JP2000060092A - Multipolar generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce cogging torque and further to construct a three-phase armature winding wound on a stator and each phase of the winding can be separated to improve voltage waveform, without significantly dropping generated voltage as compared with the conventional cases, by ensuring that the number of rotor poles and the number of stator slots are in special relation to each other. SOLUTION: A multipolar generator rotates a rotor 2 which has a plurality of permanent magnets 3 as magnetic poles and generates three-phase alternating- current voltage in armature windings in phases U, V and W which are wound on a stator 3. The multipolar generator is so constituted that the number of poles of the rotor 2 with the polarity of the poles alternately differing is 24 and furthermore the number of slots of the stator is 27. For the windings wound on the stator, the windings in phases U, V and W are sequentially wound in such a manner that the winding in each phase is continued for three slots, and each of the central ones of the windings wound in three consecutive slots is wound in the direction opposite to the direction in which both its adjacent windings are wound.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-pole generator, in particular, to give a special relation to the ratio between the number of rotor poles having permanent magnets as magnetic poles and the number of stator slots, thereby reducing the three-phase AC voltage generated. A multi-pole structure that minimizes the confrontation between the rotor magnetic poles and the corresponding stator teeth as much as possible while minimizing the voltage drop, reducing ripples in the three-phase AC voltage and reducing cogging torque. It relates to a generator.

[0002]

2. Description of the Related Art At present, multi-pole magnet generators are frequently used as generators used in engine welding machines. FIG. 25 is an explanatory view of a rotor shape of a conventional multipolar magnet generator, FIG. 26 is an explanatory view of a stator shape in which windings of the conventional multipolar magnet generator are omitted, and FIG. FIG. 3 shows an explanatory diagram of a unit.

In FIGS. 25 to 27, the stator 1
Inside the rotor 2 rotating on the outer circumference of the rotor, 18 permanent magnets # 1 to # 18 are arranged so that the polarities of the magnetic poles are sequentially different. The stator 1 has 27 slots 4 formed therein.
U-phase, V-phase, W wound in the same direction by skipping two slots
A three-phase armature winding of a phase is wound. That is, FIG.
As shown in the figure, the U-phase armature winding has {1 tooth,
It consists of three windings wound in the same direction on the tooth # 4 and the tooth # 7, and the V-phase armature winding is the same as the tooth # 2, the tooth # 5 and the tooth # 8. , The W-phase armature winding has # 3 teeth, # 6 teeth and ♯
It consists of three windings wound in the same direction on nine teeth.

With this relationship, the U-phase, V-phase, and W-phase armature windings are wound around the remaining # 10 to # 27 teeth, and the terminals of the corresponding phase armature windings are connected. Are connected in series or in parallel as needed to extract a three-phase AC voltage.

A conventional engine welding machine using this three-phase AC magnet generator having a winding structure is, as shown in the configuration diagram of the drooping characteristic type welding machine in FIG. The rectifier 6 rectifies the U-phase, V-phase, and W-phase three-phase AC voltages generated from the rectifier 6 and the DC voltage rectified by the rectifier 6 has a large ripple. A reactor 8 is inserted between the two to reduce the ripple. 9 denotes a base material and 10 denotes a welding rod.

[0006]

However, in the conventional three-phase AC magnet generator used in the engine welding machine, the conventional multipole magnet shown in FIG. 29 at a rotation speed of 3000 rpm and a frequency of 450 Hz is used. As can be seen from the waveform diagrams of the rectified voltage and the inter-phase voltage of the generator, the inter-phase voltage waveform (FIG. 2)
9) is poor, so that the ripple of the rectified voltage waveform after rectification (see FIG. 30), that is, the pulsation rate is 28.5.
%.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks, and the ratio of the number of rotor poles having permanent magnets to the number of slots of the stator has a special relationship. In addition to minimizing the cogging torque by minimizing the facing with the teeth, a winding structure that can separate each phase of the three-phase armature winding wound on the stator,
The generated voltage does not drop significantly compared to the past,
It is another object of the present invention to provide a multi-pole generator having a good voltage waveform and a small ripple, and requiring a small reactor after rectification when used in an engine welding machine.

[0008]

In order to solve the above-mentioned object, a multipolar generator of the present invention rotates a rotor having a plurality of magnets as magnetic poles, and rotates a U-phase and a V-phase wound around a stator. ,
In a multipolar generator for generating a three-phase AC voltage in a W-phase armature winding, the number of rotor poles having sequentially different magnetic poles is 8n (n = 1, 2, 3,...). In addition, the number of slots of the stator is 9n, and the windings wound around the stator are sequentially wound in a winding manner in which the windings of the respective phases of U-phase, V-phase, and W-phase are in units of three-slot continuous winding. In addition to being wound, each of the middle windings wound by the three-slot continuous winding is wound in the opposite direction to the adjacent windings.

Further, the number of poles of the rotor having magnetic poles having different polarities is (6n + 3) ± 1 (n = 1, 2, 3,...), And the number of slots of the stator is 6n + 3. The windings of the U-phase, V-phase, and W-phase are sequentially wound in units of 2n + 1-slot continuous winding, and are wound by the 2n + 1-slot continuous winding. It is also possible to provide a power generation unit in which the wound winding is wound in the opposite direction to the adjacent winding.

