WO2021182052A1 - Moteur à courant alternatif - Google Patents

Moteur à courant alternatif Download PDF

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Publication number
WO2021182052A1
WO2021182052A1 PCT/JP2021/006039 JP2021006039W WO2021182052A1 WO 2021182052 A1 WO2021182052 A1 WO 2021182052A1 JP 2021006039 W JP2021006039 W JP 2021006039W WO 2021182052 A1 WO2021182052 A1 WO 2021182052A1
Authority
WO
WIPO (PCT)
Prior art keywords
core
winding
wall
auxiliary
insulator
Prior art date
Application number
PCT/JP2021/006039
Other languages
English (en)
Japanese (ja)
Inventor
洸太郎 森
康仁 塩谷
Original Assignee
パナソニックＩｐマネジメント株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Priority to CN202180018968.5A priority Critical patent/CN115210996A/zh
Priority to JP2022505876A priority patent/JP7198988B2/ja
Publication of WO2021182052A1 publication Critical patent/WO2021182052A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K17/00—Asynchronous induction motors; Asynchronous induction generators
    • H02K17/02—Asynchronous induction motors
    • H02K17/04—Asynchronous induction motors for single phase current
    • H02K17/08—Motors with auxiliary phase obtained by externally fed auxiliary windings, e.g. capacitor motors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
    • H02K3/16—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots for auxiliary purposes, e.g. damping or commutating
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/28—Layout of windings or of connections between windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/32—Windings characterised by the shape, form or construction of the insulation
    • H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto

Definitions

  • the present invention relates to an AC motor.
  • Patent Document 1 As an example, the technology disclosed in Patent Document 1 will be described.
  • the stator (stator) of a single-phase induction motor (AC motor) is equipped with a core and multiple coils (windings), and is provided from an annular core bag (joint iron part) centered on a vertically extending central axis and a core back. It consists of a plurality of teeth (tooth bases) extending inward in the radial direction and a plurality of coils wound around the plurality of teeth. As shown in FIG. 8, the coil includes a main winding 8000 and three types of auxiliary windings (first auxiliary winding 8100, second auxiliary winding 8200, third auxiliary winding 8300).
  • the main winding 8000 is formed by winding a continuous conducting wire (conductive wire) around every other teeth 6100 while reversing the direction of winding
  • the first auxiliary winding 8100 is formed by winding the main winding 8000 1 It is formed by being wound around the teeth 6100 located in the middle of every other teeth 6100 while reversing the direction of winding.
  • two or more second and third auxiliary windings 8200 and 8300 are lapped around either the main winding 8000 or the first auxiliary winding 8100.
  • a plurality of entwining pins terminal pins
  • the start or end of the main winding 8000, or the start or end of the first auxiliary winding 8100 and the plurality of auxiliary windings 8200 and 8300 wound in layers are entwined with the entanglement pin one by one. ..
  • a speed adjustment function speed adjustment function
  • insulators have become thinner in recent years. The purpose of this is to increase the number of windings of the winding that can be wound around the core by thinning the insulator. As a result, the amount of magnetic flux generated when a current flows through the winding increases, and even an AC motor of the same size can generate a larger torque.
  • the number of terminal pins that can be provided in the insulator is limited due to the thinning of the insulator, and the number of speed adjustments, that is, the number of adjustable speeds is reduced.
  • the AC motor according to the present invention has a core, a stator having an insulator, a winding and a terminal pin, and a rotor provided on the inner circumference of the stator.
  • the core includes a main core and an auxiliary core, and is formed in an annular shape in which the main core and the auxiliary core are alternately connected in the circumferential direction.
  • the windings are wound over one of a main winding, an auxiliary winding that is annularly routed to the auxiliary core, and either the main winding or the auxiliary winding, and a predetermined winding. It is provided with a fast tuning line routed in a ring shape from the core A to the core B different from the core A.
  • the fast-tuning wire has a configuration in which at least one of the start end and the end is connected to a terminal pin provided on an insulator corresponding to the core C, which is different from the core A and the core B, thereby achieving the intended purpose. It is a thing.
  • FIG. 1 is a development view of an AC motor according to an embodiment of the present invention.
  • FIG. 2 is a perspective view of a stator according to an embodiment of the present invention.
  • FIG. 3 is a perspective view of the core according to the embodiment of the present invention.
  • FIG. 4 is a perspective view of an insulator according to an embodiment of the present invention.
  • FIG. 5 is a perspective sectional view of the stator according to the embodiment of the present invention.
  • FIG. 6 is a cross-sectional view of the stator according to the embodiment of the present invention.
  • FIG. 7 is a simplified view of the winding specifications according to the embodiment of the present invention.
  • FIG. 8 is a diagram showing windings in a conventional single-layer induction motor.
  • FIG. 1 is a development view of the AC motor 10.
  • the AC motor 10 is a motor that rotates by applying an AC voltage (single-phase AC) obtained from, for example, a general household outlet, and is used for a ventilation fan, an air purifier, a humidifier, a blower, and the like.
  • the AC motor 10 includes a stator 1, a rotor 2, and housings 3a and 3b.
  • the stator 1 generates a magnetic flux by supplying an electric current from the outside, and generates a rotational force with respect to the rotor 2. The details of the stator 1 will be described later.
  • the rotor 2 rotates around the central axis 11 with the rotational force obtained from the stator 1, and the power obtained by the rotational movement is transmitted to the outside of the AC motor 10 via the shaft 21.
  • the rotor 2 includes a shaft 21, a die-cast portion 22, and a bearing 23.
  • the shaft 21 is a rotating shaft formed of a carbon steel material, a stainless steel material, or the like, and transmits the power of the rotor 2 to the outside.
  • the shaft 21 has a cylindrical rod shape and is concentric with the central shaft 11.
  • the shaft 21 is press-fitted and fixed in a hole having substantially the same diameter as the shaft diameter made in the die-cast portion 22.
  • the central axis 11 is an axis extending in the axial direction of the AC motor 10 and is the center of rotational motion.
  • the die-cast portion 22 includes a plurality of electromagnetic steel sheets laminated in the same direction as the central shaft 11, that is, in the extending direction of the central shaft 11, and a cage-shaped conductor made of aluminum or the like.
  • a cage-shaped conductor made of aluminum or the like.
  • the bearing 23 has a hollow circular shape concentric with the shaft 21 and supports the rotating shaft 21.
  • the inner diameter of the bearing 23 is substantially the same as the diameter of the shaft 21, and two die-cast portions 22 are press-fitted and fixed to the shaft 21 so as to be sandwiched from both sides of the shaft 21.
  • the housings 3a and 3b are outer shells having an internal space having substantially the same diameter as the outer diameter of the stator 1 and having a bottomed cylindrical shape for holding the stator 1 in the internal space.
  • the housing 3a stores the stator 1 from one side in the axial direction of the stator 1 with the top opening in the bottomed cylindrical shape facing the stator 1.
  • the housing 3b has substantially the same shape as the housing 3a, and also has the top opening facing the stator 1 and stores the stator 1 from the other side in the axial direction of the stator 1. As a result, the stator 1 and the rotor 2 are stored in the housings 3a and 3b.
  • FIG. 2 is a perspective view of the stator 1
  • FIG. 3 is a perspective view of the core 5.
  • the stator 1 includes a core 5, an insulator 6, a winding 7, a terminal pin 8, and a substrate 9.
  • the core 5 has a structure in which a plurality of electromagnetic steel plates are laminated in the same direction as the central axis 11, and forms a path of magnetic flux generated by passing an electric current through the winding 7, that is, a magnetic circuit.
  • the core 5 is formed in a ring shape by integrally connecting a plurality of divided cores 51, or is formed in a ring shape by connecting a plurality of independent divided cores 51.
