KR101472056B1 - Brushless synchronous generator having flat exciter - Google Patents

Brushless synchronous generator having flat exciter Download PDF

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Publication number
KR101472056B1
KR101472056B1 KR20140117177A KR20140117177A KR101472056B1 KR 101472056 B1 KR101472056 B1 KR 101472056B1 KR 20140117177 A KR20140117177 A KR 20140117177A KR 20140117177 A KR20140117177 A KR 20140117177A KR 101472056 B1 KR101472056 B1 KR 101472056B1
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South Korea
Prior art keywords
exciter
generator
armature
axial direction
length
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KR20140117177A
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Korean (ko)
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서정기
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주식회사 대흥기전
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K19/00—Synchronous motors or generators
    • H02K19/16—Synchronous generators
    • H02K19/26—Synchronous generators characterised by the arrangement of exciting windings
    • H02K19/28—Synchronous generators characterised by the arrangement of exciting windings for self-excitation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K19/00—Synchronous motors or generators
    • H02K19/16—Synchronous generators
    • H02K19/38—Structural association of synchronous generators with exciting machines
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/28—Layout of windings or of connections between windings

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Synchronous Machinery (AREA)

Abstract

Wherein the exciter of the brushless synchronous generator has a flat longitudinal inner surface at one end of the housing and a vertical longitudinal surface having a longer length in the transverse direction than a longitudinal length corresponding to the axial direction of the rotary shaft, And the exciter armature is provided with a flat plate shape having a longitudinal section having a longer length in the transverse direction than a length in the longitudinal direction corresponding to the axial direction of the exciter armature By generating electric power from the magnetic flux generated by the exciter, the length of the exciter portion can be significantly shortened as compared with the conventional generator.

Description

Technical Field The present invention relates to a brushless synchronous generator having a flat exciter,

More particularly, to a brushless synchronous generator operating in a self excited manner.

A brushless synchronous generator is a brushless generator that does not need a brush to supply current to the field by supplying direct current to the field corresponding to the rotor of the generator. It is an alternator whose frequency is determined. The brushless synchronous generator can be divided into a self excited generator and a separated excited generator according to the excitation method. The other excitation method is a method of generating a field magnetic flux by using an external power source and the excitation method is a method of generating a field magnetic flux by using an internal power source generated from a generator itself.

A brushless synchronous generator that operates in a self-excited mode can be divided into a main generator portion generating main power output to the outside and an exciter portion generating excitation power required to generate main power and supplying the main power to the main generator. A conventional brushless synchronous generator as disclosed in Korean Patent Publication No. 10-0678492 has a structure in which a cylindrical main generator and a cylindrical exciter are coupled in a line and the length of the generator is very long. Thus, there is a problem that a very large space is required for installation of the brushless synchronous generator. Also, as the brushless synchronous generator becomes longer in one direction, there is a problem that the dead space increases and the space can not be utilized efficiently.

And to provide a brushless synchronous generator that reduces the installation space of the generator by reducing the length of the brushless synchronous generator and enables efficient space utilization. The present invention is not limited to the above-described technical problems, and another technical problem may be derived from the following description.

According to an aspect of the present invention, a brushless synchronous generator includes: a rotating shaft that rotates by an external force through a housing of the brushless synchronous generator in a longitudinal direction; Which is attached to a flat inner surface of one longitudinal end of the housing in a flat plate shape having a vertical longitudinal length longer than a longitudinal length corresponding to the axial direction of the rotary shaft, thereby generating a magnetic flux in a direction parallel to the axial direction Machinery; The exciter unit is rotated integrally with the rotating shaft so as to face the exciter plate in a flat plate shape having a length in the transverse direction longer than the length in the longitudinal direction corresponding to the axial direction to generate electric power from the magnetic flux generated by the exciter An exciter armature; A generator field rotating integrally with the rotating shaft to generate magnetic flux from the electric power generated by the exciter armature; And a generator armature attached to the inner surface of the housing and generating power output to the outside from the magnetic flux generated by the generator field.

The exciter having a plurality of iron cores radially arranged on the flat inner surface of one end of the housing at an equal angle to each other; And a plurality of windings wound around each of the iron cores so as to be rounded on a plane perpendicular to the axial direction and connected to each other by a single strand, It is possible to form a flat plate shape having longitudinal sections longer in the transverse direction than the length in the direction.

Wherein the brushless synchronous generator further comprises a bracket which is inserted into the coupling hole formed at the center of the rotor and inserted into the rotation shaft to rotate integrally with the rotary shaft in the shape of a circular plate having a plane direction perpendicular to the axial direction, The armature includes a plurality of iron cores disposed radially on a flat surface of the bracket at an equal angle to each other; And a plurality of windings wound around each of the iron cores so as to circulate on a plane perpendicular to the axial direction, wherein the number of magnetic poles corresponding to the number of iron cores of the exciter and the number of cores corresponding to the iron cores of the exciter armature The number of stimuli may be different.

