Charles J Juhnke

Title: The Innovative Mind of Charles J Juhnke

Introduction

Charles J Juhnke, an accomplished inventor based in Deerfield, IL, has made significant contributions to the field of electric machine protection through his inventive patents. With a total of two patents to his name, Charles has developed innovative solutions that enhance the reliability and safety of electrical systems.

Latest Patents

Charles's latest patents focus on over-voltage protection for wye connected electric machines. His first patent, "Over-voltage protection circuit for wye connected electric machine," describes a load dump circuit that features a silicon controlled rectifier. This rectifier is strategically connected between the common terminal of the wye and one of the output terminals of the electric machine. In cases of excessive voltage due to rapid load changes, the circuit utilizes a Zener diode sensing mechanism to activate the controlled rectifier, effectively shunting the output windings. The invention also incorporates means to terminate field excitation during the shunting condition, ensuring maximal operational safety.

The second patent, simply titled "Over-voltage protection circuit," outlines an enhanced protection system tailored for electric generating machines. This circuit employs a controlled rectifier that shunts the output winding during over-voltage situations. It includes impedance means in series with the controlled rectifier, along with regulation circuitry that prevents field excitation when current flows through the impedance. Charles's innovation also features an improved triggering system utilizing a Zener diode and a transistor switch to guarantee accurate activation of the controlled rectifier.

Career Highlights

Charles J Juhnke is associated with C.E. Niehoff & Co., where he applies his engineering expertise to develop cutting-edge electrical systems. His work at the company exemplifies his commitment to enhancing electric machine functionality and safety.

Collaborations

Throughout his career, Charles has collaborated closely with his coworker, Hans Jakobs. Together, they have fostered a synergistic environment that promotes innovative thinking and practical solutions in electric machine technology.

Conclusion

In conclusion, Charles J Juhnke stands out as a prominent inventor in the realm of electric machine protection. His patents, focusing on over-voltage protection circuits, not only exhibit his technical prowess but also reflect his dedication to creating safer and more reliable electrical systems. With such innovations, he continues to contribute significantly to the field, ensuring that advancements in technology are accompanied by enhanced safety measures.