According to Franco Gonzalez, senior technology analyst, IDTechEx, there are about 200 companies making traction motors for electric vehicles, rather like the 200 making the lithium-ion batteries that increasingly power them. However, whereas three types of lithium-ion battery chemistry and construction are taking almost all of the business, with traction motors the situation is much more complex because the diversity of needs calls for many very different types of motor from brushless out-runner motors for