CN212063647U

CN212063647U - Low-temp. permanent-magnet three-phase ac generator

Info

Publication number: CN212063647U
Application number: CN202020868349.8U
Authority: CN
Inventors: 李亚兵
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-21
Filing date: 2020-05-21
Publication date: 2020-12-01
Anticipated expiration: 2030-05-21

Abstract

The utility model provides a novel low-temperature permanent magnet three-phase alternating current generator, belonging to the technical field of generators, comprising a stator and a rotor, wherein the stator is provided with a central hole; 48n pole shoe grooves are uniformly distributed on the hole wall of the central hole, the same phase line comprises 8n coils, and the current directions of adjacent sides of two adjacent coils of the same phase line are the same; the rotor is rotationally connected in the central hole; install N utmost point magnet and S utmost point magnet on the rotor inner race in order, N utmost point magnet and S utmost point magnet are 4N, the utility model provides a novel low temperature permanent magnetism three-phase alternator, during two adjacent solenoid cutting magnetic lines of force of same phase line, because both current direction are opposite, and the produced magnetic field direction of N utmost point magnet and S utmost point magnet that correspond is also opposite, consequently it is close to "0" magnetic field to make between two adjacent solenoid of same phase line, the required magnetic resistance of overcoming of generator reduces, and then the temperature rise that makes the generator is less, play the effect of protection generator device-permanent magnet, improved life.

Description

Low-temp. permanent-magnet three-phase ac generator

Technical Field

The utility model belongs to the technical field of the generator, more specifically say, relate to a novel low temperature permanent magnetism three-phase alternator.

Background

The generator generates electricity by adopting a mode of cutting magnetic lines by wires, the number of the wires cutting the magnetic lines at each time is increased by adopting a winding mode generally in order to improve the efficiency, so that generation current with larger magnitude and more continuity is formed, the conductor in a magnetic field is electrified and then can be subjected to the reaction action of the magnetic field, namely, the conductor current generates a reverse magnetic field, the resistance is larger, the eddy current is increased, the temperature rise is obvious, and then the demagnetization of a permanent magnet is caused, and the generation efficiency is reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a novel low temperature permanent magnetism three-phase alternator to solve the generator temperature rise that exists among the prior art very fast, reduced life's technical problem.

In order to achieve the above object, the utility model adopts the following technical scheme: provided is a novel low-temperature permanent magnet three-phase AC generator, including:

a stator having a central bore; 48n pole shoe grooves are uniformly distributed on the hole wall of the central hole, the same phase line comprises 4n coils, and the current directions of two adjacent coils of the same phase line are opposite;

the rotor is rotatably connected in the central hole; and an N-pole magnet and an S-pole magnet are sequentially arranged on the inner ring of the rotor, and the number of the N-pole magnet and the number of the S-pole magnet are 4N.

As another embodiment of the present application, the same winding span of the coil is 4n pole shoe grooves.

As another embodiment of this application, overlap setting between two adjacent solenoid of different phase lines.

As another embodiment of the present application, the number of the pole shoe grooves is 24, and the number of the N-pole magnet and the number of the S-pole magnet are 2.

As another embodiment of the present application, the number of the pole shoe grooves is 36, and the number of the N-pole magnet and the number of the S-pole magnet are 3.

As another embodiment of the present application, the number of the pole shoe grooves is 48, and the number of the N-pole magnet and the number of the S-pole magnet are 4.

As another embodiment of the present application, the number of the pole shoe grooves is 72, and the number of the N-pole magnet and the number of the S-pole magnet are both 6.

As another embodiment of the present application, the pole shoe grooves are T-shaped grooves.

