WO2011042975A1 - ファンモーター及びこれを備えた空気調和機 - Google Patents
ファンモーター及びこれを備えた空気調和機 Download PDFInfo
- Publication number
- WO2011042975A1 WO2011042975A1 PCT/JP2009/067564 JP2009067564W WO2011042975A1 WO 2011042975 A1 WO2011042975 A1 WO 2011042975A1 JP 2009067564 W JP2009067564 W JP 2009067564W WO 2011042975 A1 WO2011042975 A1 WO 2011042975A1
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- WIPO (PCT)
- Prior art keywords
- fan motor
- stator
- teeth
- housing
- stators
- Prior art date
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Classifications
-
- 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
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
- H02K1/148—Sectional cores
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
- F04D25/066—Linear Motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
- F04D29/326—Rotors specially for elastic fluids for axial flow pumps for axial flow fans comprising a rotating shroud
-
- 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
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
- H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
Definitions
- the present invention relates to a fan motor and an air conditioner equipped with the fan motor.
- a propeller fan for the fan unit in order to make the indoor unit thinner and smaller.
- a propeller fan is provided with a boss portion having a rotation center and a blade portion having blades formed from the boss portion to the outer peripheral side.
- wing part is provided in the boss
- a magnet is annularly attached to the outer peripheral portion of the fan, and the outer surface of the magnet is sequentially arranged in the circumferential direction as N pole, S pole, N pole,.
- a fan motor has been proposed, in which a plurality of fixed coils are arranged on the outside and an annular yoke is provided outside the coils.
- Such a fan motor can make the boss portion smaller than that provided with a motor in the boss portion, so that the ventilation path can be enlarged and the blade can be made to the vicinity of the rotation axis. For this reason, the freedom degree of design of a fan motor improves.
- a fan motor can increase the rotor radius, a large torque can be obtained and an improvement in efficiency can be expected.
- JP 61-52181 (first page, FIG. 1)
- the present invention has been made to solve the above-described problems, and includes a fan motor capable of improving the degree of design freedom while suppressing an increase in size of the fan motor itself, and the same.
- the purpose is to obtain an air conditioner.
- a fan motor includes a blade portion, a rotor provided on the outer peripheral portion of the blade portion, a motor disposed on the outer peripheral side of the rotor, and a stator provided with teeth on the inner peripheral surface, and the stator and rotor. And a housing arranged to cover the outer peripheral side of the housing, the housing is polygonal, the stator is arranged at at least one corner of the housing, and part or all of the stator is an end portion Is provided with auxiliary teeth.
- the stator is arranged at the corner of the polygonal housing. For this reason, the magnitude
- stator exists only in a part on the outer peripheral side of the rotor. For this reason, there is a concern about the occurrence of cogging due to the end of the stator. Therefore, in the present invention, auxiliary teeth are provided at some or all ends of the stator. For this reason, the cogging resulting from the edge part of a stator can be reduced.
- 1 is an external perspective view showing a fan motor according to Embodiment 1 of the present invention.
- 1 is an assembled perspective view of a fan motor according to Embodiment 1 of the present invention. It is a front view which shows the stator which concerns on Embodiment 1 of this invention. It is a characteristic view which shows the auxiliary teeth width dependence of cogging in the fan motor which concerns on Embodiment 1 of this invention. It is a front view which shows the fan motor which concerns on Embodiment 2 of this invention. It is a front view which shows the fan motor which concerns on Embodiment 3 of this invention. It is a front view which shows the stator which concerns on Embodiment 3 of this invention.
- FIG. 1 is an external perspective view showing a fan motor according to Embodiment 1 of the present invention.
- FIG. 2 is an assembled perspective view of the fan motor.
- FIG. 3 is a front view showing a stator of the fan motor.
- the fan motor 100 has an axial fan structure, and includes a motor 40 including a blade portion 20, a rotor 10, and a stator 30, a housing 50, and the like.
- the housing 50 has a substantially rectangular frame shape, and the blade portion 20 is provided inside.
- the blade portion 20 includes a boss portion 22 and a plurality of blades 21.
- the boss portion 22 is a rotation center of the blade portion 20, and the blade 21 is formed on the outer peripheral portion thereof.
- a substantially annular ring 23 is formed on the outer periphery of the blade 21.
- the blade portion 20 (the blade 21, the boss portion 22, and the ring 23) is integrally formed of, for example, a resin material.
