Electricity: motive power systems – Reciprocating or oscillating motor – Energizing winding circuit control
Patent
1980-03-10
1981-12-01
Miller, J. D.
Electricity: motive power systems
Reciprocating or oscillating motor
Energizing winding circuit control
318254, 318439, H02P 602
Patent
active
043038719
ABSTRACT:
A current sensing circuit monitors the currents flowing through the stator windings of a nutating motor. The current drive circuits for the windings are capable of delivering large currents with a fast rise time so that the magnetic circuits of the nutating motor quickly saturate, providing precise operation of the motor. Steering diodes quickly discharge the windings into the power supply. When a predetermined winding current level is exceeded, the current sensing circuit produces an output signal which momentarily disables the current drive circuits for the windings so that the stator winding currents are limited to levels sufficient to precisely operate the nutating rotor. The sensing circuit has a hysteresis characteristic which in conjunction with the energy stored in a winding causes the current in a winding to be maintained between certain maximum and minimum levels.
REFERENCES:
patent: 4081726 (1978-03-01), Leenhoots et al.
patent: 4107595 (1978-08-01), Campe
Miller J. D.
Morgan Actuators, Inc.
Redman John W.
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