WO2006092924A1 - 磁性体、回転子、電動機、圧縮機、送風機、空気調和機及び車載用空気調和機 - Google Patents
磁性体、回転子、電動機、圧縮機、送風機、空気調和機及び車載用空気調和機 Download PDFInfo
- Publication number
- WO2006092924A1 WO2006092924A1 PCT/JP2006/301770 JP2006301770W WO2006092924A1 WO 2006092924 A1 WO2006092924 A1 WO 2006092924A1 JP 2006301770 W JP2006301770 W JP 2006301770W WO 2006092924 A1 WO2006092924 A1 WO 2006092924A1
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- WIPO (PCT)
- Prior art keywords
- rotor
- circumferential direction
- electric motor
- magnetic body
- stator
- Prior art date
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
- H02K16/04—Machines with one rotor and two stators
-
- 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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
Definitions
- the present invention relates to an electric motor, and more particularly to an embedded magnet type rotor.
- the motor can be mounted as a drive source for a compressor or blower.
- Non-Patent Document 1 listed below provides general indicators for permanent magnet excitation synchronous motors.
- the motor constant Km can be expressed by equation (2).
- equation (2) we introduced the number of pole pairs p, the maximum flux linkage ⁇ , the space factor fs, the total cross-sectional area St of the winding slot, the specific resistance p of the winding, and the average length 1 of the unit coil.
- the current waveform is a sine wave, and it is assumed that the magnetic flux alternates in a sine wave shape.
- the loss of the motor especially when the motor is small, is mostly copper loss, and can be considered by omitting iron loss.
- Policy (Considering 0, a slot shape has been proposed in, for example, Patent Document 1 and Patent Document 2. Regarding Policy GO, a shift from the adoption of distributed winding to the adoption of concentrated winding is required. For policy Gii), the only material with a lower resistivity than copper is silver, which is not costly and industrially desirable.
- the surface area of the magnetic pole surface per unit volume of the electric motor can be increased.
- increasing the surface area of the pole face is desirable from two viewpoints.
- One of them employs an armature in which a winding is wound as a stator, and it is desirable to employ a permanent magnet as a field magnet for the rotor. Further, the rotor is a stator. It is desirable to be surrounded by If an armature is used as the rotor, a mechanical commutator for rectifying the winding current is required, which is not desirable from the viewpoint of high durability, high reliability, dust resistance, etc. It is desirable to construct a rotor using a field magnet. Furthermore, from the viewpoint of inserting the electric motor into a compressor, for example, it is desirable that there is a stator that surrounds the rotor from the outside. Therefore, an increase in the surface area of the magnetic pole surface can be a factor that hinders downsizing of the motor.
- Another aspect is also related to policy (vi). Increasing the surface area of the magnetic pole face while keeping the outer diameter of the stator surrounding the rotor in order to reduce the size of the electric motor will increase the inner diameter of the stator. This shortens the slot of the stator in the radial direction and reduces the total cross-sectional area St of the winding slot. This is the opposite of the policy desired in policy (vi).
- Non-Patent Document 2 in an embedded magnet type rotor in which a field magnet is embedded in the rotor, not only magnet torque but also reluctance is provided. torque Can also be used. By making the rotation angle dependence of the magnetic resistance of the iron part relative to the stator of the rotor, the armature current phase during energization can be shifted to the advance side, and the reluctance that occurs due to the saliency of the magnetic resistance. Torque is increased by using torque.
- torque T is expressed by equation (3).
- T Pn (aIq + (Ld-Lq) ldlq) (3)
- Patent Document 7 proposes a technique for performing field weakening without flowing field weakening current.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2000-324728
- Patent Document 2 JP 2004-187370 A
- Patent Document 3 Japanese Patent Laid-Open No. 2002-335658
- Patent Document 4 JP 2002-369467 A
- Patent Document 5 JP 2002-84720 A
- Patent Document 6 Japanese Patent Laid-Open No. 9-56126
- Patent Document 7 Japanese Patent Laid-Open No. 09-233887
- Non-Patent Document 1 Kazuo Onishi, “Torque Evaluation of Permanent Magnet Motor and Examination of Optimal Structure”, Journal of the Institute of Electrical Engineers, D Industrial Application Division, 1995, No. 115, No. 7, pp. 930- 93
- Non-Patent Document 2 Special Committee on Performance Improvement of Specific Application-Oriented Reluctance Torque Applied Motor, “High Performance of Application-specific Reluctance Torque Applied Motor”, IEEJ Technical Report No. 920, March 2003
- the embedded position of the permanent magnet can be brought closer to the central axis of the rotor. This increases the volume of the rotor core located outside the permanent magnet and increases the q-axis inductance Lq.