Further, the number of poles of the rotor having magnetic poles of different order is 12n + 2 (n = 1, 2, 3,...), And the number of slots of the stator is 12n. The windings of the U-phase, V-phase, and W-phase are sequentially wound in a winding manner in units of 2n-slot continuous winding, and are wound by the 2n-slot continuous winding. The wire is wound in the opposite direction to the adjacent winding, and the U-phase winding is followed by the W-phase winding, the W-phase winding is followed by the V-phase winding, and the V-phase winding. Next, in order of the U-phase windings, a power generation unit may be formed by winding the windings of the respective phases in a winding direction opposite to the winding direction of the winding of the next phase. .

The number of poles of the rotor having magnetic poles of different order is 12n-2 (n = 1, 2, 3,...), And the number of slots of the stator is 12n. The winding to be wound is such that the windings of the U-phase, V-phase, and W-phase are sequentially wound in units of 2n-slot continuous winding, and are wound by the 2n-slot continuous winding. Winding is wound in the opposite direction to the adjacent winding, and the U-phase winding, the V-phase winding, the V-phase winding, the W-phase winding, and the W-phase winding The power generation unit is formed by winding the windings of the respective phases in the order of the winding of the U-phase and the winding of the winding in the opposite direction to the winding of the next phase. Can also.

The number of poles of the rotor having the magnetic poles in order is 12 (n + 1) +2 (n = 1, 2, 3,...), And the number of slots of the stator is 6 (n + 1).
And the winding wound on the stator is U-phase, V-phase.
Phase and W-phase windings are sequentially wound in units of n + 1 slot continuous winding, and the winding wound in the n + 1 slot continuous winding is wound in the same direction as the adjacent winding. And the U-phase winding, the W-phase winding, the W-phase winding, the V-phase winding, the V-phase winding, and the U-phase winding in this order. Alternatively, the power generation unit may be formed by winding the winding of each phase in the winding direction opposite to the winding direction of the winding of the next phase.

The number of rotor poles having sequentially different magnetic poles is 12 (n-1) +2 (n = 1, 2, 3,...), And the number of stator slots is 6 (n + 1). )
And the winding wound on the stator is U-phase, V-phase.
Phase and W-phase windings are sequentially wound in units of n + 1 slot continuous winding, and the winding wound in the n + 1 slot continuous winding is wound in the same direction as the adjacent winding. And a U-phase winding, a V-phase winding, a V-phase winding, a W-phase winding, a W-phase winding, and a U-phase winding in this order. Alternatively, the power generation unit may be formed by winding the winding of each phase in the winding direction opposite to the winding direction of the winding of the next phase.

For example, when the number of poles of the rotor is 8n (n = 1,
2, 3, ...), the number of stator slots is 9n, U-phase,
The V-phase and W-phase windings are sequentially wound in a winding manner in units of three-slot continuous winding, and the center winding wound by the three-slot continuous winding is a winding adjacent to each of the windings. On the other hand, in a three-phase AC generator wound in reverse winding, the output vector of the middle winding wound by three-slot continuous winding is inverted by 180 ° and combined with other output vectors. In addition, the voltage drop of the three-phase AC voltage can be reduced. U
Since the phase, V-phase, and W-phase windings have a winding structure in which three-slot continuous winding is used as a unit, the windings of each phase can be separated.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view of a rotor shape of one embodiment of a multipolar generator according to the present invention, and FIG. 2 is a stator shape of one embodiment of the present invention in which windings of the multipolar generator are omitted. Explanatory diagram,
FIG. 3 shows an explanatory view of one embodiment of the power generation unit of the multipolar generator according to the present invention.

In FIGS. 1 to 3, 24 (= 8 × 3) permanent magnets # 1 to # 24 are provided inside a rotor 2 rotating on the outer periphery of a stator 1 so that the polarities of the magnetic poles are sequentially different. 3 are provided. The stator 1 has 27 (=
9 × 3) slots 4 are formed, and these 27 slots 4 are used to form three-phase armature windings of U-phase, V-phase, and W-phase in units of three-slot continuous winding. Each of the windings in the middle, which is sequentially wound and wound in a three-slot continuous winding unit, is wound in the opposite direction to the windings on both sides thereof.

That is, as shown in FIG. 3, the U-phase armature winding has a winding structure in which three continuous teeth are used as a unit. Two windings wound in the direction winding, and one wound around the # 2 tooth in the middle of the # 1 and # 3 teeth in the direction opposite to the winding direction of the # 1 and # 3 teeth And three continuous windings.

Similarly, the V-phase armature windings are # 4 and #
The two windings wound in the same direction around the tooth # 6, and the tooth # 5 at the center of the teeth # 4 and # 6 in the opposite direction to the winding direction of the teeth # 4 and # 6 The W-phase armature winding is composed of two windings wound in the same direction around # 7 and # 9 teeth. Three continuous windings of a wire and one winding wound around the # 8 tooth in the middle of the # 7 and # 9 teeth in the direction opposite to the winding direction of the # 7 and # 9 teeth Consists of lines.

With such a relationship, U-phase, V-phase and W-phase armature windings are wound around the remaining # 10 to # 27 teeth (illustration of these windings is omitted in FIG. 3). The terminals of the armature windings of each corresponding phase are connected in series or in parallel as needed to extract a three-phase AC voltage.

FIG. 4 shows a waveform diagram of the rectified voltage and the interphase voltage of the multipolar generator according to the present invention. The rotation speed at this time is 2250 rpm, and the frequency is set to the same 450 Hz for easy comparison with the conventional one.