Wherein the brushless synchronous generator includes a bracket rotatably connected to the coupling hole formed at the center of the rotary shaft, the rotary shaft integrally inserted into the coupling hole, the rotary shaft integrally coupled to the rotary shaft and having a planar shape having a plane direction perpendicular to the axial direction; And a rectifier which is inserted into the bracket in the thickness direction and whose input end is electrically connected to the exciter armature and whose output end is electrically connected to the generator field to thereby rectify the alternating current output from the exciter armature and output to the generator field The exciter armature may be attached to one surface of the bracket and integrally rotated with the bracket so as to rotate integrally with the rotation shaft.

Wherein the generator field is a columnar shape having a longitudinal section having a shorter transverse length than a longitudinal length corresponding to the axial direction and is integrally rotated with the rotary shaft so as to be perpendicular to the axial direction from the power generated by the exciter armature And the generator arm is wound around the outer circumferential surface of the generator field in the shape of a cylinder having a vertical cross-section having a shorter length in the transverse direction than the longitudinal length corresponding to the axial direction, so that the magnetic flux generated by the generator field Power can be generated.

The exciter of the brushless synchronous generator is attached to the flat inner surface of one end of the housing in a flat plate shape having a lengthwise longitudinal length that is longer than the longitudinal length corresponding to the axial direction of the rotary shaft, And the exciter armature is caused to rotate by the exciter field by being integrally rotated with the rotary shaft so as to face the exciter in the form of a flat plate having a vertical length longer in the transverse direction than the length in the longitudinal direction corresponding to the axial direction The length of the exciter portion can be significantly shortened by generating electric power from the magnetic flux. As a result, not only the space required for installing the brushless synchronous generator can be reduced, but also the dead space is reduced, thereby enabling efficient space utilization.

The rectifier for rectifying the AC output from the exciter to output it to the generator field is inserted and coupled in the thickness direction to a bracket that is integrally rotated with the rotary shaft in the form of a circular flat plate and the exciter armature is attached and bonded to one surface of the bracket By rotating integrally with the bracket, the rectifier in the conventional generator can be positioned in a line between the generator field and the exciter armature, eliminating the factor of increasing the length of the generator, so that the overall length of the generator can be further reduced.

In addition, the generator field is integrally formed with the rotary shaft in the form of a cylinder having a longitudinal section having a shorter length in the transverse direction than the longitudinal length corresponding to the axial direction of the rotary shaft, so that the electric field generated from the electric power generated by the exciter armature And the generator armature is wound from the magnetic flux generated by the generator field by winding the outer circumferential surface of the generator field in a cylindrical shape having a vertical length shorter than the longitudinal length corresponding to the axial direction of the rotary shaft, By generating electric power, large-capacity power generation can be made even though the length of the exciter part is greatly reduced.

1 is a longitudinal sectional view of a brushless synchronous generator according to an embodiment of the present invention.
FIG. 2 is a view showing a state in which the generator armature 42 is inserted into the generator field 41 shown in FIG.
3 is a plan view of the exciter 31 shown in Fig.
Fig. 4 is an exploded view of the exciter 31 shown in Fig.
5 is a plan view of the exciter 32 shown in Fig.
6 is an exploded view of the exciter armature 32 shown in Fig.
7 is a wiring diagram between the exciter armature winding 322, the rectifier 34, and the generator field winding 412 shown in Fig.
8 is a view showing the direction of the magnetic flux of the brushless synchronous generator shown in Fig.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. A brushless synchronous generator is a brushless generator that does not need a brush to supply current to the field by supplying direct current to the field corresponding to the rotor of the generator. It is an alternator whose frequency is determined. The embodiments described below relate to a self-excited brushless synchronous generator to which a flat exciter is applied, and will be briefly referred to as "brushless synchronous generator" hereinafter.

1 is a longitudinal sectional view of a brushless synchronous generator according to an embodiment of the present invention, taken along the longitudinal direction from the diameter of one end of the brushless synchronous generator to the diameter of the other end. 1, the brushless synchronous generator according to the present embodiment includes a housing 10, a rotating shaft 20, an exciter 31, an exciter 32, a bracket 33, a rectifier 34, A generator armature 41, a generator armature 42, and an automatic voltage regulator (AVR) 50. Here, the generator field 41 and the generator armature 42 are classified as the main generator 40 as a portion that generates power output to the outside, and the exciter 31 and the exciter 32 are connected to the generator field The exciter 30 is classified into a part generating excitation power output to the excitation unit 41. [ The above-described components are main components, and the brushless synchronous generator according to the present embodiment can be constituted by adding other components in addition to the above-described components.