The utility model provides a novel low temperature permanent magnetism three-phase alternator's beneficial effect lies in: compared with the prior art, the low-temperature permanent magnet three-phase alternating current generator drives the rotor to rotate, so that a magnetic field generated by the N-pole magnet and the S-pole magnet in the rotor is changed on the stator coil, and the coil cuts a magnetic line of force to generate current; when two adjacent coils of the same phase line cut magnetic lines of force, because the current directions of the two adjacent coils are opposite, and the directions of magnetic fields generated by the corresponding N-pole magnet and S-pole magnet are also opposite, a resistance magnetic field does not exist between the two adjacent coils of the same phase line, so that the magnetic resistance required to be overcome by the generator is reduced, the temperature rise of the generator is smaller, the effect of protecting a generator device-permanent magnet is achieved, and the service life is prolonged.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a stator and a rotor provided by an embodiment of the present invention;

fig. 2 is a first schematic diagram of the novel low-temperature permanent-magnet three-phase ac generator labeled with three-phase power according to an embodiment of the present invention;

fig. 3 is a schematic view illustrating an operation analysis of the novel low-temperature permanent-magnet three-phase ac generator according to an embodiment of the present invention;

fig. 4 is a schematic connection diagram of a stator and a rotor according to an embodiment of the present invention;

fig. 5 is a schematic diagram two of the novel low-temperature permanent-magnet three-phase ac generator labeled with three-phase power provided by the embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

1. a stator; 11. a central bore; 12. a pole shoe groove; 13. a coil; 2. a rotor; 21. an N-pole magnet; 22. an S-pole magnet; 3. a magnetic field vacuum region.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1 to 5, a novel low-temperature permanent-magnet three-phase ac generator according to the present invention will now be described. A novel low-temperature permanent magnet three-phase alternating current generator comprises a stator 1 and a rotor 2, wherein the stator 1 is provided with a central hole 11; 48n pole shoe grooves 12 are uniformly distributed on the hole wall of the central hole 11, the same phase line 13 comprises 8n lines 13, and the winding directions of two adjacent lines 13 of the same phase line are opposite; the rotor 2 is rotatably connected in the central hole 11; n-pole magnets 21 and S-pole magnets 22 are sequentially mounted on the inner ring of the rotor 2, and the number of the N-pole magnets 21 and the number of the S-pole magnets 22 are 4N.

Compared with the prior art, the novel low-temperature permanent magnet three-phase alternating current generator provided by the utility model drives the rotor 2 to rotate, so that the magnetic field generated by the N-pole magnet 21 and the S-pole magnet 22 in the rotor 2 is changed on the coil 13 of the stator 1, and the coil 13 cuts the magnetic force line to generate current; when two adjacent coils 13 of the same phase line cut magnetic lines, because opposite induced magnetic fields generated by currents in the same direction of the two adjacent coils are mutually offset, and the directions of the magnetic fields generated by the corresponding N-pole magnet 21 and the S-pole magnet 22 are also opposite, a reverse magnetic field does not exist between the two adjacent coils 13 of the same phase line, so that the magnetic resistance required to be overcome by the generator is reduced, the eddy current of the iron core is reduced, the temperature rise of the generator is smaller, the effect of protecting a generator device-permanent magnet is achieved, and the service life is prolonged.

Because the current of two adjacent coils 13 of the same phase line is in the same direction, the size current magnetic field offset of the area is nearly 0, and no magnetic resistance exists in the section with the strongest magnetic field intensity of the magnet (the magnetic field vacuum area 3), so that the overall magnetic resistance is reduced, and meanwhile, the magnetic field intensity approaches to '0' in the middle of the two coils 13 (the magnetic field vacuum area 3), so that the minimum temperature rise of the iron core eddy current is minimum. And so on: the current of two adjacent coils 13 of the same phase line is in the same direction, the magnetic field directions are opposite, the magnitudes are equal and offset, and the two coils are all areas where the magnetic field approaches to 0, so that the temperature rise is reduced. Each phase of each group is the same, so the temperature rise is low, the magnetic resistance is small, the magnet is not easy to demagnetize, and the service life is long. This application develops the model machine to test, the temperature actual measurement of generator is less than 60 degrees.

The terminals, U, U, identified in figure 2 as three coils 13₀Two ends of phase A, V, V₀Two ends of phase B, W, W₀The two ends of the C phase are shown. Fig. 2 is a schematic diagram of parallel connection of coils, and fig. 5 is a schematic diagram of series connection of coils.

