WO2012046274A1

WO2012046274A1 - Fan motor and air conditioner provided with same

Info

Publication number: WO2012046274A1
Application number: PCT/JP2010/005987
Authority: WO
Inventors: 森　剛; 井上　正哉; 山田　彰二; 智哉福井; 健一迫田; 仁一鈴木
Original assignee: 三菱電機株式会社
Priority date: 2010-10-06
Filing date: 2010-10-06
Publication date: 2012-04-12
Also published as: CN103141011A; JP5484586B2; JPWO2012046274A1; CN103141011B

Abstract

A fan motor (100) is provided with a rotor (10) disposed on the periphery of a blade part (20), and a stator (30) positioned on the outer circumferential side of the rotor (10). The stator (30) is provided as one set of stators (30a to 30c). The stator 30a is provided with a first group of teeth in which U-phase tooth, a V-phase tooth, and a W-phase tooth are sequentially positioned; the stator 30b is provided with a second group of teeth in which a V-phase tooth, a W-phase tooth, and a U-phase tooth are sequentially positioned; and the stator 30c is provided with a third group of teeth in which a W-phase tooth, a U-phase tooth, and a V-phase tooth are sequentially positioned. The coil of each group of teeth is wound in the same direction. The stator 30a to stator 30c are positioned in such a manner that the teeth of the same phase in each group of teeth are in a position separated by an electrical angle of only an integral multiple of 360°, and the coils wound around the teeth of the same phase of the stators 30a to 30c are connected in a series.

Description

Fan motor and air conditioner equipped with the same

The present invention relates to a fan motor and an air conditioner equipped with the fan motor.

Conventional air conditioners have been proposed to use a propeller fan for the fan unit in order to make the indoor unit thinner and smaller. Such 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. And the motor which rotates a blade | wing part is provided in the boss | hub part. Therefore, the motor is mainly an outer rotor type, and a blade portion is provided on the rotor side (rotation side). For this reason, when a motor is enlarged, the magnitude | size of the blade | wing arrange | positioned on the outer side of a motor will be restrict | limited, and the ventilation path will be blocked. Therefore, there are problems such that a sufficient air volume cannot be obtained, the degree of freedom in design of the blade portion is small, and the fan efficiency is lowered. Further, if the size of the motor is reduced in order to secure the ventilation path, there is a problem that the efficiency of the motor itself is lowered.

In order to solve these problems, for example, “a radial sleeve bearing 21 a and a thrust rolling bearing 21 b are arranged on the stator substrate 20 in the vertical direction, and the bearing portion 21 is rotatably supported by the bearing portion 21. A rotating main portion having a blade portion 23 integral with the rotating shaft 22 and an annular magnet 24 having 16 poles of driving magnetic poles in the outer peripheral direction of the blade portion 23 are fixed. Are formed of a synthetic resin or the like, and are formed on the stator substrate 20 with three magnets facing the magnet 24 at a predetermined interval. An armature portion 27 including a laminated armature core 25 formed in an E shape from the teeth and an armature coil 26 wound around each tooth is intensively arranged. Fan motor has been proposed that (for example, see Patent Document 1). In such a fan motor, the boss portion can be made smaller than that provided with a motor in the boss portion. Therefore, the ventilation path can be increased, and the blade can be used near the rotating shaft. For this reason, the freedom degree of design of a fan motor improves. In addition, since such a fan motor can increase the rotor radius, a large torque can be obtained and an improvement in efficiency can be expected.

JP-A-8-298763 (paragraphs 0010 and 0012, FIG. 1)

However, although such a fan motor (see, for example, Patent Document 1) can reduce the boss portion, since the stator is arranged as a set of U phase, V phase, and W phase on a part of the outer periphery of the fan, both ends of the stator are arranged. There is a problem that the magnetic resistance of the phase arranged at the center is smaller than that of the phase arranged at the center (tooth), resulting in magnetic imbalance. In addition, such a fan motor (see, for example, Patent Document 1) causes an imbalance of electromagnetic excitation force between the stator and the rotor, which does not occur in a general motor configuration in which the stator is disposed around the entire periphery of the rotor. There was a problem. For this reason, such a fan motor (for example, refer patent document 1) had the problem that torque ripple, noise, vibration, etc. will increase, and the problem that the efficiency of a fan motor will fall.

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 eliminating the magnetic imbalance between the phases. The purpose is to obtain an air conditioner.