The housing 10 is formed in a cylindrical shape so that the rotor of the generator can rotate smoothly therein, and both ends of the housing 10 are closed except for the portion through which the rotating shaft 20 penetrates. The inner surface of the housing 10 must be cylindrical in order to smoothly rotate the rotor of the generator, but the outer surface may not be cylindrical in shape for securing the generator. The housing 10 is provided with a rotary shaft 20, an exciter 31, an exciter 32, a bracket 33, a rectifier 34, a generator field 41 and a generator armature 42 . Among the elements housed in the housing 10, the exciter 32, the bracket 33, the rectifier 34 and the generator field element 41 are elements that are rotated by the rotary shaft 20, do. On the other hand, the exciter 31 and the generator armature 42 may be collectively referred to as a stator, which is an element attached and fixed to the housing 10.

The rotary shaft (20) passes through the housing (10) in the longitudinal direction and rotates by an external force. 1, the rotary shaft 20 penetrates a through hole formed at the center of one longitudinal end portion of the housing 10 and a through hole formed at the center of the other longitudinal end portion. Ball bearings 11 and 12 are inserted between the rotating shaft 20 and the through holes at both ends of the housing 10 so that the rotating shaft 20 can rotate smoothly. Examples of the external force for rotating the rotary shaft 20 include power, hydraulic power, and wind power of the internal combustion engine. The rotating shaft 20 receives the kinetic energy of the external power source and rotates to rotate the exciter 32 coupled to the rotating shaft 20 and the generator field 41 to generate electric energy.

The exciter 31 is mounted on a flat inner surface of one longitudinal end of the housing 10 in a flat plate shape having a longer length in the transverse direction than a length in the longitudinal direction corresponding to the axial direction of the rotary shaft 20, 20 in the direction parallel to the axial direction. As shown in Fig. 1, the exciter 31 is attached and fixed on one of two circular inner surfaces of the opposite longitudinal end portions of the housing 10, which are opposed to each other in the longitudinal direction of the cylindrical housing 10.

The exciter 31 is composed of a plurality of exciter iron cores 311 and a plurality of exciter field windings 312 wound on the exciter iron cores 311 a plurality of times. The exciter core 311 is generally made of a silicon steel plate. In this embodiment, since the N pole and S pole of the exciter iron core 311 are fixed and the direction of the magnetic flux does not change, it can be made of a general steel plate. Each of the exciting coil windings 312 is wound around each exciter core 311 so as to extend in a plane perpendicular to the axial direction of the rotating shaft 20. Since each of the exciting coil windings 312 is wound around the exciting coil iron core 311 in the circumferential direction of the rotating shaft 20 in this manner, the exciting coil 313 is wound around the rotating shaft 20 by the exciter 31, A magnetic flux in a direction parallel to the axial direction of the rotor can be generated.

The exciter 32 has an exciter 31 integrally formed with the rotating shaft 20 so as to face the exciter 31 in a flat plate shape having a length in the longitudinal direction longer than the length in the longitudinal direction corresponding to the axial direction of the rotating shaft 20 And generates electric power from the magnetic flux generated by the exciter 31 by rotating. 1, the exciter 32 is not directly coupled to the rotary shaft 20 but is attached to one surface of a circular flat plate, that is, a disk-shaped bracket 33, and is integrally rotated with the bracket 33 Thereby rotating integrally with the rotary shaft 20. As described above, both the exciter 31 and the exciter 32 are provided on the flat inner surface of one longitudinal end of the housing 10 with a length in the transverse direction that is longer than the longitudinal direction corresponding to the axial direction of the rotary shaft 20 The length of the exciter portion can be significantly shortened as compared with the conventional generator because excitation power is generated in a structure in which the two flat plates are opposed to each other.

The exciter 32 is composed of a plurality of exciter armature cores 321 and a plurality of exciter armature windings 322 wound around the exciter armature cores 321 a plurality of times. The direction of the magnetic flux passing through the inside of the armature core 321 of the exciter armature varies with the rotation of the armature core 321, so it is preferable that the armature 321 is made of a silicon steel plate. Each exciter winding 322 is wound around each exciter iron core 321 so as to circulate on a plane perpendicular to the axial direction of the rotating shaft 20. Since each exciting coil winding 322 is wound around the exciting coil iron core 321 in the circumferential direction of the rotating shaft 20 and is thus rotated, the magnetic flux passing through the plane surrounded by the exciting coil winding 322 And the electromotive force is induced in each exciter winding 322 according to the Faraday's law so that a current flows.

