Leslie W Yoho

Title: The Innovative Contributions of Leslie W. Yoho

Introduction

Leslie W. Yoho is a prominent inventor based in Woodstock, NY (US), known for her significant contributions to the field of electrical engineering. With a total of two patents to her name, she has made remarkable advancements in motor drive technology and power conversion systems.

Latest Patents

One of her latest patents is for a three-phase AC motor drive. This invention is designed for a three-phase, 400 Hz AC induction motor, focusing on constant speed and constant load applications. The system rectifies an AC power source with a wide variation in voltage and frequency to establish a DC bus. A three-phase full-wave bridge inverter operates on this source, utilizing a cascaded sinusoidal reference signal generator to produce three sinusoidal voltages that are 120° phase-shifted from one another. This design helps reduce harmonic currents, and a high PWM frequency is employed to operate the power switches of the bridge, minimizing current harmonics. Additionally, a speed regulator generates an error voltage for effective speed regulation.

Another notable patent is for a control circuit and control method for a three-phase Vienna converter. This invention converts three-phase AC to DC while implementing active power factor control. The control electronics are galvanically isolated from the neutral of the input three-phase supply and the center terminal of the two series-connected output DC filter capacitors. Built entirely with analog devices, this converter meets stringent electromagnetic interference standards and operates effectively over a wide range of input supply voltages and frequencies.

Career Highlights

Leslie W. Yoho is currently employed at Ametek Rotron, where she continues to innovate and develop advanced electrical systems. Her work has significantly impacted the efficiency and performance of motor drives and power conversion technologies.

Collaborations

Throughout her career, Leslie has collaborated with talented individuals such as Basil Issac and Matthew Clark, contributing to various projects and advancements in her field.

Conclusion

Leslie W. Yoho's innovative work in electrical engineering, particularly in motor drive technology and power conversion, showcases her expertise and dedication to advancing the industry. Her contributions continue to influence the development of efficient electrical systems.