doubly-fed motor

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• Doubly fed electric machine — Doubly fed electric machines are electric motors or electric generators that have windings on both stationary and rotating parts, where both windings transfer significant power between shaft and electrical system. Doubly fed machines are useful… …   Wikipedia

• Doubly-fed electric machine — Doubly fed electric machines (i.e., electric motors or electric generators) belong to a category of electric machines that incorporate two multiphase winding sets of similar power rating that have independent means of excitation. As a result,… …   Wikipedia

• Electric motor — For other kinds of motors, see motor (disambiguation). For a railroad electric engine, see electric locomotive. Various electric motors. A 9 volt PP3 transistor battery is in the center foreground for size comparison. An electric motor converts… …   Wikipedia

• Singly-fed electric machine — Singly fed electric machines (i.e., electric motors or electric generators) belong to a category of electric machines that incorporate one multiphase winding set, which is independently excited, actively participates in the energy conversion… …   Wikipedia

• Vector control (motor) — Vector control (also called Field Oriented Control, FOC) is one method used in variable frequency drives to control the torque (and thus finally the speed) of three phase AC electric motors by controlling the current fed to the machine.MethodThe… …   Wikipedia

• Linear motor — A linear motor or linear induction motor is essentially a multi phase alternating current (AC) electric motor that has had its stator unrolled so that instead of producing a torque (rotation) it produces a linear force along its length. The most… …   Wikipedia

• Electric generator — U.S. NRC image of a modern steam turbine generator In electricity generation, an electric generator is a device that converts mechanical energy to electrical energy. A generator forces electric charge (usually carried by electrons) to flow… …   Wikipedia

• Electrical generator — In electricity generation, an electrical generator is a device that converts mechanical energy to electrical energy, generally using electromagnetic induction. The reverse conversion of electrical energy into mechanical energy is done by a motor …   Wikipedia

• Direct torque control — (DTC) is one method used in variable frequency drives to control the torque (and thus finally the speed) of three phase AC electric motors. This involves calculating an estimate of the motor s magnetic flux and torque based on the measured… …   Wikipedia

• Electric machine — The academic study of electric machines is the universal study of electric motors and electric generators. By classic definition, electric machine is synonymous with electric motor or electric generator, which are electro mechanical energy… …   Wikipedia

• Environmental technology — (abbreviated as EnviroTech) or green technology (abbreviated as GreenTech) or clean technology (abbreviated as CleanTech) is the application of the environmental sciences to conserve the natural environment and resources, and to curb the negative …   Wikipedia