JP5174770B2 - Commutator motor, blower and vacuum cleaner - Google Patents

Description

  The present invention relates to a commutator motor mainly used in a blower mounted on a vacuum cleaner or the like. The present invention also relates to a blower using the commutator motor and a vacuum cleaner equipped with the blower.

  In the field of the commutator motor, the field iron core is divided into four parts, a yoke part and a pole part. After winding the pole part of the four-part iron core with a fryer from the outside of the iron core, There has been proposed a commutator motor in which a winding speed is improved by press-fitting and fixing a pole portion to form a field assembly (see, for example, Patent Document 1).

JP-A-8-65979

  However, in the commutator motor of Patent Document 1, since the field core is divided into four parts, the roundness of the inner diameter portion of the field core deteriorates even when joined, and the vibration / noise of the commutator motor is reduced. There was a problem of increasing.

  The present invention has been made to solve the above-described problems, and is capable of reducing the circumferential length of the field winding, and is an inexpensive and highly efficient commutator motor and a blower using the commutator motor. And a vacuum cleaner equipped with the blower.

The commutator motor according to the present invention is
A field magnet with field windings on the field core;
An armature that is disposed inside the field core via a gap, and in which an armature winding is provided in a slot of the armature core,
And a stepped portion that is formed on at least one end face of the field core in the stacking direction of the field core and is recessed inward from the end face of the field core in the stacking direction.

  In the commutator motor according to the present invention, by providing a stepped portion near the magnetic pole center of the field core, the circumference of the field winding can be shortened, and an inexpensive and highly efficient commutator motor can be obtained. Can do.

FIG. 3 shows the first embodiment and is a cross-sectional view of the commutator motor 100. FIG. 3 shows the first embodiment and is a cross-sectional view of a field 40; FIG. 5 shows the first embodiment and is a side view of the field 40; FIG. 3 shows the first embodiment, and is a plan view of the field core 1. FIG. 3 shows the first embodiment and is a side view of the field core 1. FIG. 3 shows the first embodiment and is a side view showing the iron core configuration of the field iron core 1. FIG. 5 shows the first embodiment, and is a plan view of iron core punched plates 31a and 31b. Fig. 5 shows the first embodiment, and is a plan view of an iron core punched plate 31c. FIG. 3 shows the first embodiment and is a cross-sectional view of the armature 50. FIG. 3 shows the first embodiment, and is a cross-sectional view of the armature core 6. FIG. 5 shows the first embodiment, and is a cross-sectional view of a commutator motor 200 according to a first modification. FIG. 5 shows the first embodiment and is a side view of a field iron core 201 of a first modification. FIG. 5 shows the first embodiment, and is a side view showing the iron core configuration of a field iron core 201 of a first modification. FIG. 5 shows the first embodiment, and is a cross-sectional view of a commutator motor 300 according to a second modification. FIG. 5 shows the first embodiment and is a plan view of a field iron core 301 of a second modification. FIG. 5 shows the first embodiment and is a side view of the field winding jig. FIG. 5 shows the first embodiment and is a side view of the field winding jig. FIG. 5 shows the first embodiment, and is a cross-sectional view of a commutator motor 400 of a third modification. FIG. 9 shows the first embodiment and is a side view of a field 440 of a third modification. FIG. 5 shows the first embodiment, and is a transverse cross-sectional view of a field 440 of a third modification. FIG. 5 shows the first embodiment and is a plan view of a field iron core 401 of a third modification. FIG. 5 shows the first embodiment, and is a cross-sectional view of a commutator motor 500 of a fourth modification. FIG. 5 shows the first embodiment, and is a cross-sectional view of a field 540 of a fourth modification. FIG. 5 shows the first embodiment and is a plan view of a field iron core 501 of a fourth modification. FIG. 25 shows the first embodiment and is an enlarged view around the magnetic pole center in FIG. 24. FIG. 5 shows the first embodiment and is a longitudinal sectional view of the blower 1000. FIG. 3 is a diagram showing the first embodiment, and is a control circuit diagram of the commutator motor 100.