- a rotating shaft and a bearing (not shown) into which the rotating shaft is inserted are arranged inside the boss portion 22. The outer peripheral portion of the bearing is held by a housing 50, for example.
- wing part 20 should just be a material which can ensure the rigidity which does not deform
- the material forming the blade portion 20 may be a metal material or the like.
- the rotor 10 is provided on the outer peripheral surface of the ring 23 of the blade portion 20.
- the rotor 10 includes a magnet 11 and a rotor core 12.
- the rotor core 12 has a substantially annular shape and is provided on the outer peripheral surface of the ring 23.
- the magnet 11 has a substantially annular shape, and is provided on the outer peripheral surface of the rotor core 12.
- the magnet 11 is a rubber magnet having a thickness of 1.5 mm and a residual magnetic flux density of 0.245 T, for example.
- the magnet 11 has a flat plate shape, and the orientation of the magnet 11 is normal parallel magnetization, and 32 poles are magnetized.
- the magnet 11 is wound around and adhered to the outer peripheral surface of the rotor core 12.
- the axial width of the magnet 11 (the width in the rotational axis direction of the blade portion 20) is, for example, 10 mm, and is matched with the axial width of the stator 30.
- the magnet 11 may be a rare earth sintered magnet, a plastic magnet, a ferrite magnet, or the like.
- the method of fixing the magnet 11 to the rotor core 12 is not limited to the method of the first embodiment.
- the magnet 11 may be formed in a substantially annular shape, and the rotor core 12 may be fitted on the inner peripheral surface of the magnet 11.
- the magnet 11 may be divided into a plurality of segments, and these segments may be attached to the outer peripheral surface of the rotor core 12.
- the circumferential width of each segment may be made smaller than the pole pitch, and a space may be provided between the segments.
- the blade portion 20 when used at a high speed, it may be fixed from the outside of the magnet 11 with a nonmagnetic material such as glass epoxy (glass fiber + epoxy resin). Further, for example, the axial width of the magnet 11 may be made larger than the axial width of the stator 30 to cause overhang. Thereby, the magnetic flux leakage from the axial direction edge part of the stator 30 can be suppressed.
- a nonmagnetic material such as glass epoxy (glass fiber + epoxy resin).
- the axial width of the magnet 11 may be made larger than the axial width of the stator 30 to cause overhang. Thereby, the magnetic flux leakage from the axial direction edge part of the stator 30 can be suppressed.
- the rotor core 12 is obtained by laminating and bonding electromagnetic steel sheets and processing them into a ring shape.
- a thick iron core and other magnetic materials can be adopted in addition to the electromagnetic steel sheet.
- the orientation of the magnet 11 is the Hullback orientation
- the magnetic path does not come to the inner side (blade part 20 side), so the rotor core 12 does not have to be provided.
- the rotor core 12 is a magnetic body, it is generally heavy. For this reason, weight reduction of the fan motor 100 can be achieved by not providing the rotor core 12.
- the rotor 10 may be deformed due to insufficient rigidity of the rotor 10 to generate noise. In such a case, the rotor core 12 may be provided.
- the stator 30 includes a substantially L-shaped stator core 31.
- the angle formed by both outer peripheral surfaces of the stator core 31 is substantially the same angle (approximately 90 °) as the corner of the housing 50 to which the stator 30 is attached.
- Teeth 32 is provided on the inner peripheral surface of the stator core 31 (the surface facing the blade portion 20). Since motor 40 of the first embodiment is a three-phase motor, three teeth 32 (U-phase teeth 32a, V-phase teeth 32b, and W-phase teeth 32c) are provided on the inner peripheral surface of stator core 31. .
- a coil (not shown) is wound around the U-phase teeth 32a, the V-phase teeth 32b, and the W-phase teeth 32c.
- stator 30 is formed by laminating electromagnetic steel sheets into the shape shown in FIG. 3 by wire cutting or the like.
- the stator 30 may be formed of a thick iron core or other magnetic material.
- stators 30 are provided at two opposite corners of the housing 50. That is, the housing 50 is provided so as to cover the outer peripheral side of the motor 40 (the rotor 10 and the stator 30).
- the stator 30 is attached to the corners of the housing 50, both outer peripheral surfaces of the stator core 31 are brought into contact with (in contact with) the corners of the housing 50 (more specifically, both side surfaces adjacent to the corners). Further, the back surface of the stator core 31 is brought into contact with (in contact with) the step portion 51 of the housing 50. Thereby, the stator 30 is positioned at the corner of the housing 50. In this state, screws or the like (not shown) are inserted from the fixing holes 34 to fix the stator 30 to the corners of the housing 50.
