Microprocessor-based control apparatus for a direct current mach

Details Microprocessor-based control apparatus for a direct current mach Microprocessor-based control apparatus for a direct current mach

1981-12-24

1984-11-20

Weldon, Ulysses

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318341, 318723, 318 79, 318493, H02P 506

Patent

active

044841175

ABSTRACT:
A microcomputer for use with a direct current machine drive system processes machine drive system currents and voltages to compute real time machine efficiency. From real time machine efficiency, the microcomputer determines optimum, that is to say, desired machine armature current and optimum machine air gap flux. Machine armature current and field current are regulated, respectively, by controlling machine armature voltage responsive to the difference in magnitude between optimum armature current and actual armature current, and by controlling machine field voltage responsive to the difference in magnitude between optimum machine air gap flux and actual machine armature flux, respectively, to assure machine operation at maximum efficiency irrespective of machine load conditions.

REFERENCES:
patent: 3950684 (1976-04-01), Peterson
patent: 4019107 (1977-04-01), Dixon et al.
patent: 4037144 (1977-07-01), Ohmae et al.
patent: 4247807 (1981-01-01), Wilson
patent: 4276505 (1981-06-01), Bose
Jackson et al., "Direct Digital Control of Thyristor Convertors," IFAC, Symposium on Control and Power Electronics and Electrical Drives, 70-74, pp. 431-441.
Fallside et al., "Direct Digital Control of Thyristor Amplifiers" Proc. IEE, vol. 116, No. 5, May 60, pp. 873-878.

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