Asymmetric interleaving controller IP for compact EMI filter
This technology is a smarter way to coordinate the switching timing in multi-channel power supplies that correct power factor — a common function in everything from server power supplies to EV chargers. By deliberately using uneven (asymmetrical) timing gaps between channels, rather than evenly spacing them, the design causes certain electrical noise frequencies to cancel each other out more effectively. The practical payoff is that the electromagnetic interference (EMI) filter required by regulations can be made smaller and cheaper, because it no longer needs to suppress as wide a range of noise. The system can also adapt its channel count and timing on the fly to stay efficient at lower power loads.
What you could build
A firmware or controller IP block for multi-phase power factor correction stages, licensable to power supply IC designers and OEMs building server PSUs, industrial power supplies, or EV charging equipment who need to shrink EMI filter bill-of-materials cost.
Who in Virginia should care
Defense contractors and data center operators in Northern Virginia with high-density power supply procurement needs, as well as power electronics firms in the broader Mid-Atlantic region.
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
- Chuanyun Wang, Ming Xu, Fred C. Lee
- Granted
- June 29, 2010
- Status
- Granted patent
- Patent number
- 7746675
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.