D-Q domain impedance analyzer for multi-phase power systems
This technology provides a way to precisely measure the electrical impedance of each phase in a multi-phase power system — think of it like taking a detailed health reading of how power flows between connected equipment. It injects small test signals (perturbations) at controlled angles into each phase, measures how the system responds in terms of voltage and current, and uses that data to calculate impedance across a range of frequencies. The result is a transfer function that reveals whether the power source and load connected at any interface are electrically stable together. This is especially useful for complex systems like grid-tied inverters, motor drives, or shipboard power networks where instability can cause failures or inefficiencies.
What you could build
A hardware-software impedance analyzer instrument or embedded controller module for power electronics engineers and system integrators testing grid-tied inverters, motor drives, or military/naval power systems; buyers would include power electronics OEMs, defense contractors, and utility-scale energy system integrators.
Who in Virginia should care
Defense contractors and naval systems integrators in the Hampton Roads and Northern Virginia corridors working on shipboard or ground-vehicle power systems would have direct use for this stability-testing capability.
Readiness: Prototype likely
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
- Gerald FRANCIS, Rolando BURGOS, Dushan BOROYEVICH, Fred WANG, Zhiyu SHEN, Paolo MATTAVELLI, Kamiar KARIMI, Sheau-Wei Johnny FU
- Granted
- September 22, 2015
- Status
- Granted patent
- Patent number
- 9140731
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.