A fan motor according to the present invention has a three-phase structure including a blade portion, a rotor provided on the outer peripheral portion of the blade portion, and a stator that is disposed on the outer peripheral side of the rotor via a gap and that is provided with teeth on the inner peripheral surface. In a fan motor including a motor and a housing arranged to cover the outer peripheral sides of the stator and the rotor, the stator includes one or more sets of a first stator, a second stator, and a third stator, and the first stator is , Including at least one first tooth group in which a U-phase tooth, a V-phase tooth, and a W-phase tooth are arranged in order along the rotation direction of the rotor, and the second stator includes a V-phase along the rotation direction of the rotor At least one second tooth group in which teeth, W-phase teeth, and U-phase teeth are arranged in order, and the third stator has a W-phase tooth along the rotational direction of the rotor. U-phase teeth and V-phase teeth are those having at least one third tooth group are arranged in this order. In the first teeth group, the second teeth group, and the third teeth group, the winding direction of the coil wound around the teeth is the same direction, and the first stator, the second stator, and the third stator are the teeth group. The in-phase teeth of the first stator, the second stator, and the third stator are wound in series and are connected in series. is there.

A fan motor according to the present invention includes a blade portion, a rotor provided on the outer peripheral portion of the blade portion, and a stator that is disposed on the outer peripheral side of the rotor via a gap and that is provided with teeth on the inner peripheral surface. A fan motor comprising a three-phase motor having a housing and a housing arranged to cover the outer peripheral side of the stator and the rotor, wherein the stator comprises one or more sets of a first stator, a second stator, and a third stator, The 1 stator includes at least one first tooth group in which the U-phase teeth, the V-phase teeth, and the W-phase teeth are arranged in order along the rotation direction of the rotor, and the second stator extends along the rotation direction of the rotor. , V-phase teeth, W-phase teeth, and U-phase teeth are arranged in order, and the third stator has a W-phase along the rotation direction of the rotor. Isu, those U-phase teeth and V-phase teeth having at least one third tooth group are arranged in this order. The first teeth group, the second teeth group, and a part of the third teeth group, the winding direction of the coil wound around the teeth is the first direction, the first teeth group, The remaining part of the second tooth group and the third tooth group is in a second direction in which the winding direction of the coil is opposite to the first direction, and the first stator, the second stator, and the third stator are The teeth group in which the coil winding direction is the first direction is a position where the in-phase teeth are separated by an integral multiple of 360 ° in electrical angle, and the teeth group in which the coil winding direction is the second direction is With respect to the teeth group in which the winding direction is the first direction, the teeth having the same phase are arranged so that the electrical angles of the teeth are separated by 360 ° × N + 180 ° (N is an integer), and the first stator, the second stator, and the second stator 3 steps The coils wound around the in-phase teeth of the coil are connected in series so that the direction of current flow of the coil with the winding direction as the first direction is opposite to the direction of current flow of the coil with the winding direction as the second direction. It is connected.

In the present invention, the first stator, the second stator, and the third stator are arranged at predetermined positions, and coils wound around the in-phase teeth of each stator are connected in series. For this reason, each phase has the same number of coils wound around the teeth arranged at the end of the stator. In addition, in each phase, the number of coils wound around the coils of the teeth arranged other than the end of the stator is the same. And since these coils are connected in series in each phase, the interlinkage magnetic flux of each phase becomes the same, and it can be set as a magnetically balanced state.

It is an external appearance perspective view which shows the fan motor which concerns on Embodiment 1 of this invention. It is a front view which shows the stator of the fan motor which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows an example of the connection method of the in-phase teeth 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 another example of 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 fan motor which concerns on Embodiment 4 of this invention. It is a longitudinal cross-sectional view which shows an example of the air conditioner which concerns on Embodiment 5 of this invention.

Embodiment 1 FIG.
FIG. 1 is an external perspective view showing a fan motor according to Embodiment 1 of the present invention. FIG. 2 is a front view showing the stator of the fan motor. In addition, the broken line arrow shown in FIG. 1 has shown the rotation direction of the blade | wing part 20 (in other words, the rotor 10).
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.
In addition, the material which forms the blade | wing part 20 should just be a material which can ensure the rigidity which does not deform | transform by not only a resin material but magnetic attraction (magnetic attraction between the rotor 10 and the stator 30), air resistance, etc. . For example, 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. In addition, the magnet 11 may have a segment shape separated for each pole, or may have a substantially annular shape in which the poles are not magnetized.

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. In the first embodiment, 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.

