WO2023112829A1 - 単相回転電機およびそれを適用した掃除機、電動航空機、および電気機械 - Google Patents

単相回転電機およびそれを適用した掃除機、電動航空機、および電気機械 Download PDF

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Publication number
WO2023112829A1
WO2023112829A1 PCT/JP2022/045308 JP2022045308W WO2023112829A1 WO 2023112829 A1 WO2023112829 A1 WO 2023112829A1 JP 2022045308 W JP2022045308 W JP 2022045308W WO 2023112829 A1 WO2023112829 A1 WO 2023112829A1
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Prior art keywords
stator
electric machine
phase
stator core
poles
Prior art date
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Ceased
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PCT/JP2022/045308
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English (en)
French (fr)
Japanese (ja)
Inventor
裕治 榎本
大祐 佐藤
博久 佐野
泰弘 丸川
京平 相牟田
守 木村
正宏 増澤
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Proterial Ltd
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Proterial Ltd
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Priority to JP2023567748A priority Critical patent/JPWO2023112829A1/ja
Publication of WO2023112829A1 publication Critical patent/WO2023112829A1/ja
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/02—Details of the magnetic circuit characterised by the magnetic material
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • 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
    • H02K3/24—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
    • H02K41/02—Linear motors; Sectional motors

Definitions

  • the present invention relates to a single-phase rotating electrical machine driven by single-phase alternating current, and particularly to the structure of a stator core and stator coils.
  • Motor output is the product of rotation speed and torque, and torque increases in proportion to current.
  • An equivalent output can be obtained with a small current by reducing the current, that is, reducing the torque, and increasing the number of revolutions instead.
  • a rotating electrical machine for driving an automobile is being developed in the direction of reducing the size and weight of the motor by increasing the rotation speed and increasing the speed reduction ratio of the gear. That is, in moving bodies such as automobiles, since the weight of the drive system itself such as a motor also contributes to fuel efficiency, there is a demand for a smaller size and lighter weight.
  • small and lightweight motors for drones and aircraft are also required.
  • it is used in such a way as to increase the amount of work done by the propeller.
  • motors are becoming smaller and lighter due to higher speeds.
  • stick-type and cordless vacuum cleaners are becoming more popular for household use, and stick-types need to be heavy enough for users to handle, and batteries and electric blowers must be light as well. be.
  • cordless vacuum cleaners also need to be equipped with an additional battery, and a drive system that is lighter than the electric blowers used in conventional vacuum cleaners is required. For this reason, there is an increasing need to increase the speed and size of motors, and vacuum cleaner manufacturers use motors that rotate more than about 100,000 revolutions per minute.
  • Patent Documents 1 and 2 as prior art documents in this technical field.
  • a gap is provided on the outer peripheral side of the stator core to allow air to flow between the stator holding case and the stator core, thereby dissipating heat due to iron loss generated in the core.
  • by using a Y-shaped split core in which the stator is divided for each pole winding to the teeth is facilitated and winding with a high space factor can be achieved.
  • the copper loss can be reduced, so that heat generation of the motor can be suppressed and a high-speed motor can be configured.
  • Patent Document 2 shows a single-phase motor applied to a vacuum cleaner.
  • Patent Document 2 discloses a single-phase motor having 8 magnet poles and 8 stator pole teeth, and has a structure in which a large ventilation path is provided between the stator poles by concentrating the windings of the stator. .
  • the blower motor with a high output density that secures the output by the number of revolutions has a structure in which the cooling performance is obtained by flowing the air in the axial direction of the motor.
  • single-phase motors have a structure in which the windings are wound around the teeth of the stator, and the windings are arranged in winding spaces called slots. For this reason, even if it is attempted to cool by passing air in the axial direction, there is a problem that the cross-sectional area of the ventilation passage is small and the cooling performance cannot be improved.
  • a ventilation passage is provided outside the core. Therefore, the structure is such that the heat dissipation performance cannot be improved.
  • Patent Document 2 has a structure in which a large ventilation flow path is provided in the cross section that constitutes the motor, so that the intake air can flow smoothly.
  • the coil portion is also exposed to the ventilation path, the cooling effect is enhanced.