Embodiment 1 FIG.
1 to 27 are diagrams showing the first embodiment. FIG. 1 is a cross-sectional view of the commutator motor 100, FIG. 2 is a cross-sectional view of the field 40, FIG. 3 is a side view of the field 40, and FIG. 5 is a plan view of the field core 1, FIG. 5 is a side view of the field core 1, FIG. 6 is a side view showing the structure of the core of the field core 1, FIG. 7 is a plan view of the core cores 31a and 31b, FIG. Is a plan view of the iron core punch 31c, FIG. 9 is a cross-sectional view of the armature 50, FIG. 10 is a cross-sectional view of the armature core 6, FIG. 11 is a cross-sectional view of the commutator motor 200 of the first modification, FIG. Is a side view of the field core 201 of the first modification, FIG. 13 is a side view showing the configuration of the core of the field core 201 of the first modification, FIG. 14 is a cross-sectional view of the commutator motor 300 of the second modification, and FIG. FIG. 16 is a side view of the field winding jig, FIG. 17 is a side view of the field winding jig, and FIG. 18 is a commutator of the modification 3. FIG. 19 is a side view of the field 440 of the third modification, FIG. 20 is a cross-sectional view of the field 440 of the third modification, and FIG. 21 is a plan view of the field core 401 of the third modification. 22 is a cross-sectional view of the commutator motor 500 of the fourth modification, FIG. 23 is a cross-sectional view of the field 540 of the fourth modification, FIG. 24 is a plan view of the field core 501 of the fourth modification, and FIG. FIG. 26 is an enlarged view of the vicinity of the magnetic pole center in FIG. 24, FIG. 26 is a longitudinal sectional view of the blower 1000, and FIG. 27 is a control circuit diagram of the commutator motor 100.

  The present embodiment is characterized by the field configuration of the commutator motor 100. The commutator motor 100 according to the present embodiment is characterized in that a stepped portion is provided in the vicinity of the magnetic pole center of the field core. By providing the stepped portion in the vicinity of the magnetic pole center of the field iron core, the circumference of the field winding can be shortened, and an inexpensive and highly efficient commutator motor 100 can be obtained.

  Accordingly, the following description will be focused on the field of the commutator motor 100. First, the overall configuration of the commutator motor 100 will be described. The armature other than the field composing the commutator motor 100 will also be described.

  The configuration of the commutator motor 100 will be described with reference to FIGS. As shown in FIG. 1, the commutator motor 100 includes at least a field 40 and an armature 50. As will be described later, the commutator motor 100 additionally includes a bracket 10 and bearings 12a, 12b, and the like that form an outline together with the frame 9 (see FIG. 26).

  Hereinafter, the commutator motor 100 may be simply referred to as a motor or an electric motor.

  The field 40 includes at least the field core 1 and field windings 5a and 5b (see FIGS. 1 to 3).

  The field iron core 1 is a substantially quadrangular cylindrical shape having an arc portion as a whole. And it is provided with a pair of magnetic pole part 2a, 2b and a pair of yoke part 3a, 3b which are respectively arrange | positioned facing (refer mainly FIG. 4).

  And a pair of field winding 5a, 5b is given to a pair of magnetic pole part 2a, 2b.

  The field iron core 1 is a thin electromagnetic steel plate (for example, a thickness of about 0.1 to 1.0 mm, a non-oriented electrical steel plate (the crystal axis of each crystal so as not to be biased in a specific direction of the steel plate and exhibit magnetic properties). The direction is randomly arranged as much as possible))) is punched into a predetermined shape with a mold, and a predetermined number (a plurality) are laminated.

  The field iron core 1 according to the present embodiment is composed of a plurality of types of electromagnetic steel plates that are punched into a predetermined shape with a mold. Details of the configuration of the field core 1 will be described later.

