JP2007116872A - Capacitor motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a capacitor motor which can be enhanced in electric motor efficiency, in which a tooth part obtained by dividing a stator core is constituted of a laminate core body formed by laminating a punched magnetic steel sheet while the remaining portion is constituted of a compressed magnetic core of magnetic powder. <P>SOLUTION: In the capacitor motor, a stator core 2 is divided into a divided core body a4 having the same number as the number of slots and mainly forming the tooth portion and a divided core body b6 which becomes a magnetic channel on the outer peripheral sides of the divided core body a4 and the slot 1 and forms a non-divided and annual yoke portion or a plurality of divided yoke portions, and the divided core body a4 formed by laminating a punched magnetic steel sheet and the divided core body b6 obtained by forming the compressed powder magnetic core obtained by molding the magnetic powder in a predetermined shape, both are bonded or welded or simply mechanically assembled or integrated through combination of these methods. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is configured by separating and dividing the number of slots equal to or more than the number of slots, combining a laminated iron core body obtained by punching and laminating electromagnetic steel sheets, and a dust core made of magnetic powder and formed into a predetermined shape, The present invention relates to a condenser motor having a structure including a stator iron core and a stator that are combined.

  Conventionally, this type of electric motor has an armature core (stator iron core, hereinafter the same) divided into a plurality of parts, each part is made of magnetic powder, and a stator tooth (a tooth part, the same hereinafter) has a coil (winding, hereinafter the same). After the construction, a structure is known in which the tooth part is integrated with an annular armature yoke (a yoke part, hereinafter the same) (see, for example, Patent Document 1).

  Hereinafter, the configuration of the electric motor will be described with reference to FIG.

  As shown in the figure, it is composed of a soft magnetic material made of an insulating material (magnetic powder, hereinafter the same) or a separate part in which a winding is wound directly around a winding 201 winding part. The stator is composed of a plurality of tooth portions 202 and a yoke portion 203 composed of magnetic powder and connecting the tooth portions, and has a stator core 204 formed by combining them. .

  Also, in this type of electric motor, a stator comprising a stator iron core using a laminated iron core body obtained by punching and stacking magnetic steel sheets from a stator iron core and a dust core using magnetic powder, and a method for manufacturing the same Has been proposed (see, for example, Patent Document 2).

  Hereinafter, the configuration of the electric motor will be described with reference to FIG.

  As shown in the figure, a powdery core structure formed of a composite material of a steel sheet core structure (laminated iron core body, hereinafter the same) 301 formed by laminating steel sheets, a magnetic powder, and an insulating member. (Powder magnetic core, hereinafter the same) 302 is joined, and both ends in the stacking direction of the laminated iron core body 301 are sandwiched by a pair of dust cores 302, and each is joined. It was a core (stator iron core, hereinafter the same).

Also, as shown in FIG. 18, when the stator iron core is made of magnetic powder, the dimensions of each part, for example, the width K of the tooth part is generally larger than that of a laminated electromagnetic steel sheet. Met.
JP 09-215230 A JP 2004-201483 A

  In such a conventional electric motor stator core or stator configuration, part or the whole of the tooth portion around which the winding is wound is formed of a magnetic powder powder core having a low magnetic flux density. In order to secure a predetermined amount of magnetic flux, the cross-sectional area (the axial length of the tooth portion x the width dimension) needs to be made larger by the ratio of the laminated iron core, and as a result, the winding wound around the tooth portion Since the circumference becomes long and the loss consumed by the windings becomes large, there is a problem that the efficiency of the electric motor is lowered.

  The present invention solves such a conventional problem, and the tooth portion formed by dividing the stator iron core is composed of a laminated iron core body obtained by punching and laminating electromagnetic steel sheets, and the remaining portion is made of magnetic powder. An object of the present invention is to provide a capacitor motor that can improve the motor efficiency by being constituted by a dust core.

  In order to achieve the above object, the capacitor motor according to the present invention includes a split iron core body a in which the stator iron core is mainly formed with the same number of slots as the number of slots, and the outer periphery of the split iron core body a and the slots. A split iron core a formed by punching and laminating electromagnetic steel sheets and dividing into a non-divided annular yoke portion or a divided iron core body b forming a plurality of divided yoke portions. And a divided iron core body b formed of a powder magnetic core having a high degree of freedom of shape obtained by molding magnetic powder into a predetermined shape, by bonding, welding, mere mechanical assembly, or a combination of these, etc. It becomes the composition which becomes.

