A variable speed constant frequency generator

Abstract

The invention relates to a generator, in particular to a generator with variable input speed and constant output current frequency, comprising a generator body, an exciter is arranged at the top of the generator body, and the generator body includes a generator rotor , generator poles, generator stator bars, generator stator lead wires, generator shafts and generator pole lead wires, the exciter includes exciter rotating parts, exciter armature, exciter poles, exciter pole leads and The exciter shaft is connected to the generator shaft, the output lead of the exciter armature is connected to the generator magnetic pole lead, and the excitation input of the exciter magnetic pole is a power frequency square wave current. The beneficial effect of the invention is that the rotation speed of the generator set can be adjusted at any time according to the optimal rotation speed of the prime mover, while maintaining a constant frequency current output, maximizing the energy utilization rate, and meanwhile, the generator has the advantage of brushless excitation.

Description

technical field [0001] The invention relates to a generator, in particular to a generator with variable input speed and constant output current frequency. Background technique [0002] At present, the generator uses a DC excitation current, and its output constant frequency current needs a constant speed, that is, it needs to run at a synchronous speed. However, the rotational speed of the prime mover is not constant under different input conditions to achieve optimal efficiency. Usually, in order to keep the current frequency of the generator constant, the prime mover is also operated at a constant speed, so that the energy utilization rate cannot be achieved. Maximize, resulting in a certain amount of waste; [0003] Moreover, the output of common excitation devices is DC current, while the excitation of variable-speed constant-frequency motors requires the use of square-wave currents, so the current excitation devices cannot meet the excitation needs of variable-speed co...

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Problems solved by technology

However, the rotational speed of the prime mover is not constant under different input conditions to achieve optimal efficiency. Usually, in order to keep the current frequency of the generator constant, the prime mover is also operated at a constant speed, so that the energy utilization rate cannot be achieved. Maximize, resulting in a certain amount of waste;

[0003] Moreover, the output of common excitation devices is DC current, while the excitation of variable speed constant frequency motors requires the use of square wave currents, so the current excitation devices cannot meet the excitation needs of variable speed constant frequency motors

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