JP2551929Y2 - motor - Google Patents

Description

[Detailed description of the invention]

[0001]

[Industrial applications] This invention is based on one magnetic pole part.
Part of a phase-only coil is wound, and each phase is sequentially arranged in the circumferential direction.
Three-phase nine-pole armatures arranged in rows and six or twelve alternating magnetic poles
The present invention relates to a motor having pole field means.

[0002]

2. Description of the Related Art Usually, a three-phase, nine-pole armature and an alternating polarity
In the case of a motor having six-pole field means,
The interval between (slots) is 120 degrees in electrical angle
The winding pattern for the 9 poles of the armature is 1 pole
One-pole, one-pole winding part of a single-phase coil around the magnetic pole part
It is most efficient that each phase is arranged in order in the circumferential direction
Is well known. And in the past,
A motor having a three-phase nine-pole armature and six-pole field means of alternating polarity, wherein the poles of each of the armature and the field means are substantially evenly arranged in a circular manner in a schematic plan view. There is one as shown in FIG. 4 and FIG. 5 which is a developed conceptual view of the motor.

In FIG. 4 and FIG. 5, in this conventional motor, a stator 10 (armature) including a stator core 100 and a winding 20 wound thereon and a rotor magnet 30 are substantially rotationally symmetric. It is configured. A set of stator teeth (magnetic poles) located at 120-degree intervals of the stator core 100, for example, number 101,
A pair of coils in the same phase, 201, 204, and 207, are wound around the stator teeth indicated by 104 and 107 to have the same polarity. FIG. 5 shows the arrangement and winding polarity of each coil in each phase, and CW shows clockwise as viewed from the outside of the stator teeth. N and S in the MG of FIG. 5 indicate the polarity on the inner peripheral side of the rotor magnet 30, respectively.

The stator core 100 is usually 0.5 mm
A predetermined number of core plates (which can be made of, for example, an electromagnetic steel plate) having a thickness of about a predetermined number are laminated, and these are integrally formed by rivets, pack caulking, or the like. In this case, the swaged portion is
Although it is preferable to provide the magnetic pole portion in terms of mechanical strength,
Higher magnetic resistance with or without caulking than without
Therefore, the motor characteristics are degraded. Because of this,
4 and the swaging portions 40, 41 and 41 of the stator core 100.
And 42 are aligned to avoid distortion of the core shape due to caulking.
In order to make the mechanical strength uniform in the circumferential direction , the stator teeth 10
To 9,103 and 106 are provided at a 120 degree intervals.

[0005]

In recent years, motors have been reduced in size to meet the demand for smaller and lighter devices. In particular, the outer diameter of the motor has been remarkably reduced, and a stator having a core diameter of about 20 to 30 mm and formed of a core thickness of several mm is not uncommon. However, in the conventional motor, the size of the caulked portion integrally formed with the shape of the stator core is relatively large with respect to the shape of the stator core due to such miniaturization.

In this conventional motor, the swaging portions 40, 4
The stator teeth having Nos. 1 and 42, that is, 109, 103 and 106 have a smaller inductance of the magnetic flux excited by the winding 20 and a lower magnetic resistance to the rotor magnet 30 than the other stator teeth having no caulking portion. growing. Moreover, as is apparent from FIG. 4, the stator teeth having the caulked portion are concentrated only in the third phase, and the other first and second phases do not have the caulked portion. Therefore, unevenness occurs in the maximum value of the generated torque, and the torque ripple becomes large. As a result, the effective torque is reduced, and it is inevitable that there is an adverse effect such as uneven rotation.

The present invention has been made in view of the above-mentioned problems in the prior art, and has as its object the flattening of the torque generation distribution and the reduction of the torque ripple to a low level. An object of the present invention is to provide a motor capable of increasing the effective value of torque while suppressing the torque.

[0008]

Means for Solving the Problems In order to achieve the above object, the motor according to the present invention has a single pole magnetic pole part with only one phase.
3 in which each part is wound and each phase is arranged in order in the circumferential direction
A phase 9-pole armature and 6-pole or 12-pole field means of alternate magnetic poles provided rotatably relative to the armature are provided. In each of the armature and the field means, A motor which is substantially uniformly circularly arranged, wherein the armature is formed integrally by caulking a laminated core plate, and the core plate has 6 out of the 9 poles.
The poles of the magnetic pole portion has a caulking portion is caulked one by one place each, these caulking portions, the said armature
It is provided on a magnetic pole part symmetrically located about an axis passing through a specific magnetic pole part having no caulking part .

