Power Converter and Method for Operating a Power Converter

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

The invention relates to a power converter (such as an inverter or rectifier) featuring a control method that enables voltage-free (soft) switching of power semiconductor devices, specifically within a half-bridge topology. The control system individually calculates the optimal switching times to ensure soft switching and minimizes current ripple, while also enforcing a maximum permissible switching frequency. This approach enables more efficient and reliable converter operation, particularly when driving electric actuators like motors, by reducing switching losses and electromagnetic interference.

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

• Electric motor drive systems, including industrial variable frequency drives (VFDs)
• Electric vehicle powertrains and onboard chargers
• Renewable energy inverters for solar or wind power systems
• Uninterruptible power supplies (UPS) and grid-tied converters
• Power supplies for data centers or sensitive electronic equipment
• Automation systems requiring high-speed, efficient power management

BenefitsContent extracted from patent full text and abstract with AI.

• Significantly reduces switching losses in power semiconductors, improving overall energy efficiency.
• Allows for softer switching at defined maximum frequencies, enhancing device reliability and lifespan.
• Limits electromagnetic interference (EMI), simplifying regulatory compliance (e.g., EMC standards).
• Minimizes current ripple, yielding smoother output and better motor or load performance.
• Flexible implementation for both single-phase and three-phase converter systems.
• Suitable for use with wide-bandgap devices (e.g., GaN, SiC switches) that support higher frequencies and greater efficiency.

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

The invention relates to a power converter having a half bridge comprising at least two power semiconductor devices, configured for pulse width modulation by means of the half bridge, and also designed to carry out voltage-free switching by means of individual adjustment of the switching times of the power semiconductor devices. The power converter is designed to switch the power semiconductor devices with a definable maximum frequency.