A hub motor is an electric motor built directly into the hub of a wheel. A purported advantage of this design is that no additional transmission system is needed, thereby increasing the efficiency of the drive system. However, because electric motors are most efficient at high rates of revolution, direct drive hub motors tend to be inefficient. Integrated planetary gear drivetrains are sometimes included, but re-introduce transmission losses. Epicyclic gearing or planetary gearing is a Gear system that consists of one or more outer gears or planet gears revolving about a central or They are commonly found on motorized bicycles. A motorized bicycle, sometimes referred to as a light electric vehicle or LEV, is a Bicycle with an attached motor used to assist with pedaling Hub Motor Electromagnetic fields are supplied to the stationary windings of the motor. The outer part of the motor follows, or tries to follow, those fields, turning the wheel to which it is attached. Energy is transferred to a brushed motor through physical contact of brushes to the rotating shaft of the motor. Energy is transferred to a brushless motor electronically, requiring no physical contact between stationary and moving parts. Brushless motor technology is more expensive, but most are more efficient and longer-lasting than brushed motor systems. The statement Brushless DC electric motor may be misleading and controversial among professionals because it's actually an 3 phase AC motor driven by a DC source Most of the hub motors made in China are designed for bikes with Chinese dimensions but these conversion kits are made to suit western bike dimensions. Hub motors are not a new idea. In 1902 Ferdinand Porsche at age 27 working for Lohner developed hub motors which initially ran on lead acid batteries and soon after had a petrol generator to charge the batteries: the first Hybrid vehicles. [2] Hub motors can also be found on buses.
The proposed Zap-X Electric Vehicle envisioned to enter the market in 2010 "would use high-tech electric hub motors at all four wheels, delivering 644 horsepower to the ground from a lithium-ion battery pack. The hub motors would eliminate the need for transmission, axles and conventional brakes, opening up space beneath the floor for a giant battery pack. "[1]
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Locking hubs, also known as free wheeling hubs are an accessory fitted to many Four-wheel drive vehicles allowing the front wheels to be manually disconnected fromDapyx Software network: MP3 Explorer | Ebook Manager | Zenithic