CN87104898A

CN87104898A - The annulus low, middle high frequency alternator

Info

Publication number: CN87104898A
Application number: CN 87104898
Authority: CN
Inventors: 王焕生
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-07-12
Filing date: 1987-07-12
Publication date: 1988-01-20

Abstract

The annulus low, middle high frequency alternator is the stator that constitutes it with a plurality of annulus iron cores on each iron core by spiral coiling, with framework and screw rod they are linked up, with a plurality of in succession electro-magnet rotors of rotating shaft, the method of between two annulus stators, cutting with one pole, there are a plurality of spiral windings to constitute on the annulus stator, each the spiral winding two ends that is cut produce the NS utmost point respectively, to the opposite electric current of the excitatory generation direction of its adjacent winding that another is not cut, each one pole cutting can make two spiral windings produce the opposite alternating current of direction simultaneously like this, just can produce the high alternating current of frequency when rotor rotates a circle.Reduce the magnetic pole number and can produce low frequency ac.

Description

The invention relates to low, middle high frequency alternator, the particularly invention of circular ring type low, middle high frequency alternator, this motor is the annulus iron core that studs with protruding rake tooth with a plurality of both sides, on each iron core, press spiral coiling and constitute its stator, with framework and screw rod they are linked together, connect a plurality of rectangle electro-magnet rotors with a rotating shaft, the two ends one pole of its rotor is installed between the annulus stator.

A kind of known low frequency a.c. generator is arranged, and its operation principle is the synonyms pole cutting stator winding generation simultaneously alternating current of electromagnet.

Another kind of known medium-high frequency inductor type alternating current generator, its operation principle is based on the existence of the surperficial teeth groove of rotor (also claiming inductor) and make the variation of air-gap permeance generating period, its excitation winding is mounted on the stator, makes that this generator utilance is low.

The object of the invention is that the operation principle that changes these two kinds of generators reduces the factor that the excessive power consumption of iron loss is high and magnetic field energy can not make full use of, the electricity generating principle method of using same one pole cutting produces the low, middle and high frequency alternating current, reduces the cost cost of alternating current generator.

The operation principle of this generator is achieved in that as operation principle circuit and magnetic circuit figure one, solid line in the annulus is represented the N utmost point of electromagnet one pole, this one pole direction of motion is clockwise, horizontal dotted line in the ring and arrow are represented the magnetic line of force direction that the winding that cut by magnetic pole produces, vertical arrow is represented the sense of current, the NS utmost point on the rake tooth is that magnetic pole cuts formed magnetic pole, both sides are the methods with the one pole cutting between two annulus stators, there are a plurality of spiral windings to constitute on the annulus stator, each spiral winding two ends of being cut by one pole produce the N utmost point S utmost point (judging with right-hand screw rule) respectively, adjacent another is not excitatory by one pole cutting auger winding to it, the magnetic force line cutting that makes this adjacent winding be subjected to it produces the alternating current opposite with the winding direction that is cut, each one pole cutting can make two spiral windings produce electromotive force and electric current simultaneously like this, and current opposite in direction, because cutting and a plurality of spiral winding of a plurality of one poles, the high alternating current of frequency just can change when rotor rotates a circle.Reduce its winding number and rotor number and can produce low frequency ac.

The annulus stator is all to stud with protruding rake tooth 1 with the silicon steel of casting or the silicon steel sheet both sides of punching, spiral in the direction of the clock winding in each pane between protruding rake tooth, winding in each lattice is connected with the prime minister with winding in another lattice is first, and tail is connected as shown in the figure with tail.

If track ring is 8 spiral windings, the one pole of rotor is corresponding with it to be 4.As shown in the figure.

Can be corresponding with it when increasing this unit frequency with 16 windings be 8 corresponding methods of one pole, in the time of need continuing to increase frequency according to motor speed, should increase the diameter of track ring, and Using such method increases progressively winding number and rotor number.

Reduce frequency and successively decrease, can increase track ring and magnetic pole number if increase one pole power with the method.Figure two, ring stator core.

Implement illustration three, two rotors are installed in a rotating shaft, four one poles of the every end of each rotor, connect by brush 1 spiral excitation winding on collector ring input dc power and 3 electromagnetic cores, mode of connection is pressed the sense of current shown in the arrow and is connected collector ring two ends 11 utmost point input dc powers, annulus stator in the middle of install 6 position between two rotors, another rotor electromagnet 7 is identical with 3, its exciting current is a direct current of introducing the input of front end collector ring by lead along rotating shaft, long tooth forms the NS utmost point respectively at the electro-magnet rotor two ends, annulus stator spiral winding both sides are the corresponding cuttings of magnetic pole that are subjected to one pole of the same name like this, each spiral winding current of annulus stator is to move along same direction in the middle of making, shown in figure four, the magnetic pole direction of motion inwards, the sense of current is as shown by arrows.

Implement illustration five, low, middle high frequency alternator schematic diagram, rotor shown in the figure three is contained between three annulus stators, and brush carrier (brush carrier of synchronous generator) is fixed on the position of motor frame 1, rotor-exciting winding 2, rotor main pole one pole 3, middle annulus stator 4.

Excitation system: the output lead-in wire that this generator can utilize it by rectifier through brush and collector ring to rotor-exciting winding excitation, also can pass through the DC generator excitation, the big I of exciting current is with reference to having the synchronous alternator excitation parameter now.

