Power Converter Compensation Voltage for Switching Error Suppression
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Solution Overview
Problem
Power converters generate undesired high-frequency disturbance powers due to error voltages produced by switching electronic elements, leading to unwanted emissions and inefficiencies.
Innovation Solution
A power converter with controllable voltage sources that generate compensation voltages with specific time profiles to reduce error voltages, utilizing a broader bandwidth than the switching elements, and can be integrated within the phase modules or AC/DC voltage connections to effectively mitigate high-frequency disturbance powers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If electronic switching elements are used for power conversion, then power conversion functionality is achieved, but high-frequency error voltages and disturbance powers are generated
Solution Approach 1:
The patent utilizes the high-frequency error voltage generated by switching elements as a feedback signal. A feedback device detects this error voltage and generates a compensating control signal that, when applied to the switching elements, converts the harmful disturbance into a beneficial correction mechanism, thereby reducing the overall disturbance power while maintaining power conversion functionality.
Solution Approach 2:
The patent implements a feedback mechanism where a feedback device monitors the error voltage generated during switching operations. The detected error voltage is processed to generate a compensating control signal that is applied back to the switching elements, creating a closed-loop system that continuously reduces high-frequency disturbances while maintaining efficient power conversion.
2Productivity
If switching frequency is increased to improve power conversion efficiency, then conversion speed increases, but error voltage frequency and disturbance spectrum broaden
Solution Approach 1:
The feedback device continuously monitors error voltages across the broadband frequency spectrum generated by high-frequency switching. By processing this feedback information and applying compensating control signals, the system maintains high conversion efficiency while actively suppressing the broadband disturbance spectrum that would otherwise result from increased switching frequencies.
Solution Approach 2:
The patent dynamically adjusts switching parameters based on detected error voltages. By changing switching timing and duration parameters in response to real-time feedback, the system optimizes conversion efficiency at each operating point while minimizing the generation of broadband disturbance powers across the frequency spectrum.
Data Source
AI summary
A power converter contains at least one phase module which has a plurality of modules which are electrically connected in series. Each module has a first electrical module connection, a second electrical module connection, a first electronic switching element, a second electronic switching element and an electrical energy storage device. The phase module is assigned at least one controllable voltage source which is suitable for generating a compensation voltage in response to a corresponding actuation, the compensation voltage has a time profile such that it reduces an error voltage generated by the switching of the first electronic switching elements and the second electronic switching elements of the module.