  By this means, it is possible to provide a capacitor motor that can prevent an increase in winding circumference and an increase in the circumference of the tooth portion around which the winding is wound, and improve the motor efficiency.

  The other means is configured to have a stator iron core in which the axial thickness of the divided iron core body b is longer than the portion where the winding of the tooth portion is mounted or wound.

  By this means, it is possible to prevent an increase in the magnetic path cross-sectional area of the tooth portion around which the winding is wound and an increase in the winding circumferential length, and at the same time, increase the magnetic path cross-sectional area of the yoke portion without increasing the outer diameter of the stator core. By expanding, it is possible to provide a capacitor motor that can reduce the magnetic flux density and improve the motor efficiency.

  Another means is to mount the A-phase winding and the B-phase winding on the front and back surfaces of the split iron core a formed of a laminated iron core of the stator iron core, excluding the side surface constituting the slot. Alternatively, by adding a split iron core body c made of a powder magnetic core or a laminated electrical steel sheet except for the portion to be wound by direct winding, the magnetic path area (cut off) is compared with the portion to which these windings are mounted or directly wound. The circumference of the winding is not enlarged while the area is enlarged.

  By this means, it is possible to provide a capacitor motor capable of reducing the average magnetic flux density of all the magnetic paths by reducing the magnetic flux density of the magnetic path cross-sectional area of the portion where the winding is not wound, and improving the motor efficiency. it can.

  Further, the other means is configured to have a rotor iron core in which iron cores having an axial thickness of approximately the same size as the longest axial thickness of the stator iron core including the dust core are laminated. It is.

  By this means, it is possible to provide a capacitor motor that can reduce the magnetic flux density in the magnetic path of the rotor core portion and improve the motor efficiency.

  Further, the other means includes a rotor iron core in which iron cores having a length in the axial direction that is approximately the same as the axial thickness of the rotor-facing surface of the tooth portion that forms the stator iron core are stacked. It is what.

  This means reduces the magnetic flux density in the magnetic path of the rotor iron core part and reduces the magnetic flux density in the gap part between the rotor iron core and the stator iron core, thereby improving the motor efficiency. Can be provided.

  According to the present invention, it is possible to provide a capacitor motor that can increase the cross-sectional area of the tooth portion around which the winding is wound and increase the winding peripheral length and improve the motor efficiency.

  In addition, increase in magnetic path cross-sectional area and increase in winding circumference of the tooth portion winding the winding is prevented, and at the same time, the magnetic path cross-sectional area of the yoke portion is increased without increasing the outer diameter of the stator core. Thus, it is possible to provide a capacitor motor that can reduce the magnetic flux density and improve the motor efficiency.

  In addition, it is possible to provide a capacitor motor that can reduce the average magnetic flux density of all magnetic paths by reducing the magnetic flux cross-sectional area of the portion where the winding is not wound, thereby improving the motor efficiency.

  Moreover, the capacitor | condenser motor which can reduce the magnetic flux density in the magnetic path of a rotor iron core part, and can improve motor efficiency can be provided.

  Also provided is a capacitor motor that can reduce the magnetic flux density in the magnetic path of the rotor iron core part and reduce the magnetic flux density in the gap part between the rotor iron core and the stator iron core to improve the motor efficiency. it can.

  In the capacitor motor according to claim 1 of the present invention, the stator iron core is divided into the same number as the number of slots, and the divided iron core body a that mainly forms teeth, and the divided iron core body a and the outer peripheral side of the slot. A split iron core a formed by punching and laminating electromagnetic steel sheets, and a magnetic path to be divided into a non-divided annular yoke portion or a divided iron core body b forming a plurality of divided yoke portions, A structure in which a divided iron core body b formed of a dust core having a high degree of freedom of shape obtained by molding magnetic powder into a predetermined shape is combined by bonding, welding, simple mechanical assembly, or a combination of these. Thus, it is possible to prevent the winding circumference from increasing with the increase in the cross-sectional area of the tooth portion around which the winding is wound, thereby improving the motor efficiency.

