D is for DC MOTORS
DC motors are a type of motor that runs on direct current (DC) electricity. They were responsible for replacing combustion and steam engines in many types of machinery. They are most commonly found in powered electrical devices and can run off batteries which is why they have been used for the first generation of electric vehicles.
Brushed DC motors create torque by using stationary magnets surrounded by spinning electro magnets. Brushless DC motors have a spinning electro magnet in the centre with stationary magnets on the outside as part of the casing.
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