Living Like Ed - (Page 61) Here’s how it works. Stored energy, in the form of a battery, feeds an electric motor, which then propels the unit. Endurance, speed, and distance are limited by the amount of energy stored and by the rate of discharge to the motor. Great strides in improving performance have been made in recent years, thanks to innovative technologies that have created batteries with higher energy densities that charge faster and weigh less. The best systems may incorporate sophisticated battery management computer chips that both protect the battery and enhance performance. The digital revolution also has had a major impact through the creation of microprocessors that efficiently calculate and send precise bursts of energy to the motor. Another major innovation has been the creation of a link between human and motor-driven power. The result is a form of hybrid power whereby pedaling force triggers a proportional energy contribution to the motor. This linkage significantly increases range and, depending on how an electric bike is tuned, it can raise top speed substantially without too much deterioration to that range. With microprocessors doing much of the work behind the scenes, throttles and other annoyances can be disposed of, creating a simple interface and a more bikelike experience. Electric bikes are an efficient alternative for urban transportation, for commuting shorter distances, and now even for fitness and fun, as on the hybrid pedalec versions that allow a rider to travel greater distances at a faster pace. Compared with automobiles, the hybrid bike’s energy use and carbon footprint are infinitesimal. So, in the process of enjoyment and practical use, you can really benefit the planet, plus get some light exercise for your own well-being. And, of course, operating costs are far lower than for most other means of transportation. Ed now has several iZip bikes, and they free him from his dependence on the automobile for daily situations, such as shopping, buying a paper or coffee, visiting friends, and generally getting around. In the process, he enjoys a better standard of living with a closer connection to the world, and to his own emotional and psychic center, while helping maintain his own physical vibrancy. 61 2: transportation —Larry Pizzi miles or less, it’s really easy to make the change from driving to biking. If just one person in
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