  The pair of magnetic pole portions 2a and 2b are provided with field windings 5a and 5b via an insulating member 23 (see FIG. 3), and a field magnetic flux is obtained by passing a current through the field windings 5a and 5b. (See FIGS. 1 and 2).

  Stepped portions 21a and 21b are provided in the vicinity of the magnetic pole centers of the pair of magnetic pole portions 2a and 2b, respectively. The stepped portions 21a and 21b are configured by reducing the number of electromagnetic steel sheets to be laminated as compared with other portions of the magnetic pole portions 2a and 2b and the yoke portions 3a and 3b (see FIGS. 5 and 6).

  The field core 1 is formed by laminating iron cores 31a and 31b having no iron core near the magnetic pole center shown in FIG. 7 and an iron core 31c having an iron core also in the magnetic pole center shown in FIG. .

  As shown in FIG. 6, after laminating a plurality of iron cores 31 a and 31 b, a plurality of iron cores 31 c and a plurality of iron cores 31 a and 31 b are further laminated to form stepped portions 21 a, The field iron core 1 having 21b can be configured. That is, it is possible to arbitrarily set the height of the stepped portions 21a and 21b by changing the number of laminated iron cores 31a and 31b.

The operation and effect of the stepped portions 21a and 21b will be described later.
The number of iron cores 31c> the number of iron cores 31a, 31b The number of iron cores 31a = the number of iron cores 31b.

  On the other hand, the armature 50 disposed inside the field core 1 via the air gap 14 (see FIG. 1) includes at least the armature core 6, the armature winding 7, and the output shaft 8 as shown in FIG. Prepare. Similarly to the field iron core 1, the armature core 6 is also formed by punching a thin electromagnetic steel sheet (for example, a non-oriented electrical steel sheet having a thickness of about 0.1 to 1.0 mm) into a predetermined shape with a die. It is formed by laminating the number (plural).

  As shown in FIG. 10, the entire shape of the armature core 6 is substantially a cylinder. Accordingly, the shape of the outer periphery in the cross section of the armature core 6 is discontinuous but is substantially a circle. A slot 15 to be described later is discontinuous because it opens outward.

  As the armature core 6, an electromagnetic steel plate made of the same material as the field core 1 may be used, or an electromagnetic steel plate made of another material may be used. For example, the thickness of the electromagnetic steel sheet of the armature core 6 may be set to a material thinner than the thickness of the electromagnetic steel sheet of the field core 1. Thereby, the iron loss (especially eddy current loss) of the armature core 6 is reduced, and a highly efficient commutator motor can be obtained.

  The armature winding 7 is applied to the slots 15 (see FIG. 10, 22 in the example of FIG. 10) of the armature core 6. The armature winding 7 is connected to a commutator 13 (see FIG. 26) described later. An output shaft 8 is provided at the center of the armature core 6. For example, a fan 1000 (see FIG. 26, the fan 1000 is an electric cleaner, for example) by attaching a blade 11 (see FIG. 26) described later to the output shaft 8. Used).

  The core portion between the slots 15 of the armature core 6 is called a tooth portion 16. Further, a shaft hole 17 into which the output shaft 8 is fitted is provided at the center of the armature core 6 (see FIG. 10).

  Here, an example in which the stepped portions 21a and 21b are provided on both end surfaces of the field core 1 in the stacking direction has been described. However, the thickness may be changed, and the stepped portions may be provided asymmetrically on both end surfaces in the stacking direction. 21a and 21b may be provided only on one end face in the stacking direction.

  Further, although the stepped portions 21a and 21b are provided symmetrically with respect to the magnetic pole center, they may be provided asymmetrically with respect to the magnetic pole center.

  The commutator motor 200 of Modification 1 shown in FIG. 11 differs from the commutator motor 100 of FIG. 1 in the configuration of the field 240, particularly the configuration of the field iron core 201.

  The field iron core 201 of Modification 1 shown in FIGS. 12 and 13 is provided with stepped portions 21a and 21b only on one end face in the stacking direction (in FIGS. 12 and 13, the upper end face in the stacking direction).