- stator 30 is not limited to the position shown in the first embodiment.
- the stator 30 may be provided at one corner of the housing 50.
- the stator 30 may be provided at three corners of the housing 50.
- the stator 30 may be provided at all corners (four locations) of the housing 50.
- the stator 30 is provided at the opposite corners of the housing 50 in order to balance the magnetic attractive force generated between the rotor 10 and the stator 30.
- the fan motor 100 configured as described above, since the stator 30 is disposed at the corner of the housing 50, each side of the housing 50 can be brought close to the vicinity of the outer periphery of the rotor 10. Therefore, the fan motor 100 can be produced in the same size as a conventional fan in which a motor is arranged in the boss portion. Further, since the motor 40 (the rotor 10 and the stator 30) is provided on the outer peripheral side of the blade portion 20, a large ventilation path can be secured and the degree of freedom in designing the fan motor 100 can be improved.
- the stator 30 exists only in a part on the outer peripheral side of the rotor 10. For this reason, when the blade
- FIG. The cogging due to the end portion is generated by an attractive force generated between the teeth 32 (U-phase teeth 32 a and W-phase teeth 32 c) provided on the end portion side of the stator 30 and the magnet 11 of the rotor 10. Then, the cogging (torque pulsation) caused by the end of the stator 30 is twice the number of magnetic poles of the magnet 11 when the rotor 10 makes one rotation (2f component in terms of electrical angle).
- the distance between the auxiliary teeth 33 is (2m ⁇ 1) ⁇ / 2 (where m is a positive integer and ⁇ is the pole pitch of the magnetic poles of the magnet 11).
- m is a positive integer
- ⁇ is the pole pitch of the magnetic poles of the magnet 11.
- the distance between the auxiliary teeth 33 suitable for suppressing cogging caused by the end of the stator 30 varies depending on the configuration of the motor 40. Therefore, in order to cancel the n times component of cogging caused by the end portion of the stator 30, the distance between the auxiliary teeth 33 may be (nm-1) ⁇ / 2 instead of the above formula. However, it is difficult to cancel all the components of cogging caused by the end of the stator 30 at the same time.
- FIG. 4 is a characteristic diagram showing the auxiliary teeth width dependence of cogging in the fan motor according to Embodiment 1 of the present invention. As shown in FIG. 5, when the tip width of the auxiliary teeth 33 (the width from the tip of one auxiliary tooth 33 to the tip of the other auxiliary tooth 33) is 15 ° in electrical angle, cogging is minimized. .
- the width between the auxiliary teeth 33 provided at both ends of the stator 30 is set to 15 ° in electrical angle.
- the slot opening width L1 between the auxiliary teeth 33 and the teeth 32 is set to be the same as the slot opening width L2 between the teeth 32 (FIG. 3).
- positioned is not fan-shaped (substantially circular arc shape) in the inner peripheral side shape. For this reason, when the stator 30 is arranged at the corner of the housing 50, magnetic imbalance occurs.
- the U-phase teeth 32a, the V-phase teeth 32b, and the W-phase teeth 32c are arranged side by side in the circumferential direction (rotation direction of the rotor 10) as in the first embodiment, Since the teeth 32 are adjacent to each other between the phase and the W phase, the magnetic resistance of the magnetic circuit is small.
- the U-phase and the W-phase the distance between the teeth 32 is long, so the magnetic resistance of the magnetic circuit increases.
- the U-phase teeth 32a and the W-phase teeth 32c may have higher magnetic resistance than the V-phase teeth 32b. Therefore, there is a difference between the interlinkage magnetic flux of the U-phase teeth 32a and the W-phase teeth 32c and the interlinkage magnetic flux of the V-phase teeth 32b.
- the auxiliary teeth 33 are provided adjacent to the U-phase teeth 32a and the W-phase teeth 32c. For this reason, in addition to the magnetic circuit passing through the teeth 32 of each phase, a magnetic circuit via the auxiliary teeth 33 is newly added. Therefore, the interlinkage magnetic flux of the U-phase teeth 32a and the W-phase teeth 32c increases, and the difference from the interlinkage magnetic flux of the V-phase teeth 32b can be reduced.
