Circuit arrangement with a number of frequency converters, parti

Details Circuit arrangement with a number of frequency converters, parti Circuit arrangement with a number of frequency converters, parti

1976-01-07

1977-02-15

Beha, Jr., William H.

Electricity: motive power systems

Motor-reversing

Armature or primary circuit control

318227, H02P 1330

Patent

active

040084280

ABSTRACT:
A circuit arrangement is disclosed having an odd number of Y-connected frequency converters. The control units of the frequency converters are associated with current regulators, all of which are addressed by an additional common reference value. In accord with the invention, the aforesaid reference value is derived by generating a difference voltage corresponding to the difference of the voltages at the neutral point of the frequency converter circuit and the neutral point of the load. This difference voltage is then passed through a delay member whose time constant corresponds to the time constant of the load to develop the reference value.

REFERENCES:
patent: 3332002 (1967-07-01), Jollois
patent: 3775649 (1973-11-01), Bayer et al.
patent: 3942091 (1976-03-01), Weibelzahl

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