As can be seen from FIG. 4, the inter-phase voltage waveform (see FIG. 4) is improved, and thus the ripple of the rectified voltage waveform after rectification (see FIG. 4), that is, the pulsation rate is remarkably improved, and In the example of FIG. 28 in which the welding machine is used as a welding machine, good welding characteristics can be obtained even if the reactor 8 is smaller than the conventional one.

Considering the output voltage shown in FIG. 3, for example, one phase of the U phase, the number of magnetic poles of the rotor 2 is 2
4. Since the number of slots in the stator 1 is 27, 180 ° × (24/27) =
Vectors U ₁ , U ₂ , and U ₃ shown in FIG. 5A having a phase relationship of 160 ° are generated. That is, based on the vector U _1, the phase angle 160 ° to the vector U ₁ and the vector U _2, has a phase angle 160 ° from that of the vector U ₂ and the vector U _3.

The output of the three-slot continuous winding becomes maximum because the vector U ₂ shown in FIG.
(B) This is the case where the phase is inverted as shown in the drawing to make the vector U ₂ bar, and the vector U ₁ , vector U ₂ bar, and vector U ₃ are vector-added. That is, when the middle winding of the three windings wound by the three-slot continuous winding is wound in the opposite direction to the adjacent windings, the middle winding is shown in FIG. as it becomes vector U ₂ bars, vector U ₂ bar angle 20 ° to the vector U _1, vector U ₃ is a relationship of angle 20 ° to the vector U ₂ bar.

Accordingly, the composite vector U of the three-slot continuous winding obtained by winding the middle winding of the three windings wound in the three-slot continuous winding in the opposite direction to the adjacent windings is obtained. Is as shown in FIG.

Now, assuming that the magnitude of the vector U ₁ is 1 (= the magnitude of the vector U ₂ , the magnitude of the vector U ₃ ), the magnitude of the composite vector U is 2.88. That is, the voltage generated by the U-phase three-slot continuous winding is 2.88.

That is, while the conventional U-phase generated voltage of three windings wound in the same direction by skipping two slots shown in FIG. 27 is three, the three-phase voltage shown in FIG. Since the generated voltage of the U phase of the continuous slot winding is 2.88, FIG.
Using the three-slot continuous winding structure shown in
Since the output is (2.88 / 3) × 100 = 96%, it is understood that the voltage does not decrease so much. Other V
The same applies to each of the phase and W-phase windings. The relationship between the generated voltage and the winding structure of the three-slot continuous winding and the three-strip winding wound in the same direction by skipping two slots has also been confirmed by experiments.

As for the voltage waveform, the waveform of the present invention shown in FIG. 4 is better than the conventional waveform shown in FIG. 29. Therefore, in the multipolar generator used for the welding machine, FIG.
It can be understood that the ripple after the rectification by the rectifier 6, that is, the pulsation rate is improved, and the voltage drop is more sacrificed than the reduction in the size of the reactor 8. And in the winding structure, since it is a continuous winding of three slots,
Phase, V-phase, and W-phase windings are separated, and there is an advantage that insulation is advantageous.

1 to 3, the number of slots of the stator is 27 (= 9 × 3), and the number of magnetic poles of the rotor is 24 (= 8 × 3).
Although the description has been given of the multipolar generator having the structure described above, the number of slots of the stator is generally 9n, and the magnetic pole of the rotor is 8n (n = 1, 2, 2).
3,...), The same holds true if the above-described winding method is used in units of three-slot continuous winding.
At this time, as shown in FIG. 3, the structure is such that the magnetic poles of the rotor and the corresponding teeth of the stator are less directly opposed.
Cogging torque can be reduced.

FIG. 7 is an explanatory view of another embodiment of the power generation unit of the multipolar generator according to the present invention.

In FIG. 1, 26 (= 6 × 4 + 2) permanent magnets 3 of # 1 to # 26 are arranged inside a rotor 2 rotating on the outer periphery of a stator 1 so that the polarities of the magnetic poles are sequentially different. Has been established. The stator 1 has 27 (= 6 × 4
+3) slots 4 are formed, and these 27 slots 4 are used to form U-phase, V-phase, and W-phase three-phase armature windings in units of 9 (= 2 × 4 + 1) slot continuous windings. In addition to the above-described winding method, the windings wound by the 9-slot continuous winding are wound in the opposite direction to the adjacent windings.

That is, the U-phase armature winding has
The winding structure of each tooth is taken as a unit. The winding of the # 1 tooth and the # 2 tooth is wound in the reverse direction, and the winding of the # 2 tooth and the # 3 tooth are reversed. Direction winding, and so on.
The windings of the 8th tooth and the # 9 tooth consist of 9 continuous windings wound in reverse winding.

Similarly, the V-phase armature winding is composed of nine continuous windings wound in opposite directions around the # 10 to # 18 teeth. Line is $ 19
9 wound in opposite directions around the teeth from # to # 27
It consists of continuous windings.

FIG. 8 shows the relationship between the magnetic poles of the rotor 2 and the stator 1 at this time. In FIG. 8, T represents a tooth of the stator 1, and an arrow attached to the T represents a winding direction. Since the stator 1 has 27 slots and the rotor 2 has 26 magnetic poles, the slots of the stator 1, ie, the teeth and the magnetic poles of the rotor 2 have an electrical angle of 180 ° −180 ° × (26/27). ) = 180 ° -1
73.33 ° = 6.67 ° (the third decimal place is rounded off).