Note that the magnet 11 may be a rare earth sintered magnet, a plastic magnet, a ferrite magnet, or the like. Further, the method of fixing the magnet 11 to the rotor core 12 is not limited to the method of the first embodiment. For example, the magnet 11 may be formed in a substantially annular shape, and the rotor core 12 may be fitted into the inner peripheral surface of the magnet 11. Further, for example, 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. When the magnet 11 is divided into a plurality of segments, the circumferential width of each segment may be made smaller than the pole pitch, and a space may be provided between the segments. Further, for example, when the blade 20 is used while being rotated 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). For example, the magnet 11 (which may include the rotor core 12) may be embedded using a resin material that forms the blade portion 20 without being limited to the segment shape (two-color molding or the like). 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 edge part of the axial direction side 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. As the material of the rotor core 12, a thick iron core and other magnetic materials can be employed in addition to the electromagnetic steel sheet. In addition, when 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. Since 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. In addition, when the rotor 10 is deformed due to insufficient rigidity of the rotor 10 and noise is generated, it is preferable to reinforce by providing the rotor core 12.

As shown in FIG. 1, the stator 30 according to the first embodiment includes three stators (a stator 30a, a stator 30b, and a stator 30c). Each of these stators has the same shape as shown in FIG. More specifically, each stator of 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 (for example, approximately 90 °) as the groove portion (inserted portion) 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 the motor 40 of the first embodiment is a three-phase motor, three teeth 32 (tooth 32a, tooth 32b, and tooth 32c) are provided on the inner peripheral surface of the stator core 31. A coil (not shown) is wound around the teeth 32a, teeth 32b, and teeth 32c.

Further, auxiliary teeth 33 are provided at both ends of the stator core 31 on the inner peripheral surface side. Thereby, when electricity is supplied to the teeth 32a and the teeth 32c, a magnetic circuit via the auxiliary teeth 33 is newly added. For this reason, in each of stator 30a, stator 30b, and stator 30c, the interlinkage magnetic flux of the phase of teeth 32a and teeth 32c can increase, and the difference with the interlinkage magnetic flux of the phase of teeth 32b can be decreased. Although the motor can be configured without the auxiliary teeth 33, the provision of the auxiliary teeth 33 can further suppress cogging and the like.

Each stator of the stator 30 is processed into a shape shown in FIG. 2 by wire cutting or the like by laminating electromagnetic steel sheets, like the rotor core 12. Each stator of the stator 30 may be formed of a thick powder iron core or other magnetic material.

Here, in the first embodiment, when each stator (stator 30a, stator 30b, stator 30c) of the stator 30 is attached to the housing, the teeth 32a, teeth 32b, and teeth 32c of each stator are rotated by the rotor 10. Along the direction, the teeth 32a, the teeth 32b, and the teeth 32c are arranged in this order. And the phase of the teeth 32a, the teeth 32b, and the teeth 32c provided in each stator is as follows.

In the stator 30a, coils are wound around the teeth so that the teeth 32a become U-phase teeth 32U, the teeth 32b become V-phase teeth 32V, and the teeth 32c become W-phase teeth 32W. Further, in the stator 30b, coils are wound around the teeth so that the teeth 32a become V-phase teeth 32V, the teeth 32b become W-phase teeth 32W, and the teeth 32c become U-phase teeth 32U. Further, in the stator 30c, coils are wound around the teeth 32 so that the teeth 32a become W-phase teeth 32W, the teeth 32b become U-phase teeth 32U, and the teeth 32c become V-phase teeth 32V.

That is, in the stator 30a, the U-phase teeth 32U and the W-phase teeth 32W are arranged on both sides of the V-phase teeth 32V. In stator 30b, V-phase teeth 32V and U-phase teeth 32U are arranged on both sides of W-phase teeth 32W. In the stator 30c, the W-phase teeth 32W and the V-phase teeth 32V are arranged on both sides of the U-phase teeth 32U.

The stator 30a corresponds to the first stator of the present invention, the stator 30b corresponds to the second stator of the present invention, and the stator 30c corresponds to the third stator of the present invention. Moreover, the teeth group of the stator 30a arrange | positioned in order of the U-phase teeth 32U, the V-phase teeth 32V, and the W-phase teeth 32W along the rotation direction of the rotor 10 is equivalent to the 1st teeth group in this invention. A group of teeth of the stator 30b arranged in the order of the V-phase teeth 32V, the W-phase teeth 32W, and the U-phase teeth 32U along the rotation direction of the rotor 10 corresponds to the second teeth group in the present invention. A group of teeth of the stator 30c arranged in the order of the W-phase teeth 32W, the U-phase teeth 32U, and the V-phase teeth 32V along the rotation direction of the rotor 10 corresponds to the third teeth group in the present invention.

In the first embodiment, in the first tooth group, the second tooth group, and the third tooth group, the winding direction of the coil wound around the tooth 32 is the same direction. Moreover, as shown in FIG. 3, for example, the coil wound around the in-phase teeth of the first teeth group, the second teeth group, and the third teeth group (that is, the in-phase teeth of the stator 30a, the stator 30b, and the stator 30c) They are connected in series with Y connection. The connection method of the coil wound around these in-phase teeth should just be connected in series, for example, (DELTA) connection may be sufficient. Note that “E” shown in FIG. 3 is, for example, a three-phase power source.