  • the conductors other than the conductors in the portion surrounded by the stator core are the portions called coil ends that connect the essential conductor portions, resulting in a structure that causes an increase in resistance. there is Therefore, there is a problem that heat generation itself increases due to the generation of Joule loss in proportion to the resistance value of the conductor coil.
  • the surface of the coil is not exposed to the main ventilation path, there is a problem that heat dissipation from the surface of the coil is lowered.
  • the present invention is a single-phase rotating electric machine driven by a single-phase alternating current, which has a stator core, rotor magnets, and stator coils mounted in slots of the stator core.
  • the ratio of the number of magnet poles of the rotor magnet to the number of stator poles of the stator core is 3:2.
  • FIG. 2 is a cross-sectional view of the single-phase rotating electrical machine in Embodiment 1 as seen from the axial direction;
  • FIG. 2 is a perspective view showing the shape of the stator core and the arrangement structure of coils of the single-phase rotating electrical machine in Example 1.
  • FIG. It is a cross-sectional structural diagram of a general three-phase permanent magnet synchronous motor.
  • 1 is a cross-sectional view of a typical single-phase synchronous motor;
  • FIG. 3 is a cross-sectional view showing the core shape and coil arrangement structure of the single-phase motor of Patent Document 1;
  • FIG. 3 is a cross-sectional view showing the core shape and coil arrangement structure of the single-phase motor of Patent Document 2; 2C is a cross-sectional view illustrating the detailed configuration of the single-phase motor of FIG. 2D;
  • FIG. 1 is a cross-sectional view of a single-phase rotating electric machine in Example 1.
  • FIG. 1 is a cross-sectional view of a 6-magnet pole type single-phase rotating electrical machine in Example 1.
  • FIG. FIG. 4B is a diagram illustrating a method of manufacturing the stator core of the single-phase rotating electrical machine of FIG. 4A; 4B is a diagram showing various structures of the stator core of the single-phase rotating electrical machine of FIG. 4A;
  • FIG. 4B is a diagram showing various structures of the stator core of the single-phase rotating electrical machine of FIG. 4A;
  • FIG. 4B is a diagram showing various structures of the stator core of the single-phase rotating electrical machine of FIG. 4A;
  • FIG. 1 is a cross-sectional view of a 12-pole type single-phase rotating electric machine in Example 1.
  • FIG. It is a figure explaining the manufacturing method of the stator core of the single-phase rotary electric machine of FIG. 5A.
  • 5B is a perspective view of the motor structure of the single-phase rotating electric machine of FIG. 5A;
  • FIG. 1 is a perspective view of a housing of a 6-magnet pole type single-phase rotating electric machine in Embodiment 1.
  • FIG. 1 is a perspective view of a stator core of a 6-magnet pole type single-phase rotating electric machine in Embodiment 1.
  • FIG. 1 is a perspective view of a stator coil of a 6-magnet pole type single-phase rotating electrical machine in Example 1.
  • FIG. 1 is a perspective view showing a state in which a stator core of a six-magnet pole type single-phase rotating electrical machine in Example 1 is incorporated in a housing.
  • FIG. 4 is a diagram for explaining the assembly of the stator coil of the six-magnet pole type single-phase rotating electric machine in the first embodiment; 1 is a diagram showing the appearance of a single-phase rotating electric machine in Example 1.
  • FIG. 1 is a diagram showing an assembly structure of a single-phase rotating electrical machine in Example 1.
  • FIG. 10 is a cross-sectional view of an outer rotor type single-phase electric rotating machine according to a second embodiment;
  • FIG. 10 is a cross-sectional view of a linear motor type electric machine in Example 2;
  • FIG. 11 is a perspective view showing an example in which the single-phase rotating electrical machine in Example 3 is applied to a cleaner;
  • FIG. 11 is a perspective view showing an example in which the single-phase rotating electrical machine in Example 3 is applied to a drone;
  • FIG. 1A is a cross-sectional view of a single-phase rotating electric machine driven by single-phase alternating current in this embodiment, viewed from the direction of the rotating shaft (hereinafter simply referred to as the axial direction).
  • FIG. 1B is a perspective view in which the housing 2 in FIG. 1A is hidden.
  • FIG. 1A the positional relationship between the housing 2, the stator core 1, the stator coils 3 and the rotor magnets 4 is shown.