The bracket 33 rotates integrally with the rotary shaft 20 in the shape of a circular plate having a plane direction perpendicular to the axial direction of the rotary shaft 20 and inserted into the coupling hole formed at the center of the rotary shaft 20. The rectifier 34 is inserted in the thickness direction of the bracket 33 so that the input is connected to the exciter 32 and the output is connected to the generator field 41 to rectify the AC output from the exciter 32 To the generator field (41). The rectifier (34) is constituted by a plurality of rectifying elements inserted and coupled to a plurality of pairs of openings at positions spaced equidistantly from the center of the disc-shaped bracket (33). A typical example of a rectifying element is a diode. As described above, the rectifier 34 is provided in the inner area around the center engaging hole of the bracket 33, and the exciter armature 32 is provided in the outer area, thereby further reducing the overall length of the generator. In conventional generators, such a rectifier is located in a line between the generator field and the exciter armature, which causes the length of the generator to become longer.

The generator field element 41 generates a magnetic flux from the electric power generated by the exciter armature 32 by inserting the rotary shaft 20 into the coupling hole formed at the center thereof and integrally rotating with the rotary shaft 20. 1, the generator field member 41 is integrally rotated with the rotary shaft 20 in the form of a columnar shape having a length in the lateral direction shorter than the length in the longitudinal direction corresponding to the axial direction of the rotary shaft 20 And generates a magnetic flux in a direction perpendicular to the axial direction of the rotary shaft 20 from the electric power generated by the exciter 32. [ The generator field 41 is composed of a single columnar generator iron core 411 and a generator field winding 412 wound on the same. As described above, since DC is supplied from the rectifier 34 to the generator field 41, the generator field winding 412 is a single winding or a plurality of windings connected in a single strand, .

The generator armature 42 is attached to the inner surface of the housing and generates electric power output from the magnetic flux generated by the generator field 41 to the outside. As shown in FIG. 1, the generator armature 42 is formed into a cylindrical shape having a length in the lateral direction shorter than the length in the longitudinal direction corresponding to the axial direction of the rotary shaft 20, and is wound around the outer peripheral surface of the generator field 41 Thereby generating electric power from the magnetic flux generated by the generator field 41. The generator armature 42 comprises a single cylindrical generator armature core 421 and three stranded generator armature windings 422 wound thereon. As such, since the generator armature winding 422 has three strands, three phases of AC can be generated.

FIG. 2 is a view showing a state in which the generator armature 42 is inserted into the generator field 41 shown in FIG. The generator field winding 412 and the generator armature winding 422 are omitted to clearly show the structural features of the generator field core 411 and the generator armature core 421. [ The generator core iron core 411 is formed with a coupling hole through which the rotary shaft 20 is inserted and coupled at the center thereof. Four longitudinally grooved grooves are formed on the outer circumferential surface at intervals of 90 degrees to have four protruding portions in the vertical and horizontal directions. This can be fabricated by stacking several "+" shaped silicon steel sheets. The generator field winding 412 is wound on each protrusion of the generator field core 411 a plurality of times. Accordingly, the N pole and the S pole can be alternately formed in the four protruding portions of the generator field core 411. The direction of the magnetic flux formed at any one point of the generator armature 42 is changed from time to time as the generator field 41 rotates.

On the inner circumferential surface of the generator armature core 421, 54 protruding portions far larger than the number of protruding portions of the generator core iron core 411 are formed. The three-stranded generator armature winding 422 is wound several times on each protruding portion of the generator armature core 421. As described above, the three-phase generator armature winding 422 is wound around each protruding portion of the generator armature core 421 so that three-phase alternating current can be output from the three-phase generator armature winding 422. Since the winding structure of the generator armature 42 is known as a spiral structure and is well known to those skilled in the art, a detailed description will be omitted in order to prevent the features of the present invention from being blurred .

Since the outer circumferential surface of the cylinder and the inner circumferential surface of the cylinder are opposed to each other, the opposing area of the generator field 41 and the generator armature 42 is increased and the number of fluxes connected to the generator armature winding 422 increases It is possible to develop large capacity. On the other hand, since the exciter 30 needs to produce only the electric power corresponding to the field current output to the generator field 41, such large-capacity power generation is not required. Generally, the exciter 30 is fabricated to about one-twentieth the size of the main generator 40. In this embodiment, by paying attention to this point, the length of the exciter 31 and the exciter 32 is significantly reduced instead of sacrificing the facing area between the exciter 31 and the exciter 32 The length of the brushless synchronous generator can be greatly reduced.

