Switching AC/DC Power Supply with 10 MHz Time Base Synchronization
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Solution Overview
Problem
Multiple AC/DC power supplies connected in parallel often lack synchronized time bases, leading to frequency errors, electromagnetic interference, and increased ripple rates, which are not effectively addressed by existing technologies.
Innovation Solution
A switching AC/DC power supply system with a 10 MHz time base, comprising a master unit and slave units connected via cables, where the master's time base generator synchronizes with the slave units' time base processing circuits through selector switches, ensuring a synchronized time base and reduced output ripple and EMI noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple AC/DC power supplies are connected in parallel without synchronized time bases, then the power supply capacity is increased, but frequency errors and electromagnetic interference occur
Solution Approach 1:
The patent merges multiple power supply units into a coordinated system by connecting their time base generators through a synchronization network. This allows the units to operate in parallel while maintaining synchronized switching frequencies and phases, thereby increasing total power capacity without generating electromagnetic interference or frequency errors.
2Quantity of substance
If multiple AC/DC power supplies are connected in parallel without synchronized time bases, then the power supply capacity is increased, but output ripple rate increases
Solution Approach 1:
The synchronization network combines the time base signals of parallel power supplies to ensure they switch in coordinated phases. This merging of timing references prevents constructive interference of ripple waves, allowing the system to deliver increased power capacity while maintaining low output ripple levels.
3Reliability
If synchronized time bases are implemented in multiple AC/DC power supplies, then frequency errors and electromagnetic interference are reduced, but system complexity increases
Solution Approach 1:
The patent introduces a time base processing circuit as an intermediary component that receives the time base generator signal and conditions it for distribution to multiple power supply units. This intermediary handles the synchronization function centrally, reducing the complexity burden on each individual unit while ensuring reliable frequency accuracy and electromagnetic interference reduction across the entire parallel system.
Data Source
AI summary
A switching AC/DC power supply system with a 10 MHz time base includes a master and at least one slave, each of which has a time base generator, and the time base generators can provide a time base of 10 MHz. Wherein the slave has a selector switch, and when the master is coupled to the slave, the slave can obtain the time base from the time base generator of the master through the selector switch, thereby enabling the time base of the slave is fully synchronized with the master and improving the power output quality of the switching AC/DC power supply system.