  The capacitor motor according to claim 2 of the present invention includes a stator iron core in which the axial thickness of the split iron core body b is longer than a portion where the winding of the tooth portion is mounted or wound. The magnetic path cross-sectional area of the yoke part can be prevented without increasing the magnetic path cross-sectional area and winding circumference of the tooth part winding the winding, and at the same time increasing the outer diameter of the stator core. The magnetic flux density can be reduced and the motor efficiency can be improved.

  Further, the capacitor motor according to claim 3 of the present invention is the A phase on the front and back surfaces of the divided iron core body a formed by the laminated iron core body of the stator iron core, excluding the side surface constituting the slot. A split iron core body c made of a dust core or a laminated electromagnetic steel sheet is added except for a portion where the winding and the B-phase winding are mounted or directly wound, so that these windings are mounted or directly wound. While the magnetic path area (cross-sectional area) is enlarged compared to the part, the circumference of the winding is not enlarged, and the magnetic path cross-sectional area of the part not wound with the winding is reduced in magnetic flux density. Thus, the average magnetic flux density of all the magnetic paths can be reduced, and the motor efficiency can be improved.

  According to a fourth aspect of the present invention, there is provided a capacitor motor in which an iron core having an axial thickness that is substantially the same dimension as the longest axial thickness of a stator iron core including a dust core is laminated. It has a configuration having a child iron core, and can reduce the magnetic flux density in the magnetic path of the rotor iron core portion and improve the motor efficiency.

  According to a fifth aspect of the present invention, there is provided a capacitor transmitter having an axial thickness that is substantially the same as the axial thickness of the rotor-facing surface of the teeth that form the stator core. The structure has a rotor core with a laminated structure, reducing the magnetic flux density in the magnetic path of the rotor core, and reducing the magnetic flux density in the gap between the rotor core and stator core. In addition, the motor efficiency can be improved.

(Embodiment 1)
As shown in FIG. 1 to FIG. 10, the capacitor motor of the present invention includes eight stator cores 2 each having eight slots 1, each of which has eight divided iron cores a <b> 4 that mainly form teeth 3. It divides | segments into the division | segmentation iron core body a4 and the division | segmentation iron core body b6 which forms a magnetic path as the yoke part 5 in the outer peripheral side of the slot 1. FIG. Each of the divided iron cores a4 is formed by punching and laminating electromagnetic steel plates, and each tooth portion 3 is provided with an A-phase winding 8 or a B-phase winding 9 wound around an insulating bobbin 7. The divided iron core body a4 to which the A-phase winding 8 is mounted and the divided iron core body a4 to which the B-phase winding 9 is mounted are arranged alternately and annularly. The divided iron core body b6 is disposed on the outer peripheral portion and is formed of a dust core obtained by molding magnetic powder into a predetermined shape. The divided iron core body a4 and the divided iron core body b6 are combined by bonding, welding, mere mechanical assembly, a combination thereof, or the like to form the stator 10.

  Moreover, as shown in FIGS. 6-9, the division | segmentation iron core b6 is a part or all of the yoke part 5 which forms a magnetic path in the outer peripheral side of the division | segmentation iron core a4 which stamped and laminated | stacked the electromagnetic steel plate. The other yoke part 5 has a configuration in which the magnetic powder is formed into a predetermined shape and is formed of a dust core.

  Moreover, as shown in FIGS. 6-7, the division | segmentation iron core body a4 is united with the convex part 12 provided in the division | segmentation iron core body b6 by setting it as the shape which has the recessed part 11 on the both sides of the circumferential direction. It is.

  FIGS. 5 and 7 show a configuration in which the divided iron core body b6 of FIGS. 4 and 6 is divided into a plurality of parts.

  In the above configuration, when the divided iron core body a4 that mainly forms the tooth portion 3 and mounts or winds the winding is formed by punching and laminating electromagnetic steel sheets, a part or all of it is made of magnetic powder Compared to the above, the magnetic path cross-sectional area may be small. Therefore, the peripheral length of the A-phase winding 8 or the B-phase winding 9 attached or wound on the tooth portion 3 is shortened, and the loss consumed in the winding due to the decrease in the resistance value of the winding. Reduces the motor efficiency.

