Extreme motors

April 6, 2000
Motors and actuators used in harsh environments such as inside nuclear reactors must be water resistant, noncontaminating, radiation insensitive, and controllable over long distances.


Motors and actuators used in harsh environments such as inside nuclear reactors must be water resistant, noncontaminating, radiation insensitive, and controllable over long distances. In general, pneumatic and hydraulic actuators can meet these requirements but support equipment may be bulky and complex. In addition, hydraulics require a special noncontaminating fluid.

But Turtle gearmotors from Extreme Robotics, San Jose, meet the same requirements while using simpler, less-costly support equipment. Turtle servogearmotors are available with 40-W brush or brushless motors and offer a choice of resolver, encoder, or tachometer motor feedback, all directly coupled to the output shaft.

Because resolvers do not use optical sensors, they are less sensitive to radiation than encoders, and can operate for a limited time in wet or condensed-moisture conditions, making them ideal for nuclear environments. Resolvers mount directly to the driveshaft, as opposed to the back of the motor, acting as a secondary position feedback device to improve position accuracy. Hall-effect sensors used for commutation provide primary position feedback.

Sponsored Recommendations

The Digital Thread: End-to-End Data-Driven Manufacturing

May 1, 2024
Creating a Digital Thread by harnessing end-to-end manufacturing data is providing unprecedented opportunities to create efficiencies in the world of manufacturing.

Medical Device Manufacturing and Biocompatible Materials

May 1, 2024
Learn about the critical importance of biocompatible materials in medical device manufacturing, emphasizing the stringent regulations and complex considerations involved in ensuring...

VICIS Case Study

May 1, 2024
The team at VICIS turned to SyBridge and Carbon in order to design and manufacture protective helmet pads, leveraging the digitization and customization expertise of Toolkit3D...

What's Next for Additive Manufacturing?

May 1, 2024
From larger, faster 3D printers to more sustainable materials, discover several of the top additive manufacturing trends for 2023 and beyond.

Voice your opinion!

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