Magnetic Induction Power Supply Inrush Voltage Protection
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Solution Overview
Problem
Conventional magnetic induction power supply devices face inefficiencies in power production due to low power output per current transformer, increased installation and maintenance costs, and vulnerability to inrush voltage, especially when dealing with low currents or initial operation.
Innovation Solution
A magnetic induction power supply device with multiple coils of varying windings connected in series to a rectification unit, controlled by a sensing and switching unit to regulate power induction and manage inrush voltage, utilizing an emergency power supply for initial operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple current transformers are used to increase power output, then the power production capability is improved, but the number of converters and mounting parts increases, leading to higher installation and maintenance costs
Solution Approach 1:
The patent combines multiple current transformers into a single integrated device with a common core structure. Multiple secondary coils are wound on the same core, allowing them to share mounting hardware and control circuitry, thereby reducing the overall number of mounting parts and converters while maintaining enhanced power production capability
2Ease of operation
If a converter is installed for each current transformer to convert AC to DC, then the power conversion function is improved, but the installation cost and maintenance cost increase
Solution Approach 1:
The patent implements a universal converter design where a single DC output terminal serves multiple secondary coils simultaneously. This multi-functional converter can handle power from any or all of the multiple current transformers, eliminating the need for separate dedicated converters for each transformer and thereby reducing both installation and maintenance costs
3Speed
If full voltage is applied at initial operation, then the power supply response is improved, but parts are damaged by inrush voltage
Solution Approach 1:
The patent incorporates a control unit that activates before full power operation, performing preliminary voltage regulation and monitoring functions. This preliminary action detects and mitigates inrush voltage conditions before they can damage components, while still enabling rapid power supply response by having the system ready to operate at full capacity once conditions are safe
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 device efficiently produces power within required ranges by adjusting coil connections based on induced voltage, reduces complexity and cost, stabilizes input voltage, and prevents damage from inrush voltages, enhancing power acquisition efficiency and maintenance capabilities.
Implementation Method 1
a current transformer (110) installed at a power line (200) to induce a voltage, and having a plurality of unit coils (114)
Data Source
AI summary
Disclosed is a magnetic induction power supply device, which switches the unit coil having the smallest number of windings to a rectification unit at the initial operation, thereby preventing the parts damaged due to an excessive inrush voltage. The disclosed magnetic induction power supply device switches the unit coil having the smallest number of windings to the rectification unit when emergency power is applied from a first power supply unit or a second power supply unit. The second power supply unit can supply the power source induced in the unit coils to a sensing unit as the emergency power.