The stator 30a, the stator 30b and the stator 30c constituting the stator 30 are provided at three locations 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). When attaching each stator of the stator 30 to the housing 50, both outer peripheral surfaces of the stator core 31 are brought into contact with (in contact with) the inner peripheral surface of the groove portion of the housing 50. Further, the back surface of the stator core 31 is brought into contact (contacted) with a stepped portion (not shown) protruding from the inner peripheral surface of the groove portion of the housing 50. Accordingly, each stator of the stator 30 is positioned in the groove portion of the housing 50. In this state, a screw or the like (not shown) is inserted from the fixing hole 34 to fix each stator of the stator 30 to the groove portion of the housing 50.

In a state where each stator of the stator 30 is fixed to the groove portion of the housing 50, the gap between the tips of the teeth 32 a, the teeth 32 b, the teeth 32 c and the auxiliary teeth 33 in each stator and the outer peripheral surface of the magnet 11 of the rotor 10. A certain gap is formed.

Further, the stator 30a, the stator 30b, and the stator 30c constituting the stator 30 are provided at three locations of the housing 50 so that the respective phase teeth are in the following states.

That is, in a state where the q axis of the rotor 10 is in a rotational position that matches the center of the U-phase teeth 32U of the stator 30a, the stator 30b and the stator 30c also have the q-axis of the rotor 10 aligned with the center of the U-phase teeth 32U. It is like that. Similarly, in a state where the q-axis of the rotor 10 is in a rotational position that matches the center of the V-phase teeth 32V of the stator 30a, the stator 30b and the stator 30c also have the q-axis of the rotor 10 centered on the V-phase teeth 32V. It comes to fit. Similarly, in a state where the q axis of the rotor 10 is in a rotational position that matches the center of the W-phase teeth 32W of the stator 30a, the stator 30b and the stator 30c also have the q-axis of the rotor 10 the center of the W-phase teeth 32W. It comes to fit.
In other words, in the first embodiment, the in-phase teeth of the first tooth group, the second tooth group, and the third tooth group (that is, the in-phase teeth of the stator 30a, the stator 30b, and the stator 30c) are 360 ° in electrical angle. It is arranged at a position separated by an integer multiple of.

(Description of operation)
In the fan motor 100 configured as described above, the magnetic resistance (linkage magnetic flux) of each phase is as follows.

In the stator 30a, the teeth 32 are arranged in the order of the U-phase teeth 32U, the V-phase teeth 32V, and the W-phase teeth 32W along the rotation direction of the rotor 10. For this reason, since the teeth 32 are adjacent to each other between the U phase and the V phase and between the V phase and the W phase, the magnetic resistance of the magnetic circuit is small. On the other hand, between the U-phase and the W-phase, the distance between the teeth 32 is long, so the magnetic resistance of the magnetic circuit increases. For this reason, the U-phase teeth 32U and the W-phase teeth 32W have higher magnetic resistance than the V-phase teeth 32V. Therefore, there is a difference between the flux linkage between the U-phase teeth 32U and the W-phase teeth 32W and the flux linkage between the V-phase teeth 32V.

However, since the teeth 30 are arranged in the order of the V-phase teeth 32V, the W-phase teeth 32W, and the U-phase teeth 32U along the rotation direction of the rotor 10, the stator 30b has the V-phase teeth 32V and the U-phase teeth 32U. Is larger in magnetic resistance than the W-phase teeth 32W. Further, since the teeth 30 are arranged in the order of the W-phase teeth 32W, the U-phase teeth 32U, and the V-phase teeth 32V along the rotation direction of the rotor 10, the stator 30c has the W-phase teeth 32W and the V-phase teeth 32V. Is higher in magnetic resistance than the U-phase teeth 32U.

Therefore, the present embodiment in which coils wound around the in-phase teeth of the first tooth group, the second tooth group, and the third tooth group (that is, the in-phase teeth of the stator 30a, the stator 30b, and the stator 30c) are connected in series. In the fan motor 100 according to 1, the magnetic resistance of each phase can be made the same as a whole (that is, the interlinkage magnetic flux of each phase can be made the same as a whole).

As described above, in the fan motor 100 configured as in the first embodiment, since the magnetic resistance of each phase can be made the same as a whole, the magnetic imbalance between the phases can be eliminated. At this time, since a means for reducing the cross-sectional area of the teeth 32 is not used, a value corresponding to the original magnetic resistance can be secured.