- the present invention provides a technique for increasing the efficiency per volume of an electric motor.
- the first aspect of the magnetic body (100) includes an annular outer periphery (100a) and an inner periphery (100b), and each of the first portions is alternately arranged in the circumferential direction. (11-14) and a second part (15-18), each of the first parts has holes (41-44) extending substantially in the circumferential direction, and the first part and The second portion is magnetically separated in the circumferential direction.
- a second aspect of the magnetic body (100) that is useful in the present invention is the first aspect of the magnetic body, wherein between the outer periphery (100a) and the inner periphery (100b), It further includes gaps (21-28; 241, 251) provided at both ends in the circumferential direction of the holes (41-44).
- the first portion (11-14) and the second portion (15-18) are magnetically separated by the gap.
- a third aspect of the magnetic body (100) according to the present invention is the second aspect of the magnetic body, wherein the voids (21-28; 241, 251) are defined by the holes (41- 44) extends from the outer periphery (100a) side to the inner periphery (100b) side.
- a fourth aspect of the magnetic body (100) according to the present invention is the first aspect to the third aspect of the magnetic body, wherein the holes (41 to 44) are formed in the first portion (11 to 11). 14) One is provided every time.
- the fifth aspect of the magnetic body (100) according to the present invention is the first to fourth aspects of the magnetic body.
- the second part (15-18) further includes holes (51-54).
- a sixth aspect of the magnetic body (100) that is useful in the present invention is the fifth aspect of the magnetic body, wherein the holes (51 to 54) are circular.
- the first aspect of the rotor (101) according to the present invention is the same as the first aspect of the magnetic body, and is inserted into the holes (41 to 44), and the outer periphery (100a) side and the inner periphery Field magnets (31 to 34) having different magnetic pole faces on the (100b) side.
- a first aspect of the electric motor according to the present invention includes a first aspect of the rotor and an inner peripheral side fixed provided on the inner peripheral (100b) side with respect to the first aspect of the rotor.
- the second aspect of the rotor (101) according to the present invention includes the second to sixth aspects of the magnetic body, and the outer periphery (100a) inserted through the holes (41 to 44). Field magnets (31 to 34) having different magnetic pole faces on the side and the inner circumference (100b) side.
- a second aspect of the electric motor that is effective in the present invention is the second aspect of the rotor and the inner peripheral side provided on the inner peripheral (100b) side with respect to the second aspect of the rotor.
- a third aspect of the electric motor that is useful in the present invention is the second aspect of the electric motor, wherein the gap is
- the width ( ⁇ 1) of (21-28; 241, 251) is determined by the first interval ( ⁇ 2) between the inner circumference (100b) and the inner circumference side stator (200) and the outer circumference (100a ) And the outer circumferential side stator (300) is larger than twice the larger one of the second distances ( ⁇ 3).
- a fourth aspect of the electric motor according to the present invention is the first aspect to the third aspect of the electric motor, wherein the tooth portion (201) of the inner peripheral side stator (200) has the circumferential direction.
- the relative positional relationship in the circumferential direction between the center and the center in the circumferential direction of the tooth portion (301) of the outer stator (300) is variable.
- the compressor according to the present invention is characterized in that the first to fourth aspects of the electric motor are mounted.
- a blower according to the present invention is characterized in that the first to fourth aspects of the electric motor are mounted.
- An air conditioner that can be used in the present invention is a compressor that can be used in the present invention and the present invention. At least one of the blowers is provided.
- An in-vehicle air conditioner according to the present invention includes a compressor on which the fourth aspect of the electric motor is mounted.
