Electricity: motive power systems – Plural – diverse or diversely controlled electric motors – Braking
Patent
1983-03-24
1984-07-17
Dobeck, B.
Electricity: motive power systems
Plural, diverse or diversely controlled electric motors
Braking
318759, 318102, 318318, 318314, 318 85, H02P 774, H02P 322
Patent
active
044608535
ABSTRACT:
An inertial measuring unit gyroscope wheel dynamic braking and sequence inhibiting circuit is disclosed. The circuit comprises a first counter for counting a specified time interval and digital logic circuitry for applying an in-phase signal to the phases of a multiphase electric induction motor driving a gyroscope wheel during the time interval, for example, a vertical gyroscope motor wheel. By placing in-phase signals on the inputs of a multiphase electric induction motor, the motor is brought completely to rest in a short time by dynamic braking. In a preferred embodiment, a second counter counts a second specified time interval after the first time interval has terminated, during which second time interval a second electric induction motor is dynamically braked, for example, an azimuth gyroscope wheel motor. During the time period when the motors are braking, a signal is fed back to an automatic sequencing circuit to inhibit further sequencing of the inertial measuring unit.
REFERENCES:
patent: 3694716 (1972-09-01), Eland
patent: 3967170 (1976-06-01), MacDonald et al.
patent: 4100466 (1978-07-01), Schroeder
patent: 4295086 (1981-10-01), Cutler et al.
patent: 4339703 (1982-07-01), Rolff et al.
Altmiller John C.
Dobeck B.
Ip Paul Shik Luen
Kennedy Thomas W.
The Singer Company
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