Zero adjustment shaft encoder control for stepping motors

Details Zero adjustment shaft encoder control for stepping motors Zero adjustment shaft encoder control for stepping motors

1992-04-03

1993-10-26

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

With particular motor control system responsive to the...

318696, G05B 1940

Patent

active

052569438

ABSTRACT:
A stepping motor has an attached encoder which provides automatic commutation point alignment for maximum efficiency and torque during closed-loop operation. Novel use of a fine line encoder along with a phase mapping circuit permit shaft/rotor alignment of the stepping motor with minimum commutation errors, and without the need for manual adjustments.

REFERENCES:
patent: 4025837 (1977-05-01), Meier et al.
patent: 4426608 (1984-01-01), Larson et al.
patent: 4591774 (1986-05-01), Ferris et al.
patent: 4710690 (1987-12-01), Reid et al.
patent: 4761598 (1988-08-01), Lovrenich
patent: 4855660 (1989-08-01), Wright et al.
patent: 4868477 (1989-09-01), Anderson et al.
patent: 4961038 (1990-10-01), MacMinn
"A Stepping Motor Primer Part I: Theory of Operation" by Paul Giacomo; Byte Publications, Inc., Feb. 1979; pp. 90-105.
"A Stepping Motor Primer Part 2: Interfacing and Other Considerations" by Paul Giacomo; Byte Publications, Inc., Mar. 1979; pp. 142-149.

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