Tunable Switched Impedance Matching Network (TSIMN)

The Need

In the era of electrified vehicles, there is a growing demand for efficient power systems that can provide high voltage and/or high output power to meet strict design requirements. These power systems also need to supply power to other equipment and circuits, such as DC-DC converters, on-board generatosr, and air conditioning systems.

The Technology

A research team at The Ohio State University, led by Dr. Jin Wang, has created new tunable swtiched impedance matching network (TSIMN) power system. In a wireless power transfer (WPT) system, alignment between the vehicle-coil and ground-coil is not always guaranteed. By controlling driving point impedance, couplers' energies can be minimized according to their associated losses while achieving perfect matching condition. ThThis configuration allows alternating current input to the rectifier to result in alternating voltage with parabolic approaches to maximum magnitude values. These maximum magnitude values correspond to the magnitude of voltage output to the battery.

Commercial Applications

  • Electrified Vehicles: This technology can be used in hybrid, plug-in hybrid, and electric vehicles to provide electricity to the electric machines.
  • On-board Systems: The power system can supply power to other equipment and circuits in the vehicle, such as the DC-DC converter, on-board generator, and air conditioning system.
  • High Power Demand Applications: Any application that requires high voltage and/or high output power can benefit from this technology.


  • Efficiency: The technology allows for efficient conversion of alternating current input into alternating voltage output.
  • Versatility: It can be used in a variety of applications, from electrified vehicles to high power demand applications.
  • Improved Power Supply: The technology ensures a steady supply of high voltage and/or high output power.


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