In the first embodiment, in the first tooth group, the second tooth group, and the third tooth group, the winding directions of the coils wound around the teeth 32 are the same. Not only this but the winding direction of the coil of some teeth groups is good also as a reverse direction. For example, the coils of the first teeth group (that is, the stator 30a) are wound in the first direction, and the coils of the second teeth group (that is, the stator 30b) and the third teeth group (that is, the stator 30c) are opposite to the first direction. It is assumed that the wire is wound in the second direction. Thus, when the q axis of the rotor 10 is in a rotational position that matches the center of the U-phase teeth 32U of the stator 30b and the stator 30c, the center of the U-phase teeth of the stator 30a matches the −q axis of the rotor 10. In addition, the stator 30a can be arranged. That is, the stator (tooth group) in which the coil winding direction is the second direction is such that the in-phase teeth are 360 ° × N + 180 ° in electrical angle with respect to the stator (tooth group) in which the coil winding direction is the first direction. (N is an integer) It can arrange | position so that it may become a position away. Thus, by selecting the winding direction of the coil for each stator (that is, each tooth group), the degree of freedom of the arrangement position of the stator can be improved.

At this time, when the in-phase coil of the teeth group in which the coil winding direction is the first direction and the in-phase coil of the teeth group in which the coil winding direction is the second direction are connected in series, the direction of the current flowing in the in-phase coil of each tooth group is the same If it does, linkage flux as a whole phase will decrease. Therefore, when the in-phase coils of the teeth group in which the coil winding direction is the first direction and the in-phase coils of the teeth group in which the coil winding direction is the second direction are connected in series, the coil current flow direction is the first direction. The in-phase coils may be connected in series so that the direction of current flow in the coil with the winding direction as the second direction is opposite. By doing so, the interlinkage magnetic flux of the entire phase can be made into the number sum (that is, the interlinkage magnetic flux of the entire phase is set to the same phase coil under the condition that the coil winding direction of all teeth groups is only one direction. Can be the same as those obtained in series connection).

Further, although the slot combination of the motor 40 (the rotor 10 and the stator 30) is not shown in the first embodiment, the slot combination of the motor 40 is not particularly limited. For example, the slot combination of the motor 40 may be 2: 3, 4: 3, 8: 9, or the like. Further, as a driving method of the motor 40, a general motor driving method such as vector control or 120 ° energization can be applied. Further, the motor 40 can be driven by sensorless drive, but can also be driven with a sensor by arranging a position sensor such as a Hall IC if necessary.

Embodiment 2. FIG.
In the first embodiment, the fan motor is configured by using one set of the stator 30a, the stator 30b, and the stator 30c. However, the fan motor may be configured by using a plurality of sets of the stator 30a, the stator 30b, and the stator 30c. In the second embodiment, a fan motor 101 using two sets of the stator 30a, the stator 30b, and the stator 30c will be described. In the second embodiment, items not particularly described are the same as those in the first embodiment.

FIG. 4 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 includes two

stators

30a, 30b, and 30c. Further, the two stators 30 a are arranged so as to be symmetric with respect to the rotation axis of the blade portion 20. That is, the two stators 30a are arranged at opposing positions (positions where the positions of the stators 30 are rotated by a mechanical angle of 180 ° around the rotation axis of the blade portion 20). The stator 30b and the stator 30c are similarly arranged.

In the fan motor 101 configured as described above, since the magnetic attraction force (in other words, electromagnetic excitation force) generated between the rotor 10 and the stator 30 can be balanced, the torque ripple and blade portion of the motor 40 can be balanced. It is possible to suppress vibration when the 20 rotates, noise generated when the blade portion 20 rotates, and the like.

In the second embodiment, the winding direction of the coil of the same type of stator (for example, the stator 30a) is the same, but the winding direction of the coil may be changed as appropriate. This makes it easier to symmetrically arrange the same type of stator (for example, the stator 30a).

In the second embodiment, the fan motor 101 is configured using two sets of the stator 30a, the stator 30b, and the stator 30c. However, the fan motor may be configured using three or more sets of the stator 30a, the stator 30b, and the stator 30c. Of course. When a fan motor is configured using three or more sets of the

stators

30b and 30c, the same type of stators may be arranged in a regular polygon in addition to the same type of stators arranged symmetrically. For example, when a fan motor is configured using three or more sets of the stator 30b and the stator 30c, three of the same type of stators may be arranged in an equilateral triangle. Further, for example, when a fan motor is configured using five or more sets of the stator 30b and the stator 30c, five of the same type of stators may be arranged in a regular pentagon. Even if the same type of stators are arranged in a regular polygon, the magnetic attractive force generated between the rotor 10 and the stator 30 can be balanced.

