Voltage Converter Modulated Feedback Signal Transmission
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Solution Overview
Problem
Existing switched mode voltage converters face challenges in transmitting additional information from the secondary side to the primary side across a potential barrier, often requiring costly opto-couplers or other signal transmission circuits.
Innovation Solution
A voltage converter design that includes a secondary side control circuit generating an error signal and modulating it with supplemental information to create a feedback signal, which is then transmitted to the primary side circuit via a transformer, allowing for the conveyance of both error and supplemental data using a single transmission circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If opto-couplers are used to transmit feedback signal across potential barrier, then signal transmission reliability is improved, but device cost and complexity increase
Solution Approach 1:
The patent combines the feedback signal transmission function with the existing transformer coupling structure. The secondary side control circuit modulates the error signal and transmits it through the transformer's magnetic coupling to the primary side, eliminating the need for separate opto-coupler circuits while maintaining reliable signal transmission across the potential barrier.
Solution Approach 2:
The transformer is made multi-functional by using it not only for power transfer but also for feedback signal transmission. The same magnetic coupling that transfers power from primary to secondary winding is utilized to transmit the modulated feedback signal from secondary to primary side, reducing overall device complexity.
2Measurement precision
If separate transmission circuits are used for feedback signal, then signal transmission accuracy is improved, but loss of substance and cost increase
Solution Approach 1:
The patent merges the feedback signal transmission path with the power transfer path by utilizing the transformer's magnetic coupling for both purposes. This eliminates the need for separate transmission circuits and reduces component material usage while maintaining signal accuracy through proper modulation and detection circuits.
3Adaptability or versatility
If additional information is transmitted from secondary to primary side, then system adaptability is improved, but device complexity increases
Solution Approach 1:
The transformer coupling is used for multiple functions: power transfer, feedback signal transmission, and additional information transmission. The secondary side control circuit modulates supplementary information onto the feedback signal, which is then transmitted through the same magnetic coupling path to the primary side, enhancing system adaptability without requiring additional transmission 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 approach reduces costs by using a single transmission circuit while effectively transmitting both error and supplemental information across the potential barrier, enhancing the efficiency of voltage converter operations.
Implementation Method 1
a transformer with a primary winding and a secondary winding... an input voltage and input current is received by a primary side circuit connected to a primary winding of the transformer, and an output signal (an output voltage or an output current) is output by a circuit connected to a secondary side of the transformer
Data Source
AI summary
Disclosed is a voltage converter and a method. The voltage converter includes: an input, an output, and a transformer including a primary winding and a secondary winding; a primary side circuit comprising at least one switch and coupled between the input and the primary winding; a secondary side control circuit coupled to the output. The primary side circuit is configured to receive a feedback signal from the secondary side control circuit. The secondary side control circuit is configured to generate an error signal based on an output signal of the voltage converter, and to modulate the error signal based on supplemental information to generate the feedback signal.