Split-Core Magnetic Charging for Corrosion-Free Boat Power Transfer
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Solution Overview
Problem
Existing charging methods for electric boats in high-humidity and saline environments are susceptible to corrosion, electric shock, and short-circuit faults due to exposure of electrical conductors, lacking a safe and durable power transmission solution.
Innovation Solution
A magnetically coupled charging system using a split core transformer with sealed primary and secondary windings, a resonant inverter, and a rectifier assembly, providing galvanic isolation and eliminating direct conductor exposure through magnetic field power transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional electrical conductors are used for charging electric boats in high-humidity and saline environments, then power transmission can be achieved, but the conductors are susceptible to corrosion, electric shock, and short-circuit faults
Solution Approach 1:
The patent introduces magnetic fields as an intermediary medium to transfer power from the onshore charging system to the onboard charger without direct electrical contact. The split core transformer with primary and secondary windings creates a magnetic coupling that transmits energy while isolating the conductive paths, thereby eliminating the harmful effects of corrosion and electric shock on exposed conductors in marine environments.
Solution Approach 2:
The patent replaces the traditional mechanical electrical connection system with a magnetic field-based power transmission system. Instead of using direct electrical conductors that are vulnerable to environmental damage, the system uses electromagnetic induction through the split core transformer to transfer power, substituting a vulnerable mechanical/electrical system with a more robust electromagnetic field-based system.
2Ease of manufacture
If direct electrical connection is used for charging, then power transmission is simple, but the connection point is exposed to corrosion and short-circuit faults
Solution Approach 1:
The magnetic field serves as an intermediary that enables power transmission without direct electrical contact between the onshore charging system and the onboard charger. The split core transformer with its primary and secondary windings creates this magnetic coupling, allowing energy transfer while maintaining galvanic isolation and protecting against environmental corrosion.
Solution Approach 2:
The charging system is segmented into two electrically isolated parts: the onshore charging system with the resonant inverter and primary winding, and the onboard charger with the rectifier assembly and secondary winding. This segmentation allows each part to be optimized independently while maintaining overall system reliability through magnetic coupling.
3Reliability
If magnetic coupling is used for power transmission, then galvanic isolation and corrosion protection are achieved, but the system complexity increases
Solution Approach 1:
The patent applies magnetic coupling specifically at the critical interface between the onshore charging system and the onboard charger, where corrosion and electric shock risks are highest. The split core transformer with primary and secondary windings provides localized galvanic isolation at this vulnerable point, while other parts of the system can maintain simpler designs.
Solution Approach 2:
The split core transformer with primary and secondary windings serves multiple functions: it provides galvanic isolation, enables magnetic coupling for power transmission, and protects against corrosion and electric shock. This multi-functional component reduces the need for additional separate protection devices, thereby limiting the increase in overall system complexity.
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 ensures safe and durable power transmission by preventing electric shock and short circuits, while maintaining stability in harsh environments, with improved connector durability and precise battery charging control.
Implementation Method 1
a resonant inverter and a split core transformer configured to receive a resonant power from the resonant inverter
Implementation Method 2
The split core transformer includes a primary winding and a secondary winding. The primary winding and the secondary winding are split from each other
Implementation Method 3
a rectifier assembly configured to receive a transformed resonant power from the split core transformer and transmit the transformed resonant power to a to-be-charged battery
Data Source
AI summary
The invention relates to a magnetically coupled charging system and method. The magnetically coupled charging system comprises: a resonant inverter; a split core transformer configured to receive a resonant power from the resonant inverter; and a rectifier assembly configured to receive a transformed resonant power from the split core transformer and transmit the transformed resonant power to a to-be-charged battery; the split core transformer comprising a primary winding and a secondary winding, wherein the primary and secondary windings are split from each other, the resonant inverter and the primary winding of the split core transformer are arranged in an onshore charging system, the rectifier assembly and the secondary winding of the split core transformer are arranged in an onboard charger. The invention has the following advantages of: eliminating the risk of electric shock and short circuit fault at a connection point and eliminating an arcing or sparking problem.