Richard M Dunham

Title: **Richard M. Dunham: Innovator in Arc Interrupting Technologies**

Introduction

Richard M. Dunham is a notable inventor based in Salisbury, NH, USA. With a wealth of innovative ideas, he holds two patents that reflect his expertise in electrical engineering and power supply technologies. His contributions have significantly impacted the fields of lamp ballasting and ion nitriding.

Latest Patents

One of Richard's latest innovations is the **Arc Interrupting Lamp Ballast**. This apparatus operates through high-frequency switching from a direct current (DC) supply, utilizing pulse-width modulation to regulate lamp energization. A common mode choke in this design assists in opposing rapid current changes, thereby enhancing performance and reliability. Additionally, a fast semiconductor switch is included, along with a current transformer that generates a control signal, ensuring the lamp operates safely by detecting arcing conditions.

Another significant invention is the **Ion Nitriding Power Supply**. In this power supply design, power to the discharge chamber is managed via a pulse-width modulated current switching device, combined with a switching inverter. This innovative approach smoothes out instant current variations through a series inductance. The design quickly extinguishes potential arcing with semiconductor switching devices that respond to voltage changes, ensuring effective and efficient operational integrity.

Career Highlights

Throughout his career, Richard has worked with prominent companies such as Walker Power, Inc. and Walker Magnetics Group, Inc. His experience in these roles allowed him to refine his technical skills and foster an environment of innovation.

Collaborations

Richard's collaborations with Walker companies have enabled him to leverage his engineering insights to develop key technologies further. His work has been instrumental in advancing systems that emphasize reliability and efficiency across various applications.

Conclusion

Richard M. Dunham stands out as an innovative force in the fields of electrical engineering and power supply technologies. His patents in arc interrupting systems showcase his commitment to enhancing safety and functionality in lamp systems and industrial applications. As new challenges arise in these sectors, inventors like Richard will continue to play a critical role in shaping the future of technology.