Edward A Long

Title: Edward A Long: Innovator in Electromagnetic Control Systems

Introduction

Edward A Long is a notable inventor based in Chapel Hill, NC (US). He has made significant contributions to the field of electromagnetic control systems, holding a total of 3 patents. His work primarily focuses on enhancing the efficiency and safety of electrical systems.

Latest Patents

One of his latest patents is for a "Contactor Control System." This invention involves a method and apparatus designed to reduce multiple re-ignitions in an electromagnetic contactor. It incorporates a regulated source of electrical power connected to a contactor actuating coil through a controllable switch. The switch regulates the coil current to a desired value, allowing the opening time of the contactor to be determined within a defined range. The system monitors alternating current through the contactor tips and determines each zero crossing of the current waveform. It coordinates the opening of the contactor tips with these zero crossings, ensuring they separate within a predetermined phase angle prior to a zero crossing. Additionally, the system includes apparatus for detecting fault currents and inhibiting operation of the contact tips for a predetermined time interval, allowing fuses to clear faults before opening the contactor.

Another significant patent is for "Synchronous Motor Protection." This digital controller prevents excessive heating of squirrel cage windings during motor starting. It reduces motor excitation if the accrued excitation time exceeds the maximum allowable time for the controlled motor. The system allows for adjustments in allowable time based on changes in excitation voltage. The thermal characteristics of the controlled motor are automatically derived from a few manually entered set point values.

Career Highlights

Edward A Long is currently employed at General Electric Company, where he continues to innovate in the field of electrical engineering. His work has had a lasting impact on the efficiency and safety of electrical systems.

Collaborations

He has collaborated with James Wallace Hamilton, Jr., further enhancing the innovative capabilities within his field.

Conclusion

Edward A Long's contributions to electromagnetic control systems exemplify the spirit of innovation. His patents reflect a commitment to improving electrical safety and efficiency, making him a significant figure in his industry.