Induction Heating Power Switching for Flexible Resonant Circuits
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Solution Overview
Problem
Existing induction heating devices for metallic materials in production lines require full investment in power supply components for each resonant circuit, leading to high costs and limited flexibility in adapting to varying temperature requirements and product changes.
Innovation Solution
A power supply system with a disconnect switch, multiple inverters, and a switching device allows for indirect or direct energy coupling to fewer resonant circuits than the total number available, enabling alternation and intermittent operation of resonant circuits, reducing the need for duplicate power supply components and enhancing flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If full power supply components are provided for each resonant circuit, then reliability is improved, but investment costs increase
Solution Approach 1:
The patent implements a universal power supply system where a single power supply unit with multiple inverters can serve multiple resonant circuits. The power supply device is designed to be multi-functional, capable of distributing energy to different resonant circuits through a switching device that routes power dynamically. This eliminates the need for dedicated power supply components for each resonant circuit while maintaining system reliability.
Solution Approach 2:
The patent combines multiple power supply functions into a single integrated power supply unit. Instead of having separate power supply components for each resonant circuit, the invention merges them into one shared power supply system with multiple inverters and a common DC link, reducing overall component count and investment costs while maintaining the ability to independently control each resonant circuit.
2Productivity
If multiple resonant circuits are operated simultaneously, then productivity is improved, but energy consumption increases
Solution Approach 1:
The patent implements dynamic power distribution through a switching device that can reallocate power supply capacity in real-time. The system dynamically adjusts which resonant circuits receive power based on instantaneous demand, allowing multiple circuits to be operated simultaneously when needed while optimizing energy consumption by activating only the necessary number of circuits rather than maintaining all circuits in a constant ready state.
Solution Approach 2:
The system enables periodic operation of resonant circuits where power is distributed in cycles or batches rather than continuously to all circuits simultaneously. The switching device can activate groups of inverters and resonant circuits in periodic sequences, maintaining productivity through continuous processing while managing peak energy consumption by staggering the operation of multiple circuits.
3Adaptability or versatility
If dedicated power supply components are allocated to each resonant circuit, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent segments the power supply system into modular inverters that can be independently controlled and switched. Each inverter can be individually activated or deactivated through the switching device, providing fine-grained control over power distribution to different resonant circuits. This segmentation enables flexible adaptation to varying temperature requirements without requiring a completely separate dedicated power supply for each circuit.
Solution Approach 2:
The universal power supply unit with multiple inverters and a switching device provides multi-functional capability that can adapt to different operating scenarios. The same power supply infrastructure can serve different numbers and combinations of resonant circuits based on the specific temperature requirements and production needs, achieving adaptability through software/control logic rather than through duplicated hardware components.
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 approach reduces investment costs, improves production line flexibility, enhances energy efficiency, and shortens changeover times by allowing selective operation of resonant circuits based on product needs, while maintaining efficient power distribution.
Implementation Method 1
at least one inverter, in particular two, three, four, five, six or more inverters, for converting a direct current into an alternating current for supplying energy to a resonant circuit
Implementation Method 2
resonant circuits, in particular three, four, five, six or more resonant circuits, for generating a magnetic field for heating the metallic material
Implementation Method 3
If the metallic object is in contact with this alternating magnetic field, the field induces an electrical voltage in the object, resulting in an electric current, particularly an alternating current. This current always flows in closed paths, can therefore also be called an eddy current, and, according to Joule losses, causes the metallic object to heat up.
Implementation Method 4
This current always flows in closed paths, can therefore also be called an eddy current, and, according to Joule losses, causes the metallic object to heat up.
Data Source
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AI summary
The invention relates to an induction heating device for heating a metallic material, said induction heating device comprising: a number of at least two resonant circuits each for generating a magnetic field for heating the metallic material; and a power supply device for supplying the resonant circuits with electrical power, the power supply device comprising an isolator switch for connecting the induction heating device to an electrical power supply, and at least one inverter for converting a direct current into an alternating current for supplying power to a resonant circuit, the power supply device comprising a switching device, the switching device being designed to enable at least indirect energy coupling between the isolator switch and the resonant circuits, and the number of resonant circuits capable of being simultaneously coupled with energy being smaller than the number of resonant circuits in the induction heating device.