For the sake of simplicity, T represents the teeth of the stator 1 around which the winding U _{1 of the} U-phase armature winding is wound.
Left end, when coincide with the left edge of the magnetic pole N of ♯1 of the rotor 2, the teeth windings V ₁ of the following V-phase armature winding of the winding U ₉ is wound in The left end of T is 6.67 ° x
9 = 60.03 ° (increased by 0.03 ° due to the above-mentioned rounding, but precisely 60 °; enter this value in the figure) and deviated by 60.03 from the left end of # 10 magnetic pole S of rotor 2. °
From the right end of the magnetic pole N of # 9 of the rotor 2
0 ° −60.03 ° = 119.97 ° (exactly 120
°. Enter this value in the figure). That is, the left end of the tooth T around which the winding V _{1 of the} V-phase armature winding is wound is located at ２ of the magnetic pole N of # 9 of the rotor 2.

[0035] In the same manner, the left end of the T of teeth winding W ₁ of the armature winding of the next W-phase winding V ₉ is wound, 6.
67 ° × 18 = 120.06 ° deviation (increased by 0.06 ° due to the above rounding, but is exactly 120 °), and is located at 120.06 ° from the left end of magnetic pole N of # 19 of rotor 2. 180 ° from the right end of # 18 magnetic pole S of rotor 2
−120.06 ° = 59.94 ° (exactly 60 °). That is, the left end of the tooth T around which the winding V _{1 of the} V-phase armature winding is wound is located at a position which is １ ／ of the magnetic pole S of # 18 of the rotor 2.

[0036] The left end of the T of teeth windings U ₁ of the next original U-phase armature winding of the W ₉ is wound, 6.67 °
× 27 = 180.09 ° deviation (0.
09 °, but 180 ° to be exact), 180.09 ° from the left end of the magnetic pole S of ♯2 of the rotor 2,
180 ° -180. From the right end of magnetic pole N of # 1 of rotor 2.
09 ° = −0.09 ° (exactly 0 °).
That left end of T tooth windings U ₁ of the armature winding of the U-phase is wound, the position of 0/3 of the magnetic pole N of ♯1 the rotor 2, i.e. returning to the initial position. That is, U phase, V phase, W phase
Each of the 9-slot continuous windings of each phase is a winding whose electrical angle is deviated by 120 °, and as shown in FIG. 10, a winding capable of generating three-phase AC voltages of U-phase, V-phase, and W-phase. It has a structure.

Here, the output voltage shown in FIG.
Considering the U phase of the phase
The wound winding is wound in the opposite direction to the next winding
Each winding U₁Or U₉The generated voltage is added
Will be done. That is, the vector U₁Based on
The vector U shifted by 6.67 °_TwoOr vector
U₉Of 9-slot continuous winding when
The resultant vector U is as shown in FIG.₁of
If the size is 1 (= vector U_Two, ... ,, vector U ₉Large
), The magnitude of the composite vector U is 85.9.
It becomes 9. That is, the power generated by the U-phase 9-slot continuous winding
The pressure is 85.99. The power generation unit shown in FIG.
The generated voltage of the multi-pole generator of the
The output is (85.99 / 9) × 100 = 96.0%
In this case, too, it is clear that the voltage does not drop so much.
You. Also, as can be seen from FIG.
Because the structure is less facing the stator teeth,
Great torque is reduced.

FIG. 11 is an explanatory view of another embodiment of the power generating unit of the multipolar generator according to the present invention.

In the figure, ten (= 6 × 1 + 4) permanent magnets 3 of # 1 to # 10 are arranged inside a rotor 2 rotating on the outer periphery of a stator 1 so that the polarities of magnetic poles are sequentially different. Has been established. The stator 1 has 9 (= 6 × 1 +
3) The number of slots 4 is formed, and these nine slots 4 are used to form three-phase armature windings of U-phase, V-phase, and W-phase.
(= 2 × 1 + 1) A continuous winding is performed in units of a continuous winding of slots, and the winding wound by the continuous winding of three slots is wound in the opposite direction to the adjacent winding. I have.

That is, the U-phase armature winding has three continuous
The winding structure of each tooth is taken as a unit. The winding of the # 1 tooth and the # 2 tooth is wound in the reverse direction, and the winding of the # 2 tooth and the # 3 tooth are reversed. It consists of three continuous windings wound in directional winding.

Similarly, the W-phase armature windings are # 4 and #
5, wound around the # 5 and # 6 teeth in opposite directions
And the V-phase armature winding is # 7
And # 8, and three continuous windings wound around the teeth # 8 and # 9 in opposite directions.

FIG. 12 shows the relationship between the magnetic poles of the rotor 2 and the stator 1 at this time. In FIG.
T represents the teeth of the stator 1, and the arrow attached to T represents the winding direction. Since the stator 1 has 9 slots and the rotor 2 has 10 magnetic poles, the slot of the stator 1, that is, the teeth and the magnetic poles of the rotor 2 have an electrical angle of 180 ° −180 ° × (10/9 ) = 180 ° −2
00 ° = −20 °.

For the sake of simplicity, T represents the teeth of the stator 1 around which the winding U _{1 of the} U-phase armature winding is wound.
Left end, when coincide with the left edge of the magnetic pole N of ♯1 the rotor 2, winding U ₂ is the left end of the T of the teeth are wound shifted 20 °, the windings U ₃ wound of The left end of the tooth T being shifted is further shifted by 20 °. The left end of T tooth winding W ₁ of the armature winding of the W-phase is wound further 20 °
Since it is misaligned, it is located at one third of the magnetic pole S of # 4 of the rotor 2. Hereinafter, similarly, the winding V _{1 of the} V-phase armature winding is set.
The left end of T of the tooth on which is wound is located at 2/3 of the magnetic pole N of # 7 of the rotor 2. Leftmost T tooth windings U ₁ of the following U-phase is wound, 20 ° × 9 = 180 ° shift is consistent with the left end of the magnetic pole N of ♯1 the rotor 2. That left end of T tooth windings U ₁ of the armature winding of the U-phase is wound back to the initial position. That is, the three-slot continuous windings of the U-phase, V-phase, and W-phase are windings shifted by 120 ° in electrical angle, and as shown in FIG. Is generated.

