CN2127528Y

CN2127528Y - Permanen magnet generator

Info

Publication number: CN2127528Y
Application number: CN 92203695
Authority: CN
Inventors: 郭占生
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-02-28
Filing date: 1992-02-28
Publication date: 1993-02-24
Anticipated expiration: 2002-02-28

Abstract

The utility model relates to a voltage stabilizing permanent magnet generator, belonging to the technical field of permanent-magnet electric generators for vehicles. The utility model is characterized in that the movable rotor assembly of the generator comprises a permanent magnet, a magnetic-inductive claw pole, a spline and an adjusting mechanism of the movable rotor. The rotor and a spindle is in the spline fit, and the rotor can be flexibly moved on the spindle. The rotor adjusting mechanism is composed of a centrifugal flying iron, a connecting rod and a tension spring. The rotor is connected into integration by the connecting rod and the centrifugal flying iron, the radial moving force of the centrifugal flying iron is converted into the axial moving force by the connecting rod, so the density of magnetic force line of the stator is changed, and the purpose that the voltage of the generator is stabilized though the rotation speed is varied is reached.

Description

Permanen magnet generator

The utility model relates to car permanent magneto, particularly a kind ofly is applicable to no accumulator railcar generator.

At present, mainly there is the shortcoming of voltage instability in the permanent magnet generator that uses on the motor vehicles, it is very big that voltage just changes corresponding fluctuation with the speed of a motor vehicle, application number be CN85100421A patent disclosure a kind of permanent magnetism and electromagnetism brushless generator excited combinably, flux sleeve, magnetic guiding loop and magnetizing coil have been adopted on its structure, though can reach the purpose of voltage stabilizing, structure more complicated, cost height.

The utility model purpose just is to provide a kind of voltage stabilizing good at the shortcoming of existing permanent magnet generator and the weak point of above-mentioned patent, and structure advantages of simple and the low voltage-stabilizing permanent magnet alternator for vehicle of cost more.

The utility model is achieved through the following technical solutions.This generator comprises casing, main shaft, belt pulley, parts such as stator winding and movable rotor assembly.Wherein movable rotor assembly comprises magnetic conduction the pawl utmost point, annular permanent magnet and spline.Movable rotor and main shaft are spline fitted, can axially move along main shaft jointly, and movable rotor governor motion is flown iron, connecting rod, pivot pin, extension spring etc. and formed by centrifugal, and it fuses by connecting rod and movable rotor.Under the lower situation of static state or rotating speed, the centrifugal iron that flies abuts against on the main shaft under the extension spring effect, and the magnetic line of force of rotor affacts on the stator to greatest extent.The main shaft two ends all by Bearing Installation on two end caps of casing, stator is fixedly mounted between rotor and the casing, a end that main shaft stretches out is installed belt pulley.

The basic principle of this generator generating voltage-stabilized electricity by use is: the N of annular permanent magnet, S the two poles of the earth affact on the stator by the magnetic conduction pawl utmost point, and the density of wherein passing the stator winding magnetic line of force is relevant with the relative position of rotor and stator.When generator is in static state or low-speed running, rotor is in the cavity that stator surrounds, that is to say, it within the diameter of stator bore rotor, at this moment the generator leakage field is less, the density of line of magnetic force of passing stator winding is bigger, help inducing higher voltage in the stator winding, with the raising gradually of rotating speed, voltage will have trend of rising, but since the rotor governor motion under action of centrifugal force, haul movable rotor and keep away bore of stator gradually, the generator leakage field increases, and the density of line of magnetic force of passing stator winding causes its induced voltage to have a declining tendency from large to small, this shows, though the output voltage of generator can be with the increasing and rise of rotating speed, but can be with passing diminishing and descending of stator winding density of line of magnetic force, Here it is should generating function realizes the purpose of automatic voltage regulation generating.

Also it should be noted that: the comparable general permanent magnet generator of the stator winding of this generator is many around some circles, to improve the low speed power generation performance of this generator, during high speed, regulates this generator output voltage by the rotor governor motion.

The utility model is compared with existing permanent magnet generator, low-speed characteristic is fabulous, and has good voltage regulation performance, compares with existing patent, its structure has simplification greatly, saved magnetizing coil and flux sleeve, magnetic guiding loop etc., therefore, cost is lower, processing and assembling are more prone to, keep in repair also conveniently, and useful life is also longer, therefore can be widely used in various equipment of small motor vehicles.