  • the housing 2 of this embodiment is made of aluminum, has an inner peripheral curved surface that contacts the outer peripheral side of the stator core 1, and is shaped so that the outer peripheral side of the stator core 1 can be in close contact.
  • the stator core 1 is held in the direction of the central portion of the rotating shaft of the housing 2 .
  • the number of magnet poles of the rotor magnet is 6 and the number of stator poles is 4 (the ratio of the number of magnet poles of the rotor magnet and the number of stator poles of the stator iron core is 3:2).
  • the rotor magnet 4 is attached to the shaft 5 and rotates as a rotor with the shaft 5 as the rotation axis.
  • the rotor magnet 4 has six poles, and the N poles and S poles are alternately arranged at uniform angles in the circumferential direction.
  • Various orientations such as radial orientation, polar anisotropic orientation, and parallel magnetization for each pole can be configured for the orientation of the magnets.
  • the stator poles of the stator iron core 1 are arranged for two poles of the magnet poles of the rotor magnet 4, forming an inner rotor type positional relationship in which the rotor is inside.
  • the magnet poles in the 12 o'clock and 6 o'clock directions shown in FIG. 1A are configured without the opposing stator core 1 .
  • the stator core 1 has a substantially horseshoe shape.
  • a conductor is arranged in a slot surrounded by this stator core 1, and the conductor is connected to a conductor arranged inside another stator core 1 at a conductor portion constituting a transition to form one fixed conductor. It is set as the structure which forms the child coil 3. As shown in FIG. That is, the stator coils 3 are mounted in the slots of the stator core 1, but in the example of FIG. It is configured to be connected to the arranged conductor.
  • FIG. 1B is a perspective view of the single-phase rotating electric machine in this embodiment, which makes it easy to understand the positional relationship between the transitions of the stator coils 3 and the stator core 1 .
  • the stator coil 3 is composed of an essential conductor portion 3a that is surrounded by the stator core 1 and is essential for forming a magnetic flux, and a conductor portion that forms a transition called coil end 3b that connects the essential conductor portions 3a.
  • the stator core 1 is constructed by stacking thin plate stamped products in the axial direction. It is configured to be electrically insulated in the direction.
  • a large gap is formed in the region of the stator that constitutes the single-phase rotating electric machine. That is, since the stator core 1 does not exist in the 12:00 and 6:00 direction portions in FIG. 1A, the ventilation passages 15 are formed through the axial direction. Since the coil ends 3b, which are connecting portions of the stator coils 3, are exposed in the ventilation passages 15, the stator coils 3 are easily cooled by the air passing through the coil ends 3b. That is, since an air flow path (ventilation path 15) having a structure in which air flows is provided in the space provided for one pole of the magnet pole, the conductor is exposed and cooled in the air flow path. Become.
  • in-slot ventilation passage 16 which is a space in which neither coils nor cores are arranged, and this portion also serves as a large ventilation passage extending in the axial direction.
  • This also has a structure in which heat is easily taken away by air passing through the side surface of the stator coil 3 and the inner peripheral surface of the stator core 1, so that the structure improves the heat dissipation performance.
  • Figures 2A to 2D show the cross-sectional structure of a general motor, and explain the difference from the structure of the single-phase rotating electric machine in this embodiment shown in Figures 1A and 1B.
  • FIG. 2A shows the cross-sectional structure of a general three-phase permanent magnet synchronous motor. It has a structure with 8 magnet poles and 12 stator poles. Since the stator is a three-phase motor, the number of poles is a multiple of three. In addition, the number of magnet poles is a multiple of 2 since the magnet has one pair of N and S poles.
  • the basic form of a concentrated winding permanent magnet synchronous motor is to have three stator poles for two magnet poles. Concentrated winding is a structure in which windings are wound around the teeth of the stator, and the wires wound around the teeth are arranged in the slots of the stator core as shown in FIG. 2A. Looking at FIG. 2A, it can be expected that it would be rather difficult for the wind to pass through the stator.
  • FIG. 2B shows a cross-sectional view of a general single-phase synchronous motor. Since this is a single phase, the number of stator poles need not be a multiple of three. Here, the case of 8 magnet poles and 8 stator poles is illustrated. As in FIG. 2A, this is also a concentrated winding, so it can be understood that it is difficult for the coil conductors wound around the teeth to be arranged in the slots and take a large air flow path in the stator cross section. .