  When the stepped portions 21a and 21b are provided only on one end face in the stacking direction, it is effective to provide them on the blade 11 side (upper side in FIG. 26). In the armature 50, there is a commutator on the opposite side of the blade 11, and there is room in the height direction (vertical direction) of the field windings 5 a and 5 b, so that the stepped portions 21 a and 21 b on the blade 11 side. And the height of the field windings 5a and 5b can be reduced, and a small and lightweight blower 1000 can be obtained.

  As shown in FIG. 13, in the field iron core 201 of the first modification, the stepped portions 21a and 21b are laminated by laminating a plurality of iron core blanks 31c and further laminating a plurality of iron core blanks 31a and 31b. It is possible to configure the field iron core 201 having only the one end surface in the direction. Also in this case, it is possible to arbitrarily set the heights of the stepped portions 21a and 21b by changing the number of the core punched plates 31a and 31b to be laminated.

Also in the field core 201 of the first modification,
The number of iron cores 31c> the number of iron cores 31a, 31b The number of iron cores 31a = the number of iron cores 31b.

  As shown in FIG. 4, the field core 1 is configured without the iron cores 31 a, 31 b, 31 c being scattered by providing the crimping portions 22 at four locations (four corners of the field core 1) of the field core 1. be able to.

  Although not shown in the drawings, the lamination of the electromagnetic steel sheets by caulking is performed as follows. That is, when punching, laminating and bundling the electromagnetic steel sheets, before punching the electromagnetic steel sheets, a part of the electromagnetic steel sheets is pushed into a die by a convex punch to form the uneven portions in advance. The electrical steel sheet on which the uneven portions are formed is then punched into a predetermined shape and simultaneously laminated on the electrical steel sheet punched immediately before. At this time, the convex portions of the electromagnetic steel plate punched this time are fitted into the concave portions of the electromagnetic steel plate punched previously, and these electromagnetic steel plates are caulked.

  Here, although the example which provides the crimping | crimped part 22 in four places was demonstrated, even if it provides in two places of the yoke parts 3a and 3b, it is possible to comprise a field iron core.

  The commutator motor 300 of Modification 2 shown in FIG. 14 differs from the commutator motor 100 of FIG. 1 in the configuration of the field 340, particularly the configuration of the field core 301.

  As in the field iron core 301 shown in FIG. 15, the caulking portion 22 may be provided at one location in the substantially central portion of each of the yoke portions 3 a and 3 b.

  The field iron core 1 in FIG. 4 has four caulking portions 22, but the field iron core 301 shown in FIG. 15 has two caulking portions 22, so the caulking strength is higher than that of the field iron core 1 in FIG. 4. Although somewhat reduced, the iron loss accompanying the deterioration of the magnetic characteristics of the crimping portion 22 is reduced, and the efficiency of the electric motor is improved.

  Next, a method of forming the field windings 5a and 5b will be described with reference to FIGS.

  After the insulating member 23 is provided on the field core 1 configured as described above (here, the field core 1 of the commutator motor 100 will be described as an example), both sides in the stacking direction are formed on the inner diameter portion of the field core 1. Thus, guides 24a and 24b are installed. Holes 24a-1 and 24b-1 are provided in a part of the guides 24a and 24b. The holes 24a-1 and 24b-1 may be expressed as grooves.

  After the guides 24a and 24b are installed on the inner diameter portion of the field core 1, clampers 25a and 25b are installed along the stepped portions 21a and 21b from the outer peripheral side of the field core 1 (vertical direction in FIG. 4). . The guides 24a and 24b are fixed by inserting the clampers 25a and 25b into the holes 24a-1 and 24b-1 provided in the guides 24a and 24b.

  The field windings 5a and 5b can be wound from the inner diameter side of the field core 1 by repeatedly moving a nozzle (not shown) along the guides 24a and 24b in the vertical direction and rotating 180 degrees.

  Here, clampers 25a and 25b are used as means for fixing the guides 24a and 24b.