- the magnetic material alone or a plurality of the magnetic materials are stacked, and the field magnet is inserted into the hole, whereby the embedded magnet A mold rotor can be constructed. Since the second portion is alternately arranged with respect to the first portion while being magnetically separated in the circumferential direction, so-called q-axis inductance can be increased. Further, since the stators can be provided on the inner peripheral side and the outer peripheral side, respectively, the total area of the winding slot is increased, which can contribute to the configuration of the electric motor with high efficiency per volume.
- the air gap since the air gap has a high magnetic resistance, it contributes to magnetic separation between the first portion and the second portion, and also to the hole. It is possible to prevent magnetic flux from being short-circuited between the pair of magnetic pole faces exhibited by the inserted field magnet, thereby increasing the flow of magnetic flux to and from the outside via the outer circumference and the inner circumference.
- the magnetic body can be formed smaller without impairing the mechanical strength as compared with the structure in which a plurality of holes are provided for each first portion. This contributes to the miniaturization of electric motors that employ a rotor obtained by inserting a field magnet through a hole in a magnetic material. Also, compared to the case where a field magnet is inserted through each of the plurality of holes provided in each first portion, magnetization is easier and there are fewer problems of demagnetization.
- a fastener such as a bolt or a rivet is inserted into the hole, and the magnetic materials or further end plates can be easily and inexpensively used.
- a force is provided in the first part, even if a magnetic material is used for the fastener that penetrates the first part, it contributes not only to the magnetic flux in the q-axis direction, but also to the magnet torque, d axis that contributes to the reluctance torque.
- the direction of magnetic flux is also hindered.
- by providing a hole in the second part it is difficult to inhibit the flow of magnetic flux in the d-axis direction, even though it inhibits the flow of magnetic flux in the q-axis direction.
- the sixth aspect of the magnetic body of the present invention since the size of the hole necessary for obtaining the desired mechanical strength is small, the inhibition of the flow of magnetic flux by the hole is small.
- the second part a shape in which the magnetic material spreads toward the outer periphery or the inner periphery can be obtained.
- the magnetic flux in the q-axis direction between the stator and the second part can easily flow.
- the second portions are alternately provided in the circumferential direction while being magnetically separated from the first portion.
- the so-called q-axis inductance can be increased.
- the stator can be provided on each of the inner peripheral side and the outer peripheral side, it is possible to contribute to the configuration of the motor in which the total area of the winding slot is increased.
- the magnetic flux flows more easily to the inner peripheral side stator and the outer peripheral side stator than to flow the magnetic flux force inside the rotor across the gap. Torque can be increased.
- the rotor side of the tooth portion of the inner peripheral side stator or the tooth portion of the outer peripheral side stator Since the component flowing in the circumferential direction via the rotor side of the rotor can be increased, a field weakening can be equivalently realized without controlling the armature current of the stator. Therefore, there is no increase in copper loss due to the weak flux current or demagnetization of the field magnet due to the negative d-axis current. Since the adjustment of the relative positional relationship is easier to finely adjust than the adjustment of the number of times of winding of the winding line, it can be commonly used for electric motors having different rotational speeds to be set.
- the efficiency of compression, blowing, and air conditioning is high.
- the rotational speed can be easily finely adjusted even when operating at a low voltage.
- FIG. 1 is a plan view showing a configuration of a magnetic body that is effective in the first embodiment of the present invention.
- FIG. 2 is a cross-sectional view showing a configuration of a rotor that is effective in the first embodiment.
- FIG. 3 is a partial cross-sectional view illustrating gaps.
- FIG. 4 is a cross-sectional view illustrating the configuration of the electric motor according to the present invention.
- FIG. 5 is a sectional view partially showing the configuration of the electric motor.
- FIG. 6 is a diagram conceptually showing how a d-axis magnetic flux flows through a rotor.
- FIG. 7 is a diagram conceptually showing how q-axis magnetic flux flows through a rotor.
- FIG. 8 is a cross-sectional view showing a configuration of an electric motor.
- FIG. 9 is a circuit diagram showing an aspect in which armature windings are connected.
- FIG. 10 is a circuit diagram showing an aspect in which armature windings are connected.
- FIG. 11 is a circuit diagram showing a mode in which armature windings are connected.
- FIG. 12 is a circuit diagram showing an aspect in which armature feeders are connected.
