Charles E Rettig

Title: Innovative Contributions of Charles E. Rettig

Introduction: Charles E. Rettig, an accomplished inventor based in Brookfield, Wisconsin, has made significant contributions to the field of electrical engineering with a total of four patents. His inventions, particularly in the realm of protection circuits for rectifiers, demonstrate a profound understanding of electronic systems and their applications in various industries.

Latest Patents: One of Rettig's notable inventions is the Voltage Limit Protection Circuit for Phase Controlled Rectifiers. This circuit effectively prevents shoot-through and limit cycling conditions by regulating the direct current (d.c.) output voltage of the rectifier bridge. The design follows a voltage reference signal, ensuring the reference signal does not exceed the input derived from the alternating current (a.c.) voltage applied to the bridge. When the reference signal surpasses the a.c. derived input, the circuit limits the maximum available d.c. voltage to prevent damage. Additionally, the invention incorporates a slew limit circuit to control the rate of signal changes and a magnitude limit circuit that helps guide the firing circuit of the rectifier bridge.

Another important patent is the Commutation Sensor Circuit for a DC-to-DC Silicon Controlled Rectifier, designed to protect against commutation failure in a silicon controlled rectifier (SCR) chopper circuit. This sensor assesses the commutation capability by measuring applied voltage and predicting the available commutation voltage after a main SCR is activated. By performing these measurements, the sensor ensures the chopper maintains optimal performance and initiates commutation as required.

Career Highlights: Throughout his career, Rettig has worked for notable companies such as Litton Industrial Products, Inc. and Magnetek, Inc., where he honed his skills and contributed to significant advancements in electrical systems. His expertise in developing protective circuits has had a lasting impact on the industry.

Collaborations: Rettig collaborated with esteemed colleagues, including Stanley L. Mann, to innovate and refine his inventions. Their combined expertise has led to remarkable advancements in electronic protection systems.

Conclusion: With a keen understanding of electrical engineering, Charles E. Rettig has established himself as a prominent inventor through his valuable patents. His work, particularly in voltage limit protection and commutation sensor circuitry, highlights the importance of innovation in ensuring the reliability and safety of electrical systems. As technology continues to evolve, inventors like Rettig pave the way for future advancements in the field.