  When the clampers 25a and 25b are not used, or when the holes 24a-1 and 24b-1 provided in the guides 24a and 24b and into which the clampers 25a and 25b are inserted are made small, the field windings 5a and 5b having large wire diameters are used. There is a problem that it is impossible to wind the guide along the guides 24a and 24b at high speed.

  Further, in this case, it is possible to wind the field windings 5a and 5b having a small wire diameter at a low speed, but there is a problem that the winding work time becomes long.

  In order to securely fix the guides 24a and 24b, it is necessary to increase the sizes of the holes 24a-1 and 24b-1 into which the clampers 25a and 25b are inserted. As a result, it is necessary to lengthen the height direction (stacking direction) of the field windings 5a and 5b. When the height direction (stacking direction) of the field windings 5a and 5b is lengthened, there is a problem that the amount of copper (amount of magnet wire) is large and the winding resistance is high, so that the cost is high and the motor efficiency is low. .

  In the present embodiment, the stepped portions 21a and 21b are provided in the field core 1, and the clampers 25a and 25b are inserted along the stepped portions 21a and 21b to fix the guides 24a and 24b. The thick field windings 5a and 5b can be wound with a short circumference, the amount of copper can be reduced and the resistance of the field windings 5a and 5b can be reduced, and the commutator motor 100 is inexpensive and highly efficient. Can be obtained.

  Further, since the winding circumference of the field windings 5a and 5b is shortened, the overall height of the field magnet 40 can be reduced, and a small commutator motor 100 can be obtained.

  Further, by providing the stepped portion 21, the field iron core 1 is lightened, and a lightweight commutator motor 100 can be obtained. A blower 1000 (see FIG. 26) using the commutator motor 100 is used as a vacuum cleaner. By mounting, the vacuum cleaner becomes lighter and a vacuum cleaner with good operability can be obtained.

  As will be described later, when an AC voltage is applied to the commutator motor 100 by the AC power supply 30 (see FIG. 27), the current is rectified via one of the field windings 5a and 5b. It flows to one brush 60a in contact with the child 13 (see FIG. 26). A current flows through the armature winding 7 due to the sliding contact between the brush 60 a and the commutator 13. The current flowing through the armature winding 7 flows from the other brush 60b to the other field winding 5b to generate a field magnetic flux and an armature magnetic flux, and the commutator motor 100 generates torque (FIG. 27). reference).

  The commutator motor 100 of the present embodiment is operated at a rotational speed per minute of 36,000 rpm (rotational speed / minute) or more. The armature core 6 is provided with 22 slots 15 and 22 teeth 16 are also formed.

  Since the tooth portion 16 of each armature core 6 is switched 22 times per rotation, the switching frequency is 36,000 / 60 × 22 = 13,200 Hz or more.

  As a result, the iron loss generated in the armature 50 is dominated by eddy current loss rather than hysteresis loss. Moreover, the iron loss is very large, which causes a reduction in the efficiency of the motor.

  As shown in the longitudinal sectional view of the blower 1000 in FIG. 26, the blower 1000 includes at least a commutator motor 100, blades 11, and a fan cover 11a.

  The commutator motor 100 includes at least a field 40, an armature 50, bearings 12 a and 12 b, a frame 9, and a bracket 10. The frame 9 and the bracket 10 are made of, for example, a steel plate.

  Bearings 12 a and 12 b are provided in the vicinity of both ends of the output shaft 8 of the armature 50. A bearing 12 a is provided on the blade 11 side, and a bearing 12 b is provided on the opposite side of the blade 11.

  The field 40 is pressed into the frame 9 and fixed. The armature 50 having the bearings 12a and 12b attached in the vicinity of both ends of the output shaft 8 is inserted into the field 40 from the bearing 12b side.

  The bracket 10 is attached to the opening of the frame 9, and the bearing 12 a is supported by the bracket 10.

  Further, the blade 11 is fixed to the end of the output shaft 8 that protrudes from the bracket 10 to the outside.

