Harmonic neutralization of static inverters by successive stagge

Details Harmonic neutralization of static inverters by successive stagge Harmonic neutralization of static inverters by successive stagge

Filed on

1992-04-15

Date issued

1994-08-09

Examiner

Voeltz, Emanuel T.

Patent Class

Electric power conversion systems

SubClass

Current conversion

SubSubClass

Having plural converters for single conversion

Other Related Categories

363 41, 363 43, 363 64, 307105, H02M 112

Type

Patent

Status

active

Patent number

053372271

Description

ABSTRACT:
Quasi-harmonic neutralized inverter systems are provided with interphase transformers connected in a waffle tree configuration and each having a pair of inputs for receiving staggered voltage waveforms, wherein the stagger angle of the voltage waveforms reduces a harmonic component of an output voltage on an output terminal of each interphase transformer. Inverters produce voltage waveforms at phase angles necessary to provide the required stagger angles at the inputs of the interphase transformers in a first stage of the waffle tree configuration. A method for quasi-harmonic neutralization of voltages in an inverter system is also provided, in which interphase transformers, each having a pair of inputs for receiving staggered voltage waveforms, are connected in a waffle tree configuration, such that the stagger angle of the voltage waveforms reduces a harmonic component of an output voltage on an output terminal of each interphase transformer. Voltage waveforms at phase angles necessary to provide the stagger angles are applied to the inputs of the interphase transformers in a first stage of the waffle tree configuration.

REFERENCES:
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patent: 3628123 (1971-12-01), Rosa et al.
patent: 3792286 (1974-02-01), Meier
patent: 4870557 (1989-09-01), Stacey
patent: 4975822 (1990-12-01), Lipman
patent: 5040105 (1991-08-01), Dhyanchand et al.
patent: 5041957 (1991-08-01), Dhyanchand et al.
patent: 5041958 (1991-08-01), Dhyanchand et al.

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