Voltage Converter Testing via Impedance Matching
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Solution Overview
Problem
Existing methods for testing voltage converters, such as conventional and Low Power Voltage Transformers (LPVTs), are cumbersome and expensive, requiring extensive equipment for accurate frequency-dependent transmission behavior measurement, especially in decentralized power grids with increasing transient voltage pulses and harmonics.
Innovation Solution
A portable device comprising a frequency response analyzer and an impedance converter, which outputs test signals with variable frequency and voltage, and adjusts impedance to match the voltage converter's impedance, allowing for precise measurement of frequency-dependent transmission properties on-site.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If extensive electrical apparatuses are used for measurement methods, then measurement precision is improved, but device complexity increases and costs increase
Solution Approach 1:
The patent extracts the essential measurement function from complex extensive electrical apparatuses and implements it in a simplified portable device. The frequency response analyzer and impedance converter are designed to perform the critical measurement tasks without requiring the full complexity of traditional measurement systems, thereby reducing device complexity while maintaining measurement precision for frequency-dependent transmission behavior.
Solution Approach 2:
The patent creates a simplified copy of the measurement functionality that replicates the essential measurement capabilities needed for frequency-dependent transmission behavior. The portable device with frequency response analyzer and impedance converter serves as a functional copy that achieves the required measurement precision without the complexity and cost of extensive electrical apparatuses.
2Measurement precision
If reference design measuring up to 9 kHz is used, then measurement precision is improved, but productivity decreases due to extensive equipment requirements
Solution Approach 1:
The patent changes the measurement parameters by implementing a portable device that can measure frequency-dependent transmission behavior across the required frequency range (including up to 9 kHz and beyond) with simplified equipment. The frequency response analyzer and impedance converter are designed to operate efficiently across these parameters, maintaining measurement precision while significantly improving testing productivity and enabling on-site measurements.
3Measurement precision
If manufacturer or on-site testing with extensive equipment is performed, then measurement precision is improved, but loss of time increases due to equipment setup and transport
Solution Approach 1:
The patent implements a dynamic, portable measurement system that can be quickly deployed and configured on-site. The frequency response analyzer and impedance converter are designed as mobile equipment that can be rapidly set up and taken down, enabling fast on-site testing without the time loss associated with transporting and setting up extensive fixed measurement equipment. This dynamic approach maintains measurement precision while minimizing time loss.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient and accurate on-site testing of voltage converters, reducing costs and complexity by providing precise frequency-dependent transmission behavior measurements, suitable for both conventional and LPVTs, and facilitating on-site inspections and routine monitoring.
Implementation Method 1
The frequency response analyzer (60) is configured to measure an electrical transfer function over a predefined frequency range
Implementation Method 2
an impedance converter (70), whose output impedance is matched to the input impedance of the response signal input (67) of the frequency response analyzer (60)
Data Source
AI summary
The present invention relates to a device (50) for testing a voltage converter (10, 20), having a frequency response analyzer (60) and an impedance converter (70). The frequency response analyzer (60) is configured to measure an electrical transfer function over a predefined frequency range. The frequency response analyzer (60) has a test signal output (61) for outputting a test signal for the voltage converter (10, 20), a reference signal input (64) for receiving a reference signal which is applied to the voltage converter (10, 20) for the purpose of testing the voltage converter (10, 20), and a response signal input (67) having a predefined input impedance (68) for receiving a response signal from the voltage converter (10, 20). The impedance converter (70) comprises an impedance converter input (71), which has a variable input impedance (72) which can be adjusted to an impedance of the voltage converter (10, 20), and an impedance converter output (75), which is coupled to the response signal input (67) and has an output impedance (74) matched to the input impedance (68) of the response signal input (67).