Barker Mohandas

George Wisner,Technology Director,

staff photo

George Wisner leads our work related to elevator power electronics, and new applied technologies particularly in power conversion and energy savings. Since joining us in 2001 he has reviewed various elevator manufacturers’ drive products, including the 1st practical high power factor regenerative drive for existing elevator motors, and improved our specifications in these areas.

From 1995-1999 George was Manager of Drives Engineering at the Otis Worldwide Research & Development Engineering Center. Earlier, he was Manager of Electronic Systems at United Technologies Research Center (UTRC). He was instrumental in developing highly reliable “green” power electronics including for the highest rise and speed elevators to 15 m/s, and innovatively adapting the technologies for low-speed and existing elevators.

He was a member of the Otis product strategy team to improve product energy efficiency. His prior experience included support to Carrier and Otis in resonant link inverters, switched reluctance motors, synchronous and brushless DC motors, energy storage, active noise control, active magnetic bearings, magnetic suspension, low EMI/high power factor correction, and lasers. His experience also includes spread spectrum technology, and power conversion systems for micro-turbines and fuel cell power generation.

George holds a BSEE from the University of Connecticut, is a member of IEEE, has 10 published papers and 14 patents, including one to eliminate elevator traveling cables. His work with young engineers and scientists is well known. George is founder and chairman of the Connecticut Science Fair, that our firm also helps support.

His experience also includes:
• 200 kW peak AC regenerative drives for high speed and rise elevators
• Regenerative, unity power factor AC drives for low-rise elevators
• DCPWM convertor technology to modernize existing elevator machines
• Inverter technology providing high AC line power factor and low EMI
• Drive self-commissioning software for cost-effective tuning on site
• Digital processing serving as basis for next-generation elevator drives


Résumé, 30+ Years Experience,
Including Advanced Electronic Systems

Barker Mohandas, LLC, USA
Advanced Technology Director

Wisner Associates, Connecticut
Advanced Technology Consultant to Barker Mohandas, LLC

Otis Elevator, Worldwide Research & Development Center, Farmington, Connecticut
Manager, Drives/Power Electronics Engineering

United Technologies Research Center, East Hartford, Connecticut

Manager, Electronic Systems
Chief, Electro-Optic Instrumentation
Supervisor, Electro-Optic Instrumentation
Research Engineer