  • the split core 51 includes a joint iron portion 511, a tooth base portion 512, and a collar portion 513.
  • the joint iron portion 511 is provided on the outer peripheral side of the split core 51 and forms the outer peripheral surface of the core 5.
  • the tooth base portion 512 protrudes from the joint iron portion 511 to the inner peripheral side, and has a rectangular shape in a cross section perpendicular to the central axis 11.
  • the collar portion 513 protrudes from the tip portion on the inner peripheral side of the tooth base portion 512 to both sides in the circumferential direction.
  • the thickness of the collar portion 513 becomes thinner in the radial direction from the central axis 11 as the distance from the tip portion on the inner peripheral side of the tooth base portion 512 increases.
  • the collar portion 513 does not come into contact with the adjacent collar portion 513, but forms the inner peripheral surface of the core 5.
  • the insulator 6 is a resin molded product of an insulating material, and is a space formed by a winding portion of a core 5 having a cylindrical shape, that is, an inner peripheral side of a tooth base portion 512 and a joint iron portion 511 and an outer peripheral side of a flange portion 513. Has a shape that covers from the inner circumference.
  • the insulator 6 plays a role of electrically insulating the core 5 and the winding 7 by winding the winding 7 around a plurality of divided cores 51 via the insulator 6. Like the core 5, the insulator 6 forms a ring shape corresponding to the divided core 51.
  • the winding 7 is a conductive wire mainly made of an alloy of copper or aluminum, and is wound around a core 5 provided with an insulator 6.
  • the winding specifications differ depending on the required specifications.
  • the terminal pin 8 is mainly formed of a conductive material, and is installed on the upper surface of the insulator 6, that is, on the surface facing the substrate 9 in parallel with the central axis 11.
  • the terminal pin 8 is electrically connected to the substrate 9 by solder or the like, and the start end or the end of the winding 7 is entwined to mediate the electrical connection between the substrate 9 and the winding 7.
  • the position of the terminal pin 8 on the insulator 6 is determined in consideration of the legal insulation distance from the housing 3a.
  • the board 9 connects an external inverter circuit or the like to the winding 7 by connecting a plurality of electrical contacts, and enables current supply to the winding 7.
  • the substrate 9 includes a plurality of electrical contacts, a land 92, and a through hole 91.
  • Land 92 is a copper foil that connects a plurality of electrical contacts so that they can be energized.
  • the through hole 91 is a through hole made in the substrate 9 for penetrating the terminal pin 8.
  • the substrate 9 is contoured by a part of a hollow circle having a central angle of about 160 degrees, is concentric with the central axis 11, and is predetermined on a plane perpendicular to the central axis 11 in the direction from the central axis 11 to the core 5. It is placed at a distance.
  • the substrate 9 is placed on the outer peripheral portion of the insulator 6 on the top surface side.
  • FIG. 4 is a perspective view of the insulator 6.
  • the insulator 6 includes an inner wall 62, an outer wall 63, a connecting portion 64, and a protruding portion 65.
  • the inner wall 62 is located on the inner peripheral side of the insulator 6 formed in an annular shape.
  • the inner wall 62 is adjacent to the outer peripheral side of the tooth base portion 512 of the split core 51 and covers the outer peripheral surface of the tooth base portion 512.
  • the inner wall 62 includes a pin fixing portion 61.
  • the pin fixing portions 61 are holes provided on both sides of the inner wall 62 in the circumferential direction to fix the terminal pins 8.
  • a terminal pin 8 for supplying a current to the winding 7 is press-fitted and fixed to the pin fixing portion 61.
  • the pin fixing portion 61 has a shape protruding from the upper surface of the insulator 6 in parallel with the central shaft 11 and protruding from the outer peripheral surface of the flange portion 513 in the radial direction from the central shaft 11. Therefore, by hooking the winding 7 on the inner peripheral side of the pin fixing portion 61, the winding 7 is supported to cross the adjacent insulator 6.
  • the outer wall 63 is located on the outer peripheral side of the insulator 6 formed in an annular shape.
  • the outer wall 63 is adjacent to the inner peripheral side of the joint iron portion 511 of the split core 51 and covers the inner peripheral surface of the joint iron portion 511.
  • the space between the inner wall 62 and the outer wall 63 is a space around which the winding 7 is wound, and the wider the space is, the more winding amount can be increased, and a high output motor can be designed. Therefore, the thickness of the insulator that reduces the thickness of the inner wall 62 or the outer wall 63 is being reduced.
  • the outer wall 63 can be made thinner than the inner wall 62, and the winding amount can be increased in the outer peripheral direction.
  • the thickness of the outer wall 63 is thinner than the outer peripheral diameter of the pin fixing portion, and the terminal pin 8 cannot be fixed. Further, providing the terminal pin 8 on the inner wall 62 makes it unnecessary to secure the legal insulation distance between the terminal pin 8 and the housing 3a, which contributes to the miniaturization of the motor.
  • the connecting portion 64 connects the inner wall 62 and the outer wall 63 and covers the tooth base 512 of the core 5.
  • the connection portion 64 includes a through hole 66.
  • the through hole 66 is a through hole for covering the tooth base 512 of the split core 51.
  • the through hole 66 is a space for connecting the inner wall 62 and the outer wall 63, and the tooth base portion 512 is located there.
  • the protruding portion 65 has a shape that protrudes from the upper surface of the insulator 6 in parallel with the central axis 11 and protrudes from the inner wall 62 in the radial direction from the central axis 11. Therefore, by hooking the winding 7 on the shape portion protruding in the radial direction from the central axis 11 of the protruding portion 65, the winding 7 is supported to cross the adjacent insulator 6. As a result, the winding 7 can be routed along the ring of the insulator 6 and the cutting of the winding 7 is suppressed.
  • the back surface of the substrate 9 is located on the upper surface of the protrusion 65, and determines the positional relationship between the substrate 9 and the winding 7.
  • FIG. 5 is a perspective sectional view of the stator 1.
  • the terminal pins 8a and terminal pins 8b provided on the insulator 6 are inserted into the through holes 91 of the substrate 9 placed on the top surface side of the insulator 6, and soldered and fixed to the lands 92 on the substrate 9. .
