Method for controlling rotational speed of engine generator

Abstract

The invention discloses a method for controlling rotational speed of an engine generator, belonging to the technical field of engine generators. The method comprises the following steps: obtaining an n-IA1 curve graph, an n-IA2 curve graph, an n-DCLV curve graph and a DCLV-n curve graph according to an open loop characteristic curve of the generator; judging whether a current work region of the generator is a saturated region, a transition region or a linear region and judging a 1.1-time DCLV work region; outputting a target rotational speed of the generator through a dynamic discretization method if the work region of the generator is the saturated region or the transition region; and keeping the target rotational speed of the generator unchanged if the work region of the generator is the linear region. According to the method for controlling the rotational speed of the engine generator, the target rotational speed of the generator is adjusted by judging the working state of the generator and output through the dynamic discretization method so that the response capacity of the direct-current output voltage of the generator is ensured and the service life of the generator is prolonged, and therefore, the generator can work in a more efficient state.

Description

technical field [0001] The invention relates to the technical field of engine-driven generators, in particular to a method for controlling the rotational speed of an engine-driven generator. Background technique [0002] The target speed adjustment of the engine-driven generator is mainly based on the engine working state as a reference, that is, considering the engine load and the engine working environment (temperature, atmospheric pressure, etc.) to adjust the engine target speed. [0003] There is an engine-driven generator that can provide output margin and respond quickly to load changes. By adjusting the target conduction angle and setting the target conduction angle within a range smaller than the maximum conduction angle, the generator The output has a margin, which can provide stable voltage and quickly respond to load changes, so as to achieve the purpose of adjusting the generator speed. [0004] However, the above-mentioned generators still have the following d...

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Problems solved by technology

[0005] In order to solve the problem that the target speed adjustment of the current engine-driven generator does not consider the working state of the generator, which will affect the response capability of the generator's DC output voltage, and the engine output margin does not take into account the generator's DC output voltage and generator excitation current. and the problem of mutual influence between the generator speed and the problem of complicated setting of the generator target conduction angle and inconvenient adjustment, an engine-driven generator speed control method is now provided

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