CN219145217U

CN219145217U - Self-excitation synchronous generator

Info

Publication number: CN219145217U
Application number: CN202320250492.4U
Authority: CN
Inventors: 张新栋; 李光友; 段瑞伟; 郭占林; 林宁宁
Original assignee: SHANDONG JINGJIU TECHNOLOGY CO LTD
Current assignee: SHANDONG JINGJIU TECHNOLOGY CO LTD
Priority date: 2023-02-16
Filing date: 2023-02-16
Publication date: 2023-06-06
Anticipated expiration: 2033-02-16

Abstract

The utility model relates to the technical field of generators, in particular to a self-excitation synchronous generator, which comprises an electronic voltage stabilizing regulator, a rectifier bridge, a rear end cover, a stator, a rotor, a front end cover and a belt pulley, and is characterized in that: the stator comprises a shell, a stator iron core and an armature winding; the prime motor drives the rotor to rotate through the belt pulley, and the device can realize continuous control of the magnetic field by adjusting exciting current. The generator can reliably self-excite, the air-gap field of the generator after excitation is established by exciting current and the permanent magnet, the existence of the permanent magnet strengthens the air-gap field of the generator, and the exciting current can be reduced under the condition of certain required magnetic field.

Description

Self-excitation synchronous generator

Technical Field

The utility model relates to the technical field of generators, in particular to a self-excitation synchronous generator.

Background

There are two general methods for starting a self-starting generator: one is to use the remanence of the pole core material. This method is simple but unreliable. When the generator is stopped for a long time, the residual magnetism of the iron core can slowly disappear, the generator cannot be excited again, and the iron core material must be magnetized. In particular, for a rectified output generator, excitation is generally not possible due to the residual magnetic voltage alone, due to the rectifier diode and the voltage drop across the excitation regulator. The second is to place permanent magnets on the poles and to excite the motor by using the magnetic field generated by the permanent magnets. However, the presence of permanent magnets in the prior art solutions tends to adversely affect the main magnetic circuit, reducing the performance of the generator.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide a self-excitation synchronous generator, wherein a permanent magnet provides a reliable excitation field, and the excitation field is enhanced by the permanent magnet after excitation.

The utility model adopts the following technical scheme to realize the aim of the utility model:

the utility model provides a from synchronous generator that starts, includes electron steady voltage regulator, rectifier bridge, rear end cap, stator, rotor, front end housing and belt pulley, its characterized in that: the stator comprises a shell, a stator iron core and an armature winding;

further, the prime motor drives the rotor to rotate through the belt pulley, and the prime motor is a gasoline engine or a diesel engine.

The rotor comprises a rotating shaft, a rotor core, an excitation winding, a permanent magnet and a magnetic conduction block;

the rotor core includes a rotor pole body, a rotor pole shoe, and a rotor pole yoke.

As a further limitation of the technical scheme, the armature winding is a three-phase double-layer short-distance winding.

As a further limitation of the present technical solution, the permanent magnets and the magnetically permeable blocks are located between the rotor pole shoes.

As a further limitation of the technical scheme, the permanent magnets and the magnetic conductive blocks are in a plurality of groups, each group of permanent magnets is a pair, and a magnetic conductive block is arranged between the pair of permanent magnets.

As a further limitation of the present technical solution, the permanent magnets are magnetized tangentially, each pair of the permanent magnets and the magnetic conducting block between each pair of the permanent magnets form one magnetic pole, and the remanence of the permanent magnets creates an excitation field.

As a further limitation of the technical scheme, the magnetic fields established by the permanent magnets are alternately distributed in N, S.

Compared with the prior art, the utility model has the advantages and positive effects that: the generator can reliably self-excite, the air-gap field of the generator after excitation is established by exciting current and the permanent magnet, the existence of the permanent magnet strengthens the air-gap field of the generator, and the exciting current can be reduced under the condition of certain required magnetic field.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. It is evident that the drawings in the following description are only some embodiments of the present utility model and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art. In the drawings:

fig. 1 is a schematic structural diagram of a synchronous generator of a self-excited convex machine.

Fig. 2 is a graph showing the magnetic field distribution generated by the permanent magnet of the present utility model.

Fig. 3 is a graph showing the resultant magnetic field pattern generated by the field current and the permanent magnet of the present utility model.

Fig. 4 is a structural diagram of the present utility model.

In the figure: 1. the electronic voltage stabilizing controller comprises 2 parts of a rectifier bridge, 3 parts of a rear end cover, 4 parts of a stator, 5 parts of a rotor, 6 parts of a front end cover, 7 parts of a belt pulley, 41 parts of a shell, 42 parts of a stator core, 43 parts of an armature winding, 51 parts of a rotor pole yoke, 52 parts of a rotor pole body, 53 parts of a rotating shaft, 54 parts of a magnetic conduction block, 55 parts of a rotor pole shoe, 56 parts of a rotor pole shoe, permanent magnet, 57 parts of a permanent magnet and an excitation winding.

