Douglas Frey

Title: Douglas Frey - Innovator in Battery Charging Technology

Introduction

Douglas Frey is a notable inventor based in Bethlehem, PA (US). He has made significant contributions to the field of battery charging technology. His innovative approach has led to the development of a unique high current battery charger that enhances efficiency and functionality.

Latest Patents

Douglas Frey holds a patent for a Universal High Current Battery Charger. This charger utilizes a driven blocking oscillator type design, featuring a three-winding transformer. The primary winding connects in series with the collector-emitter path of a switching power transistor. The secondary winding is linked to a sense transistor that responds to the current flowing through the switching power transistor. The tertiary winding connects in series with the battery or battery packs being recharged. This design allows for charging through current pulses, making it effective across a wide range of input voltages and battery voltages. The charger is designed to operate efficiently worldwide, ensuring that it only functions when at least one rechargeable battery is in the circuit.

Career Highlights

Douglas Frey is associated with Solid State Chargers Research and Development Limited, where he continues to innovate in the field of battery technology. His work has been instrumental in advancing the capabilities of battery chargers, making them more versatile and efficient.

Collaborations

Douglas has collaborated with Philip K. Hoffman, contributing to the development of cutting-edge battery charging solutions.

Conclusion

Douglas Frey is a pioneering inventor whose work in battery charging technology has made a significant impact. His innovative designs and patents continue to influence the industry, showcasing his commitment to advancing technology.