  Further, a fan cover 11 a is attached to the outside of the blade 11.

  The blower 1000 is completed through the above steps. The frame 9 may be configured such that both ends in the axial direction are open and the bracket 10 is attached to each opening.

  A commutator motor 400 according to Modification 3 will be described with reference to FIGS. The modified commutator motor 400 is different from the commutator motor 100 of FIG. 1 in that the iron plates 26a and 26b, which are magnetic bodies, are fixed (embedded) in the stepped portions 21a and 21b of the field core 401 of the field 440. This is the point.

  In the case where the stepped portions 21a and 21b are simply provided (see, for example, FIG. 3, FIG. 5, and FIG. 12), the stepped portions 21a and 21b become an air layer (space). The resistance increases, and the electric current of the motor generally tends to increase.

  Here, after the field windings 5a and 5b are applied to the field iron core 401 of the field 440 by the above-described method, the iron plates 26a and 26b, which are magnetic bodies, are fixed (embedded) in the stepped portions 21a and 21b. Thus, the air layer of the stepped portions 21a and 21b can be filled with a magnetic material.

  Therefore, the circumferential length of the field windings 5a and 5b can be reduced, and an increase in the magnetic resistance of the field iron core 401 can be suppressed, and a more efficient commutator motor 400 can be obtained.

  A commutator motor 500 according to Modification 4 will be described with reference to FIGS. The commutator motor 500 according to the modification is different from the commutator motor 400 according to the modification 3 in FIG.

  As described above, since the switching frequency per revolution of the tooth portion 16 of the armature core 6 is 13,200 Hz or more, the eddy current loss is dominant in the iron loss generated in the armature 50, and similarly the field magnet A large eddy current loss is also generated on the end face of the inner diameter portion of the iron core 501 (here, described with the field iron core 501 of the commutator motor 500).

  In order to reduce eddy current loss, the armature core 6 and the field core 501 are configured by laminating a plurality of thin plates (for example, electromagnetic steel plates of about 0.1 to 1.0 mm), but the stepped portion 21a. , 21b is provided with a non-laminated iron plate, the efficiency of the electric motor is reduced due to the influence of eddy current loss generated in the iron plate.

  Here, by fixing the iron plates 26c, 26d fixed to the stepped portions 21a, 21b away from the inner surface of the field core 501 to the outer peripheral side, for example, about 0.1 to 1.0 mm, the armature 50, the eddy current is less likely to flow through the iron plates 26c and 26d, the increase in eddy current loss can be suppressed, and the increase in field magnetic resistance can be suppressed. Can be obtained.

  As shown in FIG. 25, the iron plate 26d is fixed to the outer peripheral side by a predetermined radial dimension r (for example, 0.1 to 1.0 mm) from the inner diameter portion of the field core 501.

  The magnetic material that fills the air layer of the stepped portions 21a and 21b may be a laminate of electromagnetic steel plates in addition to an iron plate, or a resin core obtained by solidifying a mixture of resin and iron powder. May be.

  The control circuit of the commutator motor 100 will be described with reference to FIG. The same applies to the control circuit of the commutator motors 200 to 500.

  In the control circuit of the commutator motor 100 shown in FIG. 27, the armature 50 is disposed between the two field windings 5a and 5b wound around the pair of magnetic pole portions 2a and 2b described in FIG. A power supply 30 and a triac 20 for performing phase control are connected in series. The armature 50 is connected to the field windings 5a and 5b via brushes 60a and 60b, respectively.

  The commutator motor 100 of the present embodiment is operated at a rotational speed of 36,000 rpm or more per minute. The armature core 6 is provided with 22 slots 15. The commutator 13 is also provided with 22 commutator pieces (not shown).

  The rectification operation of the armature winding 7 is switched 22 times per rotation. Therefore, the switching frequency is 36,000 rpm / 60 × 22 = 13,200 Hz, and the switching time is about 75 μsec. Thus, the current flowing through the armature winding 7 and the field windings 5a and 5b is rectified in a very short time.