Further, when the fan motor 101 is configured by using two sets of the stator 30b and the stator 30c as in the second embodiment, the fan motor 101 may be configured as shown in FIG.
FIG. 5 is a front view showing another example of a fan motor according to Embodiment 2 of the present invention.
In the fan motor 101 shown in FIG. 5, the shape of the housing 50 is a regular hexagon by arranging six stators close to a regular hexagon. By forming the housing 50 in a regular hexagon in this way, a hexagonal close-packed arrangement can be achieved when a plurality of fan motors 101 are arranged two-dimensionally. For this reason, the ratio of the fan area (wind path area) which occupies in the arrangement | positioning total space of a fan motor can be made high. Therefore, it is possible to improve the characteristics of the arranged fan motor 101 as a whole.

Embodiment 3 FIG.
When a plurality of fan motors are arranged, the housing may be formed in a rectangular shape in consideration of the installation space of the fan motor. In such a case, each stator (stator 30a, stator 30b, stator 30c) of the stator 30 may be arranged as follows, for example. In the third embodiment, a fan motor 102 using two sets of the stator 30b and the stator 30c will be described. In the third embodiment, items that are not particularly described are the same as those in the first or second embodiment.

FIG. 6 is a front view showing a fan motor according to Embodiment 3 of the present invention.
The fan motor 102 according to the third embodiment includes two stators 30a, two stators 30b, and two stators 30c, as in the second embodiment. Further, in the fan motor 102 according to the third embodiment, similar to the second embodiment, the same type of stators are symmetrically arranged. In the fan motor 102 according to the third embodiment, the housing 50 is formed in a rectangular shape.

Here, since the q axis of the rotor exists by the number of pole pairs, there are a plurality of positions where each stator of the stator 30 can be disposed (a position where the center of each stator, for example, the V-phase teeth 32V matches the q axis of the rotor). . Further, by reversing the coil winding direction of a part of the stator that constitutes the stator 30, this stator can be disposed at a position where the center of the V-phase teeth 32V is aligned with the −q axis of the rotor. The arrangement position of each stator is increased.

Therefore, in the third embodiment, each stator is arranged only on the short side of the housing 50. By arranging the stators of the stator 30 in this manner, the blade portion 20 (in other words, the rotor 10) having a size up to the limit of the distance between the long sides of the housing 50 can be used. In addition, although the stator 30a and the stator 30c are provided in the vicinity of the corners of the housing 50, in the third embodiment, the vicinity of these corners is also referred to as the short side.

Generally, when the shape of the housing 50 is rectangular and the aspect ratio is large, a large space on the outer side of the blade portion 20 can be secured on the short side (longitudinal direction of the housing 50). However, on the long side (the short side direction of the housing 50), the space outside the blade portion 20 is reduced. For this reason, if it is going to secure the arrangement space of a stator on the long side side of the housing 50 (short side direction of the housing 50), it will be necessary to make the diameter of the blade | wing part 20 (in other words, the rotor 10) small, and fans, such as an airflow, etc. The characteristics will deteriorate. However, the fan motor 102 according to the third embodiment can avoid such problems because each stator of the stator 30 is disposed only on the short side of the housing 50.

In the third embodiment, since the magnet 11 has 32 poles, there are 16 q-axis positions (32 positions including the -q axis). When the number of poles of the magnet 11 is increased, the q-axis position is also increased, and the interval in the rotation direction is also reduced. Therefore, the distance between the blade portion 20 (in other words, the rotor 10) and the long side of the housing 50 is further reduced. Is possible.

In the third embodiment, the fan motor 102 using two sets of the stator 30b and the stator 30c has been described. However, the number of these sets is arbitrary. By disposing each stator of the stator 30 only on the short side of the housing 50, the distance between the blade portion 20 (in other words, the rotor 10) and the long side of the housing 50 can be reduced, and fan characteristics such as airflow can be obtained. Can be prevented from decreasing.

Embodiment 4 FIG.
In Embodiments 1 to 3, one tooth group is arranged in one stator. Of course, the same type of teeth group may be disposed in one stator. In the third embodiment, items not particularly described are the same as those in the first to third embodiments.

FIG. 7 is a front view showing a fan motor according to Embodiment 4 of the present invention. In addition, the broken line arrow shown in FIG. 7 has shown the rotation direction of the blade | wing part 20 (in other words, the rotor 10).
The fan motor 103 according to the fourth embodiment includes a set of a stator 30d, a stator 30e, and a stator 30f as in the first embodiment. The arrangement positions of the stator 30d, the stator 30e, and the stator 30f are the same as the arrangement positions of the stator 30a, the stator 30b, and the stator 30c in the first embodiment.

