Cross coupled current regulator

Details Cross coupled current regulator Cross coupled current regulator

1986-10-27

1987-07-14

Smith, Jr., David

Electric power conversion systems

Frequency conversion without intermediate conversion to d.c.

By semiconductor converter

363163, 363164, 318803, 318800, 318807, H02P 1330, H02P 540

Patent

active

046806954

ABSTRACT:
A current regulator for a variable frequency power supply includes a proportional plus integral circuit that produces a composite control output signal for each phase. To improve the performance of the current regulator at higher frequencies, the composite control output signal for each phase also inlcudes a cross coupled component which is produced by multiplying a d.c. signal proportional to frequency times an integrator output signal from another phase. The composite control signals are applied to a voltage source inverter which produces the output currents to a load.

REFERENCES:
patent: 4509003 (1985-04-01), Ohnishi et al.
patent: 4555755 (1985-11-01), Kurosawa et al.
Gabriel et al, "Microprocessor Control of Induction Motor", International Semiconductor Power Conference, Orlando, Fla. May 24-27, 1982.
Bose, Poik., "Adjustable Speed AC Drives-Technology Status Review", Proceedings of the IEEE, vol. 70, No. 2, Feb. 1982, pp. 116, 128 & 129.
Leonhard, W., Control of Electrical Devices, Springer-Verlag, 1985, pp. 224-237.
Gabriel et al, "Field Oriented Control of A Standard AC-Motor Using Microprocessors", Conference, Industry Applications Society IEEE-IAS Annual Meeting, Cleveland, OH. 30 Sep.-4 Oct.

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