  Moreover, the division | segmentation iron core body a4 and the division | segmentation iron core body b6 can be united and assembled only by press fitting.

  Further, it is possible to reduce the size of the mold for molding the divided iron core body b6 made of magnetic powder.

  In the present embodiment, the number of slots of the stator iron core is eight. However, any number may be used, and the insulation between each phase winding and the stator iron core is based on an insulating bobbin. It is also possible to use powders.

(Embodiment 2)
A second embodiment will be described with reference to FIGS. The same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  11 and 12, the difference from the first embodiment is that the magnetic steel sheet is punched and laminated with the axial thickness N of the split iron core body b6A formed of a dust core formed by molding magnetic powder into a predetermined shape. This is a point provided longer than the axial thickness L of the tooth portion 3 of the divided iron core body a4, that is, the portion where the winding is mounted or wound. Further, a rotor 14 having a rotor iron core 13 which is coaxially and rotatably held in the inner diameter portion of the stator iron core 2 and has the same axial thickness as the divided iron core body b6A is disposed. The

  In the above configuration, a split iron core b6A having a high degree of freedom of shape formed by a powder magnetic core formed by forming a magnetic path as the yoke portion 5A at the outer peripheral portion of the stator iron core 2 and molding magnetic powder into a predetermined shape. Is the length in the axial direction of the tooth portion 3 of the divided iron core a4 formed by punching and laminating electromagnetic steel sheets and mounting or winding the A-phase winding 8 or the B-phase winding 9 thereon. By making it longer than L, the magnetic path cross-sectional area of the divided iron core b6A as the yoke portion 5A can be increased, the magnetic flux density can be reduced, and the motor efficiency can be improved.

  Further, as shown in FIG. 13, by configuring the split iron core body b6A to have a longer axial dimension Q, the outer diameter dimension of the split iron core body b6A can be reduced, and the stator core By reducing the outer diameter of 2A or the stator 10A, the total outer diameter of the motor can be reduced.

  Further, the magnetic flux density in the magnetic path of the rotor iron core 13 can be reduced and the motor efficiency can be improved.

(Embodiment 3)
A third embodiment will be described with reference to FIGS. The same components as those in the first and second embodiments are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIGS. 14 to 15, the difference from the first embodiment and the second embodiment is that the divided iron core b6 formed of a powder magnetic core obtained by molding the magnetic powder of the second embodiment into a predetermined shape. In addition to having a configuration in which the axial thickness is longer than the axial thickness of the toothed portion 3 of the divided iron core body a4 obtained by punching and laminating electromagnetic steel sheets, that is, the portion where the winding is mounted or wound, For the portions where the windings of the divided iron core body a4 are not mounted or wound, such as the front and back surfaces in the axial direction on the outer peripheral side of each divided iron core body a4, and the front and back surfaces in the axial direction of the tip portion on the inner peripheral side This is also a point in which a divided iron core body c15 having a high degree of freedom of shape formed by a powder magnetic core obtained by molding magnetic powder into a predetermined shape is added.

  A rotor 11 having a rotor core 13 held coaxially and rotatably is disposed on the inner diameter portion of the stator core 2. The divided iron core body a4 is added with a divided iron core body c15 formed of a dust core or a laminated electromagnetic steel sheet obtained by molding magnetic powder into a predetermined shape. The axial thickness N of the divided iron core body a4 to which the divided iron core body c15 is added and the axial thickness (O, P) of the rotor iron core 13 are provided with the same size.

  In the above configuration, the magnetic force added to the portion where the winding is not mounted or wound, such as the front and back surfaces in the axial direction on the outer peripheral side of each divided iron core a4 and the front and back surfaces in the axial direction of the tip portion on the inner peripheral side. The divided iron core body c15 of the powder magnetic core obtained by molding the powder into a predetermined shape has an effect of reducing the magnetic flux density of the magnetic path, and can improve the motor efficiency.

  In addition, the magnetic flux density in the magnetic path of the rotor iron core 13 portion and the magnetic flux density in the gap 16 (not shown) portion between the rotor iron core 13 and the stator iron core 2 can be reduced to improve the motor efficiency. .

  In the above embodiment, the stator iron core has eight slots. However, the effect of the present invention is not limited to the number of slots. In addition to the capacitor motor, the present invention is also effective for other motors in which windings are wound by concentrated winding.

