This inventor holds 2 USPTO granted patents. Top assignees: Cutler-Hammer, Inc., Park-Ohio Industries. Active years: 1979-1983.
Company Filing History:
Years Active: 1979-1983
Title: The Innovations of Robert L Risberg
Introduction
Robert L Risberg is a notable inventor based in Milwaukee, WI (US). He has made significant contributions to the field of electrical engineering, holding a total of 2 patents. His work primarily focuses on frequency conversion and motor control systems.
Latest Patents
One of his latest patents is the "Solid State Frequency Converter." This invention utilizes a series of SCR diamond bridge circuits to generate frequencies that exceed the individual operating frequencies of the SCRs. The design includes a series chain of diamond circuits that are coupled in parallel with a DC blocking capacitor and an inductive load. The system is powered by a substantially ripple-free constant current source, allowing for controlled firing times of individual SCRs to minimize di/dt in each SCR.
Another significant patent is the "Closed-Loop Regulating and Overhauling Load Energy Dissipating Chopper." This invention is a chopper-type armature current control system for a D.C. motor connected across the output of a rectifier. It features closed-loop regulating control and an overhauling load energy dissipating circuit that activates automatically when the output potential exceeds a predetermined value. A modified version of this system includes a fixed D.C. potential to enhance speed response and enable controlled slow-speed reverse operation of the motor.
Career Highlights
Throughout his career, Robert L Risberg has worked with several prominent companies, including Park-Ohio Industries and Cutler-Hammer, Inc. His experience in these organizations has contributed to his expertise in developing innovative electrical solutions.
Conclusion
Robert L Risberg's contributions to electrical engineering through his patents demonstrate his commitment to innovation and problem-solving in the field. His work continues to influence advancements in frequency conversion and motor control systems.