  • FIG. 2C shows a structure in which the split core shown in Patent Document 1 is provided with an air flow path on the outer peripheral side of the stator core.
  • the magnet poles are four poles and the stator poles are four poles.
  • the core of the stator is divided for each magnetic pole, it has a structure in which the coil can be easily wound around the teeth. For this reason, the structure is such that a gap is provided in the slot by tightly winding the coil around the tooth with a high space factor.
  • a passage through which air flows is also provided outside the iron core.
  • the outer flow path is narrow and the ventilation loss increases.
  • FIG. 2D shows a single-phase motor structure with 8 magnet poles and 8 stator poles of Patent Document 2.
  • the iron core and the coil are configured in the same region as above, it can be seen that fairly large air flow paths are configured at four locations in the circumferential direction.
  • the stator coils By arranging the stator coils for every two stator poles, the arrangement is made at four locations in the circumferential direction, and a large space is secured at the remaining four locations.
  • the air flow path is large, it is thought that the cooling performance of the parts in contact with the flow path can be improved.
  • FIG. 3A is a cross-sectional view illustrating the detailed configuration of the single-phase motor of FIG. 2D.
  • FIG. 3A shows a single-phase motor with 8 magnet poles and 8 stator poles, in which the stator poles and the magnet poles face each other.
  • the flow of magnetic flux coming out of the N pole of the rotor magnet 4 and entering the S pole is illustrated by dotted lines. It can be seen from FIG. 3A that the magnetic flux flows counterclockwise in all four stator cores 1 .
  • the essential conductor portion 3a arranged inside the stator core 1 is subject to a current flowing upward in the plane of the drawing. Recognize. Also, it can be seen that the current flows in the opposite direction at the coil end 3b arranged on the outer peripheral side of the motor. In this motor structure, the coil ends 3b arranged on the outer periphery are originally electrically unnecessary, but they are arranged unavoidably in order to pass the necessary current to the conductors inside the stator core.
  • Coil conductors other than essential conductor portions arranged inside the stator core only increase copper loss, causing an increase in the amount of heat generated.
  • FIG. 3B shows a cross-sectional view of the single-phase rotating electric machine in this embodiment.
  • the number of magnet poles is 6 and the number of stator poles is 4 (the ratio of the number of magnet poles of the rotor magnet to the number of stator poles of the stator iron core is 3:2).
  • the substantially horseshoe-shaped stator core 1 faces two poles of the rotor magnet 4, and has a structure in which one pole is skipped and another two poles of the stator core 1 are arranged. That is, the two stator poles of the stator core 1 are arranged in an angle range facing the two magnetic poles of the rotor magnet 4, and one magnetic pole has a facing portion of the stator pole.
  • the dashed lines indicate the flow of magnetic flux coming out of the N pole of the magnet and returning to the S pole.
  • the path out of the N and back to the S pole is counterclockwise.
  • the flow of magnetic flux in the iron core on the left side is the flow of magnetic flux that exits from the N pole and returns to the S pole through the stator core, which has high magnetic permeability, as before, the flow of magnetic flux is is clockwise.
  • the current commensurate with this flux flow is shown oriented on the essential conductor portion 3a of the stator coil.
  • the stator coil can be configured by connecting the respective conductors. That is, the stator coil 3 is formed by connecting the right and left essential conductor portions 3a with the coil ends 3b. As a result, useless coil end portions can be greatly reduced.
  • the number of magnet poles is 6, which is 3/4 of the number in the case of FIG. 3A. Therefore, compared to the structure in FIG. can do.
  • the air flow path in the axial direction can be made large, so the cooling capacity is also high.
  • FIGS. 4A to 4E show specific configuration examples of the stator core of FIG. 3B described above in this embodiment.
  • the drawing assumes an iron core with an outer diameter of about ⁇ 30 mm, which is applied to a vacuum cleaner motor.
  • FIG. 4A shows a cross-sectional view of a single-phase rotating electrical machine in this embodiment having rotor magnets 4 with six magnet poles and an outer diameter of ⁇ 10 mm.
  • the substantially horseshoe-shaped stator core 1 has a magnetic path width of 2.8 mm and an average magnetic path length of about 30 mm.