Considering the output voltage shown in FIG. 11, for example, the U-phase of one phase, the winding wound by three-slot continuous winding is wound in the opposite direction to the adjacent winding. since, so that the voltage to no windings U ₁ generated in U ₃ is added. That is, a reference vector U _1, vector U ₂ shifted by one -20 °, the resultant vector U of 3 slots consecutive turns when the vector U ₃ and vector addition, it as shown in FIG. 13 depicted, the vector U ₁ size When the value is 1 (= the size of the vector U ₂ and the vector U ₃ ), the size of the composite vector U is 2.88. That is, the generated voltage of the U-phase three-slot continuous winding is 2.8.
8 The output voltage of the multi-pole generator of the power generation unit shown in FIG. 11 is (2.
88/3) × 100 = 96.0%, and it can be seen that no significant voltage drop occurs in this case as well. In addition, as can be seen from FIG. 11, the cogging torque is reduced due to the structure in which the rotor magnetic poles and the corresponding stator teeth are less directly opposed.

In FIG. 11, the number of slots in the stator is 9 (=
Although the description has been given of the multipole generator having the structure of 6 × 1 + 3) and the rotor having 10 (= 6 × 1 + 4) magnetic poles, the structure of the power generation unit generally has the relationship shown in FIG. 6n + 3, and the magnetic pole of the rotor is 6n + 4 (n =
1, 2, 3,...). Also at this time, the voltage drop is small, and the cogging torque is reduced because the rotor magnetic poles and the corresponding stator teeth are less directly opposed.

FIG. 15 is an explanatory view showing another embodiment of the power generation unit of the multipolar generator according to the present invention.

In the figure, 14 (= 12 × 1 + 2) permanent magnets 3 of # 1 to # 14 are arranged inside a rotor 2 rotating on the outer periphery of a stator 1 so that the polarities of the magnetic poles are sequentially different. Has been established. The stator 1 has 12 (= 12
× 1) slots 4 are formed, and these 12 slots 4 are used to form U-phase, V-phase, and W-phase three-phase armature windings in units of 2 (= 2 × 1) slot continuous windings. In addition to the above winding, the two-slot continuous winding is wound in the opposite direction to the adjacent winding. In addition, a U-phase winding, a W-phase winding, a W-phase winding, a V-phase winding, a V-phase winding, a U′-phase winding,
Hereinafter, in the same order, the winding directions of the windings of the respective phases are wound in the opposite winding direction to the winding direction of the winding of the next phase.

That is, the U-phase, W-phase, and V-phase armature windings have a winding structure in which two continuous teeth are used as a unit. Is wound in reverse winding, and the winding of the W-phase # 3 tooth and # 4 tooth is wound in the reverse winding, and the V-phase # 5 tooth and # 6 tooth are wound. The winding is wound in reverse winding. Moreover, the U-phase # 2 tooth winding and the W-phase # 3 tooth winding are wound in the same direction, and the W-phase # 4 tooth winding and the V-phase # 5 tooth winding are wound in the same direction. The tooth winding is wound in the same direction. Similarly, V
The phase # 6 tooth winding and the next U ′ phase # 1 tooth winding are wound in the same direction.

FIG. 16 shows the relationship between the magnetic poles of the rotor 2 and the poles of the stator 1 at this time. In FIG. 16, T represents a tooth of the stator 1, and an arrow attached to the T represents a winding direction. Since the stator 1 has 12 slots and the rotor 2 has 14 magnetic poles,
A slot of the stator 1, that is, a tooth and a magnetic pole of the rotor 2 have an electrical angle of 180 ° −180 ° × (14/12) = 18.
0 ° -210 ° = −30 °.

For the sake of simplicity, the left end of T representing the teeth of the stator 1 around which the winding U _{1 of the} U-phase armature winding is wound coincides with the left end of the magnetic pole N of # 1 of the rotor 2. assuming that there, the left end of the T of teeth windings U ₂ are wound are shifted 30 °. And the winding W _{1 of the} W-phase armature winding
Since the left end of the tooth T around which is wound is further shifted by 30 °, it is located at a position which is １ ／ of the magnetic pole N of # 3 of the rotor 2. Similarly, the left end of the tooth T around which the winding V _{1 of the} V-phase armature winding is wound is located at 位置 of the magnetic pole N of # 5 of the rotor 2. Winding U of next U'-phase armature winding
The left end of T of the tooth on which ₁ ′ is wound is # 8 of rotor 2
Coincides with the left end of the magnetic pole S. Hereinafter, since the relationship is shifted while maintaining the relationship as described above, the next U of the V ′ phase (not shown)
Leftmost T tooth windings U ₁ of the armature winding phase is wound returns to the initial position. That is, the U-phase, V-phase, and W-phase two-slot continuous windings are windings shifted by 120 ° in electrical angle, and as shown in FIG. Is generated.

