W Darrell Buchanan

Title: W Darrell Buchanan: Innovator in Electrical Power Assist Technology

Introduction

W Darrell Buchanan is a notable inventor based in Monrovia, CA (US). He has made significant contributions to the field of electrical power assist technology, particularly for wheeled vehicles. His innovative approach has the potential to enhance the riding experience for users of bicycles and similar vehicles.

Latest Patents

Buchanan holds a patent for an "Electrical power assist apparatus for a wheeled vehicle." This invention describes an advanced electrical power apparatus designed to assist riders in powering their bicycles. The apparatus features a rechargeable battery that connects to a DC motor, which engages with the vehicle's wheel in a controlled manner. The torque delivered by the motor varies with the vehicle's speed, following a predetermined non-uniform profile. This innovative control is achieved by modulating a switch's duty cycle, allowing for a motor torque that decreases as the vehicle's speed increases. The system also includes a charger that utilizes a flyback-type DC-to-DC converter for battery charging.

Career Highlights

Buchanan's career is marked by his work at Aerovironment, Inc., where he has contributed to various projects focused on innovative technologies. His expertise in electrical systems and power assist mechanisms has positioned him as a valuable asset in the field.

Collaborations

Buchanan has collaborated with notable figures in the industry, including his coworker Paul B MacCready. Their joint efforts have further advanced the development of innovative technologies in the realm of wheeled vehicles.

Conclusion

W Darrell Buchanan's contributions to electrical power assist technology exemplify his commitment to innovation. His patent for an electrical power assist apparatus showcases his ability to enhance the functionality of wheeled vehicles. Through his work at Aerovironment, Inc., he continues to influence the future of transportation technology.