Transformer-Isolated Pulse Signal Transmission for Low-Cost Driving
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Solution Overview
Problem
Existing signal transmission devices require high-withstand-voltage processes, which are costly and inefficient, especially in applications like vehicle-mounted power supply and motor driving devices.
Innovation Solution
A signal transmission device using a transformer chip that isolates between input and output circuits using spiral coils, allowing for common low-to-middle-withstand-voltage processes, reducing manufacturing costs and enhancing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-withstand-voltage processes are used to ensure signal transmission isolation, then reliability is improved, but manufacturing cost increases and productivity decreases
Solution Approach 1:
The patent replaces traditional mechanical/electrical isolation methods (requiring high-withstand-voltage processes) with magnetic field-based isolation using transformers. The primary and secondary circuits are isolated through magnetic coupling between coils, eliminating the need for complex high-voltage process manufacturing while maintaining reliable signal transmission isolation.
Solution Approach 2:
The patent introduces a transformer as an intermediary device between the primary and secondary circuits. The transformer chip with primary and secondary coils acts as a mediator that transfers signals through magnetic field coupling, providing effective isolation without requiring high-withstand-voltage processes in the manufacturing of connected components.
2Reliability
If high-withstand-voltage processes are used to ensure signal transmission isolation, then reliability is improved, but productivity decreases
Solution Approach 1:
The patent replaces time-consuming high-withstand-voltage manufacturing processes with transformer-based magnetic isolation. This substitution allows standard low-to-middle-withstand-voltage processes to be used, significantly improving manufacturing efficiency and productivity while maintaining the required signal transmission isolation through the transformer chip.
3Ease of manufacture
If transformer chip with spiral coils is used for isolation, then manufacturing cost is reduced, but device complexity may increase
Solution Approach 1:
The patent merges the isolation function directly into the transformer chip structure itself. The primary and secondary coils are integrated on a single chip substrate with spiral patterns, combining multiple functions (signal transformation and isolation) into one compact device. This integration reduces the need for separate isolation components and simplifies the overall device structure despite the sophisticated coil patterns.
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 device achieves cost-effective signal transmission with reduced manufacturing costs and improved efficiency by eliminating the need for high-withstand-voltage processes, suitable for vehicle-mounted applications.
Implementation Method 1
a first transformer 21A and a second transformer 21B, each including a primary coil and a secondary coil
Data Source
AI summary
A signal transmission device for transmitting a pulse signal to drive a switching element includes: a first external terminal configured to receive a first input pulse signal for ordinary driving; a second external terminal configured to receive a second input pulse signal for forcible driving; and a first logic configured to generate a driving pulse signal according to the first and second input pulse signals. The first logic gives priority to the second input pulse signal over the first input pulse signal.