However, in the fourth embodiment, each stator of the stator 30 is provided with a plurality of tooth groups (two in the fourth embodiment). More specifically, the stator 30d is provided with two first tooth groups. That is, the stator 30d has a U-phase tooth 32U, a V-phase tooth 32V, a W-phase tooth 32W, a U-phase tooth 32U, a V-phase tooth 32V and W along the rotation direction of the rotor 10 (clockwise in FIG. 7). A phase tooth 32W and six teeth 32 are provided. The stator 30e is provided with two second tooth groups. That is, the stator 30e extends along the rotation direction of the rotor 10 (in the clockwise direction in FIG. 7), V-phase teeth 32V, W-phase teeth 32W, U-phase teeth 32U, V-phase teeth 32V, W-phase teeth 32W and U Phase teeth 32U and six teeth 32 are provided. The stator 30f is provided with two third tooth groups. That is, the stator 30f is arranged in the direction of rotation of the rotor 10 (in the clockwise direction in FIG. 7), W-phase teeth 32W, U-phase teeth 32U, V-phase teeth 32V, W-phase teeth 32W, U-phase teeth 32U and V. Phase teeth 32V and six teeth 32 are provided.

Further, the teeth 32 provided on the stator 30d, the stator 30e, and the stator 30f are connected in series for each in-phase tooth as in the first embodiment.

Thus, by providing a plurality of the same type of teeth group in one stator, the magnetic imbalance between the phases can be further reduced as compared with the case where one tooth group is provided in one stator. Furthermore, as in the first embodiment, each tooth 32 is connected in series for each in-phase tooth, so that the magnetic imbalance between the phases can be further reduced.

Of course, the number of the same type of teeth group provided in one stator is not limited to two but may be three or more. However, if the number of teeth of the same type provided in one stator is increased too much, the structure becomes the same as that of a conventional fan motor in which the stator is disposed all around the rotor, and the housing 50 and the blade portion 20 ( In other words, the merit of effectively using the space by arranging the stator in the gap of the rotor 10) is lost.

Embodiment 5 FIG.
In the fifth embodiment, an example in which the fan motor shown in the first to fourth embodiments is used in an air conditioner will be described.

FIG. 8 is a longitudinal sectional view showing an example of an air conditioner according to Embodiment 5 of the present invention. FIG. 8 shows an example in which the fan motor 100 according to Embodiment 1 is used for an indoor unit 200 of an air conditioner. 8 shows the left side of the figure as the front side of the indoor unit 200. Based on FIG. 8, the configuration of the indoor unit 200 will be described.
As a matter of course, the fan motor shown in the second to fourth 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 indoor air from the suction port 111 and blows conditioned air from the blower outlet 115, and the air path from the suction port 111 to the fan motor 100, and exchanges heat between the refrigerant and the indoor air. And 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 orthogonal to the paper surface. 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 | required.

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. As this heat exchanger 114, for example, 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. Furthermore, the blower outlet 115 is provided with a mechanism for controlling the blowing direction of the airflow, such as a vane (not shown).

Here, the flow of air in the indoor unit 200 will be briefly described.
First, 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. When 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.

In the indoor unit 200 (air conditioner) configured in this manner, the fan motor 100 shown in the first embodiment is used. The fan motor 100 can be reduced in thickness as compared with a conventional fan motor in which a motor is connected to a boss of a blade portion and a conventional fan motor in which a stator is disposed in the entire outer peripheral portion of the blade portion, and the area of the blade 21 is increased. can do. For this reason, the indoor unit 200 according to Embodiment 5 can be made thinner and smaller than the conventional indoor unit. Further, when the indoor unit 200 according to the fifth embodiment 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.

In the indoor unit 200 (air conditioner) configured as described above, the fan motor 100 shown in the first embodiment is used. For this reason, compared with the indoor unit which mounts the conventional fan motor by which the stator was provided in a part of outer peripheral part of the blade | wing part, a noise, a vibration, etc. can be prevented.

In the fifth embodiment, the fan motor 100 is disposed on the leeward side of the heat exchanger 114, but the fan motor 100 may be disposed on the leeward side of the heat exchanger 114.

10 rotors, 11 magnets, 12 rotor cores, 20 blades, 21 blades, 22 bosses, 23 rings, 30 stators, 30a-30f stators, 31 stator cores, 32 teeth, 32a teeth, 32b teeth, 32c teeth, 32U U phase teeth , 32V V-phase teeth, 32W W-phase teeth, 33 auxiliary teeth, 34 fixing holes, 40 motor, 50 housing, 100-103 fan motor, 110 housing, 111 inlet, 112 grille, 113 filter, 114 heat exchanger , 114a front side heat exchanger, 114b back side heat exchanger, 115 outlet, 200 indoor unit (air conditioner).