- FIG. 13 is a plan view showing the configuration of a magnetic body according to a second embodiment of the present invention.
- FIG. 14 is a cross-sectional view showing a configuration of an electric motor that works according to a third embodiment of the present invention.
- FIG. 1 is a plan view showing a configuration of a magnetic body 100 that is effective in the first embodiment of the present invention.
- the magnetic body 100 can contribute to an embedded magnet type rotor, as will be described later.
- the magnetic body 100 may extend in a direction perpendicular to the paper surface, or may be thin in a direction perpendicular to the paper surface.
- it can be formed of a dust core and used as a rotor core.
- steel plates can be used and laminated together to be used as a rotor core.
- Fig. 1 can be grasped as a cross-sectional view of the core.
- the magnetic body 100 includes an outer periphery 100a and an inner periphery 100b.
- the force of the two concentric circles does not necessarily need to be a perfect circle. Design changes can be made as appropriate.
- the magnetic body 100 Since it is possible to provide a stator on each of the inner circumference 100b side and the outer circumference 100a side, the magnetic body 100 contributes to the configuration of the electric motor in which the total cross-sectional area of the stator slot of the stator is increased. It is out. [0057]
- the magnetic body 100 is alternately divided into first portions 11 to 14 and second portions 15 to 18 in the circumferential direction.
- the first portions 11 to 14 and the second portions 15 to 18 are magnetically separated in the circumferential direction.
- a mode in which the gaps 21 to 28 are magnetically separated is illustrated, and for example, a magnetic flux is prevented from flowing in the circumferential direction between the first portion 11 and the second portion 15.
- the first portions 11 to 14 have holes 41 to 44 extending substantially in the circumferential direction, respectively.
- the gaps 21 to 28 are provided at both ends in the circumferential direction of the holes 41 to 44 between the outer periphery 100a and the inner periphery 100b.
- voids 21 and 22 are at the end of hole 41
- voids 23 and 24 are at the end of hole 42
- voids 25 and 26 are at the end of hole 43
- voids 27 and 28 are at the end of hole 44. Each of them is provided.
- the first portion 11 is divided into an outer peripheral portion 1la closer to the outer periphery 100a than the hole 41 and an inner peripheral portion ib closer to the inner periphery 100b and closer to the inner periphery 100b.
- the first portion 12 is divided into an outer peripheral portion 12a closer to the outer periphery 100a than the hole 42 and an inner peripheral portion 12b closer to the inner periphery 100b.
- the first portion 13 is more than the hole 43.
- the first portion 14 has an outer peripheral portion 14a closer to the outer periphery 100a than the hole 44, It is divided into the inner periphery 14b on the side close to the periphery 10 Ob.
- FIG. 2 is a cross-sectional view showing a cross section perpendicular to the rotation axis of the configuration of the rotor 101 that is effective in the first embodiment.
- the rotor 101 is configured by inserting field magnets 31 to 34 having different magnetic pole surfaces on the outer circumference 100a side and the inner circumference 100b side into holes 41 to 44, respectively. Further, since the configuration in which the number of pole pairs is two is illustrated, adjacent ones of the field magnets 31 to 34 exhibit magnetic pole surfaces having different polarities toward the outer periphery 100a side.
- the magnetic body 100 or a plurality of the magnetic bodies 100 are laminated, and the field magnets 31 to 34 are inserted into the holes 41 to 44, thereby forming the embedded magnet type rotor 101. can do.
- the second portions 15 to 18 are alternately provided with respect to the first portions 11 to 14 while being magnetically separated in the circumferential direction, they pass through a stator (described later) provided inside the rotor 101. Magnetic flux flows through the second portions 15-18, and the circumferential width W of the second portions 15-18 can be increased. As a result, the q-axis inductance Lq can be increased.
- FIG. 3 is a partial cross-sectional view illustrating the gaps 241, 251 as variations of the gaps 24, 25.
- the gaps 241, 251 may be bent.
- the gaps 21 to 28 have a thin portion between the outer circumference 100a and the inner circumference 100b, if the mechanical strength of the rotor 101 permits, the gaps 21 to 28 have an outer circumference 100a and an inner circumference. You may penetrate either 100b. Even if it penetrates both, it is only necessary to install an end plate and connect the first part 11 to 14 and the second part 15 to 18.
