Half-bridge LLC resonant converter with voltage monitoring across series capacitor
The half-bridge LLC resonant converter with split capacitors and clamping diodes, combined with a voltage divider and dual comparators, addresses the slow reaction time issue, providing rapid fault detection and protection without additional complexity or cost, ensuring reliability and safety.
WO2026104060A1PCT designated stage Publication Date: 2026-05-21TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
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Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
- Filing Date
- 2024-11-19
- Publication Date
- 2026-05-21
AI Technical Summary
Technical Problem
Existing half-bridge LLC converters face challenges in achieving fast reaction times to over-current or output short-circuit events without compromising efficiency, cost, or design robustness, often requiring complex and expensive components.
Method used
A half-bridge LLC resonant converter with split resonant capacitors and parallel clamping diodes, utilizing a voltage divider circuit and dual voltage comparators to rapidly detect voltage jumps across capacitors, enabling fast fault detection and protection without additional complexity or cost.
Benefits of technology
The solution allows for fast reaction to over-current or short-circuit events within microseconds, protecting the circuit without increasing power loss or cost, and ensuring reliability and safety.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure EP2024082899_21052026_PF_FP_ABST
Abstract
There is provided a half-bridge LLC resonant converter. The half-bridge LLC resonant converter comprises a half-bridge inverter. The half-bridge LLC resonant converter comprises an LLC resonant tank circuit. The LLC resonant tank circuit comprises a transformer, a first resonant capacitor and a second resonant capacitor. The half-bridge LLC resonant converter comprises a rectifier. The half-bridge LLC resonant converter comprises a first clamping diode and a second clamping diode, each connected in parallel with a respective one of the first resonant capacitor and the second resonant capacitor. The half-bridge LLC resonant converter comprises a voltage divider circuit. The voltage divider circuit is connected across one of the first resonant capacitor and the second resonant capacitor. The half-bridge LLC resonant converter comprises at least one voltage comparator connected to the voltage divider circuit.
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