Position detection methods and apparatus for stepping motors

Details Position detection methods and apparatus for stepping motors Position detection methods and apparatus for stepping motors

1975-06-16

1978-02-14

Rubinson, Gene Z.

Electricity: motive power systems

Open-loop stepping motor control systems

H02K 3700

Patent

active

040741796

ABSTRACT:
Apparatus and controls for indicating the position of a stepping motor rotor as it successively steps and without the need for physically driven encoders or pulse generators, characterized by arrangements for sensing the current, or the rate of change of current, flowing in the motor windings. The intelligence indicating when the rotor reaches successive positions is applied advantageously to a utilization device such as a counter to signal the position of a driven load, and is used to control sequenced energization of the motor windings to create the advantages of a closed loop system but without a driven feedback device.

REFERENCES:
patent: 3304481 (1967-02-01), Saussele
patent: 3329852 (1967-07-01), Saussele et al.
patent: 3611081 (1971-10-01), Watson
patent: 3727121 (1973-04-01), Rich
patent: 3746959 (1973-07-01), Kobayashi et al.
patent: 3767993 (1973-10-01), Yablonski
patent: 3812413 (1974-05-01), Keidl

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