Can design with reference to existing synchronous generator calculating mode the definite of rotor volume stator volume, consult the 19th piece of " motor engineering handbook " Volume Four, version China Machine Press published in 1982.

Determining of annulus core-diameter, internal diameter, thickness

Under the prerequisite of determining this machine annulus cumulative volume unshakable in one's determination, design sequence should followingly be consulted accompanying drawing two.

1, determines annulus exradius R.

2, determine inside diameter D and external diameter L according to the annulus outside diameter, L must with rotor main pole equal diameters, want corresponding mutually during design and consider.

3, the ratio of internal diameter and outer path length L and interior circular diameter D generally should be near 1: 1 λ=(L)/(D)=1: 1

4, this machine annulus cumulative volume V unshakable in one's determination is the thickness h of annulus iron core than the numerical value of annulus area S remainder.

Calculating formula is as follows: S=π (R ²-r ²)

In the formula: S-annulus area; The R-annular radii; Circular diameter in the r-annulus.

The cumulative volume V of annulus iron core is than annulus area S.Remaining numerical value is gross thickness unshakable in one's determination: h=(V)/(S).

If the generator of being made up of two annulus, so the thickness of every annulus should be h=(V)/(S * 2).

If be made up of three annulus, the thickness of intermediate stator sheet is twice than two stator thickness in edge.

For example: the thickness of two edge stator pieces is respectively 1Cm, and the thickness of middle this stator piece is exactly 2Cm,

Determining of stator dimensions: it can increase its diameter according to the needs that power increases, the thickness ratio of diameter and ring generally should be determined at 20: 1, and available number and the rotor number that increases track ring increases its power output simultaneously, the thickness of rake tooth should a little higher than coil thickness

Determining of rotor size: the rotor main pole is identical with the track ring diameter, and the volume of magnetic pole can be determined by existing magnetic circuit account form.Magnet pole widths is identical with spiral winding width, consults accompanying drawing one.

If the annulus stator of the motor that is made of three annulus stators in the middle of packing into earlier installed the rotor of its both sides then.The rake tooth of annulus stator and rotor magnetic pole constitute the pole span of air gap.

This generator is compared with conventional electric generators and had the following advantages: one, thermal diffusivity is good, frame for movement is simple; Two, since one pole to cut eddy current unshakable in one's determination little; Three, magnetic field energy can be fully used and be converted into electric energy, its according to be ought be not directly another adjacent winding of cutting can induced current by one pole, this not only make magnetic field energy in the stator be fully used and also transporting eddy current, can improve the utilization rate of motor. Because iron loss is very little and thermal diffusivity is good, be to replace silicon steel sheet with monoblock silicon steel, cost can obtain descending.

Four, this generator can be applicable to large, medium and small power AC power, three AC power aspects particularly generally using, the synchronous generator that present high-power thermal power generation is used, to its cooling technology complexity, interior cold more complicated to rotor, the attached cooling device costliness that helps, the ground area of standing is big, every day is huge in cooling and the generator reactive heating institute power consumption source numeral of thermal power generation diesel generation, this novel electricity generator has replaced traditional square rafter type stator with annulus, particularly can produce alternating current by the one pole cutting, the generator reactive power consumption is descended significantly.

Five, traditional medium-high frequency alternating current generator Exciting Windings for Transverse Differential Protection and output winding generally all are wound on the stator, rotor does not have winding, power consumption is high, this traditional structure has been eliminated in the present principles invention, can improve electric efficiency, to metal smelting, the aspects such as manufacturing of the applied electron accelerator of high-energy physics, superconductor play positive role.

Design program

One 1 determine rotating speed 2 voltages 3 electric currents 4 estimation efficient

21 annulus electrical steels are selected 2 annulus core volumes, 3 numbers

41 rotor core volumes, 2 diameters, 3 length, 4 coil turns

31 annulus external diameter 2 internal diameters unshakable in one's determination, 3 areas, 4 thickness

2 coilings of 51 stator coil volumes are in the thickness 3 triangle transverse tooth thickness on annulus stator plane

612 stator frame

Claims

1, low, middle high frequency alternator, particularly circular ring type low, middle high frequency alternator, this motor are with a plurality of both sides the stator that constitutes it by spiral coiling to be arranged on the annulus iron core of protruding rake tooth, with screw rod and framework they are associated in together.

A, connect a plurality of rotors, the rectangle electromagnet be housed on its two ends of rotor constitute its rotor with a rotating shaft, between two annulus stators with the method for one pole cutting.

The one pole of B, electromagnet is to cut respectively at its both sides annulus stator winding.

Spiral winding number on C, each track ring is a times of magnetic pole number on the rotor.

2, according to the described motor of claim 1, the method that it is characterized in that increasing spiral winding number on the annulus iron core and increase progressively the electromagnet number in proportion can be made the medium-high frequency alternating current machine.

Reduce their relative numbers and can be made into low frequency a.c. generator.

3,, use a plurality of track rings and a plurality of rotor that has magnetic pole to can be made into heavy-duty motor according to claim 1,2 described motors.

4, according to claim 1,2,3 described motors, annulus stator both sides are that magnetic pole of the same name is corresponding in the middle of it is characterized in that.