In addition, the diameter of the exciter portion of the conventional generator is smaller than that of the main generator portion because the exciter generating power is much smaller than the power generated by the main generator. The diameter of the housing 10 in which the exciter 31 and the exciter 32 are housed is smaller than the diameter of the housing 10 in the portion where the generator field 41 and the generator armature 42 are housed It is possible to increase the opposed area between the exciter 31 and the exciter 32. As a result, reduction of the facing area due to the shape of the exciter 31 and the exciter 32 facing each other can be compensated to some extent. As the diameter of the housing 10 becomes constant, the installation of the generator and the manufacture of the housing 10 are facilitated, so that the manufacturing cost of the generator can be reduced. In addition, the rotor can be constructed in a simpler structure The vibration of the generator can be reduced because it can rotate.

The automatic voltage regulator 50 keeps the voltage output from the generator armature 42 constant by changing the field current output to the exciter 31 in inverse proportion to the change in the voltage output from the generator armature 42. [ The generator must supply a constant voltage to the external electrical equipment. To this end, the electromotive force induced in the generator armature winding 422 must be constant and the flux linking the generator armature winding 422 must be constant. When a load is applied to the generator and a load current flows through the generator armature winding 422, the inductor is generated by this load current. The electromotive force induced in the generator armature winding 422 is reduced due to the potato phenomenon caused by the inverse of the inductor, so that the output voltage of the generator also decreases.

The automatic voltage regulator 50 increases the voltage output from the generator armature 42 by increasing the field current output to the exciter 31 when the voltage output from the generator armature 42 decreases, The voltage output from the generator armature 42 is reduced by reducing the field current output to the exciter 31. [ The magnitude of the magnetic flux generated by the exciter 31 can be increased or decreased in proportion to the magnitude of the current flowing through the exciter winding 312 so that the voltage output from the generator armature 42 can be kept constant . Thus, the automatic voltage regulator 50 monitors the output voltage of the generator and controls the output voltage of the generator in a negative feedback system.

Fig. 3 is a plan view of the exciter 31 shown in Fig. 1, and Fig. 4 is an exploded view of the exciter 31 shown in Fig. 3, a plurality of exciter iron cores 311 are radially arranged on an inner surface of a flat circular shape at one end of the housing 10 at an equal angle from the center of the inner surface thereof, The exciting coil winding 312 is wound around the exciting coil 311. Referring to Fig. 4, each of the exciter iron cores 311 has a vertical cross section corresponding to the axial direction of the rotary shaft 20, that is, the vertical cross section has a "T" shape. As described above, the exciter iron core 311 can be made of a general steel plate instead of a silicon steel plate. As shown in Fig. 4, each of the exciter iron cores 311 wound with the respective windings forms a flat plate shape having a vertical longitudinal side longer than the longitudinal direction corresponding to the axial direction of the rotary shaft 20 . The bolt 313 and the spring washer 314 can be used to attach a narrower one side of the "T" shaped exciter iron core 311 to the inner surface of one end of the housing 10. Accordingly, the exciting coil winding 312 is held between the portion of the excitation coil core 311 which is warped at right angles with the inner surface of the one end portion of the housing 10.

In the present embodiment, in order to output three-phase AC power from the brushless synchronous generator, the number of the exciter iron cores 311 is required to be equal to the number of the exciter iron cores 311 It should be an even number. For example, as shown in Fig. 3, eight exciter iron cores 311 may be radially arranged on the flat circular inner surface of one end of the housing 10 at equal 45 degrees widened from each other. The direction of magnetic flux of each exciter iron core 311 is different from that of the other two exciter iron cores 311 adjacent to this. That is, the magnetic poles of the eight exciter iron cores (311) alternate between N poles and S poles.

The excitation arrangement of the exciter 31 is such that the current flow direction of the exciter winding 312 wound on each exciter iron core 311 is alternately repeated counterclockwise and clockwise according to the Amper's law . As shown in FIG. 3, eight exciter iron core 311 are arranged in the order of N1, S1, N2, S2, N3, S3, N4 and S4 in the clockwise direction. Hereinafter, each of the exciter core iron cores 311 and the exciter coil windings 312 wound thereon may be referred to as "stimulation ". The excitation coil windings 312 are wound around the excitation iron core 311 along the circumference of each exciter iron core 311 in the form of a counterclockwise spiral. Accordingly, when DC flows into the winding start point of each exciting coil winding 312, current flows in the counterclockwise direction around the iron core, and when DC flows into the winding end point of the exciting coil winding 312, Current flows clockwise.