[0009]

Since the poles of each of the armature and the field means are substantially uniformly arranged in a circular pattern, each pole of the magnetic pole of the armature is substantially at every central angle of 40 degrees, and each pole of the field means is substantially at a central angle of 40 degrees. It is located at every upper central angle of 60 degrees or 30 degrees. The poles of the field means are arranged in alternating polarity, and the armature is constituted by one coil and one coil, and the coils of the same phase are wound as a set of three coils arranged every 120 degrees. I have.

On the other hand, the caulking portion of the core has a caulking portion.
The three magnetic pole portions are provided symmetrically with respect to an axis passing through a specific magnetic pole portion. For this reason, the coils of each phase have two caulking portions out of the three coils of the same phase, and the inductance of each phase and the magnetic resistance to the rotor magnet become substantially equal. Therefore, the maximum value of the generated torque becomes uniform, the torque ripple is reduced, and the rotation unevenness is also reduced. In addition, the caulking portion is 6 poles out of 9 poles.
Is provided in the magnetic pole part of
The presence of the caulked portion as described above
There is no deviation, and there is no problem in strength.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a motor according to the present invention will be described with reference to FIGS. FIG. 1 is a schematic plan view of the motor. The same parts already used in FIG. 4 are given the same numbers. In addition, the development concept of the motor of this embodiment is the same as that of FIG. 100 is a stator core. The stator core 100 has nine slots and nine stator teeth, and has substantially nine times rotational symmetry. The stator teeth have nine poles 101 to 109 and are arranged substantially at every central angle of 40 degrees. In the stator core 100 shown in this embodiment, the outer diameter 1
Eighteen core plates (formed of electromagnetic steel plates) each having a thickness of 8 mm and a thickness of 0.5 mm are laminated and integrally formed by pack caulking.

In FIG. 1, reference numerals 51 to 53 and 61 to 63 denote caulking portions formed by the pack caulking. The caulking portion is provided at a substantially central portion of a magnetic pole portion corresponding to each stator tooth in a stacking direction of a core plate. It is caulked by. These caulking parts are provided in six places in total. An axis XX ′ (an axis passing through a specific stator tooth 106) that divides the stator core 100 into two in a radial line symmetry.
On the other hand, three caulked portions are provided on each of the stator teeth positioned symmetrically. That is, the axis X in FIG.
-Caulking portions 61, 62 and 63 on the left side toward -X '
Are provided on the stator teeth 105, 104 and 103, while the caulking portions 51, 52 and 53 corresponding to the line symmetry on the right side in FIG.
108 and 109 are provided.

The stator core 100 is provided with a three-phase driven winding 20. As shown in FIGS. 1 and 5,
Coils of the same phase are wound with the same polarity (CW: clockwise as viewed from the outside of the stator teeth) around a set of stator teeth located at substantially 120-degree intervals. That is, the coil 201, which is the first phase of the winding 20, is wound around the stator teeth 101,
Next, it is wound on the stator teeth 104 and further on the stator teeth 107, respectively, and these are connected in series. Similarly, the second phase coil 202 has stator teeth 102, 10
5 and 108, respectively, and these are connected in series. Then, the third phase coil 203 is also connected to the stator teeth 10.
It is wound around 9, 103 and 106 and connected in series. The stator core 100 and the windings 20 constitute the stator 10 (armature) as an example of the armature.

Reference numeral 30 denotes a cylindrical rotor magnet as an example of the field means. The rotor magnet 30 is provided rotatably and coaxially with respect to the stator 10 such that the inner peripheral surface thereof radially opposes the outer peripheral surface of the stator 10. The inner peripheral side of the rotor magnet 30 forms six poles of alternate polarity, and the poles are substantially uniformly arranged in a circle every 60 degrees of the central angle. 1 and 5 indicate the polarity on the inner circumferential side of the rotor magnet 30, respectively. FIG. 5 corresponds to the case where the stator 10 and the rotor magnet 30 have the positional relationship shown in FIG.

