CN1055450A - Petal type large coil winding disc electric machine - Google Patents

Abstract

A kind of petal type large coil winding disc electric machine, it mainly is made up of stator, rotor, active wheel etc.Stator mainly comprises iron core, winding and stator case, it is characterized in that said winding adopts the big coil windings of petal type, it not only conveniently rolls off the production line, has higher mechanical strength and dielectric strength, area of dissipation bigger, and increased the magnetic flux area, improve induced electromotive force, thereby improved single-machine capacity and efficient.

Description

Petal type large coil winding disc electric machine

The invention relates to a kind of disc type electric machine, more specifically say so and adopted the big coil windings axial air-gap of novel petal disc type electric machine.

Existing axial air gap electric machine mainly is the disc-type electric motor that is called that occurs the seventies.Applied for a kind of axial air gap electric machine Chinese patent application CN87108319.1 number, the one, the two gap structures of two stator single rotors; The one, stator is Duoed many gap structures of one than rotor, but total version, particularly winding configuration and above-mentioned disc-type electric motor indifference (referring to Fig. 3).The common fault of this type of axial air gap electric machine is: the iron core forming difficulty, and especially its winding construction still adopts the technology of radial air gap conventional motors, and the groove number is more, iron core forming is just difficult all the more.Its reason is: iron core is to use to reel towards the silicon strip of grooved hole to form, and all unequal with the distance that goes up between every adjacent slot, like this will refinement degree height, complex process, equipment be also very expensive.So since coming out the seventies, be not greatly developed always.

Purpose of the present invention will overcome above-mentioned shortcoming exactly, a kind of improved axial air gap electric machine is provided, and it makes the groove number of stator core significantly reduce, and winding has bigger magnetic flux area, thereby improve single-machine capacity and efficient, make iron core forming oversimplify, reduce production costs greatly.

The present invention adopts big coil windings of petal type and corresponding stator core to achieve the above object.

According to petal type large coil winding disc electric machine of the present invention, it mainly is made up of stator, rotor, support, active wheel, the groove number of stator core significantly reduces, and winding has bigger magnetic flux area, thereby improve single-machine capacity and efficient, make iron core forming oversimplify, reduce production costs greatly.

The present invention adopts big coil windings of petal type and corresponding stator core to achieve the above object.

According to petal type large coil winding disc electric machine of the present invention, it mainly is made up of stator, rotor, support, active wheel, stator mainly comprises iron core, winding, stator case, it is characterized in that: said winding adopts the big coil windings of petal type, they are embedded in the groove of stator core, constitute full pitch and concentrate winding.

Further aspect of the present invention is: the big number of teeth of said stator is 2 times, 3 times or 4 times of rotor magnetic pole number.

According to above-mentioned petal type large coil winding disc electric machine, it is characterized in that said stator also comprises axle, said rotor and active wheel are connected as a single entity, and they rotate around said axle by bearing.

According to above-mentioned petal type large coil winding disc electric machine, it is characterized in that it comprises two stators and a rotor.

Below in conjunction with accompanying drawing the present invention is elaborated.

Fig. 1 has shown first kind of embodiment of the present invention, and it is a kind of single air gap permanent magnet alternating current generator.

Figure 1A is an outside drawing, and Figure 1B is the semi-section structural representation.

Fig. 2 has shown second kind of embodiment of the present invention, and it is an a kind of pair of air gap excitation-type alternating current generator.

Fig. 2 A is the semi-section structural representation, and Fig. 2 B is an outside drawing.

Fig. 3 is a prior art winding schematic diagram.

Fig. 4 is the big coil windings schematic diagram of single-phase petal type of the present invention.

Fig. 5 is the big coil windings schematic diagram of two-phase petal type of the present invention.

Fig. 6 is the big coil windings schematic diagram of three-phase petal type of the present invention.

Fig. 7 is the axial magnetic circuit schematic diagram of generator among Fig. 1.

Fig. 8 is the axial magnetic circuit schematic diagram of generator among Fig. 2.

Fig. 9 is stator core construction figure.

Figure 10 is a rotor structure figure.

Figure 11 is the right half part profile that utilizes hydraulic generator of the present invention.

