Bidirectional Non-Contact Power Supply Circuit Topology
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Solution Overview
Problem
Conventional bidirectional non-contact power supply devices face challenges in achieving high electric power transmission efficiency due to the complexity of component connections and the limited functionality of bidirectional buck-boost converters, which result in increased size and reliability issues, as well as suboptimal voltage management during power transmission and reception.
Innovation Solution
A bidirectional non-contact power supply device configuration where a self-coil and capacitor are connected in series with an inverter circuit, and a bidirectional buck-boost converter is connected to both the inverter circuit and a DC power source, allowing for efficient voltage conversion and management during both power transmission and reception, optimizing the device's operation as either a buck or boost converter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple capacitors and switches are used to enable bidirectional power supply operation, then the device can function as both power transmission and reception device, but the device complexity increases and reliability decreases
Solution Approach 1:
The patent applies universality by designing a single non-contact power supply device that can function in both power transmission and power reception modes. The same device structure, including the coil and capacitor configuration, is used for both transmitting and receiving power, eliminating the need for separate specialized devices for each function.
Solution Approach 2:
The patent applies inversion by reversing the operational mode of the device. When power transmission is needed, the device operates as a transmitter; when power reception is needed, the same device operates as a receiver. This is achieved by inverting the phase relationship between the transmitting and receiving coils, allowing the device to bidirectionally perform both functions using the same hardware configuration.
2Adaptability or versatility
If multiple capacitors and switches are used to enable bidirectional power supply operation, then the device can function as both power transmission and reception device, but the device size increases
Solution Approach 1:
The patent applies merging by combining the power transmission and power reception functions into a single integrated device. Instead of using separate devices or multiple capacitors for each function, the invention uses one capacitor that serves both transmission and reception operations, thereby reducing the overall device volume while maintaining bidirectional functionality.
3Device complexity
If bidirectional buck-boost converter is used with limited voltage conversion functionality, then the circuit can be simplified, but the electric power transmission efficiency decreases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the operating parameters of the bidirectional buck-boost converter based on the power transmission conditions. The converter switches between buck mode (when input voltage is higher than output voltage) and boost mode (when input voltage is lower than output voltage), optimizing the voltage conversion efficiency across different operating conditions while maintaining circuit simplification.
4Device complexity
If full-bridge inverter circuit operates as diode bridge during power reception, then the circuit structure can be simplified, but the voltage conversion flexibility is reduced
Solution Approach 1:
The patent applies dynamics by making the full-bridge inverter circuit dynamically reconfigurable. During power reception, the circuit operates as a diode bridge for simple rectification. During power transmission, the circuit dynamically switches to inverter mode with active semiconductor devices controlling the switching, enabling flexible voltage conversion. This dynamic adaptation allows the same circuit structure to provide different levels of functionality based on operational requirements.
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
This configuration enables a high electric power transmission efficiency in bidirectional non-contact power supply systems, reducing the need for multiple capacitors and switches, leading to a more compact and reliable device with improved voltage handling capabilities.
Implementation Method 1
a self coil being coupled with an other coil through a magnetic field coupling therebetween for performing electric power transmission to the other coil or performing electric power reception from the other coil
Data Source
AI summary
A bidirectional non-contact power supply device with its electric power transmission efficiency being high is obtained by a simple configuration. In the bidirectional non-contact power supply device, a coil is included for performing electric power transmission to and reception from another coil through a magnetic field coupling therebetween, and the coil and a capacitor being connected in series are connected on an input-output end of an inverter circuit, wherein a bidirectional buck-boost converter is connected between the inverter circuit and a DC power source (7).