Claims

The wings,
A rotor provided on the outer peripheral portion of the blade portion, and a three-phase motor having a stator disposed on the outer peripheral side of the rotor via a gap and provided with teeth on the inner peripheral surface;
A housing disposed so as to cover the outer peripheral side of the stator and the rotor;
In the fan motor with
The stator includes at least one set of a first stator, a second stator, and a third stator,
The first stator includes at least one first tooth group in which a U-phase tooth, a V-phase tooth, and a W-phase tooth are sequentially arranged along the rotation direction of the rotor,
The second stator includes at least one second tooth group in which a V-phase tooth, a W-phase tooth, and a U-phase tooth are sequentially arranged along the rotation direction of the rotor,
The third stator includes at least one third tooth group in which a W-phase tooth, a U-phase tooth, and a V-phase tooth are sequentially arranged along the rotation direction of the rotor,
In the first teeth group, the second teeth group, and the third teeth group, the winding direction of the coil wound around the teeth is the same direction,
The first stator, the second stator, and the third stator are arranged so that the in-phase teeth of the teeth group are separated by an integral multiple of 360 ° in electrical angle,
The fan motor, wherein the coils wound around the in-phase teeth of the first stator, the second stator, and the third stator are connected in series.
The wings,
A rotor provided on the outer peripheral portion of the blade portion, and a three-phase motor having a stator disposed on the outer peripheral side of the rotor via a gap and provided with teeth on the inner peripheral surface;
A housing disposed so as to cover the outer peripheral side of the stator and the rotor;
In the fan motor with
The stator includes at least one set of a first stator, a second stator, and a third stator,
The first stator includes at least one first tooth group in which a U-phase tooth, a V-phase tooth, and a W-phase tooth are sequentially arranged along the rotation direction of the rotor,
The second stator includes at least one second tooth group in which a V-phase tooth, a W-phase tooth, and a U-phase tooth are sequentially arranged along the rotation direction of the rotor,
The third stator includes at least one third tooth group in which a W-phase tooth, a U-phase tooth, and a V-phase tooth are sequentially arranged along the rotation direction of the rotor,
The first teeth group, the second teeth group, and a part of the third teeth group, the teeth group, the winding direction of the coil wound around the teeth is the first direction,
The remaining part of the first teeth group, the second teeth group, and the third teeth group is in a second direction in which the winding direction of the coil is opposite to the first direction,
The first stator, the second stator, and the third stator are:
The teeth group in which the winding direction of the coil is the first direction is a position where the in-phase teeth are separated by an integral multiple of 360 ° in electrical angle,
The teeth group in which the winding direction of the coil is the second direction is different from the teeth group in which the winding direction of the coil is the first direction. Are integers) apart, and
The coil wound around the in-phase teeth of the first stator, the second stator, and the third stator has the winding direction as the first direction and the current flow direction and winding direction of the coil as the second direction. The fan motor is connected in series so that the direction of current flow in the coil is opposite.
The stator includes two or more sets of a first stator, a second stator, and a third stator,
The said 1st stator, the said 2nd stator, and the said 3rd stator have the same kind of said stator arrange | positioned symmetrically with respect to the rotating shaft of the said blade | wing part, The Claim 1 or Claim 2 characterized by the above-mentioned. Fan motor.
The housing is rectangular;
The fan according to any one of claims 1 to 3, wherein the first stator, the second stator, and the third stator are concentrated on only the short side of the housing. motor.
The stator includes two sets of a first stator, a second stator, and a third stator,
The fan motor according to any one of claims 1 to 3, wherein the housing has a regular hexagonal shape.
The stator includes three or more sets of a first stator, a second stator, and a third stator,
The fan motor according to claim 1 or 2, wherein the first stator, the second stator, and the third stator have the same type of stator arranged in a regular polygon.
The first stator includes two or more first tooth groups,
The second stator includes two or more second tooth groups,
The fan motor according to any one of claims 1 to 6, wherein the third stator includes two or more third tooth groups.
The auxiliary tooth is provided at an end of at least one of the first stator, the second stator, and the third stator, according to any one of claims 1 to 7. Fan motor.
A housing formed with a suction port for sucking indoor air into the interior and a blowout port for supplying conditioned air to the air-conditioning target area;
The fan motor according to any one of claims 1 to 8, housed in the housing,
A heat exchanger housed in the housing, and heat-exchanging the indoor air to form the conditioned air;
An air conditioner characterized by comprising: