William T Fejes, Jr

Title: Innovations of William T Fejes, Jr.

Introduction

William T Fejes, Jr. is a notable inventor based in Needham, MA (US). He has made significant contributions to the field of motor control technology, holding two patents that showcase his innovative spirit and technical expertise.

Latest Patents

One of his latest patents is a "Current Sensing Circuit for Motor Controls." This invention includes an impedance network with a capacitor that produces a voltage proportional to the steady-state component of current, along with an inductance that generates a voltage proportional to the transient component. The capacitor voltage modulates a carrier signal, which conveys the steady-state component through an isolation transformer to a demodulator. The transient component is conveyed through a second isolation transformer and is summed with the demodulated steady-state component.

Another significant patent is the "Self-Starting Transducerless, Brushless D.C. Motor Controller." This invention features a transducerless brushless permanent magnet motor that utilizes a signal induced by the rotor in an unexcited winding to sense the rotor position. The induced voltage is integrated to represent the magnetic flux coupling the rotor and winding. Before start-up, both the rotor position and the integrator are initialized to align the circuit representation of the flux with the actual flux. Additionally, a self-initialization circuit is provided to automatically preset the rotor and flux integrator to predetermined and corresponding values.

Career Highlights

Throughout his career, William T Fejes, Jr. has worked with prominent companies such as Imec and Allen-Bradley Company, LLC. His experience in these organizations has contributed to his development as an inventor and innovator in the field of motor control systems.

Collaborations

William has collaborated with notable individuals in his field, including Donald E Fulton and William P Curtiss. These collaborations have likely enriched his work and contributed to the advancements in his inventions.

Conclusion

William T Fejes, Jr. is a distinguished inventor whose work in motor control technology has led to significant innovations. His patents reflect a deep understanding of electrical engineering and a commitment to advancing technology in this area.