Integrated Transformer and Common Mode Choke for EMI Suppression
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Solution Overview
Problem
The challenge in reducing the footprint of electronic devices while maintaining performance is hindered by the physical space requirements of separate electrical components like transformers and chokes, which are necessary for signal isolation and EMI suppression in modern communication systems.
Innovation Solution
An integrated component that combines a transformer and a common-mode choke using a shared core, which reduces common mode noise and occupies less physical space, achieving similar or improved signal integrity and EMI suppression compared to separate components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate transformers and chokes are used for signal isolation and EMI suppression, then signal integrity and EMI suppression performance are maintained, but the device footprint increases
Solution Approach 1:
The patent combines a transformer and a common-mode choke into a single integrated component that shares a common magnetic core. The transformer primary and secondary windings are wound on the same core structure as the common-mode choke, allowing both functions to coexist in one compact unit. This merging eliminates the need for separate components while maintaining both signal isolation and EMI suppression capabilities.
Solution Approach 2:
The integrated component performs multiple functions simultaneously: the transformer provides galvanic isolation and signal transformation, while the common-mode choke suppresses EMI and noise. The shared magnetic core structure enables both the transformer windings and choke windings to operate together, making the component universal for both isolation and filtering applications in communication interfaces.
2Object-affected harmful factors
If separate transformers and chokes are used for signal isolation and EMI suppression, then EMI suppression performance is maintained, but the device footprint increases
Solution Approach 1:
The patent combines a transformer and a common-mode choke into a single integrated component that shares a common magnetic core. The transformer primary and secondary windings are wound on the same core structure as the common-mode choke, allowing both functions to coexist in one compact unit. This merging eliminates the need for separate components while maintaining both signal isolation and EMI suppression capabilities.
Solution Approach 2:
The integrated component performs multiple functions simultaneously: the transformer provides galvanic isolation and signal transformation, while the common-mode choke suppresses EMI and noise. The shared magnetic core structure enables both the transformer windings and choke windings to operate together, making the component universal for both isolation and filtering applications in communication interfaces.
3Reliability
If separate transformers and chokes are used, then proper signal isolation and filtering are achieved, but material requirements and manufacturing complexity increase
Solution Approach 1:
The patent combines a transformer and a common-mode choke into a single integrated component that shares a common magnetic core. The transformer primary and secondary windings are wound on the same core structure as the common-mode choke, allowing both functions to coexist in one compact unit. This merging eliminates the need for separate components while maintaining both signal isolation and EMI suppression capabilities.
Solution Approach 2:
The integrated component performs multiple functions simultaneously: the transformer provides galvanic isolation and signal transformation, while the common-mode choke suppresses EMI and noise. The shared magnetic core structure enables both the transformer windings and choke windings to operate together, making the component universal for both isolation and filtering applications in communication interfaces.
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 integrated component effectively filters common-mode noise, isolates differential signals, and suppresses EMI, while reducing the overall size and material requirements, offering improved performance and efficiency over conventional separate component configurations.
Implementation Method 1
a primary winding of a transformer that induces a magnetic field on the third core section
Implementation Method 2
a second coil electrically coupled to the third core section, which forms a secondary winding of the transformer that receives electromagnetic energy from the magnetic field induced by the primary winding of the transformer
Implementation Method 3
The choke is configured to reduce common mode noise for an electrical signal received by the electrical device
Data Source
AI summary
An electrical device includes a core structure having a first core section, a second core section, and a third core section. The electrical device further includes a first coil electrically coupled to the first core section and the second core section to form a choke and a primary winding of a transformer. The choke is configured to reduce common mode noise for an electrical signal received by the electrical device, and the primary winding of the transformer is configured to induce a magnetic field on the third core section. The electrical device also includes a second coil electrically coupled to the third core section, which forms a secondary winding of the transformer and receives electromagnetic energy from the magnetic field induced by the primary winding of the transformer.