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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]
Two common definitions used today are the imperial horsepower as in "hp" or "bhp" which is about 745.7 watts, and the metric horsepower as in "cv" or "PS" which is approximately 735.5 watts. The electric horsepower "hpE" is exactly 746 watts, while the boiler horsepower is 9809.5 or 9811 watts, depending on the exact year. [clarification needed]
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.
Motor capacitors are used with single-phase electric motors [3]: 11 that are in turn used to drive air conditioners, hot tub/jacuzzi spa pumps, powered gates, large fans or forced-air heat furnaces for example. [1] A "dual run capacitor" is used in some air conditioner compressor units, to boost both the fan and compressor motors. [1]
Two electric motors were situated at the rear of the car, produced 2.5 hp (1.9 kW) each. The car weighed 2200 lb (998 kg). The 1904 Buffalo Tonneau was a tonneau model. It could seat 4 passengers and sold for US$3000. The dual electric motors, situated at the rear of the car, produced 5 hp (3.7 kW) each and used a 40-cell pasted plate battery.
All CitiCars made after this vehicle were produced as 48 volt models with the newer 3.5 hp GE series motor. [a] CitiCar #1751 (March 1975) saw a number of changes to the assembly line. Here is a list of changes at car #1751 – Dual master cylinder (was non-redundant single cylinder). Electric defroster. On earlier cars, the defroster -switch ...