  • the inner circumferential length of the substantially horseshoe-shaped stator core 1 is 24.3 mm, and the outer circumferential length is 37.3 mm.
  • FIG. 4C When this is composed of an iron-based amorphous metal foil strip, as shown in FIG. It can be formed by folding a stack of sheets into a substantially horseshoe shape.
  • the shape formed by bending has a structure as shown in FIG. 4C, which can be configured with an amorphous metal foil strip.
  • FIG. 4D a method in which the amorphous metal foil strip is wound around a take-up piece or the like, impregnated with resin and hardened, and then cut to form the tip portion of the teeth. is also conceivable. So far, we have shown examples of stator core configurations using iron-based amorphous metal foil strips. You can also Furthermore, as a general method, it is also possible to create by laminating thin plates, as is done with electromagnetic steel sheets, as shown in FIG. 4E.
  • FIG. 5A to 5C show the case where the number of magnet poles of the single-phase rotating electric machine in this embodiment is 12 and the number of stator poles is 8 (the number of magnet poles of the rotor magnet and the number of stator poles of the stator iron core).
  • a specific configuration example of a stator core with a ratio of 3:2) is shown.
  • a cross-sectional structure is shown in FIG. 5A.
  • FIG. 5A the configuration in which the two poles of the substantially horseshoe-shaped stator core 1 are opposed to the two magnet poles is the same as in FIG. 4A.
  • stator poles are a set for three magnet poles. Also, since the stator has a structure in which the essential conductor portions 3a of the stator coils arranged inside the stator core 1 are respectively connected by the coil ends 3b, two stator cores form a set. The number of stator coils 3 is a multiple of two.
  • Fig. 5B shows an example in which an iron core is configured with an amorphous metal foil band, similar to the previous 6-pole machine.
  • the thickness of one amorphous metal foil strip is 25 ⁇ m, and the number of sheets is about 50 when the magnetic path width of FIG. 5A is 1.4 mm, considering that the space factor is 90%.
  • FIG. 5C shows a perspective view of the motor structure when the number of magnet poles is 12.
  • the same components as those in FIGS. 1A and 1B are denoted by the same reference numerals, and descriptions thereof are omitted.
  • Reference numeral 6 denotes a bearing that supports the shaft 5 rotatably.
  • the greater the number of poles the shorter the coil transition distance, so the coil end portion can be shortened and the copper loss can be reduced.
  • iron loss increases, so it is necessary to select the number of poles according to the operating point such as rotation speed and torque.
  • FIG. 6 is a perspective view of the assembly structure of the single-phase rotating electric machine shown in FIG. 5C.
  • the stator core 1 is held by the stator core holding member 7 for holding the stator core, and the stator coil 3 preformed by winding is inserted through the slot opening for assembly.
  • the stator core holding member 7 is arranged inside the housing 2, the stator core 1 may be held directly inside the housing 2 without the stator core holding member 7, as shown in FIG. 1A.
  • the rotor can be manufactured by attaching the rotor magnet 4 to the shaft 5 or by adhering a ring-shaped magnet.
  • a balance ring is installed at both ends of the magnet and the balance is corrected by grinding the part, and a strength member such as carbon fiber is installed on the surface of the magnet to prevent scattering when it is damaged.
  • a strength member such as carbon fiber is installed on the surface of the magnet to prevent scattering when it is damaged.
  • FIGS. 7A to 7E show the detailed structure and assembly structure of each part of the 6-pole magnet pole model shown in FIGS. 1A and 1B.
  • FIG. 7A shows the structure of the housing 2 made of aluminum. As shown in FIG. 1A, the inner peripheral surface of the housing 2 has a curved surface that matches the outer peripheral surface of the stator core, and has a stepped structure for positioning the stator core in the axial direction. I understand. 7B shows the shape of the stator core 1. FIG. In FIG. 7B, it has a laminated structure of thin plates. 7C shows the stator coils 3. FIG. FIG. 7D shows a state in which the stator core 1 is assembled in the housing 2. FIG. As shown in FIG.
  • FIG. 7D a substantially horseshoe-shaped stator core 1 formed by stacking thin plates is inserted into a housing 2 and assembled.
