Compact Underwater Turbine

Jan. 11, 2007
Researchers at the University of Southampton turned an electric motor upside down to create a more efficient generator.

Julie Kalista
Online Editor

The minimal components of the integrated electric generator.
The tested prototype.
Researchers at the University of Southampton turned an electric motor upside down to create a more efficient generator. The idea came from their tethered underwater vehicle with much smaller and more powerful electric thrusters for propulsion, with the new generator made from its electric motor.

Most current tidal stream generators are just wind turbines that work underwater. The new generator eliminates complex gearboxes used in current marine turbines, the parts that often require expensive maintenance. Because it requires less power it is also cheaper to run. Turbine blades work equally well no matter what direction water flows past them so there is no need to turn to face the direction of the current, according to the team.

"Just drop the generator into flowing water and it will start generating electricity," says one of the researchers. "It works best in fast flowing, shallow water." The current prototype is 25-cm. across but the team has plans to build a larger model with improved propellers to increase efficiency.
The team hopes the generator will
be commercially available within five years.

More Information:
University of Southampton

This web-only article appears in the Motors Monthly email newsletter. If you enjoyed this article and would like to read more like it, sign up today for our free email newsletters!

Sponsored Recommendations

Diaphragm Pump Technology Drives Industrial Washers

Jan. 23, 2025
Discover high-performance pumps and systems built to handle various gases, liquids, and chemicals with precision.

Harmonic Drive Actuators with Integrated Drive Technology

Jan. 17, 2025
Discover the future of motion control.In this video, we explore how integrated drive technology (IDT) from Harmonic Drive is revolutionizing the precision mo...

7 factors to Consider When Choosing the Right Gear Technology

Jan. 17, 2025
Choosing a drive involves several design factors that depend greatly on the task at hand. This top 7 list will guide you, whether your task requires precise and exact movements...

What are the Benefits of Actuators with Integrated Servo Drives?

Jan. 17, 2025
Actuators with Integrated Servo Drive Technology (IDT) simplify cable management, control hardware, and commissioning while achieving outstanding performance in a compact size...

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!