  • the insulation distance 81 between the terminal pin 8a and the terminal pin 8b is the shortest distance from the land end to which the terminal pin 8a is soldered to the land end to which the terminal pin 8b is soldered. Therefore, the smaller the motor, the more difficult it is to maintain the insulation distance 81 between the terminal pins 8 on both sides in the circumferential direction, which is provided on the inner wall 62 of the insulator 6 corresponding to one divided core.
  • the distances of the terminal pins 8 provided in one divided core are shortened, so that the insulating distance 81 is also shortened, and as a result, a plurality of terminal pins 8 cannot be provided. Therefore, the number of terminal pins 8 provided in one divided core is limited.
  • FIG. 6 is a cross-sectional view of the stator 1 on a plane perpendicular to the central axis
  • FIG. 7 is a simplified view of winding specifications.
  • the divided core 51 of the core 5 is formed by a plurality of main cores 52 and a plurality of auxiliary cores 53.
  • the core 5 forms an annular shape in which the main core 52 and the auxiliary core 53 are alternately connected in the circumferential direction.
  • the main core 52 is every other divided core 51 among the divided cores 51 arranged continuously in an annular shape.
  • the auxiliary core 53 is every other divided core 51 that is in the middle of the main core 52 among the divided cores 51 that are continuously arranged in an annular shape.
  • the main core 52 and the auxiliary core 53 are names for convenience, and their physical shapes and characteristics are not different. Further, the main cores 52 and the auxiliary cores 53 are not adjacent to each other, that is, the core 5 is composed of an even number of divided cores 51.
  • the winding 7 includes a main winding 72, an auxiliary winding 73, and a speed control wire 74.
  • the main winding 72 is formed by winding continuous conductive wires around every other main core 52 in an annular shape while reversing the winding direction for each main core 52.
  • the auxiliary winding 73 is formed in an annular shape by reversing the winding direction of a continuous conductive wire around an auxiliary core 53 located in the middle of every other main core 52 around which a plurality of main windings 72 are wound. It is routed and formed.
  • the speed control wire 74 is lapped around either the main winding 72 or the auxiliary winding 73, and is wound in an annular shape while reversing the winding direction, like the main winding 72 and the auxiliary winding 73. .. Further, since the speed control line 74 is routed by the speed control number, the speed control number + 1 terminal pin 8 is required. Here, the speed control wire 74 is lapped around the auxiliary winding 73.
  • the main winding 72 is first entwined with the terminal pin 8a and wound around the main core 52a. Then, from the main core 52a, the main core 52b, the main core 52c, and the main core 52d are drawn in this order while reversing the winding direction. Finally, the main winding 72 is entwined with the terminal pin 8e.
  • auxiliary winding 73 is first entwined with the terminal pin 8b and wound around the auxiliary core 53a. Then, from the auxiliary core 53a, the auxiliary core 53b, the auxiliary core 53c, and the auxiliary core 53d are drawn in this order while reversing the winding direction. Finally, the auxiliary winding 73 is entwined with the terminal pin 8g.
  • the speed adjustment wire 74 is started to be wound by using the same conductive wire as the auxiliary winding 73 entwined with the terminal pin 8g.
  • the speed control wire 74 (74a) is already wound in the order of the auxiliary core 53d, the auxiliary core 53c, the auxiliary core 53b, and the auxiliary core 53a from the terminal pin 8g in which the end of the auxiliary winding 73 is entwined. It is wound and routed in the same direction as the winding 73. Then, the speed adjustment wire 74 is entwined with the terminal pin 8c. Therefore, the speed control wire 74 is wound around the auxiliary winding 73 once, so that the speed control number is 2.
  • the speed control wire 74 (74b) is wound from the terminal pin 8c in the order of the auxiliary core 53a, the auxiliary core 53b, the auxiliary core 53c, and the auxiliary core 53d in the same direction as the auxiliary winding 73 that has already been wound. , Be routed. Then, it is entwined with the terminal pin 8f. Therefore, the speed control wire 74 is wound around the auxiliary winding 73 twice, so that the speed control number is three.
  • the number of terminal pins provided in the insulator 6 corresponding to one divided core 51 is two as described above, the number of speed adjustments is limited to three. Further, as the thickness of the insulator 6 becomes thinner and the motor becomes smaller, the number of terminal pins provided in the insulator 6 corresponding to one divided core 51 is expected to decrease to at least one. That is, when one terminal pin is used for one divided core 51, the speed adjustment is also reduced.
  • at least one of the start end or the end end of the speed control wire 74 is an auxiliary core 53a (core A) at which the auxiliary winding 73 starts to be wound, and an auxiliary core 53a (core A).
  • the winding 73 is entwined with the auxiliary core 53d (core B) at which the winding 73 finishes winding and the terminal pin 8 provided on the insulator 6 corresponding to the auxiliary core 53b (core C) different from the two cores.
  • the speed control wire 74 (74c) that has already been wound twice is already entwined in the order of the auxiliary core 53d, the auxiliary core 53c, the auxiliary core 53b, and the auxiliary core 53a from the entwined terminal pin 8f. It is wound and drawn in the same direction as the auxiliary winding 73 that is wound.
  • both of the terminal pins 8 provided on the insulator 6 corresponding to the auxiliary core 53a wound at the end cannot be used because the windings 7 are already entwined. Therefore, after winding the speed control wire 74 around the auxiliary core 53a, it is wound around the auxiliary core 53 again, wound around the opposite circumference or one round, and entwined with the terminal pin 8d.
  • the limit of the conventional speed adjustment can be increased. Further, even if only one terminal pin 8 is provided for one divided core 51 due to the miniaturization of the motor, it is possible to realize speed adjustment of the number of cores ⁇ 2-2.
  • the inner wall may be thinned.
  • the winding amount can be increased in the inner peripheral direction in the same way that the winding amount can be increased in the outer peripheral direction, so that a large torque can be generated.
  • the terminal pin 8 will be provided on the outer wall. Then, it is necessary to secure a legal insulation distance between the housing 3a and the terminal pin 8, but since the arc length can be made longer than that of the inner wall 62, many terminal pins 8 can be provided. Therefore, there is an effect that the number of speed adjustments can be increased as compared with the case where the terminal pin 8 is provided on the inner wall 62.
  • the AC motor according to the present invention can maintain the speed adjustment number even if the number of terminal pins provided in the insulator corresponding to the 1-split core is reduced due to the thinning of the insulator and the miniaturization of the motor.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

