Multi-Phase Grid Interface System

Technology #14787

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Professor David Perreault
Department of Computer Science and Electrical Engineering, MIT
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Brandon Pierquet
Department of Computer Science and Electrical Engineering, MIT
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Christopher Noble
MIT Technology Licensing Officer - Clean and Renewable Energy
Patent Protection

Multi-Phase Grid Interface

US Patent 9,401,664
Pushing the Envelope in Power Electronics
ILP Institute Insider, August 4th, 2014


Applications include grid connected electronics, photovoltaic inverter systems, electromechanical motor drives, and telecommunications rectifiers.

Problem Addressed

This technology addresses the energy losses in grid interfaces.


Improving the efficiency in electrical power conversion reduces unneeded power losses. This invention provides a multi-phase power converter architecture with a robust AC interface, enabling an improvement in efficiency over traditional implementations. The design inherently provides the capability for bidirectional and reactive power control capability for each phase independently, or in unison for three-phase systems. These features are useful for providing smart-grid participation and improved reliability in uncertain voltage conditions. Each input / output port (phase) is logically connected in series, and can scale to the required number of input/output connections for applications in motor drives and ac-ac converters.


  • Provides reduced power losses for a power converter with multiple outputs, while improving functionality and reliability for the AC interfaces.