Electricity: motive power systems – Braking – Automatic and/or with time-delay means
Patent
1975-03-24
1977-05-31
Dobeck, B.
Electricity: motive power systems
Braking
Automatic and/or with time-delay means
318254, 318138, 318432, 318696, H02P 516
Patent
active
040272150
ABSTRACT:
A machine which operates like a DC commutator motor continuously variable in speed with load change or held to a fixed selectable speed. The machine includes a rotor member with means for producing a magnetic field therein fixedly oriented with respect to the rotor. The rotor is rotatably mounted within a stator which has a plurality of windings. Means are provided for applying periodic power pulses to the stator windings. When current passes through a stator winding, there is a torque due to the interaction of the winding generated flux and the rotor field, that causes the rotor to rotate. A power control system responds to signals induced in unpowered stator windings by the rotating rotor field to produce power pulses at a predetermined frequency. The pulse duration and amplitude are adjusted by the control system. These power pulses are applied to the stator windings in a predetermined sequence to produce a rotating field which causes the machine to operate like a DC commutator motor variable in speed with load change or held to a fixed selectable speed over a wide range of motor torques. The power control system additionally includes means for self-starting the machine in a desired direction of rotation.
REFERENCES:
patent: 3611081 (1971-10-01), Watson
patent: 3720865 (1973-03-01), Bregeault
patent: 3769555 (1973-10-01), Dolbachian
patent: 3783357 (1974-01-01), Ichiyanage
patent: 3809991 (1974-05-01), Loyzim
patent: 3835357 (1974-09-01), Holzer
Isaacson Milton S.
Knight John H.
Dobeck B.
Xerox Corporation
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