La présente invention concerne un moteur à courant alternatif qui comprend : des noyaux principaux et des noyaux auxiliaires en forme d'anneau qui sont reliés en alternance dans la direction circonférentielle ; un enroulement principal et un enroulement auxiliaire qui s'étendent de manière annulaire vers leurs noyaux respectifs ; et un fil de réglage de vitesse enroulé en chevauchement autour de l'enroulement principal ou de l'enroulement auxiliaire qui s'étend de manière annulaire à partir d'un noyau prédéterminé A jusqu'à un noyau B. Une extrémité de départ et/ou une extrémité de terminaison du fil de réglage de vitesse est reliée à une broche de borne disposée sur un isolant correspondant à un noyau C qui est différent dudit noyau A et dudit noyau B
PCT/JP2021/006039 2020-03-12 2021-02-18 Moteur à courant alternatif WO2021182052A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202180018968.5A CN115210996A (zh) 2020-03-12 2021-02-18 交流电动机
JP2022505876A JP7198988B2 (ja) 2020-03-12 2021-02-18 交流モータ

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020-043508 2020-03-12
JP2020043508 2020-03-12

Publications (1)

Publication Number Publication Date
WO2021182052A1 true WO2021182052A1 (fr) 2021-09-16

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Application Number Title Priority Date Filing Date
PCT/JP2021/006039 WO2021182052A1 (fr) 2020-03-12 2021-02-18 Moteur à courant alternatif

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JP (1) JP7198988B2 (fr)
CN (1) CN115210996A (fr)
WO (1) WO2021182052A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003088031A (ja) * 2001-09-13 2003-03-20 Matsushita Seiko Co Ltd コンデンサ電動機の固定子
JP2012235572A (ja) * 2011-04-28 2012-11-29 Panasonic Corp コンデンサ電動機

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003088031A (ja) * 2001-09-13 2003-03-20 Matsushita Seiko Co Ltd コンデンサ電動機の固定子
JP2012235572A (ja) * 2011-04-28 2012-11-29 Panasonic Corp コンデンサ電動機

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JP7198988B2 (ja) 2023-01-05
JPWO2021182052A1 (fr) 2021-09-16
CN115210996A (zh) 2022-10-18

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