Company Filing History:
Years Active: 2005-2006
Title: The Innovations of Robert A. Fournier
Introduction
Robert A. Fournier is a notable inventor based in Newington, CT (US). He has made significant contributions to the field of multi-phase step motors, holding a total of 3 patents. His work focuses on enhancing the performance and stability of step motors through innovative methods.
Latest Patents
Fournier's latest patents include a "Method to prevent midrange resonance during operation of a multi-phase step motor." This invention involves increasing the frequency of the pulse width modulator within a step motor control circuit above a base frequency under defined conditions. This adjustment enables more accurate construction of the phase current waveform, effectively preventing mid-range resonance. The method steps the PWM frequency between frequencies by a fixed amount above the base frequency, which helps to prevent the excitation of system harmonics and operational instability in step motors.
Another significant patent is the "Method and apparatus for independently controlling each phase of a multi-phase step motor." In this invention, the current in each phase of a multi-phase step motor is monitored. The excess phase current above the set point is reduced on a cycle-by-cycle PWM basis, ensuring that each phase current is brought down to the set point. The PWM frequency is automatically adjusted to maintain a minimum number of PWM edges within a portion of the current waveform, providing accurate independent current control within each phase.
Career Highlights
Throughout his career, Robert A. Fournier has worked with prominent companies such as Ims GmbH and Schneider Electric Motion USA, Inc. His experience in these organizations has contributed to his expertise in motor control technologies.
Collaborations
Fournier has collaborated with notable individuals in his field, including David J. Coutu and David Coutu. These collaborations have likely enriched his work and led to further advancements in his inventions.
Conclusion
Robert A. Fournier's contributions to the field of multi-phase step motors through his innovative patents demonstrate his commitment to enhancing technology in this area. His work continues to influence the industry and pave the way for future advancements.