  • FIG. 7E is a diagram illustrating assembly of the stator coil 3.
  • the width of the stator coil 3 smaller than the dimension of the slot opening of the stator core 1, the tightly wound stator coil can be used as a part instead of winding the molded stator coil around the stator core. can be assembled as
  • FIG. 8A shows the appearance of the single-phase rotating electric machine in this embodiment.
  • FIG. 8B shows the assembly structure of the single-phase rotating electric machine in the embodiment.
  • end brackets 8 for holding bearings 6 (bearings) that allow the shaft 5 to rotate are provided on the output shaft side and the counter-output shaft side. (air flow path) is provided. Thereby, it is configured such that the air flows through the inside of the single-phase rotating electric machine.
  • the area where the stator poles are not opposed is 1/3 of the circumference of the motor. It becomes a structure that exists in the region of For this reason, the area becomes a ventilation path (air flow path), and the cooling performance can be significantly improved.
  • the structure is such that a part of the coil end is exposed to the ventilation path (air flow path), it is possible to directly cool the heat of the coil end, which is a heating element.
  • the heat generated from the stator core part is in contact with a housing material with good thermal conductivity such as aluminum, which improves heat dissipation, and the housing itself faces the ventilation path (air flow path).
  • the stator coil can employ a molded coil that is wound in alignment, the coil can be made compact with a high space factor.
  • the coil which has been prepared in advance in a predetermined shape, can be assembled after the stator core is assembled in the housing, the productivity is improved as compared with a general rotary electric machine.
  • the shape of the stator core is a simple horseshoe shape, thin magnetic steel sheets, hard magnetic steel sheets containing 6.5% Si, iron-based amorphous metals, and iron-based nanocrystalline alloys ( In particular, it is also possible to use low-loss materials such as high-Bs nanocrystalline alloys.
  • the useless coil end portion can be greatly reduced, the resistance value of the stator coil can be lowered and the amount of heat generated can be reduced.
  • the single-phase rotating electric machine in this embodiment can have a smaller rotor diameter, so it is a motor suitable for higher speeds, and by increasing the speed, the mechanical output can be improved even with the same torque.
  • an inner rotor type single-phase rotating electric machine has been described, but in the present embodiment, the configuration of the single-phase rotating electric machine in the first embodiment is applied to an outer rotor type rotating electric machine or a linear motor type electric machine. An example will be described.
  • FIG. 9A is a cross-sectional view of an outer rotor type single-phase electric rotating machine in this embodiment.
  • FIG. 9A components having the same functions as those in FIGS. 1A and 1B are denoted by the same reference numerals, and description thereof will be omitted.
  • FIG. 9A shows the structure of the single-phase rotating electric machine in the first embodiment applied to an outer rotor type single-phase rotating electric machine. An example of eight stator poles is shown.
  • 9 is an outer rotor yoke. As shown in FIG. 9A, it can be seen that the ventilation passage 15 can be secured in the outer rotor type as well as in the inner rotor type.
  • FIG. 9B is a cross-sectional view when the configuration of the single-phase rotating electrical machine in Example 1 is applied to a linear motor type electrical machine.
  • components having the same functions as those in FIGS. 1A and 1B are denoted by the same reference numerals, and descriptions thereof are omitted.
  • 10 is a linear mover yoke and 11 is a mover magnet.
  • the above single-phase rotating electric machine is read as a linear motor type electric machine.
  • the ventilation path 15 can be secured in the same manner as in a single-phase rotating electric machine.
  • FIG. 10A is an example in which the single-phase rotating electric machine described in the above embodiment is applied to a vacuum cleaner. That is, the single-phase rotating electric machine described in the above embodiment can be used for the motor 100 of the electric blower portion of the stick-type cleaner 20.
  • FIG. 10A is an example in which the single-phase rotating electric machine described in the above embodiment is applied to a vacuum cleaner. That is, the single-phase rotating electric machine described in the above embodiment can be used for the motor 100 of the electric blower portion of the stick-type cleaner 20.
  • FIG. 10B is an example in which the single-phase rotating electric machine described in the above embodiment is applied to a propeller fan for an electric aircraft such as a drone. That is, the single-phase rotating electric machine described in the above embodiment can be used for the motor 100 that drives the propeller fan 31 of the drone 30.
