Electricity: motive power systems – Open-loop stepping motor control systems
Patent
1987-04-29
1988-04-19
Shoop, Jr., William M.
Electricity: motive power systems
Open-loop stepping motor control systems
318685, 318811, H02P 800
Patent
active
047392401
ABSTRACT:
A commutator for a microcomputer based switched reluctance drive employs a selectively addressable non-volatile memory, e.g. a ROM, to store stator phase firing patterns and facilities selective adjustment of turn-on angle and pulsewidth of phase switching current pulses. Firing patterns differing only in pulsewidth of their respective pulses can be stored in different sections of the memory or in the same section where word bit width permits. The adjustment of pulse position and duration allows torque control of the motor over a very wide speed range.
REFERENCES:
patent: 4270074 (1982-05-01), Duckworth et al.
patent: 4368411 (1983-01-01), Kidd
patent: 4489267 (1984-12-01), Saar et al.
patent: 4602882 (1986-07-01), Akazawa
Chappell et al., "Microprocessor Control of a Variable Reluctance Motor", IEEE Proc. B., vol. 131, Pt B, No. 2, Mar. 1984, pp. 51-60.
"Universal Brushless Motor Commutator", L. Thompson et al., 13th Annular Symposium on Incremental Motion Control Systems and Devices, Urbana, Ill., May 1984, pp. 41-47.
"Microcomputer Control of Switched Reluctance Motor", by B. K. Boxe et al., Conference Record of Oct. 1985, IEEE Industry Application Society Annual Meeting, pp. 1-6.
MacMinn Stephen R.
Szczesny Paul M.
Bergmann M.
Davis Jr. James C.
General Electric Company
Shoop Jr. William M.
Snyder Marvin
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