In this embodiment, the winding end point of each exciter coil winding 312 is connected to the adjacent exciter coil winding 312 so that the N pole and S pole are alternately formed radially on the flat circular inner surface of the one end of the housing 10 And the winding start point of each exciter winding 312 except the N1 excitation and the S4 excitation is connected to the winding starting point of the neighboring exciting coil winding 312. [ For example, the winding end point FN1 of the N1 magnetic pole is connected to the winding end point FS1 of the S1 magnetic pole, and the winding start point CS1 of the S1 magnetic pole is connected to the winding start point CN2 of the N2 magnetic pole. On the other hand, the winding start point CN1 of the N1 magnetic pole is connected to the positive output terminal of the automatic voltage regulator 50 and the winding start point CS4 of the S4 magnetic pole is connected to the negative output terminal of the automatic voltage regulator 50.

As described above, the directions of the currents flowing through the exciting coil windings 312 wound around the exciter iron cores 311 are alternately opposite to each other, so that the directions of the magnetic fluxes of the respective magnetic poles alternately become opposite to each other. Alternating currents can be induced in the exciter winding 322 by alternating magnetic fluxes in opposite directions. In this embodiment, the winding direction of the windings wound on all of the exciter iron cores 311 is made constant, and one side of the housing 10 is connected through the wiring structure between the windings of the exciter iron cores 311, The N-pole and the S-pole are alternately formed radially on the inner surface of the flat circular end of the end portion, thereby making it possible to reduce the defect rate of the product due to the manufacturer's confusion about the winding direction, And the manufacturing cost can be lowered.

Fig. 5 is a plan view of the exciter armature 32 shown in Fig. 1, and Fig. 6 is an exploded view of the exciter armature 32 shown in Fig. 5, a plurality of exciter iron core cores 321 are radially arranged on the flat one surface of the bracket 33 at the same angle from each other at the center of one surface thereof, and each exciter iron core 321 is provided with a female The armature winding 322 is wound. Here, one surface of the bracket 33 on which the exciter iron core 321 is disposed is a surface facing the inner surface of one longitudinal end portion of the housing 10. 6, each of the exciter iron core 321 has a vertical cross section corresponding to the axial direction of the rotary shaft 20, that is, the vertical cross section has a "T" shape. As described above, such an exciter iron core 321 can be manufactured by stacking a plurality of "T" shaped silicon steel plates. 6, each of the exciter iron cores 321 around which the respective windings are wound forms a flat plate shape having a vertical longitudinal side longer than the longitudinal direction corresponding to the axial direction of the rotary shaft 20 . The bolt 323 and the spring washer 324 can be used to attach a narrower one side of the "T" shaped exciter armature core 321 to one side of the bracket 33. Accordingly, the excitation coil winding 322 is held between the portion of the excitation armature core 321 which is warped at a right angle and the one surface of the bracket 33, and is fixed.

If the numbers of the excitation coil iron core 321 and the exciter iron core 311 are the same, the excitation armature winding 322 wound on each exciter iron core 321 is wound around each exciter iron core 311 at the same time, The electromotive force of the same phase with respect to time is induced in each exciter winding 322. Therefore, single-phase power is generated even if the exciting coil winding 322 is connected in any way. When the numbers of the excitation coil iron core 321 and the exciter iron core 311 are made different from each other, the excitation armature winding 322 wound on each exciter iron core 321 is wound around each exciter iron core 311 So that the electromotive force of different phases is induced in each exciter winding 322. In this case,

In order to output three-phase alternating-current power from the exciter 30, the winding structure of the exciter 32 needs to be of a spiral structure like the main generator 40. In this embodiment, since the exciter 30 is formed in a flat plate shape, it is very difficult and complicated to make the winding structure of the exciter 30 a crumb structure. The number of the poles corresponding to the number of the exciter iron cores 311 and the number of the poles corresponding to the exciter iron cores 321 are different from each other in order to output AC power of three phases from the exciter 30 in this embodiment different. For example, as shown in Fig. 5, nine exciter iron core 321 may be radially arranged on the same flat surface of the bracket 33 at the same angle of 40 degrees to each other. As shown in Fig. 5, nine exciter armature cores 321 are arranged in the order of R1, R2, R3, S1, S2, S3, T1, T2 and T3 in the clockwise direction. Hereinafter, each of the exciter iron core 321 and the exciter armature winding 322 wound thereon may be referred to as "excitation ". And is wound around a pair of exciting armature windings 322 of three pairs adjacent to each other in the armature core 321 of the exciting armature. For example, one strand of the armature winding 322 is wound several times on the armature 321 of the excitation armature corresponding to the R1 stimulus, and then wound in the order of R2 and R3. 321).

As described above, when eight exciter groups 31 and nine exciter arms 32 are disposed, the mechanical angle between the exciters of the exciter 31 is 45 degrees and the exciter 32 is excited. The mechanical angle between the stimulation of the stimulation is 40 degrees. On the other hand, the electrical angle of the N pole and the next S pole of the exciter 31 is 180 degrees. Therefore, the electric angle between the neighboring magnetic poles of the exciter 32 is 160 degrees, and the electric power generated by the next magnetic pole R2 is 160 degrees behind the electric power generated by the reference magnetic pole R1. That is, when the number of the stimuli of the exciter 32 is equal to the number of the exciters of the exciter 31, the electricity generated by the next stimulus R2 is 180 degrees Electricity will be generated 20 degrees ahead of that which will be lost.

