Common-mode noise-suppressed transformer for power converters
This technology addresses a persistent interference problem in transformers, where unwanted electrical noise leaks from one winding to another through parasitic capacitance — tiny, unintended capacitors formed between the transformer's internal shield layers and windings. The method uses one or more conductive shield members placed between the primary and secondary windings, connected in a specific way so that the noise currents they generate cancel each other out. By carefully engineering how voltage distributes across the shields and windings, the net common-mode noise current is driven to near zero. The approach is clever because it doesn't require perfect symmetry on both sides of the shield — a practical advantage in real transformer designs.
What you could build
A transformer design methodology or a line of EMI-suppressed transformers for switching power supplies and power converters, sold to power supply manufacturers, industrial electronics OEMs, and EV charging equipment makers who must meet strict EMC standards.
Who in Virginia should care
Defense electronics and power systems contractors in Northern Virginia (e.g., Leidos, SAIC, DXC) and power conversion companies serving the data center corridor would have direct application needs.
Readiness: Lab validated
Concept — described but not yet demonstrated. Lab validated — supported by experimental results in the patent. Prototype likely — the text describes a built, working embodiment.
Readiness is inferred from the patent text, not from a lab visit.
The record
- Inventors
- Yuchen Yang, Daocheng Huang, Qiang Li, Fred C. Lee
- Granted
- March 7, 2017
- Status
- Granted patent
- Patent number
- 9589718
Ready to talk?
Virginia Tech Intellectual Properties handles licensing for this technology.
Prosim summaries are generated from public patent text and are not legal advice.