- the coils wound around each of the U-phase teeth 32a, the V-phase teeth 32b, and the W-phase teeth 32c are connected to the drive circuit by Y connection (not shown).
- the in-phase coils of different stators 30 are connected in series. And it is driven by two-phase energization sensorless drive.
- the coil connection method and the energization method are not limited to this.
- the coils wound around each of the U-phase teeth 32a, the V-phase teeth 32b, and the W-phase teeth 32c may be connected to the drive circuit by ⁇ connection.
- the energization of the coil may be a sine wave (sine wave drive).
- a rotational position sensor that detects the position of the rotor 10 may be installed.
- the fan motor 100 since the stator 30 is disposed at the corner of the housing 50, each side of the housing 50 can be brought close to the vicinity of the outer peripheral portion of the rotor 10. Therefore, the fan motor 100 can be produced in the same size as a conventional fan in which a motor is arranged in the boss portion. Further, since the motor 40 (the rotor 10 and the stator 30) is provided on the outer peripheral side of the blade portion 20, a large ventilation path can be secured and the degree of freedom in designing the fan motor 100 can be improved. Further, since the auxiliary teeth 33 are provided at both ends of the stator 30, cogging caused by the ends of the stator 30 can be reduced. Therefore, noise when the fan motor 100 is driven can be reduced.
- stator 30 is arranged at a plurality of corners of the housing 50 (two corners in the first embodiment), the motor is compared with the case where the stator 30 is provided only at one location of the housing 50. A torque of 40 can be increased.
- stator 30 is provided at the opposite corners of the housing 50, the magnetic attractive force generated between the rotor 10 and the stator 30 can be balanced. For this reason, it can suppress vibrating when the blade
- stator 30 is disposed so as to be in contact with the two side surfaces adjacent to the corner portion of the housing 50, the positional accuracy of the stator 30 with respect to the rotor 10 is improved.
- the slot opening width L1 between the auxiliary teeth 33 and the teeth 32 is set to be the same as the slot opening width L2 between the teeth 32. For this reason, the cogging caused by the slot opening width between the auxiliary teeth 33 and the teeth 32 is the same as the cogging caused by the slot opening width between the teeth 32. Therefore, it becomes easy to take measures against cogging caused by the opening width between the teeth.
- the motor 40 is a three-phase motor, a highly efficient fan motor 100 can be obtained as compared with a fan motor using a single-phase motor.
- the stator 30 is provided with one U-phase tooth 32a, one V-phase tooth 32b, and one W-phase tooth 32c, but a plurality of U-phase teeth 32a, V-phase teeth 32b, and W-phase teeth 32c are provided. You may provide in the stator 30.
- the slot combination of the motor 40 may be 2: 3, 4: 3, 8: 9, or the like.
- Embodiment 2 the arrangement position of the stator 30 and the formation position of the auxiliary teeth 33 may be as follows.
- items not particularly described are the same as those in the first embodiment.
- FIG. 5 is a front view showing a fan motor according to Embodiment 2 of the present invention.
- the fan motor 101 according to the second embodiment is provided with stators (one stator 30 and three stators 30a) at all corners (four locations) of the housing 50.
- stators one stator 30 and three stators 30a
- the other three stators 30a are not provided with auxiliary teeth.
- the fan motor 101 configured as described above has twice as many (four) stators (one stator 30, three stators) as the fan motor 100 according to the first embodiment in which the two stators 30 are provided. A stator 30a) is provided. For this reason, the torque generation location is twice that of the fan motor 100 according to the first embodiment. That is, when the same current flows through the coil, the torque generated in fan motor 101 according to the second embodiment is double the torque generated in fan motor 100 according to the first embodiment. Therefore, the fan motor 101 according to the second embodiment can be made thinner and smaller than the fan motor 100 according to the first embodiment.
- the fan motor 101 according to the second embodiment has the rotor core 12 and the stator (The laminated thickness of the electromagnetic steel plates of the stator 30 and the stator 30) is set to 1 ⁇ 2 of the laminated thickness of the electromagnetic steel plates of the rotor core 12 of the fan motor and the stator (the stator 30 and the stator 30) according to the first embodiment. Can do.
- Embodiment 3 FIG. Further, the arrangement position of the stator 30 and the formation position of the auxiliary teeth 33 may be set as follows, for example. In Embodiment 3, items that are not particularly described are the same as those in Embodiment 1 or Embodiment 2.
- FIG. 6 is a front view showing a fan motor according to Embodiment 3 of the present invention.
