Patent · US Active

Active EMC filter

US9130541B2 · kind B2 · utility

1Cited by

6References

15Claims

0Family size

Assignee

Schaffner EMV AG · CH

Inventors

Eckart Hoene · Berlin, DE
Andre Domurat-Linde · Berlin, DE
Oleg Zeiter · Berlin, DE

Key dates

Filing date	Apr 15, 2014
Grant date	Sep 8, 2015
Priority date	—
Expiry date	Apr 15, 2034

Classification

Technology area (CPC H)Electricity
CPC primaryH02M1/123
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Active EMC filter connectable between an electric power source and an electric load. The filter has capacitors (C×N, C×U) connected between active conductors of the power source and a star point electric node. A filter capacitor (Cst, CstU) is connected between the star point and ground. A half-bridge has two switching devices (T3, T4; T1, T2) connected in cascade between a positive supply voltage and a negative supply voltage. A smoothing circuit (RgN, LgN; RgU, RgU) is connected between a common node of the switching devices and the star point. A control unit (Drive_N, Drive_U) drives the switching devices (T3, T4; T1, T2) digitally either in an ON-state or in an OFF-state, such as to limit a leakage current.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.