Method and apparatus for regulating excitation of an alternator

一种交流发电机、交流电的技术，应用在发电机的频率和电压控制、控制发电机、使用发动机驱动的牵引等方向，能够解决不能充分地响应电压波动、反应慢等问题

Active Publication Date: 2011-08-10
KOHLER CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, reasonably priced digital voltage regulators are slower to react than analog regulators and may not respond adequately to voltage fluctuations resulting from transient load conditions, and their software needs to be customized for different alternator designs

Method used

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  • Method and apparatus for regulating excitation of an alternator
  • Method and apparatus for regulating excitation of an alternator

Examples

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Embodiment Construction

[0016] first reference figure 1 The generator set 100 includes an engine 102 and an alternator (or synchronous generator) 104, and has a typical rated power between 20KW and 2000KW or above. Engine 102 is typically an internal combustion engine powered by gasoline, diesel, natural gas, or other fuel, and provides torque to a rotor of alternator 104 . The rotation of the rotor produces a rotating magnetic field which induces an alternating current in the stator coil set.

[0017] Such as figure 2 As shown in , the alternator 104 is a three-phase synchronous machine whereby the rotation of the rotor 140 produces a rotating magnetic field which induces an AC voltage at the stator coil set 150 . Specifically, rotor 140 is driven by a shaft 142 connected to engine 102 . The strength of the magnetic field is controlled by a mechanism comprising an exciter 108 comprising a set of stationary coils 144 surrounding an armature coil 146 wound on a rotor 140 . The armature coil 146 i...

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Abstract

A hybrid voltage regulator controls the voltage of three phases of alternating electricity produced by an alternator. A digital voltage regulator produces an average of the RMS voltage for each phase and produces an error value based on a ratio of the voltage to the frequency of the alternating electricity. The RMS voltage average and the error value are used to modify a voltage command designating a desired voltage level. The modified voltage command is processed by an analog voltage regulator that rectifies the alternator output voltage which then is averaged over an period of time. The resultant average voltage value is utilized to modify the voltage command to produce a regulated voltage command that determines a level of current to apply to excite the alternator.

Description

[0001] Cross References to Related Applications [0002] Not applicable [0003] Federally Sponsored Research and Development Statement [0004] Not applicable technical field [0005] The present invention relates to the control of a generator set comprising a motor that mechanically drives an alternator, and in particular to regulation of the voltage produced by the alternator. Background technique [0006] Electric generator sets (or "gensets") are widely used to generate electricity. A generator set typically includes an engine coupled to an alternator that converts rotational energy from the engine into electrical power. The output voltage of the genset is proportional to both the flux density in the alternator and the engine speed. Magnetic flux density is typically determined by controlling the field current or excitation level of the alternator, while the speed of the engine is typically determined by an engine governor. [0007] Many conventional alternators ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P9/44B60L50/10
CPCH02P9/305
Inventor 赞恩·C·伊顿道格拉斯·W·多恩埃里克·阿尔布斯梅尔哈里森·奇尤伊萨克·弗拉姆普顿
Owner KOHLER CO
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