Common Mode Noise Simulator With Impedance Filtering
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Solution Overview
Problem
Existing common mode noise simulators fail to effectively remove high-frequency components and control amplitude modulation in energy storage systems, which affects the insulation performance evaluation of batteries, leading to communication failures and malfunctions.
Innovation Solution
A common mode noise simulator is designed with a high-frequency removing unit using inductors and capacitors to remove high-frequency components and an amplitude modulating unit using resistors to control noise amplitude, coupled with an insulation evaluating unit that assesses battery insulation based on leakage current waveform information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If common mode noise is applied to evaluate battery insulation performance, then insulation evaluation capability is improved, but high-frequency components cause measurement inaccuracies and communication failures
Solution Approach 1:
The patent introduces an intermediary circuit comprising inductors and capacitors between the common mode noise source and the battery under test. The inductors (L1, L2) and capacitors (C1, C2) form a filtering network that mediates the noise signal, allowing controlled frequency components to pass while attenuating harmful high-frequency components. This intermediary structure enables precise insulation measurement without the adverse effects of unfiltered high-frequency noise.
2Adaptability or versatility
If amplitude modulation is applied to common mode noise, then noise control capability is improved, but without proper impedance control, amplitude modulation effectiveness deteriorates
Solution Approach 1:
The patent employs parameter changes by controlling the impedance values of inductors and capacitors in the filtering circuit. By adjusting the inductance (L) and capacitance (C) parameters, the circuit's frequency response and amplitude modulation characteristics are optimized. This parameter control ensures reliable amplitude modulation of the common mode noise signal, enabling versatile noise control for different test conditions while maintaining measurement reliability.
3Productivity
If high-frequency components are present in common mode noise, then noise simulation capability is improved, but communication failures and malfunctions increase
Solution Approach 1:
The patent applies local quality by creating different frequency attenuation characteristics at different stages of the noise injection circuit. The inductors and capacitors are strategically positioned to provide localized filtering effects: L1 and C1 filter noise on the positive terminal side, while L2 and C2 filter on the negative terminal side. This localized quality control allows the system to maintain effective noise simulation for insulation testing while preventing high-frequency components from causing system-wide communication failures.
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
The simulator effectively evaluates battery insulation performance by removing high-frequency components and modulating noise amplitude, reducing communication failures and malfunctions, thereby enhancing power efficiency and management in energy storage systems.
Implementation Method 1
removes a high-frequency component by controlling impedance of an inductor, a capacitor, and a resistor
Implementation Method 2
controlling impedance of an inductor, a capacitor, and a resistor
Implementation Method 3
controlling impedance of an inductor, a capacitor, and a resistor
Implementation Method 4
controlling impedance of an inductor, a capacitor, and a resistor
Implementation Method 5
evaluates insulation performance of a battery by measuring leakage current of the battery
Data Source
AI summary
The present invention relates to a common mode noise simulator, and more particularly, to a common mode noise simulator which removes a high-frequency component by controlling impedance of an inductor, a capacitor, and a resistor and evaluates insulation performance of a battery by measuring leakage current of the battery depending on amplitude-modulated common mode noise.