Therefore, electricity is generated 20 x 3 = 60 degrees ahead of the reference magnetic pole R1 in the reference magnetic pole R1 of the exciter armature 32 and the third magnetic pole S1 having three poles apart therefrom. In this embodiment, since the poles of the windings wound on the reference magnetic pole R1 and the magnetic poles S1 are opposite to each other, electricity is generated in advance of the magnetic pole S1 by 240 degrees ahead of the reference magnetic pole R1. On the same principle, electricity is generated 20 times 6 = 120 degrees ahead of the reference magnetic pole R1 at the sixth magnetic pole T1 where six poles are separated from the reference magnetic pole R1. In summary, a phase difference of 120 degrees is generated between the reference stimulus R1 and the stimulus of the exciter 32 having a stimulation interval of three times, thereby forming three-phase AC power.

As shown in FIG. 5, when three magnetic poles of the exciter armature 32 are connected in series, three-phase alternating current is outputted from the exciter 32. As shown in FIGS. 5-6, when the exciter armature 32 having nine magnetic poles is rotated at 1800 rpm on the exciter 31 having eight magnetic poles, the three-phase 120 Hz alternating current Is output. Here, the frequency of the alternating current output from the exciter 32 is a value obtained by dividing the value obtained by multiplying the RPM (Revolution Per Minute) of the exciter 32 by the number of the excitation of the exciter 31.

As described above, in the present embodiment, three magnetic poles of the exciter 32 are connected in series and the exciter of the exciter 31 is arranged so as to have eight, so that the three phases An alternating current of 120 Hz can be outputted from the exciter armature 32. If the exciter 30 having a larger power generation amount is required to produce a generator of a larger power generation amount, the number of stimuli of the exciter must be increased. The number of magnetic poles of the exciter 32 is set to a multiple of 9 and the number of magnetic poles of the exciter 31 is set to 8 so that the ratio of the number of excitation of the exciter 32 to the number of excitation of the exciter 31 To be 9 to 8 is preferable. For example, when the number of excitation of the exciter 31 is 16, the number of excitation of the exciter 32 is 18, and when the number of excitation of the exciter 31 is 24, The number of stimulation of the stimulation is 27.

Fig. 7 is a wiring diagram between the exciter armature winding 322, the rectifier 34, and the generator field winding 412 shown in Fig. Referring to Fig. 7, the rectifier 34 is composed of six diodes D1-D6. The starting point C1 of the exciter winding 322 on R is connected in parallel to the anode of the diode D1 and the cathode of the diode D2 and the cathode of the diode D1 is connected to the positive terminal of the generator field 41 The anode of the diode D2 is connected to the negative terminal of the generator field 41. Likewise, the starting point C1 of the exciter winding 322 on S is connected in parallel to the anode of the diode D3 and the cathode of the diode D4, and the starting point C1 of the exciter armature winding 322 on T is connected to the anode of the diode D5 and the diode D6 In parallel. The cathodes of the diodes D3 and D5 are connected to the positive terminal of the generator field 41 and the anodes of the diodes D4 and D6 are connected to the negative terminal of the generator field 41.

Through this connection, the alternating current output from each starting point C1 of the exciting coil winding 322 on the R phase, the S phase, and the T phase is rectified by three phase full wave and converted into DC. 5, six diodes, that is, three pairs of diodes, constituting the rectifier 34 are inserted and connected to three pairs of openings spaced apart from the center of the disk-shaped bracket 33 at equal intervals. Here, a pair of diodes refers to two diodes inserted in such a manner that the directions of the anode and the cathode are opposite to each other in the bracket 33 in order to facilitate the wiring as described above. That is, the three pairs of diodes are D1-D2 pair diodes, D3-D4 pair diodes, and D5-D6 pair diodes.

8 is a view showing the direction of the magnetic flux of the brushless synchronous generator shown in Fig. 8, a magnetic flux is generated in a direction parallel to the axial direction of the rotary shaft 20 in the exciter 31 and a magnetic flux is generated in a direction perpendicular to the axial direction of the rotary shaft 20 in the generator field 41 do. In the present embodiment, the exciter 30 can be manufactured in the shape of a flat plate by using the magnetic flux in a direction parallel to the axial direction of the rotating shaft 20, so that the length of the generator can be greatly reduced, The main generator 40 generates electric power by using magnetic flux in a direction perpendicular to the axial direction of the rotary shaft 20, thereby enabling a large-capacity electric power to be generated.

