Commutator for switched reluctance drive

Details Commutator for switched reluctance drive Commutator for switched reluctance drive

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.

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