- FIG. 7 is a front view showing the stator.
- auxiliary teeth 33 are provided only at one end of the stator 30b.
- Other configurations are the same as those of the fan motor 100 according to the first embodiment.
- one stator 30b (the upper right stator 30b in FIG. 6) is provided with auxiliary teeth 33 so as to be adjacent to the W-phase teeth 32c.
- the other stator 30b (lower left stator 30b in FIG. 6) is provided with auxiliary teeth 33 so as to be adjacent to the U-phase teeth 32a. .
- stators 30b have the same shape as shown in FIG. That is, the upper right stator 30b in FIG. 6 is provided at the corner of the housing 50 so that the surface of FIG. Further, the lower left stator 30b in FIG. 6 is provided at the corner of the housing 50 so that the front surface in FIG. Thereby, the stator 30b of the same shape can be used.
- auxiliary teeth 33 are provided only at one end of the stator 30b, a space is generated at the other end. For this reason, for example, as shown in FIG. 8, in order to use this space, the root interval of the teeth 32 may be widened in the space direction. Thereby, the range which can wind a coil can be increased. Since the coil cross-sectional area increases, the coil resistance can be reduced and the copper loss can be reduced.
- Embodiment 4 By making the shape of the housing as follows, the fan motor can be further downsized.
- items that are not particularly described are the same as those in the first to third embodiments.
- FIG. 9 is a front view showing a fan motor according to Embodiment 4 of the present invention.
- the corner portion of the housing 50a where the stator 30b is not provided is deleted.
- the shape of the housing 50a is substantially hexagonal.
- Other configurations are the same as those of the fan motor 102 according to the third embodiment.
- the fan motor 103 since the corner portion of the housing 50a where the stator 30b is not provided is deleted, the fan motor can be further downsized.
- Embodiment 5 FIG. Further, the shape of the housing may be as follows. In the fifth embodiment, items that are not particularly described are the same as those in the first to fourth embodiments.
- FIG. 10 is a front view showing a fan motor according to Embodiment 5 of the present invention.
- the fan motor 104 according to the fifth embodiment is a substantially triangular housing 50b.
- the stator 30c is provided in all the corner
- the stator 30c is provided with auxiliary teeth 33 at both ends thereof. Further, in the stator 30c, an angle formed by both outer peripheral surfaces of the stator core 31 is substantially the same angle (approximately 60 °) as a corner portion of the housing 50b.
- the present invention can be implemented even when the shape of the housing is triangular due to the arrangement space of the fan motor.
- the stator 30c is provided at all corners of the housing 50b. However, the stator 30c may be provided at some corners of the housing 50b. In the fifth embodiment, in order to balance the magnetic attractive force generated between the rotor 10 and the stator 30c, the stator 30c is provided at all corners of the housing 50b. Further, the auxiliary teeth 33 need not be provided in all the stators 30c, and may be provided in some of the stators 30c. The auxiliary teeth 33 may be provided one by one on different stators 30c.
- Embodiment 6 FIG. Further, the shape of the housing may be as follows. In the sixth embodiment, items that are not particularly described are the same as those in the first to fifth embodiments.
- FIG. 11 is a front view showing a fan motor according to Embodiment 6 of the present invention.
- the fan motor 104 according to the sixth embodiment is a substantially hexagonal housing 50c, for example.
- the stator 30d is provided in all the corners of the housing 50c, for example.
- the stator 30d is provided with auxiliary teeth 33 at both ends thereof.
- an angle formed by both outer peripheral surfaces of the stator core 31 is substantially the same angle (approximately 120 °) as a corner portion of the housing 50c.
- the present invention can be implemented as long as it is a fan motor having a polygonal housing.
- the housing may be octagonal.
- the stator (stator 30 to stator 30d) is provided so as to balance the magnetic attractive force generated between the rotor and the stator.
- the magnetic force generated between the rotor and the stator is provided.
- a stator may be provided at a position where the balance of the suction force is lost.
- a stator may be provided at a corner portion at an asymmetric position (corner portion at a position not facing). If there is room in the arrangement space of the stator 30, a plurality of U-phase teeth 32a, V-phase teeth 32b, and W-phase teeth 32c may be provided on the stator.
- Embodiment 7 FIG. In the seventh embodiment, an example in which the fan motor shown in the first to sixth embodiments is used in an air conditioner will be described.