Here, the output voltage shown in FIG.
Considering one phase of U phase, two-slot continuous winding
The winding to be wound is wound in the opposite direction to the next winding.
Each winding U₁, U_TwoThe generated voltage is added
It will be. That is, the vector U₁Based on
Vector U shifted by -30 °_TwoWhen vector is added
The composite vector U of the two-slot continuous winding is shown in FIG.
And the vector U ₁Is 1 (= vector U_Two
), The size of the composite vector U is 1.
93. That is, generation of a continuous U-phase two-slot winding
The voltage is 1.93. The power generation unit shown in FIG.
The generated voltage of the multi-pole generator of the
The output is (1.93 / 2) × 100 = 96.5%,
In this case as well, the voltage drop is so small that the rotor
It has a structure in which the magnetic poles and the corresponding stator teeth are
Therefore, the cogging torque is reduced.

In FIG. 15, the number of stator slots is 12
(= 12 × 1), and the rotor magnetic pole is 14 (= 12 × 1 +
Although the description has been given of the multipolar generator having the structure 2), the power generation unit generally has the relationship shown in FIG.
(N = 1, 2, 3,...), The same holds true. At this time, the voltage drop is small, and the rotor poles and the corresponding stator teeth are less directly opposed, so that the cogging torque is reduced.

Here, the winding configuration shown in FIG. 15, that is, the three-phase armature windings of the U-phase, V-phase, and W-phase have 2 (= 2 ×
1) A winding which is sequentially wound in a winding manner in units of slot continuous winding and a winding in which the winding wound in the two-slot continuous winding is wound in the opposite direction to the adjacent winding, FIG.
The power generation unit having the relationship shown in FIG. However, the number of poles of the rotor at this time is 12n-2 (n =
1, 2, 3,...), The number of stator slots is 12n, and a U-phase winding is followed by a V-phase winding; a V-phase winding is followed by a W-phase winding; The winding of each phase is wound in the winding direction opposite to that of the winding of the next phase in the order of the winding of the U phase after the winding of the phase. .

At this time, for example, the number of poles of the rotor is 10,
When the number of slots of the stator is 12, the slots 4 of the stator 1 and the magnetic poles of the rotor 2 have an electrical angle of 180-180.
° × (10/12) = 180 ° −150 ° = 30 ° at a time, and the only difference is the reverse of the case of FIGS. 15 and 18 described above.

FIG. 20 shows another embodiment of the power generating unit of the multipolar generator according to the present invention.

In the figure, inside the rotor 2 rotating on the outer periphery of the stator 1, the polarities of the magnetic poles are sequentially changed so that 26 of [1] to [26] [= 12 (1 + 1) +2]
The permanent magnets 3 are arranged. Stator 1 is 12
[= 6 (1 + 1)] slots 4 are formed,
Using these twelve slots 4, the U-phase, V-phase, and W-phase three-phase armature windings are sequentially wound in units of 2 (= 1 + 1) slot continuous winding, and the two slots A winding wound in a continuous winding is wound in the same direction as an adjacent winding. In addition, U-phase winding, W-phase winding, W-phase winding, V-phase winding, V-phase winding, and U-phase winding
In the same order, the windings of the windings of each phase are wound in a winding configuration in which the winding direction of the winding of the respective phase is opposite to the winding direction of the winding of the next phase.

That is, the U-phase, W-phase, and V-phase armature windings have a winding structure in which two continuous teeth are used as a unit. , The W-phase # 3 tooth and the # 4 tooth winding, the V-phase # 5 tooth and the # 6 tooth winding are wound in the same direction in each phase. The phase winding and the W-phase winding, the W-phase winding and the V-phase winding, and the V-phase winding and the next U′-phase winding are wound in opposite directions, respectively. Have been. The same applies to the W′-phase and V′-phase windings.

FIG. 21 shows the relationship between the magnetic poles of the rotor 2 and the poles of the stator 1 at this time. In FIG. 21, T represents a tooth of the stator 1, and an arrow attached to the T represents a winding direction. Since the stator 1 has 12 slots and the rotor 2 has 26 magnetic poles,
A slot of the stator 1, that is, a tooth and a magnetic pole of the rotor 2 have an electrical angle of 180 ° −180 ° × (26/12) = 18.
0 ° -390 ° = −210 °.

For the sake of clarity, U-phase armature winding
Winding U₁Of T representing the teeth of the stator 1 on which is wound
The left end coincides with the left end of the magnetic pole N of # 1 of the rotor 2.
Then the winding U_TwoThe left end of the T on which the tooth is wound
210 °, that is, from the left end of the magnetic pole N of ♯3 of the rotor 2
30 ° off. And the winding W of the W-phase armature winding ₁
The left end of the T of the # 3 tooth on which is wound is further 210 °
Because it is shifted, 6 from the left end of the magnetic pole N of # 5 of the rotor 2
The position is 0 °, that is, 1/3. The same applies to V
Phase armature winding winding V₁To the left of the T on which the tooth is wound
The end is located at 位置 of the magnetic pole N of # 9 of the rotor 2.
Although not shown in FIG. 21, the next U'-phase armature winding
Wire winding U₁The left end of the T on which the 'is wound is low
The left end of the magnetic pole S of # 12 of the data 2. Like this below
It is not shown because it is shifted while maintaining the relationship
Winding U of armature winding of next U phase of V 'phase₁Is wound
The left end of the tooth T returns to its initial position. That is, U phase,
V-phase, W-phase two-slot continuous winding is 120 ° in electrical angle
The windings are shifted, as shown in FIG.
That can generate three-phase AC voltage of three phases, W phase
It has a structure.

