TW201929384A - Hybrid excitation claw pole generator maintaining the constant voltage adjustment function of the excitation coil and increasing the power generation capacity and efficiency - Google Patents

Abstract

The present invention discloses a hybrid excitation claw pole generator comprising a rotor and a stator core disposed on an outer peripheral side of the rotor. The rotor includes a permanent magnetic pole portion, an excitation coil, a rotor shaft, and a collective ring. The stator core includes a plurality of stacked silicon steel sheets and at least one coil wound around each of the silicon steel sheets. The characteristic lies in that the permanent magnetic pole portion is composed of a first and second claw-shaped magnetic pole members engaging with each other. The first and second claw-shaped magnetic pole members have a plurality of claw-shaped bodies, and the outer peripheral surface of each claw-shaped body is provided with at least one permanent magnet. With the combination of the above components, the benefit of the hybrid excitation can be achieved in the implementation, and in addition to maintaining the constant voltage adjustment function of the excitation coil, the power generation capacity and efficiency can be increased.

Description

Hybrid excitation claw pole generator

The invention relates to the technical field of a generator-related equipment, in particular to an improved structure of a magnetic pole portion of a generator. In addition to maintaining a constant voltage adjustment function of an excitation coil, the hybrid excitation claw pole can increase power generation and efficiency. generator.

The alternator is a power generation device that uses the magnetic field between the rotor and the stator core to generate electromagnetic interactions to generate alternating current power.

Known about the alternator technology, the specific implementation of which is disclosed in the previous cases such as China Patent Bulletin No. I408870, which is roughly composed of a rotor and a stator core provided on the outer peripheral side of the rotor (other power control and other components are briefly described) ; Among them, the rotor can rotate relative to the stator core. The rotor includes a permanent magnetic pole part (first and two claw-shaped magnetic pole pieces), an exciting coil, a rotor shaft, and a slip ring. The stator core includes a plurality of stacked silicon steel sheets, and at least one coil wound around each of the silicon steel sheets.

During the implementation, the axial magnetic flux is generated by transmitting the exciting current to the exciting coil through the collector ring, and the first claw-shaped magnetic pole piece is magnetized to N pole, and the second claw-shaped magnetic pole piece is magnetized to S pole, thereby forming multiple For magnetic poles that are interlaced, and when the rotor rotates, a rotating magnetic field is formed.

When the rotor rotates relative to the stator core, Faraday's law of electromagnetic induction will make the stator core The outer coil generates voltage due to electromagnetic induction. It can be known from the above that the stronger the magnetic field generated between the first and second claw-shaped magnetic pole pieces of the rotor relative to the stator core, the greater the voltage and current that the generator can generate.

However, it is known that when the magnetizing coil (the first and the two claw-shaped magnetic pole pieces) is magnetized after the exciting coil passes the exciting current into the rotor of the generator, the coil outside the stator core will generate a voltage due to electromagnetic induction, but this type of electromagnet The magnetic field generated is far smaller than the magnetic field generated by modern rare-earth permanent magnets, such as neodymium-boron or samarium cobalt. Even if the excitation current is increased to generate a larger magnetic field, the wire diameter or The number of coil turns also makes the volume of the entire generator larger, which does not meet the actual requirements.

In view of the problems and shortcomings of the above-mentioned conventional techniques, the purpose of this creation is to improve the magnetic flux of the magnetic poles (the first and second claw-shaped magnetic pole pieces) through the design of the structure and the design of the hybrid electric excitation and permanent magnets to overcome the conventional problems. Know the lack of structure, and retain the structure of the exciting coil, so as to adjust the size of the exciting current to achieve the effect that the generator can maintain a constant voltage under various loads.

In order to achieve the above object, the present invention proposes a hybrid excitation claw pole generator, which includes a rotor and a stator core provided on the outer peripheral side of the rotor. The rotor includes a permanent magnetic pole portion, an exciting coil, a rotor shaft, and a slip ring. The stator core includes a plurality of stacked silicon steel sheets and at least one coil wound around each silicon steel sheet. It is characterized in that the permanent magnetic pole part is composed of first and two claw-shaped magnetic pole pieces engaged with each other, the first and two claw-shaped magnetic pole pieces have a plurality of claw-shaped bodies, and each claw-shaped outer peripheral surface is respectively provided with at least A permanent magnet. With the composition of the above components, the benefits of hybrid excitation can be achieved during implementation. In addition to maintaining the constant voltage adjustment function of the excitation coil, it can also increase power generation and efficiency.

1‧‧‧ rotor

12‧‧‧ Permanent Magnetic Pole

122‧‧‧The first claw-shaped magnetic pole piece

124‧‧‧Second claw-shaped magnetic pole piece

1221, 1241 ‧ ‧ ‧ claws

14‧‧‧excitation coil

16‧‧‧rotor shaft

18‧‧‧collector ring

2‧‧‧ stator core

24‧‧‧ Coil

32, 34‧‧‧ inlay

4‧‧‧ Permanent Magnet

FIG. 1 is an exploded perspective view of an embodiment of the present invention.

Fig. 2 is a schematic diagram (1) of the embodiment of the permanent magnetic pole part in the present case.

Fig. 3 is a schematic diagram of the embodiment of the permanent magnetic pole part (2).

Fig. 4 is a schematic diagram of the partial components of the embodiment shown in Fig. 1.

Hereinafter, embodiments of the hybrid field claw pole generator of the present invention will be further described with reference to related drawings. In order to facilitate understanding of the embodiments of the present invention, the same components are denoted by the same symbols in the following description.