  The capacitor motor according to the present invention can improve the motor efficiency and reduce the size of the motor, and can be applied to an electric motor used for fan blowing of small household appliances such as a fan and a ventilation fan.

The perspective view which shows the stator iron core of the capacitor | condenser motor of Embodiment 1 of this invention Partial sectional view showing the stator of the capacitor motor X1-X2 cross section of the stator of the same capacitor motor Front view showing the stator core of the capacitor motor The front view which shows the stator iron core which divided | segmented and further divided | segmented the division | segmentation iron core body b of the stator of the capacitor | condenser motor The front view which shows the stator iron core comprised by fitting the recessed part of the division | segmentation iron core body a and the convex part of the division | segmentation iron core body b of the capacitor | condenser motor. The front view which shows the stator core of the structure which comprised the recessed part of the division | segmentation iron core body a and the convex part of the division | segmentation iron core body b of the capacitor | condenser motor, and comprised the stator core b further divided | segmented The front view which shows the stator iron core which consists of the division | segmentation iron core body a and the division | segmentation iron core body b of a different division structure of the same capacitor motor The front view which shows the stator iron core which consists of the division | segmentation iron core body a and the division | segmentation iron core body b of a different division structure of the same capacitor motor Sectional drawing which shows the state which divided | segmented the stator of the capacitor | condenser motor into the circumferential direction The perspective view which shows the stator core of the capacitor | condenser motor of Embodiment 2 of this invention Half sectional view showing a state in which the stator and rotor of the capacitor motor are divided in the radial direction Half sectional view showing a state where the stator of the capacitor motor is divided in the radial direction The half sectional view which shows the state which divided | segmented the stator and rotor of the capacitor | condenser motor of Embodiment 3 of this invention into radial direction Half sectional view showing a state in which the stator and rotor of the capacitor motor are divided in the radial direction Plan view showing a stator of a conventional capacitor motor A perspective view showing a stator iron core of another capacitor motor Plan view showing the stator core of another capacitor motor

Explanation of symbols

1 Slot 2 Stator Core 2A Stator Core 3 Tooth 4 Split Iron Core a
5 yoke part 5A yoke part 6 split iron core body b
6A split iron core b
7 Insulating bobbin 8 A phase winding 9 B phase winding 10 Stator 11 Concave portion 12 Convex portion 12A Convex portion 13 Rotor core 14 Rotor 15 Split iron core c
16 Air gap

Claims (5)

Stator iron core
A split iron core a that mainly forms teeth with the same number of slots;
The divided iron core body a and the divided iron core body b which forms a magnetic path on the outer peripheral side of the slot and forms a non-divided annular yoke portion or a plurality of divided yoke portions,
The split iron core a is formed by punching and laminating electromagnetic steel sheets,
The divided iron core b is formed of a powder magnetic core having a high degree of freedom in shape obtained by molding magnetic powder into a predetermined shape,
The segmented iron core body a and the segmented iron core body b are capacitor motors configured to be combined by bonding, welding, simple mechanical assembly, or a combination of these. The capacitor | condenser motor of Claim 1 which has the stator iron core which provided the axial direction thickness of the division | segmentation iron core body b longer than the part which mounts | wears with or winds the coil | winding of a tooth | gear part. A phase winding and B phase winding are mounted or directly wound on the front and back surfaces of the divided iron core a formed of a laminated iron core of the stator iron core, excluding the side surfaces constituting the slot. By adding a split iron core c made of a powder magnetic core or laminated magnetic steel sheet except for the portion, the magnetic path area (cross-sectional area) is expanded as compared with the portion where these windings are mounted or directly wound. The capacitor motor according to claim 1, further comprising a stator iron core configured such that the circumference of the winding does not increase. The capacitor | condenser motor in any one of Claims 1-3 of the structure which has the rotor iron core which laminated | stacked the iron core of the length of the axial direction thickness substantially the same dimension as the longest part of the axial thickness of a stator iron core. 4. A structure having a rotor iron core in which iron cores having axial lengths substantially the same as the axial thickness of the rotor-facing surfaces of the teeth forming the stator iron core are laminated. The capacitor motor according to any one of the above.

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