The present invention has been described with reference to the preferred embodiments. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

10 ... housing
11, 12 ... ball bearing
20 ... rotation shaft
30 ... Female
31 ... Female machine player
311 ... Female machine iron core
312 ... Wound machine field winding
32 ... Female armature
321 ... Female armature iron core
322 ... Female armature winding
33 ... bracket
34 ... rectifier
40 ... main generator
41 ... generator field
411 ... generator field iron core
412 ... generator field winding
42 ... generator armature
421 ... generator armature iron core
422 ... generator armature winding
50 ... Automatic voltage regulator

Claims (5)

In a brushless synchronous generator,
A rotating shaft passing through the housing of the brushless synchronous generator in the longitudinal direction and rotating by an external force;
Which is attached to a flat inner surface of one longitudinal end of the housing in a flat plate shape having a vertical longitudinal length longer than a longitudinal length corresponding to the axial direction of the rotary shaft, thereby generating a magnetic flux in a direction parallel to the axial direction Machinery;
The exciter unit is rotated integrally with the rotating shaft so as to face the exciter plate in a flat plate shape having a length in the transverse direction longer than the length in the longitudinal direction corresponding to the axial direction to generate electric power from the magnetic flux generated by the exciter An exciter armature;
A generator field rotating integrally with the rotating shaft to generate magnetic flux from the electric power generated by the exciter armature;
A generator arm attached to the inner surface of the housing and generating power output to the outside from the magnetic flux generated by the generator field; And
And a bracket rotatably coupled to the rotation shaft, wherein the rotation shaft is inserted into the coupling hole formed at the center and has a planar shape having a plane direction perpendicular to the axial direction,
The exciter machine
A plurality of iron cores radially arranged on the flat inner surface of one end of the housing at an equal angle to each other; And
And a plurality of windings wound on the respective iron cores so as to be rounded on a plane perpendicular to the axial direction and connected with one strand,
Each of the iron cores on which the respective windings are wound forms a flat plate shape having a vertical longitudinal length longer than a longitudinal length corresponding to the axial direction of the rotary shaft,
The exciter armature
A plurality of iron cores disposed radially on the flat surface of the bracket at equal angles to each other; And
And each of the iron cores includes a plurality of windings wound around the plane on a plane perpendicular to the axial direction,
Wherein the number of magnetic poles corresponding to the number of iron cores of the exciter and the number of magnetic poles corresponding to the iron cores of the exciter armature are different from each other. delete delete The method according to claim 1,
A rectifier inserted into the bracket in the thickness direction and having an input terminal electrically connected to the exciter armature and an output terminal electrically connected to the generator field to thereby rectify the AC output from the exciter armature and output the rectified AC generator to the generator field Including,
Wherein the exciter armature is attached to one surface of the bracket and integrally rotates with the bracket to rotate integrally with the rotation shaft. The method according to claim 1,
Wherein the generator field is a columnar shape having a longitudinal section having a shorter transverse length than a longitudinal length corresponding to the axial direction and is integrally rotated with the rotary shaft so as to be perpendicular to the axial direction from the power generated by the exciter armature Direction magnetic flux,
The generator armature is configured to generate electric power from the magnetic flux generated by the generator field by winding the outer circumferential surface of the generator field in a cylindrical shape having a vertical length shorter than the length in the longitudinal direction corresponding to the axial direction, A brushless synchronous generator.
KR20140117177A 2014-09-03 2014-09-03 Brushless synchronous generator having flat exciter KR101472056B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108599462A (en) * 2018-05-18 2018-09-28 江苏沃元精密机械有限公司 A kind of motor that thermal diffusivity is strong
KR20210007620A (en) * 2019-07-12 2021-01-20 주식회사 대흥기전 Double field winding brushless synchronous generator removing distortion of output

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004159436A (en) * 2002-11-07 2004-06-03 Hitachi Ltd Generator equipped with brushless exciter and power generating facility using the same

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004159436A (en) * 2002-11-07 2004-06-03 Hitachi Ltd Generator equipped with brushless exciter and power generating facility using the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108599462A (en) * 2018-05-18 2018-09-28 江苏沃元精密机械有限公司 A kind of motor that thermal diffusivity is strong
CN108599462B (en) * 2018-05-18 2024-01-30 江苏沃元精密机械有限公司 Motor with strong heat dissipation performance
KR20210007620A (en) * 2019-07-12 2021-01-20 주식회사 대흥기전 Double field winding brushless synchronous generator removing distortion of output
KR102293663B1 (en) 2019-07-12 2021-08-26 주식회사 대흥기전 Double field winding brushless synchronous generator removing distortion of output

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