Detailed Description

The technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to fig. 1 to 4 of the embodiments of the present utility model, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, in the embodiments of the present utility model, terms such as left, right, up, down, front, and back are merely relative terms or references to a normal use state of a product, i.e. a traveling direction of the product, and should not be construed as limiting.

When an element is referred to as being "on" or "disposed on" another element, it can be on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.

Examples: including electron steady voltage regulator 1, rectifier bridge 2, rear end cap 3, stator 4, rotor 5, front end housing 6 and belt pulley 7, its characterized in that: the stator 4 includes a housing 41, a stator core 42, and an armature winding 43;

the rotor 5 comprises a rotating shaft 53, a rotor core, an exciting winding 57, a permanent magnet 56 and a magnetic conduction block 54;

the rotor core includes a rotor pole body 52, rotor pole pieces 55, and a rotor pole yoke 51.

The armature winding 43 is a three-phase double-layer short-distance winding.

The permanent magnets 56 and the magnetically permeable blocks 54 are located between the rotor pole pieces 55.

The permanent magnets 56 and the magnetic conductive blocks 54 are in a plurality of groups, each group of permanent magnets 56 is a pair, and one magnetic conductive block 54 is arranged between the pair of permanent magnets 56.

The permanent magnets 56 are magnetized tangentially, each pair of the permanent magnets 56 and the magnetically permeable block 54 between each pair of the permanent magnets 56 form a pole, and the remanence of the permanent magnets 56 creates an excitation field.

The magnetic fields established by the permanent magnets 56 are alternately distributed in N, S.

The rated power of the self-excitation salient pole synchronous generator is 6kW, the outer diameter of the stator core 42 is 170mm, the inner diameter of the stator core is 120mm, and the core length of the stator core is 100mm.

Wherein, rotor core external diameter 119mm, internal diameter 25mm, core length 100mm,8 poles.

Wherein the cross-section of the permanent magnet 56 is 3×5mm in size and the number is 2 times the number of poles.

The principle of polar arrangement of the permanent magnets 56 is as follows: the same polarity at the same pole is opposite, namely N, N or S, S, and the alternating magnetic fields of N, S are formed when the stator is seen from the side at different poles.

Wherein, the section size of the magnetic conduction block 54 is 7×5mm, and the number is the same as the number of poles.

When the permanent magnets 56 and the magnetic conductive blocks 54 are all arranged between the rotor pole shoes 55, the magnetic field generated by the permanent magnets is shown in fig. 2, the number of poles of the magnetic field is the same as that of the generator, after the prime mover is started, the rotor 5 of the generator is driven to rotate by a belt, the magnetic field generated by the permanent magnets 56 cuts the armature winding 43 to generate induced electromotive force, the excitation winding 57 is supplied with power after rectification, the excitation is completed by providing initial excitation current, and the excitation regulator controls the excitation current after excitation, so that the output voltage is ensured to be stable in a required range.

After the generator is excited, the air-gap field of the generator is established by the exciting current and the permanent magnet 56 together, as shown in fig. 3, the existence of the permanent magnet 56 can strengthen the air-gap field of the generator, and the exciting current can be reduced on the premise of a certain magnetic field requirement.

The above disclosure is merely illustrative of specific embodiments of the present utility model, but the present utility model is not limited thereto, and any variations that can be considered by those skilled in the art should fall within the scope of the present utility model.

Claims

1. The utility model provides a synchronous generator from starting excitation, includes electron steady voltage regulator (1), rectifier bridge (2), rear end cap (3), stator (4), rotor (5), front end housing (6) and belt pulley (7), its characterized in that: the stator (4) comprises a shell (41), a stator core (42) and an armature winding (43);

the rotor (5) comprises a rotating shaft (53), a rotor core, an excitation winding (57), a permanent magnet (56) and a magnetic conduction block (54);

the rotor core includes a rotor pole body (52), a rotor pole shoe (55), and a rotor pole yoke (51).

2. A self-starting synchronous generator as defined in claim 1, wherein: the armature winding (43) is a three-phase double-layer short-distance winding.

3. A self-starting synchronous generator as defined in claim 1, wherein: the permanent magnets (56) and the magnetic conductive blocks (54) are positioned between rotor pole shoes (55).

4. A self-starting synchronous generator as defined in claim 3, wherein: the permanent magnets (56) and the magnetic conductive blocks (54) are divided into a plurality of groups, each group of permanent magnets (56) is a pair, and one magnetic conductive block (54) is arranged between the pair of permanent magnets (56).

5. The self-starting synchronous generator of claim 4, wherein: the permanent magnets (56) are magnetized tangentially, each pair of permanent magnets (56) and the magnetically permeable block (54) between each pair of permanent magnets (56) form a magnetic pole, and the remanence of the permanent magnets (56) creates an excitation field.

6. The self-starting synchronous generator of claim 5, wherein: the magnetic fields established by the permanent magnets (56) are alternately distributed in N, S.