  The current flowing through the commutator motor 100 is about 10 to 12 A (ampere) in terms of effective value.

  In addition, when the blower 1000 (see FIG. 26) using the commutator motor 100 is mounted on a vacuum cleaner, current control (air flow control) by a phase control (energization angle control) method using the triac 20 is performed. The suction power of the vacuum cleaner is controlled.

  In the phase control method for controlling the on / off of the AC voltage every half cycle of the AC power supply 30, the current flowing through the commutator motor 100 rises sharply after the voltage is turned on. The di / dt is very large.

  Particularly, when the phase angle during phase control is around 90 degrees, di / dt is the largest. When the current time change di / dt is increased, the rectifying sparks of the brushes 60a and 60b are increased at the switching timing of the rectification of the brushes 60a and 60b and the commutator 13, and the wear of the brushes 60a and 60b is accelerated. As a result, there is a problem that the brushes 60a and 60b are consumed in a short time and the commutator motor 100 cannot be operated.

  In the present embodiment, since the armature 50 is disposed between the two field windings 5a and 5b, the amount of sparks generated by the brushes 60a and 60b at the rectification switching timing can be suppressed, and the AC power source The conduction noise to 30 can be suppressed.

  As described above, according to the present embodiment, since the armature 50 is arranged between the two field windings 5a and 5b, the amount of sparks generated by the brushes 60a and 60b at the rectification switching timing is suppressed. The long-life commutator motors 100 to 500 can be obtained.

  As an application example of the present invention, there is a commutator motor mounted on a vacuum cleaner.

  1 field core, 2a magnetic pole part, 2b magnetic pole part, 3a yoke part, 3b yoke part, 5a field winding, 5b field winding, 6 armature core, 7 armature winding, 8 output shaft, 9 Frame, 10 Bracket, 11 Blade, 11a Fan cover, 12a Bearing, 12b Bearing, 13 Commutator, 14 Air gap, 15 Slot, 16 Teeth, 17 Shaft hole, 20 Triac, 21a Stepped portion, 21b Stepped portion, 22 Caulking part, 23 Insulating member, 24a guide, 24a-1 hole, 24b guide, 24b-1 hole, 25a clamper, 25b clamper, 26a Iron plate, 26b Iron plate, 26c Iron plate, 26d Iron plate, 30 AC power supply, 31a Iron core extraction plate 31b Iron core punch, 31c Iron core punch, 40 Field, 50 Armature, 60a Brush, 60b Brush, 100 Commutator motor, 00 commutator motor, 201 field iron core, 240 field magnet, 300 commutator motor, 301 field iron core, 340 field magnet, 400 commutator motor, 401 field iron core, 440 field magnet, 500 commutator motor, 501 field magnet Iron core, 540 field, 1000 blower.

Claims (6)

And the field magnetic in which the field winding has been facilities in the field core,
An armature that is disposed inside the field core via a gap, and in which an armature winding is provided in a slot of the armature core,
A stepped portion formed on at least one end surface of the magnetic core center portion of the field core in the stacking direction of the field core and recessed inward from the end surface in the stacking direction of the field core, the field core And a stepped portion in which a magnetic material is embedded after the field winding is applied to the commutator motor.   The field iron core is formed by laminating a plurality of core punched plates in which thin electromagnetic steel plates are punched into a predetermined shape, and the stepped portion is formed by stacking at least two types of the core punched plates. The commutator motor according to claim 1, wherein the commutator motor is formed. The magnetic material commutator motor according to claim 1 or 2, characterized in that arranged offset on the outer peripheral side than the inner diameter end face of the field core. The field winding is facilities is bisected into a pair of magnetic pole portions, in any one of claims 1 to 3 wherein the armature is connected between the divided the field winding, characterized in Rukoto The commutator motor described. At least a commutator motor according to any one of claims 1 to 4, the blower being characterized in that and a vane which is fixed to the armature of the commutator motor. A vacuum cleaner comprising the blower according to claim 5 .

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