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A ZQDR-410 traction motor (the large, dark component on the axle with small ventilation holes) A traction motor is an electric motor used for propulsion of a vehicle, such as locomotives, electric or hydrogen vehicles, or electric multiple unit trains.
Small DC motors are used in tools, toys, and appliances. The universal motor, a lightweight brushed motor used for portable power tools and appliances can operate on direct current and alternating current. Larger DC motors are currently used in propulsion of electric vehicles, elevator and hoists, and in drives for steel rolling mills.
A brushless DC electric motor (BLDC), also known as an electronically commutated motor, is a synchronous motor using a direct current (DC) electric power supply. It uses an electronic controller to switch DC currents to the motor windings producing magnetic fields that effectively rotate in space and which the permanent magnet rotor follows.
The traction motors may be powered directly or via rechargeable batteries, making the vehicle a type of hybrid electric vehicle. This method of transmission is sometimes termed electric transmission, as it is identical to petrol–electric transmission , which is used on vehicles powered by petrol engines, and to turbine–electric powertrain ...
The traction motor(s), reduction gear, and power electronics are combined into a single Ultium Drive unit that drives the front, rear, or both axles. Three electric motor designs, sharing a common stator, are used across all planned vehicles. [4] [5] Ultium is used by GM's BEV3 and BT1 platforms. [6]
Electric motors can deliver their maximum torque over a wide RPM range. This means that the performance of a vehicle with a 100 kW electric motor exceeds that of a vehicle with a 100 kW internal combustion engine, which can only deliver its maximum torque within a limited range of engine speed.