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HYBRID ACTIVE FILTER

IP.com Disclosure Number: IPCOM000257178D
Publication Date: 2019-Jan-18
Document File: 13 page(s) / 1M

Publishing Venue

The IP.com Prior Art Database

Related People

Authors:
Rohr Eduardo Schweizer Mario

Abstract

The disclosure is related to a filter arrangement that may be used in connection with electric drives and power converter devices. A solution is suggested that combines advantages of a passive LC filter and an active filter cell. The solution may include a main power stage operating at a low switching frequency, a main LC filter tuned at a high resonance frequency, and an additional converter that provides damping of the main LC filter and inject current harmonics not damped by the main LC filter. The additional converter can operate with much reduced voltages and currents, but with higher switching frequency. The additional converter and LC filter are not subject to neither the main converter voltage nor the main converter current.