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The universal motor is a type of electric motor that can operate on either AC or DC power and uses an electromagnet as its stator to create its magnetic field. [1] It is a commutated series-wound motor where the stator 's field coils are connected in series with the rotor windings through a commutator. It is often referred to as an AC series motor.
March 2000 to September 2001 [2] Mount Usu (有珠山, Usu-zan [3]) is an active stratovolcano in the Shikotsu-Tōya National Park, Hokkaido, Japan. It has erupted four times since 1900: in 1910 (which created Meiji-shinzan [4] ), 1944–45 (which created Shōwa-shinzan ), August 7, 1977, [5] and on March 31, 2000. To the north lies Lake Tōya.
An electric generatoris mechanically identical to an electric motor, but operates in reverse, converting mechanical energy into electrical energy. Electric motors can be powered by direct current(DC) sources, such as from batteries or rectifiers, or by alternating current(AC) sources, such as a power grid, invertersor electrical generators.
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An industrial type of AC motor with electrical terminal box at the top and output rotating shaft on the left. Such motors are widely used for pumps, blowers, conveyors and other industrial machinery. An AC motor is an electric motor driven by an alternating current (AC). The AC motor commonly consists of two basic parts, an outside stator ...
Model rocket motor classification. Motors for model rockets [1] and high-powered rockets [2] (together, consumer rockets) are classified by total impulse into a set of letter-designated ranges, from ⅛ A up to O . The total impulse is the integral of the thrust over burn time. Where is the burn time in seconds, is the instantaneous thrust in ...
The 2007 Wimbledon Championships Men's Singles final was the championship tennis match of the men's singles tournament at the 2007 Wimbledon Championships. A part of the storied Federer–Nadal rivalry, it pitted the world No. 1 and defending champion Roger Federer against the world No. 2 Rafael Nadal. After 3 hours and 45 minutes, Federer ...