  • the use of the single-phase rotating electric machine described in the above embodiment is suitable in that the motor can be cooled by air and that it must be made smaller by speeding up.
  • the present invention can reduce the power consumption of the single-phase rotating electric machine by providing a single-phase rotating electric machine having a structure capable of enhancing heat dissipation and reducing the amount of heat generated. Therefore, it is possible to reduce carbon emissions, prevent global warming, and contribute especially to item 7 energy for realizing SDGs (Sustainable Development Goals).
  • the present invention is not limited to the above-described examples, and includes various modifications.
  • the above-described embodiments have been described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the described configurations.
  • it is possible to replace part of the configuration of one embodiment with the configuration of another embodiment and it is also possible to add the configuration of another embodiment to the configuration of one embodiment.
  • stator core 1: stator core
  • 2: housing 3: stator coil
  • 4: rotor magnet 5: shaft
  • 6: bearing 7: stator core holding member
  • 9 outer rotor yoke
  • 10 linear mover yoke
  • 11: mover magnet 15: ventilation path
  • 16 ventilation path in slot
  • 31: propeller fan 100: motor

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  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
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  • Electromagnetism (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
PCT/JP2022/045308 2021-12-14 2022-12-08 単相回転電機およびそれを適用した掃除機、電動航空機、および電気機械 Ceased WO2023112829A1 (ja)

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JP2010183838A (ja) * 1998-11-06 2010-08-19 Metglas Inc 電動モータ用のバルクアモルファス金属磁気構成要素
JP2011015572A (ja) * 2009-07-03 2011-01-20 Mitsubishi Electric Corp 永久磁石埋め込み型回転子及び掃除機
JP2013135541A (ja) * 2011-12-27 2013-07-08 Hitachi Industrial Equipment Systems Co Ltd アキシャルギャップ回転電機
JP2014075942A (ja) * 2012-10-05 2014-04-24 Mitsubishi Electric Corp 同期電動機
JP2015130796A (ja) * 2015-03-02 2015-07-16 章 三好 回転電気機器
JP2016005377A (ja) * 2014-06-18 2016-01-12 日立アプライアンス株式会社 電動送風機およびそれを用いた電気掃除機
JP2016059276A (ja) * 2007-06-05 2016-04-21 レスメド・モーター・テクノロジーズ・インコーポレーテッド 軸受管を有するブロワ
JP2016149855A (ja) * 2015-02-12 2016-08-18 パナソニックＩｐマネジメント株式会社 回転電機およびそれを備えた電動送風機

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US20090134734A1 (en) * 2005-07-19 2009-05-28 Denso Corporation Ac motor and control unit thereof
JP2011160621A (ja) * 2010-02-03 2011-08-18 Hitachi Ltd 回転電機および回転電機用ステータの製造方法

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JPS4981806A (https=) * 1972-12-15 1974-08-07
JPS6274461U (https=) * 1985-10-30 1987-05-13
JP2000092755A (ja) * 1998-09-07 2000-03-31 Mitsubishi Electric Corp 回転電機またはリニアモータおよび回転電機の製造方法
JP2010183838A (ja) * 1998-11-06 2010-08-19 Metglas Inc 電動モータ用のバルクアモルファス金属磁気構成要素
JP2016059276A (ja) * 2007-06-05 2016-04-21 レスメド・モーター・テクノロジーズ・インコーポレーテッド 軸受管を有するブロワ
JP2011015572A (ja) * 2009-07-03 2011-01-20 Mitsubishi Electric Corp 永久磁石埋め込み型回転子及び掃除機
JP2013135541A (ja) * 2011-12-27 2013-07-08 Hitachi Industrial Equipment Systems Co Ltd アキシャルギャップ回転電機
JP2014075942A (ja) * 2012-10-05 2014-04-24 Mitsubishi Electric Corp 同期電動機
JP2016005377A (ja) * 2014-06-18 2016-01-12 日立アプライアンス株式会社 電動送風機およびそれを用いた電気掃除機
JP2016149855A (ja) * 2015-02-12 2016-08-18 パナソニックＩｐマネジメント株式会社 回転電機およびそれを備えた電動送風機
JP2015130796A (ja) * 2015-03-02 2015-07-16 章 三好 回転電気機器

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