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Method for improving efficiency of synchronous generator

A technology for synchronous generators and generators, applied in the direction of controlling generators through changes in the magnetic field

Inactive Publication Date: 2014-02-12
丁士来
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The permanent magnet synchronous generator has the advantages of small size, light weight, high efficiency, and simple structure, but it has not been widely used in the field of power generation due to the problem of voltage regulation.

Method used

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  • Method for improving efficiency of synchronous generator
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Embodiment Construction

[0022] A method for improving the power generation efficiency of a synchronous generator involved in the present invention mainly involves taking a larger magnetic load B δ and a small line load A; the rotor excitation magnetic field is always at the highest point when the generator is working; the stator armature coil is adjustable. For the design of permanent magnet synchronous generators, the excitation magnetic field is provided by permanent magnets, but the strength of the permanent magnet's magnetic field directly affects the performance of the generator. At present, it is better to use rare earth permanent magnets with higher magnetic field strength; The stator armature coil of the machine is wound so as to be adjustable.

[0023] The above-mentioned take the larger magnetic load B δ , is to make the excitation magnetic field as strong as possible. To further increase the strength of the rotor excitation magnetic field on the existing basis, the magnetic saturation of...

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Abstract

The invention provides a method for improving the efficiency of a synchronous generator. The characteristics that 'the relation of the size of an excitation magnetic field and the input power of the generator when the synchronous generator works is small, and the output voltages of the synchronous generator is in direct proportion to the turn number of a stator coil and the strength of the excitation magnetic field' are used for achieving the method. In the designing process, the strength of a rotor excitation magnetic field is designed to be as bigger as possible, and when the generator works, no mater whether loads are big or not, the strength of the rotor excitation magnetic field is made to be at or close to the maximum value; the number of the turns of each phase of a three-phase stator coil is reduced; the stator coil of the generator is designed to be of a power source structural mode with multistage different voltages and with the turn number capable of being adjusted, when the generator works, a power source with the voltage value being more corresponding to the number of the turns of the stator coil is chosen to be connected according to the loads, and then the excitation magnetic currents of a rotor is fine tuned to enable output voltages to reach a rated value. The method for improving the efficiency of the synchronous generator is used for a permanent magnet synchronous generator which is then made to have the performance of adjustable voltages, and the energy-saving effect is achieved.

Description

technical field [0001] The invention relates to a method for improving the efficiency of a synchronous generator, which belongs to the field of alternating current power generation. Background technique [0002] The phenomenon of electromagnetic induction and the basic laws of electromagnetic induction are the theoretical basis for designing and manufacturing transformers and synchronous generators. A transformer is an electrical device that converts an alternating current of a certain voltage value into another voltage value of the same frequency. The power generation principle of a synchronous generator comes from the phenomenon of electromagnetic induction. All kinds of electromagnetic induction phenomena should follow the law of electromagnetic induction, among which Faraday electromagnetic induction The law is one of the main theoretical basis for people to engage in the research, design and application of synchronous generators. The law points out that "when the magnet...

Claims

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Application Information

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IPC IPC(8): H02P9/14
Inventor 丁士来丁世东丁颖颖郭君珊郭国勤李振中丁磊
Owner 丁士来
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