David J Carroll

Title: **David J Carroll: Innovator in Magnetic Bearing Technology**

Introduction

David J Carroll, an inventor based in Strafford, NH, has made significant contributions to the field of magnetic bearing technology. With a total of six patents to his name, Carroll's innovations focus on enhancing motor performance and efficiency through advanced engineering.

Latest Patents

One of Carroll's notable inventions is a **magnetic bearing using displacement winding techniques**. This innovation presents a linear and rotary spherical motor featuring an integrated magnetic bearing. The design utilizes a toothless permanent magnet, brushless DC (BLDC) technology, consisting of a permanent magnet rotor and a zigzag stator winding. This stator configuration includes at least two-phase windings crafted with multiple circuits, enhancing motor capabilities. The controllable axial bearing force can be adjusted through the differential balance of currents in the circuits, while the required motor torque is achieved by aggregating the individual currents within a phase.

Additionally, Carroll has developed an **integrated magnetic bearing** that combines a rotational magnetic gimbal with a magnetic bearing. His approach utilizes brushless DC motor technology for electromagnetic suspension, which employs a single actuator to manage both radial bearing and rotary torque functions. This invention integrates a rotor with permanent magnets and a stator composed of independently controlled coil segments, thereby simplifying the design and improving functionality.

Career Highlights

Throughout his career, Carroll has worked with various companies, notably including Airex Corporation. His experience has significantly shaped his understanding and expertise in motor design and magnetic bearing systems, allowing him to innovate effectively in this niche.

Collaborations

Carroll has collaborated with talented individuals such as James Sedgewick and Richard D Sedgewick. These partnerships have likely fostered creativity and contributed to the successful development of his patented technologies.

Conclusion

David J Carroll's work exemplifies the spirit of innovation through his patents focused on magnetic bearings and motor technology. His inventions not only advance the capabilities of existing technologies but also open the doors for future developments in electromagnetic systems. With a promising background and solid collaborations, Carroll continues to be a significant figure in the field of engineering.