .epsilon.. The demodulator is preferably formed by n heteropolar synchronous rotating polyphase machines and includes n stators of n phases, fed by n systems of polyphase pseudo-sinusoidal voltages modulated in amplitude to a pulsation .epsilon., and of the form ##EQU1## in which i represents the index of the group of voltages and varies from 1 to n, and p represents the index of phase of the group of voltages and varies from 1 to n. Mounted for rotation with the n stators are n wound rotors, each including magnetic circuits made up of a low loss material and capable of passing an alternating magnetic flux without damping, each rotor having the same number of poles as the corresponding stator. Slip-rings that rotate with the rotors and stationary brushes are provided to collect n systems of polyphase voltages of pulsation .epsilon. from the n rotors.
REFERENCES:
patent: 3049673 (1962-08-01), Barry
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