Contactless Energy Transmission System Efficiency Optimization
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Solution Overview
Problem
Inductive charging systems for electric vehicles lack optimization to maintain maximum efficiency, particularly when components from different manufacturers are used, leading to suboptimal energy transmission.
Innovation Solution
A transmission system with a primary and secondary portion, including rectifiers, inverters, coils, and impedance transformers, controlled by a unit that modifies parameters to maximize efficiency by iteratively determining the most efficient parameters and adjusting them to achieve optimal energy transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If inductive charging systems use components from different manufacturers, then system compatibility and versatility are improved, but transmission efficiency deteriorates due to lack of optimization
Solution Approach 1:
The control unit continuously monitors transmission efficiency and iteratively adjusts parameters of the primary and secondary portions to maximize efficiency. This feedback mechanism enables optimization of mixed manufacturer components by dynamically adapting operating parameters based on actual performance measurements.
Solution Approach 2:
The system dynamically modifies parameters such as switching frequencies, voltage levels, and current characteristics during operation. This dynamic adjustment allows the system to adapt to different component combinations and maintain optimal efficiency despite variations in manufacturer specifications.
2Ease of operation
If inductive charging systems transmit energy over larger air gaps, then ease of operation and user convenience are improved, but energy transmission efficiency deteriorates
Solution Approach 1:
The control unit dynamically adjusts transmission parameters including switching frequency and power level in response to detected air gap variations. When a larger air gap is detected, the system modifies parameters to compensate for increased magnetic coupling losses, thereby maintaining acceptable efficiency while preserving user convenience.
Solution Approach 2:
The system changes operating parameters such as frequency and voltage to optimize performance for different air gap conditions. By iteratively determining the most efficient parameters for each operating condition, the system maintains high efficiency even when physical alignment varies.
3Device complexity
If inductive charging systems use fixed parameters, then device complexity is reduced, but transmission efficiency deteriorates due to inability to optimize
Solution Approach 1:
The control unit automatically performs iterative parameter optimization without external intervention. The system self-adjusts by monitoring efficiency and modifying parameters autonomously, eliminating the need for complex manual configuration or pre-programming while achieving maximum efficiency.
Solution Approach 2:
The system incorporates continuous efficiency monitoring and automatic parameter adjustment based on feedback signals. This closed-loop control enables the system to maintain optimal efficiency through iterative parameter determination without requiring complex external control infrastructure.
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 system iteratively determines and adjusts parameters to achieve maximum efficiency, ensuring optimal energy transfer and compatibility between components from different manufacturers, enhancing overall efficiency and energy delivery.
Implementation Method 1
the primary coil generates a high-frequency magnetic alternating field which penetrates the secondary coil and induces a corresponding alternating current there
Implementation Method 2
a primary rectifier for converting alternating current from an alternating current source into direct current
Implementation Method 3
a secondary rectifier for converting alternating current from the secondary coil into direct current
Data Source
AI summary
Method for contactlessly transmitting electrical energy to a load (17) using a transmission system (1), having the steps of: converting alternating current from an alternating current source (4) into direct current using a primary rectifier (5), converting the direct current generated by the primary rectifier (5) into alternating current using a primary inverter (7), changing a primary parameter (di) at a component (38) of a primary part (2) of the transmission system, such that the electrical power consumed by a load (17) is changed as a result, contactlessly transmitting the electrical energy of the alternating current generated by the primary inverter (7) from a primary coil (9) to a secondary coil (12), converting the alternating current generated in the secondary coil (12) into direct current using a secondary rectifier (15), changing a secondary parameter at a component (16) of a secondary part (3) of the transmission system (1), such that the electrical power consumed by the load (17) is changed as a result, supplying electrical energy as direct current to the load (17), wherein an A-efficiency of the contactless transmission of energy with respect to a secondary A-parameter is determined, the secondary parameter is then changed from the secondary A-parameter to at least one secondary B-parameter and a B-efficiency is determined for the at least one secondary B-parameter, and that efficiency with the maximum efficiency is selected from the A-efficiency and from the at least one B-efficiency and this selected maximum efficiency is referred to as C-efficiency, and energy is then contactlessly transmitted with a secondary C-parameter assigned to the C-efficiency as an iteration step for determining the secondary C-parameter.