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The poles can be varied at a ratio of 1:2 and thus the speed can be varied at 2:1. [ 7 ] [ 8 ] [ 9 ] Normally, the electrical configuration of windings is varied from a delta connection (Δ) to a double star connection (YY) configuration in order to change the speed of the motor for constant torque applications, such as the hoists in cranes .
There is no defined minimum output, however, it is generally accepted that a motor with a frame size of less than 35mm square can be referred to as a 'micro-motor'. Fractional-horsepower electric motors are exempt from the US Energy Policy Act of 2005 and the new EN 60034-30:2009 [1] ruling of European directive 2005/32/EC [2] concerning the ...
It was invented and sold by the Electric Boat company. [1] [2] The electric trolling motor was invented by O.G. Schmidt in 1934 [3] in Fargo, North Dakota, when he took a starter motor from a Ford Model A, added a flexible shaft, and a propeller. Because his manufacturing company was near the Minnesota/North Dakota border, he decided to call ...
Oceanvolt is a Finnish boat electric motor manufacturer founded in 2004 by Janne Kjellman. The company was formerly known as Electric Ocean. Oceanvolt is headquartered in Vantaa, Finland. The company currently produces two types of propulsion systems for electric boats: saildrives and shaftdrives.
Marine propulsion is the mechanism or system used to generate thrust to move a watercraft through water. While paddles and sails are still used on some smaller boats, most modern ships are propelled by mechanical systems consisting of an electric motor or internal combustion engine driving a propeller, or less frequently, in pump-jets, an impeller.
The word traction from Latin, being the agent noun of trahere "to pull" in the sense of "drawn" [1] [2] [3] was used for the naming of traction engines developed circa 1870. [4] The first experimental electric traction motor tramway of 1875 was rapidly developed internationally for city use.
A motor controller is a device or group of devices that can coordinate in a predetermined manner the performance of an electric motor. [1] A motor controller might include a manual or automatic means for starting and stopping the motor, selecting forward or reverse rotation, selecting and regulating the speed, regulating or limiting the torque, and protecting against overloads and electrical ...
An axial flux motor (axial gap motor, or pancake motor) is a geometry of electric motor construction where the gap between the rotor and stator, and therefore the direction of magnetic flux between the two, is aligned parallel with the axis of rotation, rather than radially as with the concentric cylindrical geometry of the more common radial ...