How an Electric Bicycle Works: A Complete Technical Guide

The electric bicycle is one of the most elegant convergences of human-powered transportation and modern engineering. It takes the familiar diamond-frame bicycle - an invention barely changed in over a century - and weaves into it a sophisticated ecosystem of lithium cells, permanent-magnet motors, microprocessors, torque sensors, and regenerative braking circuits. The result is a machine that amplifies human effort rather than replacing it, making cycling accessible to a far wider range of riders than ever before. This book is written for the curious rider, the aspiring mechanic, the engineering student, and anyone who has ever asked, 'How does this thing actually work?' It assumes no prior knowledge of electronics or engineering. Every concept is built from first principles, illustrated with real-world examples, and grounded in the physics and chemistry that make e-bikes possible.