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Magnetic Pulse Emitter

IP.com Disclosure Number: IPCOM000091410D
Original Publication Date: 1968-Jan-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 51K

Publishing Venue

IBM

Related People

Darling, RH: AUTHOR

Abstract

This magnetic pulse emitter produces accurate equally spaced pulses synchronized with a rotating shaft. The emitter comprises rotor 10 having a plurality of equally spaced external teeth and stator 12 having internal teeth mounted concentric with the rotor 10. Coil 14 is mounted to provide flux coupling between rotor 10 and stator 12 and this coil is energized by a constant current DC source comprising voltage source 20 and coil 18. Relative motion between rotor 10 and stator 12 caused by the turning of shaft 16 causes the flux around coil 14 to vary as the average air gap varies by sensing the output voltage across coil 14 which is proportional to the total flux change through the circuit. The output signal is of absolutely accurate equal divisions when measured at the zero signal crossover point of the waveform.

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Magnetic Pulse Emitter

This magnetic pulse emitter produces accurate equally spaced pulses synchronized with a rotating shaft. The emitter comprises rotor 10 having a plurality of equally spaced external teeth and stator 12 having internal teeth mounted concentric with the rotor 10. Coil 14 is mounted to provide flux coupling between rotor 10 and stator 12 and this coil is energized by a constant current DC source comprising voltage source 20 and coil 18. Relative motion between rotor 10 and stator 12 caused by the turning of shaft 16 causes the flux around coil 14 to vary as the average air gap varies by sensing the output voltage across coil 14 which is proportional to the total flux change through the circuit. The output signal is of absolutely accurate equal divisions when measured at the zero signal crossover point of the waveform. The amplitude of the output waveform is relatively large and of a relatively constant magnitude since this output is due to a summation of the flux paths of each of the matching teeth.

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