- FIG. 12 is a longitudinal sectional view showing an example of an air conditioner according to Embodiment 7 of the present invention.
- FIG. 12 shows an example in which the fan motor 100 according to Embodiment 1 is used for an indoor unit 200 of an air conditioner.
- FIG. 12 shows the left side of the figure as the front side of the indoor unit 200. Based on FIG. 12, the structure of the indoor unit 200 will be described.
- the fan motors shown in the second to sixth embodiments may be used as the fan motor of the indoor unit 200.
- the indoor unit 200 supplies conditioned air to an air-conditioning target area such as a room by using a refrigeration cycle that circulates refrigerant.
- This indoor unit 200 mainly includes a casing 110 in which an inlet 111 for sucking indoor air into the interior and an outlet 115 for supplying conditioned air to an air-conditioning target area are formed, and the interior of the casing 110
- the fan motor 100 that sucks room air from the suction port 111 and blows air-conditioned air from the air outlet 115, and the air path from the suction port 111 to the fan motor 100, and exchanges heat between the refrigerant and the room air.
- a heat exchanger 114 that produces conditioned air.
- the suction port 111 is formed in the upper part of the housing 110.
- the air outlet 115 is formed in the lower part of the housing 110 (more specifically, the lower side of the front surface of the housing 110).
- the fan motor 100 is disposed on the downstream side of the suction port 111 and on the upstream side of the heat exchanger 114. Further, for example, three fan motors 100 are arranged in the direction perpendicular to the paper surface. Note that the number of fan motors 100 installed is merely an example. What is necessary is just to change suitably the installation number of the fan motor 100 according to the air volume etc. which are requested
- the heat exchanger 114 is disposed on the leeward side of the fan motor 100.
- the heat exchanger 114 includes a front side heat exchanger 114 a disposed on the front side of the housing 110 and a back side heat exchanger 114 b disposed on the back side of the housing 110.
- a fin tube heat exchanger or the like may be used.
- the suction port 111 is provided with a grill 112 and a filter 113.
- the blower outlet 115 is provided with a mechanism for controlling the blowing direction of the airflow, such as a vane (not shown).
- room air flows into the indoor unit 200 from the suction port 111 formed in the upper part of the housing 110 by the fan motor 100. At this time, dust contained in the air is removed by the filter 113.
- this indoor air passes through the heat exchanger 114, it is heated or cooled by the refrigerant flowing in the heat exchanger 114 to become conditioned air.