Here, the output voltage shown in FIG.
Considering one phase of U phase, two-slot continuous winding
The winding to be wound is wound in the same direction as the next winding.
Each winding U₁, U_TwoThe generated voltage is added
It will be. That is, the vector U₁Based on
Vector U shifted by -30 °_TwoWhen vector is added
The composite vector U of the two-slot continuous winding is shown in FIG.
And the vector U ₁Is 1 (= vector U_Two
), The size of the composite vector U is 1.
93. That is, generation of a continuous U-phase two-slot winding
The voltage is 1.93. The power generation unit shown in FIG.
The generated voltage of the multi-pole generator of the
The output is (1.93 / 2) × 100 = 96.5%,
In this case as well, the voltage drop is so small that the rotor
It has a structure in which the magnetic poles and the corresponding stator teeth are
Therefore, the cogging torque is reduced.

In FIG. 20, the number of stator slots is 12
[= 6 (1 + 1)], the rotor magnetic pole is 26 [= 12 (1
+1) +2], but the power generation unit structure generally has the relationship shown in FIG. 23, and the magnetic poles of the rotor are 12 (n + 1) +2 (n = 1, 2, 2).
3,...), The same holds true even when the number of slots in the stator is 6 (n + 1). At this time, the voltage drop is small, and the rotor poles and the corresponding stator teeth are less directly opposed, so that the cogging torque is reduced.

Here, the winding configuration shown in FIG. 20, that is, the U-phase, V-phase, and W-phase three-phase armature windings have 2 (= 1 +
1) A winding which is sequentially wound in a winding method in units of slot continuous winding, and a winding which is wound in the same direction with respect to an adjacent winding in the winding wound by the continuous winding of two slots, FIG.
The power generation unit having the relationship shown in FIG. However, the number of poles of the rotor at this time is 12 (n + 1) −
2 (n = 1, 2, 3,...), The number of slots in the stator is 6 (n + 1), and the U-phase winding, the V-phase winding, and the V-phase winding W-phase winding, then W-phase winding, then U-phase winding, and the winding direction of each phase winding is opposite to the winding direction of the next phase winding. It is being turned.

At this time, for example, the number of poles of the rotor is 22,
When the number of slots of the stator is 12, the slots 4 of the stator 1 and the magnetic poles of the rotor 2 have an electrical angle of 180-180.
× (22/12) = 180 ° −330 ° = −150 °, and the only difference is the reverse of the case of FIGS. 20 and 23 described above, and a description thereof will be omitted.

[0064]

As described above, according to the present invention, the ratio between the number of poles of the rotor and the number of slots of the stator has a special relationship, and the winding structure has a plurality of continuous slots as a unit. Therefore, the ripple of the voltage can be reduced without causing a large voltage drop of the generated three-phase AC voltage, and each phase of the armature winding of the stator can be separated. In addition, since the rotor magnetic poles and the corresponding stator teeth are less directly opposed, the cogging torque is reduced. And U
Since the windings wound by the continuous winding of two phases, V-phase and W-phase, can be wound in the same direction, there is an advantage that the winding is easy. Since the output voltage waveform is good and the ripple is improved, the size of the rectified reactor can be reduced for use in an engine welding machine.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a rotor shape of an embodiment of a multipolar generator according to the present invention.

FIG. 2 is an explanatory view of a stator shape according to an embodiment of the present invention in which windings of a multipolar generator according to the present invention are omitted.

FIG. 3 is an explanatory view of one embodiment of the power generation unit of the multipolar generator according to the present invention.

FIG. 4 is a waveform diagram of a rectified voltage and an inter-phase voltage of the multipolar generator according to the present invention.

FIG. 5 is an explanatory diagram of a vector of a U-phase three-slot continuous winding.

FIG. 6 is an explanatory diagram of a combined vector of a U-phase three-slot continuous winding.

FIG. 7 is an explanatory view of another embodiment of the power generation unit of the multipolar generator according to the present invention.

FIG. 8 is a diagram illustrating the relationship between a magnetic pole and a stator.

FIG. 9 is an explanatory diagram of a combined vector of a U-phase 9-slot continuous winding.

FIG. 10 is an explanatory diagram of three-phase AC voltage generation.

FIG. 11 is an explanatory view of another embodiment of the power generation unit of the multipolar generator according to the present invention.

FIG. 12 is a diagram illustrating the relationship between a magnetic pole and a stator.

FIG. 13 is an explanatory diagram of a combined vector of a U-phase three-slot continuous winding.

FIG. 14 is a diagram illustrating the configuration of a magnetic pole and a stator having the same relationship.

FIG. 15 is an explanatory view of another embodiment of the power generation unit of the multipolar generator according to the present invention.

FIG. 16 is an explanatory diagram of a relationship between a magnetic pole and a stator.

FIG. 17 is an explanatory diagram of a combined vector of a U-phase 2-slot continuous winding.

FIG. 18 is an explanatory diagram of a configuration of a magnetic pole and a stator having the same relationship.

FIG. 19 is a configuration explanatory view of a magnetic pole and a stator having the same relationship.

FIG. 20 is an explanatory view of another embodiment of the power generation unit of the multipolar generator according to the present invention.

FIG. 21 is an explanatory diagram of a relationship between a magnetic pole and a stator.

FIG. 22 is an explanatory diagram of a combined vector of a U-phase two-slot continuous winding.

FIG. 23 is an explanatory diagram of a configuration of a magnetic pole and a stator having the same relationship.

