There are many innovations turning up in the latest experimental and production electric cars, affecting everything from batteries to motors to control systems. The need to make them all work together is prompting a complete rethink about the way cars should be designed and manufactured, and it is unclear which technologies will dominate as the constraints imposed by internal combustion engines give way to the new limits and possibilities associated with electric propulsion. But one group of engineers have stuck their necks out and declared that a particular technology, the electric hub motor, is likely to become the most widely used drive system. A hub motor, as its name suggests, is built into the hub of a wheel and drives it directly, rather than having a single motor driving the wheels via a mechanical transmission. It is an idea pioneered by Ferdinand Porsche, the founder of the carmaker of the same name, more than 100 years ago. Mr Porsche got his first job in the automotive business with Jacob Lohner in Vienna, and put electric motors into the hubs of the wheels of the Lohner-Porsche, a vehicle which made its debut at the 1900 World’s Fair in Paris. It […]