Accompanying drawing is this practical axial section schematic diagram, and wherein 1 is casing; 2 and 3 is shell end covers; The 4th, main shaft; 5 and 6 is bearings; The 7th, belt pulley; The 8th, stator winding; The 9th, stator winding output voltage binding post; The 10th, rotor assembly; 11 and 12 is magnetic conduction pawl utmost points, the 13rd, and annular permanent magnet, the 14th, rotor governor motion; The 15th, spline; The 16th, the connecting rod of governor motion; The 17th, the centrifugal iron that flies; The 18th, extension spring.

Be described in further detail as follows to embodiment of the present utility model in conjunction with the accompanying drawings: the casing of this generator; Belt pulley and stator winding etc. are all similar with prior art, and its installation site relation as shown in drawings.The most important technical characterictic of the utility model is that its rotor can axially move along main shaft.Rotor and main shaft are spline fitted, and rotor assembly is mainly by spline 15; Annular permanent magnet 13; The magnetic conduction pawl utmost point 11 and 12 and movable rotor governor motion 14 form.In order to prevent that foreign material such as iron pin are adsorbed on the rotor magnetic conduction pawl utmost point; Permanent magnet is irritated with the epoxy resin envelope to the space between the spline.In order to reduce the leakage field loss of annular permanent magnet as far as possible, spline non-magnet material manufacturing is as brass.Because between main shaft and the permanent magnet spline is arranged, institute's heart main shaft can be made with steel.As better with the non-magnet material meeting.Rotor integral body can axially move along main shaft, and the governor motion 14 of rotor is by connecting rod 16; Centrifugal iron 17 and extension spring 18 compositions of flying, connecting rod 16 links to each other with rotor 10 by bearing pin or other modes one end, and the other end and the centrifugal iron phase that flies connect.One end of extension spring 18 connects the centrifugal iron 17 that flies, and the other end is connected on the

main shaft

4, and 15 of splines are installed on the main shaft 4.Rotor can move on main shaft 4 flexibly by spline.

When this generator has just rotated, because rotor and position of stator are just right, whole magnetic loop magnetic resistance minimum, the leakage field minimum, pass the density of line of magnetic force maximum of stator winding 8, so though this moment, rotating speed was not high, voltage grows out of nothing, can meet the requirements of scope rapidly, along with the raising of rotating speed, centrifugal to fly the centrifugal force that iron 17 produces increasing, overcome the pulling force of extension spring 18, the footpath is outwards moved, and makes connecting rod 16 haul rotor 10 and moves axially along main shaft 4 by spline 15.Thereby rotor 10 and stator 8 distances are increased, it is big that the magnetic resistance of whole magnetic loop becomes, leakage field increases, the density of line of magnetic force of passing stator winding 8 from large to small, so this moment, though rotating speed was higher, the output voltage of generator is very not high, and Here it is, and this generator can be regulated the stable groundwork process of sustaining voltage by automatic stepless.

Claims

1, a kind of voltage stabilization permanent magneto generator is made of casing, main shaft, belt pulley, stator and movable rotor assembly, it is characterized in that movable rotor assembly comprises permanent magnet, the magnetic conduction pawl utmost point, spline and movable rotor governor motion; Rotor and main shaft are spline fitted, rotor can move on main shaft flexibly, the rotor governor motion is made up of the centrifugal iron, connecting rod, extension spring of flying, rotor is fused by connecting rod and the centrifugal iron that flies, fly the power that iron moves radially and convert the power that rotor axial moves to centrifugal by connecting rod, thereby changed the stator magnet lines of force density, though reach rotation speed change, the purpose that voltage is still stable.

2, according to the described voltage stabilization permanent magneto generator of claim 1, it is characterized in that rotor is in the bore of stator under the lower situation of static state or rotating speed, during high speed, rotor is away from bore of stator.

3,, it is characterized in that spline is by the non-magnet material manufacturing according to the described voltage stabilization permanent magneto generator of claim 1.

4, according to the described voltage stabilization permanent magneto generator of claim 1, the governor motion that it is characterized in that movable rotor is flown iron, connecting rod and extension spring and is formed by centrifugal, connecting rod links to each other with rotor by bearing pin or other modes one end, the other end and the centrifugal iron phase that flies connect, one end of extension spring is connected centrifugal flying on the iron, and the other end is connected on the main shaft, and a spline part is on main shaft, another part and movable rotor are combined closely, and rotor can axially move on main shaft flexibly.

5, according to the described voltage stabilization permanent magneto generator of claim 1, it is characterized in that having in the rotor governor motion the centrifugal iron that flies, the centrifugal iron radial centrifugal force that flies, convert the active force of regulator generator voltage to.