Referring to Fig. 1, first embodiment of the present invention is single air gap permanent magnet alternating current generator.It mainly is made up of stator (1), support (2), rotor (3), active wheel (4).Present embodiment adopts cantilever support structure, and axle is fixed together with stator, and is motionless, and rotor is by the end rotation of bearing at axle.Stator (1) comprises axle (6), pad (7), iron core (8) (referring to Fig. 9), winding (9) and stator case (10), and winding (9) can adopt Fig. 4, Fig. 5 or the big coil windings of petal type shown in Figure 6.Rotor (3) comprises magnetic pole (11), yoke (12), rotor case (13) and rubber ring (15), and magnetic pole (11) is made of the fan-shaped magnet piece, and they are evenly distributed on the plate-like yoke (12) along circumference.Above-mentioned runner (4) connects as one by three screws (14) and rotor, and they can rotate around axle (6) by bearing (16).The right-hand member of axle (6) utilizes nut (17) locking.The right side of nut (7) has end cap (5) to shield.

Fig. 2 has shown second kind of embodiment of the present invention, and it is two air gap excitation-type alternating current generators.It is mainly by two stators (20,22), a rotor (21), left and right sides support (19,23), and three connecting bolts (18) are formed.On stator (20) and stator (22) structure is identical, on stator (1) structure among they and Fig. 1 also is essentially identical, different just axles (25) are not fastened on the stator (20,22), but be fastened on the rotor (21), they rotate with respect to stator by bearing (26).Rotor (21) adopts excitation-type, and it comprises wheel (30), yoke (31), excitation winding (32) and magnetic pole (33).Certainly the also available active wheel (24) that is installed in the motor outside of wheel (30) replaces.

Fig. 3 is the winding schematic diagram of prior art, can find out that therefrom its iron core fluting is many, winding complexity, difficult wiring.

Fig. 4, Fig. 5 and Fig. 6 have shown the big coil windings of petal type of the present invention under three kinds of situations, and the rotor of their correspondences is three pairs of magnetic poles.

Fig. 4 is the situation of monophase machine, and two winding coils (34,35) are embedded in 6 grooves of stator core, and therefore, stator has only 6 stator canine tooths (36), is 2 times of rotor magnetic pole logarithm (3 pairs).Respectively there are 3 petals winding coil (34) and (35), and stagger mutually, constitute full pitch and concentrate winding, so not only made full use of the iron core peripheral space, increase the magnetic flux area, can obtain higher electromotive force, but also overcome the shortcoming that traditional full pitch is concentrated winding consumption copper.Winding coil (34) differs a stator canine tooth with winding coil (35), i.e. the serial or parallel connection connected mode is adopted in 180 ° of phase phasic differences, they can be formed a single-phase winding.

This winding configuration of the present invention, any single-turn circular coil all can all act on simultaneously with the magnetic flux that all pole pairs of rotor provide.Induced electromotive force is proportional to the rate of change of this circle coil flux amount.If φ m is the magnetic flux of a pair of magnetic pole, P is the magnetic pole logarithm, and f is a frequency, and then induced electromotive force is:

E＝4.44Pfφm

Above-mentioned formula equally also is applicable to the situation of Fig. 5, Fig. 6.

Fig. 5 is the situation of two-phase induction motor, and winding coil (37) and (38) 180 ° of phasic differences mutually adopt the serial or parallel connection mode to form first winding; It also is to differ 180 ° that winding coil (39) and (40) differ, and adopts the serial or parallel connection mode to form second winding.Herein, stator has 12 stator canine tooths (41), and it is 4 times of rotor magnetic pole logarithm (3 pairs).

Fig. 6 is the three phase electric machine situation, and winding pitch of the laps (42), (43), (44) constitute A, B, C three phase windings respectively.Stator has 9 stator canine tooths (45) herein, and it is 3 times of rotor magnetic pole logarithm (3 pairs).

Fig. 7 has represented the axial magnetic circuit of generator among Fig. 1, (46) expression magnetic line of force.

Fig. 8 has represented the axial magnetic circuit of generator among Fig. 2, (47) expression magnetic line of force.

