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In addition, both electric motors now are used as motors and generators; motor/generator A uses ferrite magnets and has an output of 48 kW (64 hp) / 118 N⋅m (87 lbf⋅ft), while motor/generator B uses rare earth magnets and has an output of 87 kW (117 hp) / 280 N⋅m (210 lbf⋅ft).
Traction motors are used in electrically powered railway vehicles (electric multiple units) and other electric vehicles including electric milk floats, trolleybuses, elevators, roller coasters, and conveyor systems, as well as vehicles with electrical transmission systems (diesel–electric locomotives, electric hybrid vehicles), and battery ...
A 5 hp electric motor powered by four 6-volt batteries gave the craft a maximum possible speed of 4.4 knots (8.1 km/h). At a crusing speed of 3.1 knots (5.7 km/h), it could travel 30 to 40 nautical miles (56 to 74 km). Its maximum operating depth was 50 feet (15 m). [9]
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 have efficiencies ranging from around 15%-20% for shaded pole motors, up to 98% for permanent magnet motors, [101] [102] [103] with efficiency also dependent on load. Peak efficiency is usually at 75% of the rated load. So (as an example) a 10 HP motor is most efficient when driving a load that requires 7.5 HP. [104]
Structure of a series-hybrid vehicle. The grey square represents a differential gear. An alternative arrangement (not shown) is to have electric motors at two or four wheels. Series hybrids are also referred to as extended-range electric vehicles (EREV) [5] or range-extended electric vehicles (REEV), or electric vehicle with extended range ...