- the gaps 21 to 28 are not necessarily provided continuously between the outer periphery 100a and the inner periphery 100b.
- the air gaps 21 to 28 may be divided by leaving the second portions 15 to 18 thin enough to be magnetically separated from the first portions 11 to 14 in the circumferential direction.
- the air gaps 21 to 28 have high magnetic resistance, it contributes to magnetic separation between the first portion 11 to 14 and the second portion 15 to 18, and the field magnet is inserted into the holes 41 to 44. Prevents short circuit of magnetic flux between a pair of magnetic pole faces exhibited by 31-34. Therefore, the inflow and outflow of the magnetic flux between the outer periphery 100a and the inner periphery 100b, that is, between the stator and the stator can be increased. For this reason, it is desirable that the gaps 21 to 28, 241, and 251 extend from the outer periphery lOOaftlJ force of the ridges 41 to 44 to the inner periphery lOObftlJ.
- one hole 41 to 44 is provided for each of the first portions 11 to 14.
- the magnetic body 100 can be made smaller without losing the mechanical strength, and the rotation obtained by inserting a field magnet into the hole Contributes to miniaturization of electric motors that employ children.
- a plurality of holes are provided for each of the first portions 11 to 14, and there is less problem of demagnetization than when a field magnet is inserted into each of the holes. It is also possible to embed a magnet material in the hole and magnetize the force to obtain a field magnet. However, compared with a configuration in which a plurality of the holes are present in the first portions 11 to 14, the magnetizing is performed. Is easy.
- FIG. 4 is a cross-sectional view illustrating the configuration of an electric motor using the rotor 101.
- the rotor 101 has a configuration in which an inner peripheral side stator 200 is provided on the inner peripheral side 100b side, and an outer peripheral side stator 300 is provided on the outer peripheral side 100a side. As described above, by providing the stator inside and outside of the rotor 101, the total cross-sectional area of the winding slot can be increased.
- the outer peripheral side stator 300 has a tooth portion 301 extending in the radial direction, and its tip (rotor 1). 01 side) extends in the circumferential direction to form a wide portion 302.
- the inner peripheral side stator 200 has a tooth portion 201 extending in the radial direction, and the tip (rotor 201 side) extends in the circumferential direction to form a wide portion 202.
- the armature winding is omitted.
- the rotor 101 and the outer stator 300 mainly flow in and out of the magnetic flux through the teeth 301, and the rotor 101 and inner stator 200 mainly flow in and out of the magnetic flux through the teeth 201. To do.
- the field magnets 31 and 33 present the south pole magnetic pole surface
- the field magnets 32 and 34 represent the north pole magnetic pole surface toward the outer stator 300, respectively.
- the flow of magnetic flux by the field magnets 31 to 34 is illustrated as an example.
- FIG. 5 is an enlarged cross-sectional view partially showing the space between the rotor 101, the inner peripheral side stator 200, and the outer peripheral side stator 300.
- a first interval ⁇ 2 is provided between the inner periphery 100b and a second interval ⁇ 3 is provided between the inner periphery 100b and the outer periphery 100a.
- a side stator 300 is provided.
- the width ⁇ 1 of the gaps 21 to 28, 241, 251 is preferably larger than twice the larger one of the first interval ⁇ 2 and the second interval ⁇ 3.
- the magnetic resistance in the circumferential direction between the first part 11-14 and the second part 15-18 is higher than the magnetic resistance between the rotor 101, the inner peripheral side stator 200, and the outer peripheral side stator 300. This is to promote the inflow and outflow of magnetic flux between the rotor and the stator.
- Fig. 6 is a diagram conceptually showing the d-axis magnetic flux flowing through the rotor 101
- Fig. 7 conceptually shows the q-axis magnetic flux ( ⁇ a, ⁇ ) flowing through the rotor 101.
- the d-axis magnetic flux ⁇ c flows between the field magnets 31 and 33 and the field magnets 32 and 34. Hence d-axis magnetic flux. Will flow only in the first part 11-14.