- the conditioned air is blown out of the indoor unit 200 from the air outlet 115 formed in the lower part of the housing 110, that is, to the air-conditioning target area.
- the fan motor 100 shown in the first embodiment is used.
- the fan motor 100 can be made thinner than a conventional propeller fan, and the area of the blade 21 can be increased.
- the indoor unit 200 according to Embodiment 7 can be made thinner and smaller than the conventional indoor unit. Further, when the indoor unit 200 according to Embodiment 7 is manufactured in the same size as the conventional indoor unit, an indoor unit having a larger air volume than the conventional indoor unit can be obtained.
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Iron Core Of Rotating Electric Machines (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
図1は、本発明の実施の形態1に係るファンモーターを示す外観斜視図である。図2は、このファンモーターの組立斜視図である。また、図3は、このファンモーターのステーターを示す正面図である。
羽根部20は、ボス部22及び複数の羽根21を備えている。ボス部22は、羽根部20の回転中心となるものであり、その外周部には、羽根21が形成されている。また、羽根21の外周部には、略円環状のリング23が形成されている。羽根部20(羽根21、ボス部22及びリング23)は、例えば樹脂材料で一体成形される。また、ボス部22の内側には回転シャフト及びこの回転シャフトが挿入されたベアリング(図示せず)が配置されている。このベアリングの外周部は例えばハウジング50に保持されている。
なお、羽根部20を形成する材料は、樹脂材料に限らず、磁気吸引力(ローター10とステーター30との間の磁気吸引力)や空気抵抗等により変形しない剛性を確保できる材料であればよい。例えば、羽根部20を形成する材料は、金属材料等であってもよい。
ステーター30がハウジング50の角部に固定された状態においては、U相ティース32a、V相ティース32b、W相ティース32c及び補助ティース33の先端部と、ローター10の磁石11の外周面と、の間に一定のギャップが形成されている。
本実施の形態1では、ローター10とステーター30との間に発生する磁気吸引力をバランスさせるため、ハウジング50の対向する角部にステーター30を設けている。ハウジング50の対向する角部にステーター30を設けることにより、羽根部20が回転した際に振動することを抑制することができ、羽根部20が回転した際に発生する騒音を抑制することができる。
図4は、本発明の実施の形態1に係るファンモーターにおける、コギングの補助ティース幅依存性を示す特性図である。図5に示すように、補助ティース33先端幅(一方の補助ティース33の先端部から他方の補助ティース33の先端部までの幅)が電気角で15°のとき、コギングが最小となっている。したがって、本実施の形態1では、ステーター30の両端部に設けられた補助ティース33間の幅を、電気角で15°とした。なお、補助ティース33とティース32との間のスロット開口幅L1は、ティース32間のスロット開口幅L2と同じに設定している(図3)。
例えば、本実施の形態1のようにU相ティース32a、V相ティース32b及びW相ティース32cは、周方向(ローター10の回転方向)に並設されている場合、U相-V相間及びV相-W相間は、各ティース32が隣同士となるため、磁気回路の磁気抵抗は小さい。一方、U相-W相間では、ティース32の間隔が遠くなるため、磁気回路の磁気抵抗が大きくなる。このため、U相ティース32a及びW相ティース32cは、V相ティース32bに比べて、磁気抵抗が高くなる場合がある。したがって、U相ティース32a及びW相ティース32cの鎖交磁束とV相ティース32bの鎖交磁束には、差が生じてしまう。
また、本実施の形態1ではモーター40(ローター10及びステーター30)のスロットコンビネーションを示さなかったが、モーター40のスロットコンビネーションは特に限定されるものではない。例えばモーター40のスロットコンビネーションを、2:3、4:3、8:9等とすればよい。
ステーター30の配置位置や補助ティース33の形成位置を、例えば以下のようにしてもよい。なお、本実施の形態2において、特に記述しない項目については実施の形態1と同様とする。
本実施の形態2に係るファンモーター101は、ハウジング50の全ての角部(4箇所)にステーター(1つのステーター30、3つのステーター30a)が設けられている。また、ステーターのうち、1つのステーター30はその両端部に補助ティース33が設けられており、その他3つのステーター30aは補助ティースが設けられていない。これらの点が、本実施の形態2に係るファンモーター101と実施の形態2に係るファンモーター100との差異点である。その他の構成は、同様である。
つまり、ファンモーター101は、ステーター30の両端部に設けられた補助ティースにより、ステーター30及びステーター30aの端部に起因するコギングを相殺して低減している。
また、ステーター30の配置位置や補助ティース33の形成位置を、例えば以下のようにしてもよい。なお、本実施の形態3において、特に記述しない項目については実施の形態1又は実施の形態2と同様とする。
本実施の形態3に係るファンモーター102は、ステーター30bの一方の端部のみに補助ティース33が設けられている。その他の構成は、実施の形態1に係るファンモーター100と同様になっている。
