Patent · US Expired

Protective circuit for a network-controlled thyristor bridge

US6903911B2 · kind B2 · utility

3Cited by

4References

8Claims

0Family size

Assignee

Siemens AG Österreich · AT

Inventors

Wilhelm Reischer · Wien, AT
Leo Karl · Dresden, DE
Heinz Pichorner · Steyr, AT
Franz Wohrer · Puchenau, AT

Key dates

Filing date	Jul 5, 2001
Grant date	Jun 7, 2005
Priority date	—
Expiry date	Apr 5, 2022

Classification

Technology area (CPC H)Electricity
CPC primaryH01L2924/0002
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A protective circuit (SCH) for a line-commutated thyristor bridge (B, B′), which is designed for feeding energy of a power circuit connected to the bridge and also for feedback from this circuit, and which is connected between the thyristor bridge and the power circuit. In a series branch of the protective circuit, there is at least one IGBT transistor (GT1, GT2), which is biased in the feedback direction with an inverse-parallel diode (D1, D2; D1p), and which can be deactivated for the appearance of a tipping recognition signal (sk, Us1), which is supplied by a control circuit (AST) associated with the transistor.

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