Isolation Transformer Coil Layout for Gate Driver Signal Insulation
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Solution Overview
Problem
Existing gate drivers face challenges in efficiently transmitting control signals across different voltage levels while maintaining insulation and preventing direct current voltage transmission between low-voltage and high-voltage circuits.
Innovation Solution
A gate driver configuration utilizing transformers to insulate low-voltage and high-voltage circuits, allowing signal transmission while preventing direct current voltage leakage, with a transformer chip acting as an isolation module to facilitate signal exchange between the circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a transformer is used to insulate low-voltage and high-voltage circuits, then signal transmission is enabled while preventing direct current voltage leakage, but device complexity increases
Solution Approach 1:
The patent introduces a transformer as an intermediary device between low-voltage and high-voltage circuits. The transformer enables control signal transmission while blocking direct current voltage leakage through its galvanic isolation property. This mediator approach resolves the contradiction by providing reliable insulation without requiring complex circuit designs.
Solution Approach 2:
The patent divides the gate driver into separate low-voltage and high-voltage circuit sections, with the transformer acting as the boundary. This segmentation allows each section to operate independently at its appropriate voltage level, improving insulation reliability while keeping the overall structure manageable through modular design.
2Ease of operation
If a transformer chip is used as an isolation module, then signal exchange between circuits is facilitated, but manufacturing precision requirements increase
Solution Approach 1:
The patent integrates the transformer into a compact transformer chip that combines primary and secondary coils in a single packaged component. This merging of functions into one module facilitates easy signal exchange between circuits while managing manufacturing precision requirements through standardized chip production processes.
3Reliability
If insulation is maintained between voltage levels, then safety is improved, but energy loss increases
Solution Approach 1:
The transformer serves as an efficient intermediary that transfers energy magnetically between primary and secondary coils. This magnetic coupling provides strong insulation for electrical safety while maintaining high energy transfer efficiency, minimizing signal transmission loss compared to other isolation methods.
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 solution ensures reliable and efficient transmission of control signals across varying voltage levels, maintaining insulation and preventing direct current voltage leakage, thereby enhancing the performance and safety of inverter devices in electric vehicles.
Implementation Method 1
a transformer configured to transmit the control signal from the low-voltage circuit to the high-voltage circuit
Data Source
AI summary
An isolation transformer includes an insulation layer and a transformer. The transformer includes a first coil and a second coil embedded in the insulation layer. The first coil and the second coil are opposed to each other in a thickness-wise direction of the insulation layer. The first coil and the second coil include non-overlapping portions that do not overlap each other in the thickness-wise direction of the insulation layer.