EV Charger Noise Control via Dynamic DC Current Adjustment
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Solution Overview
Problem
Electrical vehicle charging systems emit noise, which is particularly disturbing in domestic settings, prohibiting their installation due to noise sensitivity.
Innovation Solution
An electrical vehicle charging system that controls the delivery of DC current based on emitted noise levels, using a control device to adjust the charging level in accordance with noise emissions from the air conditioning and electrical components, ensuring stable operation and reducing noise to acceptable limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the charging system operates at high power to charge the electrical vehicle quickly, then the productivity is improved, but the noise emission increases making it unsuitable for domestic settings
Solution Approach 1:
The charging system dynamically adjusts the DC current delivery based on noise level detection. The control device modulates the charging power in real-time according to the measured noise, enabling the system to operate at high power when noise permits and reduce power when noise limits are approached, thus resolving the contradiction between charging speed and noise emission.
Solution Approach 2:
The system incorporates a feedback mechanism where the noise detection device continuously monitors noise levels and provides information to the control device. This feedback loop enables the charging system to automatically adjust its operation to maintain noise within acceptable limits while maximizing charging efficiency when conditions allow.
2Reliability
If the air conditioning device operates at high capacity to cool electrical components, then the reliability is improved, but the noise emission increases which is disturbing in domestic settings
Solution Approach 1:
The air conditioning device operates dynamically with variable cooling capacity based on real-time noise detection. When noise levels approach predefined limits, the control device reduces the cooling capacity proportionally, allowing the system to maintain adequate component cooling while keeping noise within acceptable domestic limits.
Solution Approach 2:
The system changes the operational parameters of the air conditioning device based on noise conditions. The control device adjusts cooling parameters such as fan speed and compressor capacity in response to detected noise levels, enabling the system to adapt cooling performance to environmental constraints while maintaining reliability.
3Ease of operation
If the charging system is designed for quiet operation in domestic settings, then the ease of operation is improved, but the productivity decreases due to reduced charging speed
Solution Approach 1:
The charging system provides dynamic charging speed adjustment based on noise conditions. During periods when noise limits are not approached, the system operates at full charging capacity. When noise detection indicates proximity to limits, the system smoothly transitions to reduced power operation, ensuring both quiet operation when needed and high-speed charging when acceptable.
4Object-generated harmful factors
If the control device reduces DC current to limit noise, then the noise emission is reduced, but the charging duration increases which affects productivity
Solution Approach 1:
The control device implements periodic noise monitoring and adjusts DC current delivery in response to detected noise patterns. Rather than maintaining constantly reduced power, the system alternates between higher and lower power levels based on real-time noise conditions, enabling faster overall charging while respecting noise limits during sensitive periods.
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 the installation of charging systems in noise-sensitive environments by proportionally reducing the DC current based on noise levels, maintaining system stability and minimizing noise emissions below predefined limits, thus accommodating domestic settings.
Implementation Method 1
an air conditioning device (9) configured for cooling and/or heating electrical components of the electrical vehicle charging system
Implementation Method 2
an air conditioning device (9) configured for cooling and/or heating electrical components of the electrical vehicle charging system
Implementation Method 3
the electrical components itself often emit a noise, for example resulting from magnetostriction of the transformer or from the converter
Data Source
AI summary
The application relates to an electrical vehicle charging system for charging an electrical vehicle with a DC current, including a charger, an air conditioning device and a control device, whereby the charger is configured for delivering the DC current to the electrical vehicle, the air conditioning device is configured for heating and/or cooling the charging system, the air conditioning device and/or the charger emits a noise, and the control device is configured for controlling delivery of the DC current according to the noise.