Electricity: motive power systems – Open-loop stepping motor control systems
Patent
1999-08-16
2000-09-12
Ip, Paul
Electricity: motive power systems
Open-loop stepping motor control systems
318685, 318560, 318652, G05B 106
Patent
active
06118246&
ABSTRACT:
A method and system (10) for simultaneous operation of primary (14A-14D) and redundant (16A-16D) motor windings in a redundant stepper motor (12). The redundant motor system (10) has a control circuit (11) including a phase synchronizer (36) for establishing a relationship between predetermined primary and redundant motor windings (14A-14D and 16A-16D) such that the power consumption is increased and the motor torque is affected. In one embodiment of the present invention the predetermined motor windings (14A-14D and 16A-16D) are operated in phase thereby doubling the power consumption and increasing the torque. In another embodiment, the predetermined motor windings (14A-14D and 16A-16D) are operated in phase quadrature thereby doubling the power consumption and increasing the torque by less than 50%. In yet another embodiment, the predetermined motor windings (14A-14D and 16A-16D) are operated out of phase with each other thereby doubling power consumption and producing zero torque.
REFERENCES:
patent: 4349772 (1982-09-01), Weiss
patent: 5936370 (1999-08-01), Fukao et al.
patent: 5990651 (1999-11-01), Iwazawa et al.
patent: 6014003 (2000-01-01), French
Gudmestad Terje
Hughes Electronics Corporation
Ip Paul
Sales M. W.
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