Method and switching arrangement for changing a switching state of a switching half-bridge

US10778087B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Andreas März · Leinburg, DE
• Mark-Matthias Bakran · Erlangen, DE

Key dates

• Filing date: Oct 16, 2017
• Grant date: Sep 15, 2020
• Expiry date: Nov 3, 2037

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03K2217/009
• WIPO field: Basic communication processes
• WIPO sector: Electrical engineering

Abstract

A switching half-bridge has two field-effect transistors and a supplementary circuit arranged upstream of a gate terminal of a first field-effect transistor and formed of a first circuit branch having a damping resistor and an inductor connected in series with the damping resistor and a second circuit branch being connected in parallel with the first circuit branch and having a series resistor and an auxiliary switch connected in series with the series resistor. The half-bridge can be switched from a first switching state to a second switching state, wherein while the auxiliary switch is open, a change in the control voltage causes the first circuit branch to temporarily change the gate-source voltage of the first field-effect transistor from the switch-on level to a second switch-off level greater than a first switch-off level, with the gate-source voltage thereafter returning to the first switch-off level.