- the q-axis magnetic flux ⁇ & flows through the first portions 11 to 14, more specifically, the outer peripheral portions 11a, 12a, 13a, and 14a. However, q-axis magnetic flux ⁇ ⁇ ) also flows through the second parts 15-18. Therefore, widening the width W in the circumferential direction of the second parts 15-18 is desirable from the viewpoint of increasing the q-axis inductance Lq.
- the second parts 15 to 18 are magnetic in the circumferential direction relative to the first parts 11 to 14.
- the second portions 15 to 18 together with the first portions 11 to 14 serve as field magnets 31 to 34 for the outer stator 300. This will reduce the number of flux linkages to the inner stator 200.
- This can increase the q-axis inductance L q by increasing the circumferential width W of the second part 15-18, and even if the reluctance torque can be increased, the magnet torque can be reduced. become.
- the second portions 15 to 18 are alternately provided while being magnetically separated in the circumferential direction with respect to the first portions 11 to 14, so that even if this width W is increased, FIG.
- the magnetic flux generated by the field magnets 31 to 34 is prevented from being short-circuited inside the rotor 101 as shown in FIG.
- the total cross-sectional area of the winding slot may be further increased with the device of the slot shape introduced in Patent Document 1 and Patent Document 2.
- the inner peripheral side stator 200 is not a rotor, which is an armature around which a winding (not shown) is wound. If the inner armature of the rotor 101 is a rotor, a mechanical commutator is required as described above, and the outer armature 300, which is an outer armature, rotates relative to the outer armature. .
- This relative rotation reduces the relative rotational speed of any armature with respect to the field of the rotor 101, leading to a reduction in the efficiency of the motor. In addition, this relative rotation disturbs the path of the q-axis magnetic flux ⁇ b and increases the fluctuation of the reluctance torque, making its use difficult.
- FIG. 8 is a cross-sectional view of an electric motor including the rotor 101, the inner peripheral side stator 200, and the outer peripheral side stator 300, and conceptually shows a cross section including the rotation center.
- the rotor 101 is connected to a rotating shaft 103 via an end plate 102, and the rotating shaft 103 is supported by bearings 104 and 105.
- the inner peripheral side stator 200 and the outer peripheral side stator 300 are supported by support portions 204 and 304, respectively.
- armature winding wires 203 and 303 are wound around the inner peripheral side stator 200 and the outer peripheral side stator 300, respectively.
- FIG. 4 corresponds to a cross-sectional view in which the support portions 204 and 304 and the armature winding wires 203 and 303 are omitted at a position IV-IV in FIG.
- FIG. 9 and FIG. 10 are circuit diagrams illustrating an aspect in which the armature feeder wires 203 and 303 (FIG. 8) are connected.
- the coils 203U, 203V, and 203W shown in FIGS. 9 and 10 are the U-phase, V-phase, and W-phase coils of the armature winding wire 203, respectively.
- the coils 303U, 303V, and 303W are the armatures, respectively. It is a U-phase, V-phase, and W-phase coil of ⁇ wire 303.
- FIGS. 9 and 10 show the case where the armature winding wires 203 and 303 are connected in series and in parallel in each phase. In the present embodiment, it is possible to adopt such a shift mode between the series connection and the parallel connection.
- FIGS. 9 and 10 show the case where the star connection is adopted and the armature winding wires 203 and 303 are connected in series and in parallel in each phase.
- any of such serial connection and parallel connection can be employed.
- a delta connection may be adopted, and the armature winding wires 203 and 303 may be connected in series and in parallel in each phase.
- the star connection is used and the armature windings 203 and 303 are connected in series for each phase. It is desirable.
- FIG. 13 is a plan view showing the configuration of the magnetic body 100 according to the second embodiment of the present invention. With respect to the magnetic body 100 shown in FIG. 1, holes 51 to 54 are further provided in the second portions 15 to 18, respectively.
- Fasteners such as bolts and rivets are inserted into the holes 51 to 54, and the magnetic bodies 100 or even the end plates 102 (see Fig. 8) can be fastened easily and inexpensively using them.
