Location History:
- Shawnee Township, Allen Co., OH (US) (1981)
- Lima, OH (US) (1981)
- Shawnee Township, Allen County, OH (US) (1985)
Company Filing History:
Years Active: 1981-1985
Title: The Innovations of Charles L Doughman
Introduction
Charles L Doughman is a notable inventor based in Lima, OH (US). He has made significant contributions to the field of electrical engineering, holding a total of 3 patents. His work primarily focuses on improving the efficiency and functionality of power systems.
Latest Patents
One of Doughman's latest patents is for the "Detection of DC content in an AC waveform." This invention involves generating the DC content of each phase of a three-phase AC waveform by partially filtering each phase and applying the filtered waveforms through a multiplexer to a sample and hold circuit. This circuit measures the instantaneous value of each phase at two points spaced an exact odd number of half-cycles apart. The readings are processed by an analog to digital converter and averaged to determine the DC content for each phase, which is then compared to a threshold value. An output signal is generated when the accumulated volt-seconds exceed a selected value.
Another significant patent is related to "Controlling the circulating current in naturally commutated static power." This invention focuses on retarding the firing pulses to the nonload carrying bank of a naturally commutated thyristor power circuit to reduce or eliminate interbank circulating current. By summing half-wave rectified load current signals with the output waveform reference signal, the pulses in the nonload carrying bank are effectively retarded.
Career Highlights
Doughman has had a distinguished career at Westinghouse Electric Corporation, where he has applied his innovative ideas to enhance power systems. His work has been instrumental in developing technologies that improve the reliability and efficiency of electrical systems.
Collaborations
Throughout his career, Doughman has collaborated with notable colleagues, including Kenneth C Shuey and Donal E Baker. These collaborations have contributed to the advancement of various electrical engineering projects.
Conclusion
Charles L Doughman is a prominent inventor whose work has significantly impacted the field of electrical engineering. His innovative patents and contributions to Westinghouse Electric Corporation highlight his dedication to advancing technology in power systems.