Joseph Gerald Marcinkiewicz

Title: Joseph Gerald Marcinkiewicz: Patents in Exercise Technology and Power Electronics.

Introduction

Joseph Gerald Marcinkiewicz is an inventor associated with Leeds, Great Britain. His patent work spans exercise equipment and digital power-factor correction, combining motor control with electronic circuit design.

Latest Patents

Marcinkiewicz’s listed patents include Exercise apparatus and method and Digital power factor correction circuit. He is credited with 2 patents.

Exercise apparatus and method describes an exercise machine driven by a switched reluctance motor. The invention uses a controller that responds to sudden changes in load on the moving exercise surface, adjusting motor torque to maintain a desired speed without a flywheel. The disclosed approaches include feedback control using rotor-position and motor-speed signals, as well as a state observer that estimates rotor position, speed, and load disturbances for real-time control.

Digital power factor correction circuit describes a digital circuit that compares an electric system’s actual DC bus voltage with a desired voltage. It generates a pulse-width-modulated attenuation signal, which adjusts a time-varying source voltage to provide a current demand signal for controlling the current drawn from the line.

Career Highlights

The companies associated with Marcinkiewicz’s career include Switched Reluctance Drives Limited and Emerson Electric Company. His patent portfolio reflects work in both motor-driven exercise apparatus and power electronics.

Collaborations

Marcinkiewicz’s listed coworkers include David Mark Sugden and Phillip G. Langhorst. These names provide context for the professional connections associated with his work.

Conclusion

Joseph Gerald Marcinkiewicz’s patents address practical challenges in motor control and electrical power management, illustrating the range of his contributions to engineering innovation.