Please refer to FIG. 1 to FIG. 4. The hybrid field claw pole generator of the present invention includes a rotor 1 and a stator core 2 provided on the outer peripheral side of the rotor 1. The rotor 1 includes a permanent magnetic pole portion 12, An exciting coil 14 accommodated in the permanent magnetic pole portion 12, a rotor shaft 16 penetrating and interlocking the permanent magnetic pole portion 12 and the exciting coil 14, and a set outside the rotor shaft 16 and electrically connected to the exciting coil 14 Of the slip ring 18. During the implementation, the permanent magnetic pole part 12 is composed of the first and two claw-shaped magnetic pole pieces 122 and 124 interlocking with each other, and the claw-shaped bodies 1221 and 1241 of the first and two claw-shaped magnetic pole pieces 122 and 124 are paired with each other. Adjacent and spaced.

The stator core 2 includes a plurality of stacked silicon steel sheets and at least one coil 24 wound around each silicon steel sheet. During implementation, the thickness of the silicon steel sheet is less than 0.5mm.

The permanent magnetic pole portion 12 is characterized in that each of the claw-shaped bodies 1221 and 1241 of the first and two claw-shaped magnetic pole pieces 122 and 124 is provided with at least one embedded groove 32 and 34 on the outer peripheral surface, respectively. During implementation, the cavities 32, 34 is geometrically contoured along the extension direction, such as a long rectangle (as in Fig. 2), a trapezoid (as in Fig. 3) or a triangle. In addition, the cross section of the embedded grooves 32 and 34 may be a groove or a dovetail groove.

The plurality of permanent magnets 4 are arranged corresponding to the cavities 32 and 34 (as shown in FIG. 4), so as to match the benefits of the mixed excitation of the exciting coil 14. During implementation, the outer contour of each permanent magnetic coil 4 is geometric, such as trapezoid, long rectangle or triangle, and can be matched with the slot 32, 34, so that the permanent magnetic coil 4 has an oblique angle, which can effectively eliminate the excitation vibration (Moment).

Therefore, the above is an introduction to the components and assembly methods of the hybrid excitation claw pole generator provided by a preferred embodiment of the present invention. The operating characteristics of the embodiment of the present invention are described below.

When the excitation coil 14 of the rotor 1 is energized, the first claw-shaped magnetic pole piece 122 is magnetized to N pole due to electromagnetic induction, and the second claw-shaped magnetic pole piece 124 is magnetized to S pole; thus, each pair of adjacent ones forms N The surface of the claw-shaped body 1221 of the first claw-shaped magnetic pole piece 122 of the pole emits magnetic lines of force into the stator core 2 and then returns to the surface of the claw-shaped body 1241 of the second claw-shaped magnetic pole piece 124 forming the S pole. Magnetic field lines are generated between the rotor 1 and the magnetic field between the stator core 2 and the rotor 1.

Cooperating with the permanent magnets 4, when the exciting coil 14 of the rotor 1 is energized and a magnetic field is formed between the surfaces of the pairs of claws 1221 and 1241 corresponding to the stator core 2, a permanent set is provided on the surfaces of the pairs of claws 1221 and 1241. The magnet 4 can greatly increase the passage of magnetic force lines of each claw-shaped body 1221, 1241 to enhance the magnetic field between the stator core 2 and the rotor 1, and further increase the power generation and efficiency of the generator.

The above description is only a preferred embodiment of the present invention, and is intended to clarify the features of the present invention, and is not intended to limit the scope of the embodiments of the present invention. Those skilled in the art will make equal changes based on the present invention. Changes, as well as changes well known to those skilled in the art, should still fall within the scope of the present invention.

Claims (8)

A hybrid excitation claw pole generator includes a rotor and a stator core provided on an outer peripheral side of the rotor, wherein the rotor includes a permanent magnet pole portion, and a permanent magnet pole portion is accommodated in the permanent magnet pole portion, and the permanent magnet pole is accommodated in the permanent magnet pole portion. A magnetizing excitation coil, a rotor shaft penetrating and interlocking the permanent magnetic pole part and the excitation coil, and a set of slip rings connected to the outer peripheral side of the rotor shaft and electrically connected to the excitation coil; the stator core, The utility model comprises a plurality of stacked silicon steel sheets and at least one coil wound around each of the silicon steel sheets. The feature is that the permanent magnetic pole part is composed of a first and two claw-shaped magnetic pole pieces engaged with each other. The two claw-shaped magnetic pole pieces have a plurality of claw-shaped bodies, and each of the claw-shaped bodies is adjacent to each other in a pair and spaced apart, and each claw-shaped outer peripheral surface is respectively provided with at least one permanent magnet. The hybrid excitation claw pole generator according to item 1 of the scope of the patent application, wherein each of the claw-shaped outer peripheral surfaces of the first and two claw-shaped magnetic pole pieces has an embedded groove to provide the permanent magnet arrangement. According to the hybrid excitation claw pole generator described in item 2 of the scope of patent application, the cross section of the recessed groove may be a groove or a dovetail groove. The hybrid excitation claw pole generator according to any one of claims 2 to 3 in the patent application scope, wherein the outline of the recessed groove along the extension direction is geometrical. The hybrid excitation claw pole generator as described in item 4 of the scope of the patent application, wherein the groove has a geometric shape along the extension direction and is selected from a trapezoid, a long rectangle or a triangle. The hybrid excitation claw pole generator as described in item 4 of the patent application scope, wherein the The outline of the permanent magnet is geometric. The hybrid claw pole generator described in item 4 of the scope of patent application, wherein the thickness of each silicon steel sheet is less than 0.5 mm. The hybrid excitation claw pole generator as described in any one of claims 1 to 3, wherein the thickness of each silicon steel sheet is less than 0.5 mm.