In fig. 1 to 5, N is 4, that is, 48 pole shoe grooves 12 and 4N-pole magnets 21 and 4S-pole magnets 22 are provided. Every solenoid span of winding in the pole shoe groove is 4 pole shoe grooves, and the interval is two pole shoe grooves between the adjacent solenoid, and the solenoid that S, N pole magnets of every group magnetic pole correspond is cutting the magnetic line of force simultaneously to there is not adverse current in opposite direction of winding of both, and the temperature rise of generating electricity is not obvious, is favorable to protecting the permanent magnet of generator, realizes the long-life use of generator. n is an integer of 1 or more, or n is 1/2.

The first coil of the U-phase line shown in fig. 2 is wound in the first to fourth pole shoe grooves, the second coil is wound in the pole shoe grooves of the 10 th and 7 th coils, the winding directions of the adjacent first and second coils are opposite, one is clockwise and the other is counterclockwise, a gap is formed between the first and second coils by means of the two pole shoe grooves spaced between the coils, so that the two coils respectively correspond to the magnetic poles opposite in the upper direction of the rotor, thereby obtaining opposite magnetic force line directions (i.e. opposite magnetic field directions), the current directions of the adjacent two coils are consistent according to lenz's law, the magnetic field cancellation therebetween is approximately ' 0 ', each complete set of magnets having S, N magnetic poles corresponds to 12 pole shoe grooves because the number of the pole shoe grooves on the stator is 6 times that of the magnetic poles on the rotor, as shown in fig. 4, because of the pole shoe grooves are uniformly distributed, the first coil is wound with 1, b, The 4 pole shoe groove just strides half width of S utmost point magnet, and S utmost point magnet just does not get into the position that the second package was located.

With the continuous rotation of the rotor, the width of the S-pole magnet corresponding to the first coil pack is gradually reduced, the N-pole magnet is gradually increased, namely the number of the magnetic lines of force passing through the first coil pack from inside to outside is gradually reduced, the number of the magnetic lines of force passing through the first coil pack from outside to inside is gradually increased, and the current of the first coil pack is gradually reversed along with the reversal of the magnetic field; the width of the N pole magnet corresponding to the second coil is gradually reduced, the S pole magnet is gradually increased, namely the number of the magnetic lines passing through the first coil from outside to inside is gradually reduced, the number of the magnetic lines passing through the first coil from inside to outside is gradually increased, and the current of the second coil is gradually reversed along with the reversal of the magnetic field; since two pole shoe grooves 12 are spaced between two adjacent coils 13 in the same phase by a distance of half the width of the magnetic pole, so that the magnetic pole and the coils 13 are matched with each other, each coil 13 has 1/4 cycles (half the S-pole magnet 22 or half the N-pole magnet 21) at the rear end of the magnetic pole, and therefore, the magnetic resistance force on the winding is reduced by the direction of the magnetic force line of the magnetic field and the direction of the current in the coil at that time, and the 1/4 cycle lasts.

Referring to fig. 1 to 3, as an embodiment of the novel low-temperature permanent-magnet three-phase ac generator provided by the present invention, the winding span of the same coil 13 is 4n pole shoe grooves 12, that is, compared with winding the same pole shoe groove 12, the coil radial size of the coil 13 is increased, so that the magnetic flux passed by the same coil 13 is increased.

Referring to fig. 1 and fig. 2, as a specific embodiment of the novel low-temperature permanent-magnet three-phase ac generator provided by the present invention, two adjacent coils 13 of different phase lines are overlapped, and the coils 13 of three phase lines are overlapped in a certain pole shoe groove 12 when being wound, so that the radial size of the coils 13 in each phase line is increased without increasing the size of the stator 1, and further, the magnetic flux passing through each coil 13 is increased. This way, when winding the coils in the pack 13, it is necessary to wind the phases in order from the inside outwards. The overlapping of one pole shoe groove 12 is arranged, so that the interference degree between two adjacent phase lines is small, and the installation and winding are convenient.

