Power Converter and Method for Operating a Power Converter

Simple SummaryContent extracted from patent full text and abstract with AI.

This patent describes a power converter (such as an inverter) that uses a specialized control method with a half-bridge configuration (two semiconductor switches and a filter coil) to achieve zero-voltage switching. By carefully timing the switching of the semiconductor devices—specifically, turning off a switch when the current through the filter coil reaches zero—the device minimizes switching losses while maintaining a defined maximum switching frequency. This leads to more efficient power conversion between DC and AC sources or loads.

Use CasesContent extracted from patent full text and abstract with AI.

• Variable frequency drives for electric motors (e.g., in industrial automation)
• Renewable energy systems (e.g., solar inverters for grid connection)
• Electric vehicle inverters (for driving AC motors from battery DC)
• Efficient power supplies for sensitive electronic equipment
• Power conditioning systems to improve energy quality in grids

BenefitsContent extracted from patent full text and abstract with AI.

• Significantly reduced switching losses, resulting in higher efficiency
• Lower heat generation allows for smaller cooling systems and potentially more compact designs
• Reduced electromagnetic interference (EMI), supporting compliance with strict EMC standards
• Increased reliability and potentially longer device lifespan due to less thermal and electrical stress
• Ability to use higher switching frequencies, allowing for smaller filters and improved dynamic performance

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

The invention relates to a power converter having a half bridge, comprising at least two semiconductor switches and a filter coil arranged at the connection node of both switching devices. The power converter is designed to carry out a voltage-free switching-on by individual adjustment of the switching times of the semiconductor switches and, thereby maintaining a maximum switching frequency and switching off a first of the semiconductor switches when the current flowing through the filter coil reaches 0 A.