Fig. 9 is stator core construction figure, and iron core (8) only has 6 grooves, and it is applicable to monophase machine shown in Figure 4.

Figure 10 is the structure chart of used excitation-type rotor in the motor shown in Figure 2.It comprises yoke (31), in yoke (31) both sides excitation winding (32) is arranged respectively.

A kind of motor example is provided below again, is that a kind of external structure is the hydraulic generator of umbrella structure.As shown in figure 11, axial dimension is very little, so magnetic circuit is very short; Radial dimension is very big, and bigger air gap area and more number of pole-pairs can be provided, so that low speed or Ultra-Low Speed operation.Its rotor can use support (49) to reinforce, and increases mechanical strength, and be equipped with the rotor outer spin (51) in distinctive " guide groove " (50), is used for to the aiding support of rotor and guarantees air gap shape.Exciter shown in the dotted line (52) encloses in motor, and its armature is contained on the rotor, directly works as the main frame excitation by semiconductor rectifier.The magnetic field of exciter is contained on the stator, by other DC power supply excitation, and comes the exciting current of main control system with the size of this electric current.Exciter and main frame have separately independently magnetic circuit, can adopt different frequency operations.Axial ducts (53) are arranged in stator core and the rotor core.Air gap is as the radial passage.Provide great convenience owing to adopted the big coil windings of petal type, very simple, joint to can be the inner-cooled cooling less.This winding requires the groove number less, adapts to the iron core forming method of simple possible.Be single gap structure shown in the figure,,, dispose same stator, form two gap structures at the upside of rotor as if being the axis of symmetry with the rotor, but the balance unilateral magnetic force.

Describe above specific embodiments of the invention in detail, because the present invention has adopted the iron core of the big coil windings of unique petal type and sagittal plane, be equipped with short magnetic circuit and littler parts, and the generator of the single air gap of simple explained hereafter, two air gaps, raw-material utilization rate be can greatly improve, single-machine capacity and efficient increased substantially. Single gap structure particularly, for electromechanical integration provides great convenience because stator, rotor can be divided into separately independently two partly from air gap, when electromechanics in conjunction with the time, can realize the machinery-free frictional drive. Because the present invention adopts the less stator canine tooth of plane air gap, number, narrower notch, generator can reduce the disturbance of main field when operation, again because the axis of armature field always is parallel to the axis of main field, alleviated the distortion of the main field that causes because of armature-reaction, so to improving the electromotive force quality positive effect is arranged. Because the present invention opened up radial space, be convenient to heat radiation, for the manufacturing of multi-stage low-speed power generator and large-size machine provides convenience. The present invention adopts big coil, and bigger magnetic flux area is arranged, and under the same conditions, can obtain higher induced electromotive force, so improved the utilization of copper. This winding not only conveniently rolls off the production line, easily insulation, and enough mechanical strengths and dielectric strength are arranged again. Therefore, the present invention has very outstanding effect.

Claims (6)

1, a kind of petal type large coil winding disc electric machine, it mainly is made up of stator (1), rotor (3), support (2), active wheel (4), stator mainly comprises iron core (8), winding (9), stator case (10), it is characterized in that: said winding (9) adopts the big coil windings of petal type (34,35,37,38,39,40,42,43,44), they are embedded in the groove of said iron core (8), constitute full pitch and concentrate winding.

2, according to the described petal type large coil winding disc electric machine of claim 1, the big number of teeth that it is characterized in that said stator is 2 times of rotor magnetic pole logarithm.

3, according to the described petal type large coil winding disc electric machine of claim 1, the big number of teeth that it is characterized in that said stator is 3 times of rotor magnetic pole logarithm.

4, according to the described petal type large coil winding disc electric machine of claim 1, the big number of teeth that it is characterized in that said stator is 4 times of rotor magnetic pole logarithm.

5, according to the described petal type large coil winding disc electric machine of claim 1～4, it is characterized in that said stator also comprises axle (6), said rotor (3) is connected as a single entity with active wheel (4), and they rotate around axle (6) by bearing (16).

6,, it is characterized in that it comprises two stators (20,22), a rotor (21) according to the described petal type large coil winding disc electric machine of claim 1～4.

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