Next, the arrangement of the swaged portions 51 to 53 and 61 to 63 in the stator 10 will be described with reference to FIG. In relation to the first phase coil 201, only the stator teeth 101 have no caulked portions, and the other two stator teeth 104, 107 have caulked portions. Second
In connection with the phase coil 202, only the stator tooth 102 has no caulked portion and the other two stator teeth 10
5 and 108 have caulking portions. In addition, in relation to the third phase coil, only the stator teeth 106 have no caulked portions, and the other two stator teeth 103 and 109 have caulked portions. Accordingly, each phase of the winding 20 has substantially equal inductance, and the magnetic resistance to the rotor magnet 30 is also substantially equal, so that torque ripple can be reduced and rotation unevenness can be reduced.

In the motor of this embodiment, the torque waveform of the motor using the insulated copper wire having a diameter of 0.18 mm and winding 52 turns per slot is shown in FIG. In this case, the maximum and minimum torques are respectively 22
It was 2.5 g-cm and 162.5 g-cm. On the other hand, the torque waveform of a conventional motor (shown in FIG. 4) using a 0.18 mm diameter insulated copper wire and winding 52 turns per slot was as shown in FIG.
The maximum and minimum torques in this case are 230g-
cm and 153 g-cm. As described above, the motor of the present embodiment slightly reduces the maximum torque due to the difference in the number of swaged portions compared to the case of the conventional motor, but obtains the substantial torque improvement by increasing the minimum torque. I have. In addition, as is apparent from FIGS. 2 and 6, it can be seen that the rotation unevenness is also reduced. In addition, since the caulked portion is provided dispersedly around the stator core as compared with the conventional motor, the shape distortion of the stator core is not substantially affected.

FIG. 3 is a schematic plan view showing another embodiment of the motor according to the present invention, and particularly shows an arrangement of a swaging portion provided on the stator 10. As shown in FIG. Therefore, the windings and the like are omitted. FIG. 3A shows the stator core 1.
The caulking part 7 is symmetrical about the axis XX ′ with respect to
1, 72 and 73 and the corresponding caulking portions 74,
75 and 76 are provided. Next, in FIG. 3B, similarly, caulking portions 81, 82, and 83, and corresponding caulking portions 84, 85, and 86 are provided on the stator core 100. In FIG. 3C, the rotor magnet 3
0 indicates the alternating polarity of 12 poles. All of them have the same functions and effects as already described, and thus the description is omitted.

In order to increase the effective value of torque in the motor of the present invention, for example, the number of windings of the winding 20 may be increased to improve the torque constant. Even in that case, the torque ripple can be suppressed to a low level. Also,
The caulking method of the caulking portion has been described by way of an example of pack caulking, but it goes without saying that other caulking means known per se may be used.

[0019]

[Effect of the invention] In the present invention of the motor, since the caulking portion of the core plate, about an axis passing through the specific magnetic pole portion having no caulking portions are provided symmetrically, oak
The center part does not concentrate on the magnetic pole part of a specific phase,
And the like, the torque ripple is small, the effective value of the torque can be increased, and a motor with less rotation unevenness can be obtained. Moreover, 6 poles out of 9 poles
In order to provide a caulked part in the part,
The motor characteristics will not deteriorate as in the case of
No.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a motor according to an embodiment of the present invention.

FIG. 2 is a torque waveform diagram of the motor according to the embodiment of the present invention;

FIG. 3A is a schematic plan view of a motor according to a second embodiment of the present invention. FIG. 3B is a schematic plan view of the motor according to the third embodiment of the present invention. FIG. 3C is a schematic plan view of the motor according to the fourth embodiment of the present invention.

FIG. 4 is a schematic plan view of a conventional motor.

FIG. 5 is a developed conceptual diagram of a conventional motor.

FIG. 6 is a torque waveform diagram of a conventional motor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Stator (armature) 20 Winding 30 Rotor magnet 51-53 Caulking part 61-63 Caulking part 100 Stator core 101-109 Stator tooth 201-203 Coil

Claims (1)

(57) [Scope of request for utility model registration] 1. A part of a coil having only one phase in a magnetic pole part
Are wound, and three-phase nine-pole armatures in which respective phases are sequentially arranged in the circumferential direction, and six-pole or twelve-pole field means of alternate magnetic poles provided rotatably relative to the armature. A motor in which each pole of each of the armature and the field means is substantially uniformly arranged in a circular shape, wherein the armature is formed by caulking a laminated core plate and integrally forming the core plate; the has a caulking portion is caulked one by one place each magnetic pole portion of the 6-pole of the 9-pole, these clamping parts, have the caulking portion of the armature
The motor is provided on a magnetic pole portion symmetrically positioned about an axis passing through the specific magnetic pole portion.