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Electrical power generator

Electrical generators convert mechanical energy to electricity. A typical generator set includes an engine, driven by a fuel such as gasoline, and a rotating shaft driven by the engine. The rotating shaft develops electric power, which is then used to power an electrical load. Electric power plants include hydroelectric power plants, thermal power plants, nuclear power plants and the like. These power plants generate electricity and deliver it to consumers through power transmission lines. A turbine power generator generates electric power by converting mechanical energy into electrical energy. The turbine power generator typically includes a stator and rotor to generate electrical power as the rotor turns within the stator. The rotor includes a set of permanent magnets and an armature. Synchronous power generators are commonly used by power utilities to produce electrical energy. Generators generally have a magnetic rotor that is surrounded by a stationary stator having conductive windings. Rotating magnetic field from the spinning rotor creates electric current in the armature windings in a stationary stator that surrounds the rotor. The current from these windings is output as electrical power from the generator. A single phase AC generator has a single armature winding on the stator, but this typically is used only for low power applications because of factors such as mechanical vibration and power pulsations. Typically, an individual electrical generator operates in a stand-by mode wherein the electrical power provided by a utility is monitored such that if the commercial electrical power from the utility fails, the engine of the electrical generator is automatically started causing the alternator to generate electrical power. Portable power supplies, such as portable power generator systems that incorporate a generator driven by an engine, are popular for many uses. The engine-driven generator produces raw AC power which is then converted to a higher quality AC power output. A controller adjusts the speed of the engine to regulate the AC power produced. The controller calculates a reference engine speed based upon an output signal from the current sensor and controls the engine such that the engine's speed generally matches the reference engine speed.

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