FIG. 24 is a configuration explanatory view of a magnetic pole and a stator having the same relationship.

FIG. 25 is an explanatory diagram of a rotor shape of a conventional multipole magnet generator.

FIG. 26 is an explanatory view of a stator shape in which windings of a conventional multipolar magnet generator are omitted.

FIG. 27 is an explanatory diagram of a power generation unit of a conventional multipole magnet generator.

FIG. 28 is a configuration diagram of a drooping characteristic type welding machine.

FIG. 29 is a waveform diagram of a rectified voltage and an inter-phase voltage of a conventional multipolar magnet generator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stator 2 Rotor 3 Permanent magnet 4 Slot 5 Three-phase AC magnet generator 6 Rectifier 8 Reactor

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5H603 AA01 BB02 BB07 BB13 CA01 CA05 CB05 CC04 CC11 CC17 CD01 CD05 CD21 CE01 5H621 AA02 GA01 GA04 GB11 GB14 HH05 JK05

Claims (6)

[Claims] 1. A multipolar generator for generating a three-phase AC voltage on U-phase, V-phase, and W-phase armature windings by rotating a rotor having a plurality of magnets as magnetic poles. The number of poles of a rotor having different magnetic poles in order is 8n (n =
, And the number of slots in the stator is 9n. The windings wound around the stator are U-phase, V-phase, and W-phase windings. The three-slot continuous winding is wound sequentially in units of winding, and the middle winding wound by the three-slot continuous winding is wound in the opposite direction to the adjacent windings. A multipolar generator. 2. A multipolar generator for generating a three-phase AC voltage on a U-phase, V-phase, and W-phase armature winding wound on a stator by rotating a rotor having a plurality of magnets as magnetic poles. The number of poles of the rotor having different magnetic poles in order is (6n + 3)
.., And the number of slots in the stator is 6n + 3. The windings wound around the stator are U-phase, V-phase, and W-phase. The phase winding is sequentially wound in a winding manner in units of 2n + 1 slot continuous winding, and the winding wound by the 2n + 1 slot continuous winding is wound in the opposite direction to the adjacent winding. A multipolar generator, characterized in that: 3. A multi-pole generator for generating a three-phase AC voltage on a U-phase, V-phase, and W-phase armature winding wound on a stator by rotating a rotor having a plurality of magnets as magnetic poles. The number of poles of the rotor having different magnetic poles in order is 12n + 2
(N = 1, 2, 3,...), And the number of slots of the stator is 12n. The windings wound around the stator are U-phase, V-phase, and W-phase windings. The winding is sequentially wound in a winding manner in units of 2n-slot continuous winding, and the winding wound by the 2n-slot continuous winding is wound in the opposite direction to the adjacent winding, and U Phase winding, W phase winding, W phase winding, V phase winding, V phase winding, U phase winding, and so on. A multipolar generator, wherein the winding is wound in a winding form in which the winding direction is opposite to the winding direction of the winding of the next phase. 4. A multipolar generator for generating a three-phase AC voltage on U-phase, V-phase and W-phase armature windings wound on a stator by rotating a rotor having a plurality of magnets as magnetic poles. The number of poles of the rotor having different magnetic poles in order is 12n-2.
(N = 1, 2, 3,...) And the number of slots in the stator is 12n. The windings wound around the stator are U-phase, V-phase, and W-phase The winding is sequentially wound in a winding manner in units of 2n-slot continuous winding, and the winding wound by the 2n-slot continuous winding is wound in the opposite direction to the adjacent winding, and U Phase winding, V phase winding, V phase winding, W phase winding, W phase winding, U phase winding, and so on. A multipolar generator characterized by being wound in a winding configuration in which the winding direction is opposite to the winding direction of the next phase winding. 5. A multi-pole generator for rotating a rotor having a plurality of magnets as magnetic poles to generate a three-phase AC voltage on U-phase, V-phase, and W-phase armature windings wound on a stator. The number of poles of the rotor having different magnetic poles in order is 12 (n +
1) +2 (n = 1, 2, 3,...), The number of slots in the stator is 6 (n + 1), and the windings wound around the stator are U-phase, V-phase, The winding of each phase of the W phase is sequentially wound in a winding manner in units of n + 1 slot continuous winding, and the winding wound by the n + 1 slot continuous winding is wound in the same direction as the adjacent winding. Wound,
And, after the U-phase winding, the W-phase winding, and the W-phase winding, then V
The phase winding, the V phase winding, and then the U phase winding are wound in such a manner that the winding direction of each phase winding is opposite to the winding direction of the next phase winding. A multipolar generator characterized by being made. 6. A multi-pole generator for generating a three-phase AC voltage on a U-phase, V-phase, and W-phase armature winding wound on a stator by rotating a rotor having a plurality of magnets as magnetic poles. The number of poles of a rotor having sequentially different magnetic poles is 12 (n-
1) +2 (n = 1, 2, 3,...), The number of slots in the stator is 6 (n + 1), and the windings wound around the stator are U-phase, V-phase, The winding of each phase of the W phase is sequentially wound in a winding manner in units of n + 1 slot continuous winding, and the winding wound by the n + 1 slot continuous winding is wound in the same direction as the adjacent winding. Each of the windings is wound in the order of a U-phase winding, a V-phase winding, a V-phase winding, a W-phase winding, a W-phase winding, and a U-phase winding. A multipolar generator, wherein a winding of a phase winding is wound in a winding configuration in a direction opposite to a winding direction of a winding of a next phase.