これにより、同一形状のステーター30bを用いることができる。
本実施の形態3に係るファンモーター102においては、異なるステーター30bの同相コイルが直列に接続されている。これにより、U相ティース32a及びW相ティース32cの双方において鎖交磁束を増加させることができる。
ハウジングの形状を以下のようにすることで、ファンモーターをより小型化することができる。なお、本実施の形態4において、特に記述しない項目については実施の形態1~実施の形態3と同様とする。
本実施の形態4に係るファンモーター103は、ハウジング50aにおけるステーター30bが設けられていない角部を削除している。これにより、ハウジング50aの形状は、略六角形となっている。その他の構成は、実施の形態3に係るファンモーター102と同様である。
また、ハウジングの形状を以下のようにしてもよい。なお、本実施の形態5において、特に記述しない項目については実施の形態1~実施の形態4と同様とする。
本実施の形態5に係るファンモーター104は、略三角形状のハウジング50bとなっている。また、ハウジング50bの例えば全ての角部に、ステーター30cが設けられている。このステーター30cは、その両端部に補助ティース33が設けられている。また、ステーター30cは、ステーターコア31の両外周面のなす角度がハウジング50bの角部と略同一角度(略60°)となっている。
また、補助ティース33は全てのステーター30cに設けられている必要はなく、一部のステーター30cに設けられていてもよい。異なるステーター30cに、1つずつ補助ティース33を設けてもよい。
また、ハウジングの形状を以下のようにしてもよい。なお、本実施の形態6において、特に記述しない項目については実施の形態1~実施の形態5と同様とする。
本実施の形態6に係るファンモーター104は、例えば略六角形状のハウジング50cとなっている。また、ハウジング50cの例えば全ての角部に、ステーター30dが設けられている。このステーター30dは、その両端部に補助ティース33が設けられている。また、ステーター30dは、ステーターコア31の両外周面のなす角度がハウジング50cの角部と略同一角度(略120°)となっている。
また、実施の形態1~本実施の形態6では、ローター-ステーター間に発生する磁気吸引力をバランスさせるようにステーター(ステーター30~ステーター30d)を設けたが、ローター-ステーター間に発生する磁気吸引力のバランスが崩れる位置にステーターを設けてもよい。例えば、偶数角となる多角形状のハウジングにおいて、非対称位置の角部(対向しない位置の角部)にステーターを設けてもよい。
ステーター30の配置スペースに余裕があれば、U相ティース32a、V相ティース32b及びW相ティース32cのそれぞれを複数本ずつステーターに設けてもよい。
本実施の形態7では、実施の形態1~実施の形態6に示したファンモーターを空気調和機に用いた例について説明する。
なお、室内機200のファンモーターとして、実施の形態2~実施の形態6に示したファンモーターを用いてももちろんよい。
まず、室内空気は、ファンモーター100によって筐体110の上部に形成されている吸込口111から室内機200内に流れ込む。このとき、フィルター113によって空気に含まれている塵埃が除去される。この室内空気は、熱交換器114を通過する際、熱交換器114内を流れる冷媒によって加熱又は冷却されて空調空気となる。そして、空調空気は、筐体110の下部に形成されている吹出口115から室内機200の外部、つまり空調対象域に吹き出されるようになっている。
Claims (11)
- 羽根部と、
該羽根部の外周部に設けられたローター、及び該ローターの外周側にギャップを介して配置され、内周面にティースが設けられたステーターを有するモーターと、
前記ステーター及び前記ローターの外周側を覆うように配置されたハウジングと、
を備えたファンモーターにおいて、
前記ハウジングは多角形状であり、
前記ステーターは、前記ハウジングの少なくとも1つの角部に配置され、
前記ステーターの一部又は全部は、端部に補助ティースが設けられていることを特徴とするファンモーター。 - 前記ステーターは、前記ハウジングの少なくとも2つの角部に設けられていることを特徴とする請求項1に記載のファンモーター。
- 端部に前記補助ティースが設けられた前記ステーターのうちの少なくとも2つは、一方の端部に補助ティースが設けられたものであることを特徴とする請求項2に記載のファンモーター。
- 端部に前記補助ティースが設けられた前記ステーターのうちの少なくとも1つは、両方の端部に補助ティースが設けられたものであることを特徴とする請求項1に記載のファンモーター。
- 前記ステーターを少なくとも2つ備え、
これらステーターのうちの少なくとも2つは、対向する角部に設けられていることを特徴とする請求項1に記載のファンモーター。 - 一方の端部に補助ティースが設けられた少なくとも2つの前記ステーターは同形状であり、
これらステーターの一部は、
表裏反対に、前記ハウジングの角部に設けられることを特徴とする請求項3に記載のファンモーター。 - 前記ステーターは、
前記ハウジングの角部に隣接する2つの側面部と接して固定されていることを特徴とする請求項1に記載のファンモーター。 - 前記補助ティースが設けられた前記ステーターは、複数の前記ティースを備え、
前記補助ティースと当該補助ティースと隣り合う前記ティースとの間のスロット開口幅は、
複数の前記ティースの間のスロット開口幅と同じであることを特徴とする請求項1に記載のファンモーター。 - 前記モーターは3相モーターであることを特徴とする請求項1に記載のファンモーター。
- 前記モーターは三相モーターであり、
各相のコイルが巻き付けられた複数の前記ティースを有する前記ステーターを複数備え、
異なる前記ステーターに設けられた同相のコイルは、直列接続されていることを特徴とする請求項1に記載のファンモーター。 - 室内空気を内部に吸い込むための吸込口及び空調空気を空調対象域に供給するための吹出口が形成された筐体と、
前記筐体内に収納された請求項1~請求項10のいずれか一項に記載のファンモーターと、
前記吸込口から前記ファンモーターまでの風路に配設され、前記室内空気を熱交換して前記空調空気とする熱交換器と
を備えたことを特徴とする空気調和機。
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