Calnetix Technologies Awarded Two Patents for Electromagnetic Actuator and Linear Velocity Sensor

June 20th, 2012

Cerritos, Calif. – June 19, 2012 – Calnetix Technologies, a pioneer in developing and manufacturing high-speed permanent magnet motor generators, power electronics and magnetic bearings for a variety of applications and industries, recently received two new patents.

The awards covered the company’s High-Aspect-Ratio Homopolar Permanent-Magnet-Biased Electromagnetic Actuators and Sensors for non-contact measuring of linear rotor velocities in rotating machines.

“Traditionally, homopolar permanent-biased electromagnetic actuators had the tendency to have shorter length and larger diameter compared to more conventional heteropolar EM-biased actuators,” said Inventor and Calnetix’s Principal Research Engineer Alexei Filatov. “While it was an advantage in some machines, in other applications, it would be preferable to have a higher ratio between the bearing length and diameter. This invention allowed us to better address the needs of such applications. It also allowed us to design homopolar permanent-biased magnetic bearings that could be used as direct replacements of the heteropolar EM-biased actuators in the existing machines, offering a significant performance improvement for the existing users of machines on magnetic bearings.”

Calnetix also developed a linear non-contact velocity sensor that can be used to provide information about the linear axial velocity of the rotor to a magnetic bearing controller.

“We utilized this sensor in combination with Calnetix’s patented axial electromagnetic actuator with a flux feedback to improve the performance of a passive axial magnetic bearing. This could be beneficial for a variety of machines on magnetic bearings,” said Filatov.

About Calnetix Technologies

Calnetix Technologies, LLC (“Calnetix”), headquartered in Cerritos, CA, is focused on Innovation That Drives Industries. The company specializes in high-performance, high-speed motor generators and best-in-class advanced magnetic bearings and control systems. Calnetix’s patented, underlying technologies, which have been in use since the company’s inception in 1998, have made Calnetix a world leader in the design and production of high-speed machines. The company’s overall technology portfolio and system integration capabilities have led to development and production contracts with industry leaders and the start of many successful subsidiaries that focus on unique niche markets. For more information, please