Isolation Transformer Power Data Transmission
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Solution Overview
Problem
Existing galvanically isolated transformer-based systems face challenges in dynamically changing the power transfer level without interrupting data communication, limiting their versatility in applications like gate drivers and medical devices.
Innovation Solution
The system employs two coupled RF oscillators and a single isolation transformer to enable simultaneous uni-directional and bi-directional data communication and variable power transfer by modulating signals using PWM control, allowing for efficient power management and data transmission across the isolation barrier.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a single isolation transformer is used for both power transfer and data communication, then area is saved, but data communication must be interrupted when power level changes
Solution Approach 1:
The patent segments the transformer windings into multiple independent channels (primary side windings and secondary side windings) that can operate independently. This allows one channel to carry power transfer while another channel carries data communication, enabling simultaneous operation without interruption and resolving the contradiction between area saving and communication continuity.
Solution Approach 2:
The patent makes the single isolation transformer multi-functional by enabling it to simultaneously perform power transfer and data communication through its multiple winding channels. Each channel can be independently configured for different functions, allowing the transformer to serve multiple purposes at once without requiring separate components.
2Productivity
If separate transformers are used for data communication and power transfer, then data communication continuity is maintained, but device area increases
Solution Approach 1:
The patent merges the functions of separate data communication transformer and power transfer transformer into a single isolation transformer. By combining multiple winding channels within one transformer core, it achieves the functionality of multiple separate transformers while reducing the overall device area and component count.
3Adaptability or versatility
If power transfer level is changed using on-off switching, then power control is achieved, but data communication is interrupted
Solution Approach 1:
The patent segments the power control function from the data communication function by assigning them to different winding channels. Power level changes can be implemented in one channel without affecting the other channel's data communication, allowing continuous operation of both functions simultaneously.
Solution Approach 2:
The patent uses periodic PWM control signals to modulate the power transfer channel while maintaining continuous operation. This periodic modulation allows variable power levels to be achieved through pulse-width modulation rather than simple on-off switching, preventing communication interruptions.
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 allows for area-saving designs with integrated data and power channels, enabling variable power levels and efficient data communication without interrupting power transfer, suitable for applications like gate drivers and medical devices.
Implementation Method 1
Transformer-based systems may be used to provide data communication and/or power transfer across a galvanic isolation barrier
Implementation Method 2
The system employs two coupled RF oscillators and a single isolation transformer to enable simultaneous uni-directional and bi-directional data communication and variable power transfer by modulating signals using PWM control
Data Source
AI summary
Power and data are transmitted via a transformer including primary side and secondary side. A primary side signal is generated by coupling a first oscillator signal modulated with a data signal with a second oscillator signal that is selectively switched on and off. At the secondary side a secondary signal is generated. A demodulator demodulates the secondary signal to recover the data signal. A rectifier processes the secondary signal to recover a power supply signal controlled by switching on and off the second oscillator.