Wells Engineered Products

Rotary Position Sensors

An Accurate, Inexpensive Alternative

Advanced motor technology is one of the keys to success in electric vehicles and elsewhere. Maximizing performance hinges on knowing rotor angular position and speed: higher accuracy means competitive advantage, especially if it’s achieved by a smaller, lighter and cheaper rotary position sensor offered either as a full custom sensor solution for a specific application or as an off-the-shelf solution.

While a VR resolver is an analog device, this new sensor is capable of providing either analog or digital outputs and a wider range of options for types of data delivered. Besides providing mechanical rotation position, this sensor is specifically designed to provide highly accurate electrical position for easy commutation calculations.

With all our rotary position sensors, the benefits are size, flexibility, and ease of use to name a few. All Wells Engineered Products rotary position sensor solutions are specifically designed to use our proprietary rotary position sensor magnet technology.

Pixel, our off-the-shelf universal sensor solution is a position sensor specifically tailored to provide the fastest path to production for your electric motor program. The same benefits remain in an easy-to-use package, exclusively provided by Wells. If time to market is a concern, consider using a Pixel.

Application Guide: Rotary Position Sensors

Review the wide variety of Rotary Position Sensor projects that our engineering team is working on with customers! Includes project overviews, specifications, as well as magnet and sensor design verification plans.


Webinar: Rotary Position Sensing for EV Powertrain Applications

Co-hosted with SAE International

Watch the archived 30-minute webinar event at your convenience!

A Better Sensor for Electric Motors

In most electric traction motors, rotor position and speed are obtained by a VR resolver. Until now it was the best available technology, but Wells Engineered Products has something better: an innovative rotary position sensor.

Protected by multiple patents, this sensor performs the same core function as a VR resolver but does it better while costing less and taking up less space.

Advantages of Wells Rotary Position Sensors

These new sensors are smaller than an equivalent VR resolver. Giving an electric motor designer more flexibility and space for other uses, while enabling easy integration into existing motor designs, and saves weight. It’s also field-serviceable.

Wells Engineered Products Rotary Position Sensor Characteristics

  • Patented technology
  • Accuracy superior to that of VR resolver designs
  • Semi-circular package for space-constrained applications
  • Weighs less than an equivalent VR resolver
  • Easy calibration
  • Serviceable
  • Insensitive to local magnetic fields
  • Provided accurate electrical rotational position for easy commutation calculations

Your Partner for Collaboration

Our team of engineers understand that every application is different. Maximizing performance means tailoring the sensor to suit. That’s why collaboration is deeply ingrained in every project and process.

The patented rotary position sensor was designed with customization in mind. Mounting location, layout and even sensor outputs are all adaptable to suit your requirements. Even hub motors are candidates.

Wells Engineered Products uses a variety of methods for producing prototypes to tight timescales. With 3D printing and other “rapid” technologies, sensors are in testing or customer hands as quickly as possible. Our well-equipped test facilities, coupled with ISO 17025 certified validation labs, provide excellent resources for ensuring our rotary position sensors will deliver the performance and durability required by the most demanding applications.

Manufacturing Capabilities for Rotary Position Sensors

Wells Engineered Products sees value in automating manufacturing wherever practical. This keeps costs low and helps ensure the consistently high-quality customers have come to expect.

Volume is always a factor in automation and Wells has sufficient flexibility to produce whatever quantities are required. High volumes lend themselves to automated manufacturing, but Wells processes are also configurable for small and medium order quantities.

Take a Step Forward

Accurate measurement of rotor position is essential in EV traction motor applications where controllability, performance and smooth torque are critical. Rotary position sensors from Wells Engineered Products enable a step-change in electric motor control. Smaller and lighter than VR resolvers, this sensor delivers better accuracy, smaller form-factor, and flexibility in your design and all for a lower price than conventional VR resolvers. Contact a product specialist at Wells Engineered Products to learn more.

Contact Us

Wells Engineered Products
385 W. Rolling Meadows Drive
Fond du Lac, WI 54937
(920) 922-5900

Contact: [email protected]