Voltage-stabilized single-phase brushless neodymium-iron-boron alternating-current generator

An alternator, NdFeB technology, applied in synchronous machines, electrical components, electromechanical devices, etc., can solve the problems of not meeting the requirements of use, large changes in output voltage, and inability to adjust permanent magnets, and achieves light weight and operation. Reliable, high air gap flux density effect

Inactive Publication Date: 2004-01-28
夏红元
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The current single-phase AC generators all adopt electric excitation structure. Due to the existence of brushes and slip rings, the operation is unreliable and requires frequent maintenance. In addition, the rotor needs to be excited by DC current, resulting in loss and heat generation, and low operating efficiency.
Using a general permanent magnet generator, since the permanent magnet cannot be adjusted, the output voltage changes greatly, which cannot meet the requirements of use

Method used

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Examples

Experimental program
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Embodiment Construction

[0008] The present invention will be further described below

[0009] There are two sets of windings on the stator, one is the direct-axis winding that generates the output voltage, the other is the horizontal-axis winding that generates the AC voltage, a fixed capacitor is connected in series on the horizontal-axis winding, and there is a magnetically conductive rotor body on the rotor. Ventilation holes are evenly opened on the rotor body, and NdFeB permanent magnets are glued on the outer circle of the body, and the magnetic steel must be fixed reliably. There is a pair of additional poles (or voltage stabilizing poles) composed of magnetizers placed on the rotor. The function of the additional poles is to maximize the magnetic flux under load. The material of the magnetizers should consider the magnetic permeability and strength. Requirements, and the shape is determined by the analysis of the magnetic field distribution. There should be enough clearance between the addit...

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PUM

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Abstract

A pair of additive electromagnetical pole is added to rotor of the generator, and a group of lateral axis winding is installed on the stator to produce the invented AC generator. Proper capacitance is connected to the said winding so that leading current is generated. Thus, when the load current is raised, the total flux is raised so as to improve output voltage characteristic in order to meet the requirement of use. The invented generator possesses the features of simple structure, without sliding ring, brush and without need of DC excitation source so as to have the performances of high efficiency, low temperature rise. The technique is also suitable to three-phase magneto alternator.

Description

technical field [0001] The present invention relates to a permanent magnet generator, and more specifically, the present invention relates to a voltage-stabilizing single-phase brushless neodymium-iron-boron alternator. Background technique [0002] The current single-phase AC generators all adopt electric excitation structure. Due to the existence of brushes and slip rings, the operation is unreliable and requires frequent maintenance. In addition, the rotor needs to be excited by DC current, which generates heat loss and low operating efficiency. Using a general permanent magnet generator, since the permanent magnet cannot be adjusted, the output voltage varies greatly, which cannot meet the requirements of use. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a single-phase brushless NdFeB permanent magnet AC generator with additional pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27H02K21/00
Inventor 夏红元
Owner 夏红元
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