Resonant Converter Timing Control for Wide Power Range
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Solution Overview
Problem
Conventional resonant converters experience high energy losses at mid to low load conditions, making them unsuitable for applications requiring a wide range of power levels, such as radiation systems, where efficient power conversion is crucial to minimize costs and maintenance.
Innovation Solution
A resonant converter with a timing component that generates timing signals based on a devised timing schedule, taking into account the known impulse response, current measurements, and voltage measurements to optimize switching and reduce power losses across varying load conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional resonant converters operate at mid to low load conditions, then they can provide power conversion capability across a wide power range, but they experience high energy losses
Solution Approach 1:
The patent implements dynamic timing adjustment of switching elements based on real-time load conditions. The timing component modifies switching timings adaptively to maintain optimal resonant operation across varying load levels, enabling the converter to operate efficiently from full load down to 10% or lower loads while preserving the wide power range capability
Solution Approach 2:
The patent changes the timing parameters of switching elements dynamically based on load conditions. By adjusting switching timings as a function of load, the converter optimizes energy transfer efficiency at each operating point, reducing energy losses while maintaining the ability to operate across a wide power range from 20 kW down to 2 kW or lower
2Power
If resonant converters are designed for high power output, then they can meet radiation system power requirements, but they become inefficient at lower power levels
Solution Approach 1:
The timing component dynamically adjusts switching element timings based on actual load demands, allowing the high-power converter design to operate efficiently at reduced power levels. This dynamic adaptation enables efficient operation from full power output down to 10% or lower loads by optimizing resonant conditions at each operating point
Solution Approach 2:
The patent employs feedback mechanisms where timing adjustments are based on measurements of actual operating conditions including current through the resonant converter and voltage applied to the load. This feedback enables the system to automatically optimize efficiency at each power level, maintaining low losses across the entire operating range from high power output down to low power levels
Data Source
AI summary
A resonant power converter. An embodiment with a fullbridge converter is disclosed, controlled with feedback or feedforward technique. Switching schemes are either based on a sort of look up table or on measurement of current or voltage. Dead time may be adjusted. Timing may be such, that in the respective diagonal pairs of the converter, one switch is switched on for a different time (different pulse width) than the other. Use in a relative high power environment for about 20 KW in e.g. an X-Ray or Computer Tompgrapy System.