Referring to fig. 1 to 5, as a specific embodiment of the novel low-temperature permanent-magnet three-phase ac generator of the present invention, there are 24 pole shoe slots 12, and 2N-pole magnets 21 and 2S-pole magnets 22. The 24 pole shoe grooves 12 are uniformly distributed on the hole wall of the central hole 11, and are provided with two N-pole magnets 21 and two S-pole magnets 22, the two N-pole magnets 21 are oppositely arranged, the two S-pole magnets 22 are oppositely arranged, and the two N-pole magnets 21 and the two S-pole magnets 22 form an annular structure.

Please refer to fig. 1 to 5, as a specific embodiment of the novel low-temperature permanent magnet three-phase ac generator provided by the present invention, the pole shoe grooves 12 are 36, the N-pole magnets 21 and the S-pole magnets 22 are 3, the 36 pole shoe grooves 12 are uniformly distributed on the hole wall of the central hole 11, and are provided with three N-pole magnets 21 and three S-pole magnets 22, the three N-pole magnets 21 are relatively arranged, the three S-pole magnets 22 are relatively arranged, and the three N-pole magnets 21 and the three S-pole magnets 22 form an annular structure.

Please refer to fig. 1 to 5, as a specific embodiment of the novel low-temperature permanent magnet three-phase ac generator provided by the present invention, the number of the pole shoe grooves 12 is 48, the number of the N-pole magnets 21 and the number of the S-pole magnets 22 are 4, the 48 pole shoe grooves 12 are uniformly distributed on the hole wall of the central hole 11, and four N-pole magnets 21 and four S-pole magnets 22 are arranged, the four N-pole magnets 21 are arranged relatively, the four S-pole magnets 22 are arranged relatively, and the four N-pole magnets 21 and the four S-pole magnets 22 form an annular structure.

Please refer to fig. 1 to 5, as a specific implementation manner of the novel low-temperature permanent magnet three-phase ac generator provided by the present invention, the pole shoe grooves 12 are 72, the N-pole magnets 21 and the S-pole magnets 22 are 6, the 72 pole shoe grooves 12 are uniformly distributed on the hole wall of the central hole 11, and six N-pole magnets 21 and six S-pole magnets 22 are arranged, the six N-pole magnets 21 are arranged relatively, the six S-pole magnets 22 are arranged relatively, and the six N-pole magnets 21 and the six S-pole magnets 22 form an annular structure.

Please refer to fig. 1 and 4, as the utility model provides a specific implementation of the novel low temperature permanent magnet three-phase ac generator, pole shoe groove 12 is T-shaped groove, the size of the intercommunication department of this pole shoe groove 12 and centre bore 11 is less than the notch of pole shoe groove 12, namely, pole shoe groove 12 is close to being equipped with the bellying of extending in opposite directions on the double-phase opposite side wall of centre bore 11, make pole shoe groove 12 form T-shaped groove, solenoid 13 twines and is spacing by two bellying to solenoid 13 that is located T-shaped inslot when two T-shaped inslots, it is higher to make each solenoid 13 twine and install stability in stator 1, the reliability of this novel low temperature permanent magnet three-phase ac generator has been improved.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. Novel low temperature permanent magnetism three-phase alternator, its characterized in that includes:

a stator having a central bore; 48n pole shoe grooves are uniformly distributed in the hole wall of the central hole, the same phase line comprises 8n coils, and the current directions of two adjacent coils of the same phase line are opposite;

the rotor is rotatably connected in the central hole; an N-pole magnet and an S-pole magnet are sequentially arranged on the inner ring of the rotor, and the number of the N-pole magnet and the number of the S-pole magnet are 4N; n is an integer of 1 or more, or n is 1/2.

2. The new low temperature permanent magnet three phase alternator of claim 1 wherein the same said coil winding span is 4n pole shoe slots.

3. The new cryogenic permanent magnet three-phase alternator of claim 2 in which adjacent two of said coils of different phase lines are disposed in overlapping relationship.

4. The new low temperature permanent magnet three phase alternator of claim 1 wherein there are 24 pole shoe slots and 2 for each of said N pole magnets and said S pole magnets.

5. The new low temperature permanent magnet three phase alternator of claim 1, wherein there are 48 pole shoe slots and 4N and S pole magnets.

6. The new low temperature permanent magnet three phase alternator of claim 1 wherein the pole shoe slots are T-slots.