Insulating Transformer Layout for Isolated Gate Signal Transfer
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Solution Overview
Problem
Existing insulated gate drivers face challenges in efficiently transmitting control signals across different voltage levels while maintaining insulation and preventing direct current voltage leakage between high and low-voltage circuits.
Innovation Solution
The gate driver employs transformers and capacitors to insulate and transmit signals between low-voltage and high-voltage circuits, using magnetically coupled coils and capacitors to facilitate signal transfer while maintaining insulation, with a configuration suitable for high-voltage applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If transformers are used to transmit control signals across different voltage levels, then signal transmission capability is improved, but device complexity increases
Solution Approach 1:
The patent combines the primary coil and secondary coil into a single transformer component that provides both voltage level transformation and galvanic isolation. This merging of functions into one integrated component achieves signal transmission across different voltage levels while minimizing the increase in device complexity compared to using separate isolation and transformation components.
Solution Approach 2:
The transformer acts as an intermediary component between the low-voltage control circuit and the high-voltage power circuit. It mediates the signal transmission by providing galvanic isolation through magnetic coupling, allowing control signals to pass while preventing direct current voltage leakage and protecting the control circuit from high voltage.
2Reliability
If insulation is maintained between high and low-voltage circuits, then safety and reliability are improved, but signal transmission efficiency deteriorates
Solution Approach 1:
The patent replaces direct electrical connection (mechanical/electrical contact) with magnetic field coupling for signal transmission. The transformer uses electromagnetic induction to transfer signals between isolated circuits, maintaining reliable insulation while efficiently transmitting control signals through the magnetic field without direct electrical contact.
3Object-affected harmful factors
If direct current voltage leakage is prevented, then circuit safety is improved, but control signal transmission is hindered
Solution Approach 1:
The transformer inherently blocks direct current (DC) voltage leakage while allowing alternating current (AC) control signals to pass through. The magnetic coupling mechanism responds to periodic changes in the control signal, enabling efficient transmission of time-varying control signals while preventing steady-state DC voltage leakage between isolated circuits.
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 configuration effectively transmits control signals across varying voltage levels, ensuring insulation and preventing direct current voltage leakage, thereby enhancing the reliability and efficiency of the gate driver.
Implementation Method 1
The transformer includes a first coil at the primary side and a second coil at the secondary side
Data Source
AI summary
An insulating transformer comprising: an insulation layer; a transformer including a first coil embedded in the insulation layer and a second coil; and a capacitor including a first capacitor electrode and a second capacitor electrode, the first capacitor electrode being arranged between the first coil and the second coil and connected to a first ground terminal, and the second capacitor electrode being arranged between the first capacitor electrode and the second coil and connected to a second ground terminal.