- the second portions 15 to 18 are alternately provided while being magnetically separated in the circumferential direction with respect to the first portions 11 to 14, this width W is easily increased. Therefore, there is a sufficient area for providing the holes 51 to 54, and the holes 51 to 54 can be enlarged. Even if the holes 51 to 54 are provided, the flow of the q-axis magnetic flux ⁇ ⁇ ) is obstructed, but it is easy to secure to some extent.
- the holes 51-54 are circular. In this case, the corners where stress is concentrated and the part that functions as a rib other than the hole can be made thicker. Therefore, the dimensions of the holes 51 to 54 necessary for obtaining the desired mechanical strength are reduced, and the q due to the holes 51 to 54 is reduced. The inhibition of axial flux ⁇ b can be reduced.
- the stator 200, 300 (see Fig. 4) and the second part Make q-axis magnetic flux ⁇ b between 15 and 18 easier to flow.
- the fastener inserted through the holes 51 to 54 is made of a magnetic material.
- FIG. 14 is a cross-sectional view illustrating the configuration of an electric motor that works according to the third embodiment of the invention.
- the circumferential center of the tooth portion 201 of the inner stator 200 and the circumferential center of the tooth portion 301 of the outer stator 230 are relatively relative to the circumferential direction.
- the correct position is shifted!
- Fig. 14 illustrates the case where the mechanical angle is shifted by 30 degrees, which corresponds to a shift of 60 degrees as the electrical angle.
- the armature winding wires 203 and 303 are wound around some of the tooth portions 201 and 301! /, And only the ones are drawn.
- Such positional deviation can be mechanically performed before or during use of the electric motor.
- the displacement may be caused manually before using the electric motor, or the displacement may be caused by an actuator such as a servo motor during use.
- This actuator can be provided, for example, in the support portion 204 shown in FIG.
- the magnetic flux ⁇ a is the magnetic flux generated from the magnetic pole surface (here, N pole) of the magnet 32
- the magnetic flux ⁇ b is the magnetic flux generated from the magnetic pole surface (here, S pole) of the magnet 33.
- the magnetic flux ⁇ a returns to the magnetic pole surface on the inner peripheral side of the magnet 32.
- the yoke of the outer peripheral side stator 300 is linked to the armature winding 303 via the tooth portion 301, but the tooth portion 201 of the inner peripheral side stator 200 is linked to the armature winding 203.
- the magnetic flux ⁇ b returns to the magnetic pole surface on the inner peripheral side of the magnet 33, the force interlinked with the armature winding 203 via the teeth 201 of the inner peripheral stator 200.
- the outer stator 300 In the tooth portion 301, there is a path that passes through the wide portion 302 without interlinking with the armature winding wire 303.
- FIG. 14 shows a positional shift equivalent to 60 degrees as the electrical angle, and illustrates the case where the flux weakening is utilized to the maximum extent.
- the magnetic flux density of the wide portions 202 and 302 of the tooth portion increases during the flux weakening control, so that the iron loss in the wide portions 202 and 302 increases.
- the magnetic flux density passing through the tooth portions 202 and 302 other than the wide portions 202 and 302 is reduced, the iron loss in the longer magnetic path can be reduced, so that the total iron loss of the motor is reduced.
- Patent Document 7 uses permeability anisotropy depending on the rolling direction of grain-oriented electrical steel sheets and embeds adjustment plugs in the stator. However, since this impairs the magnetic flux density of the stator itself, it is desirable to reduce the size of the motor.
- the electric motor according to the present embodiment is suitable when the electric motor is used to operate at a low pressure because it is easy to finely adjust the rotational speed even when the same current is used.
- the number of times of winding is small, so it is not easy to change the number of turns and make fine adjustments. Changing the number of wrinkles is also a force that is a discrete numerical control.
- the rotational speed can be finely adjusted without depending on the number of strokes. Therefore, for example, an in-vehicle air conditioner that operates at a low voltage such as 42 V or less. Compressor [This; 0
- the electric motor according to the present invention can be mounted on the compressor or blower of a normal air conditioner to improve the efficiency of compression or blowing. So at least the compressor and blower
- the air conditioner provided with either one of them can improve the air conditioning efficiency.
- the magnetic body 100 may have holes 51 to 54.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06712913.0A EP1855371B1 (en) | 2005-02-28 | 2006-02-02 | Magnetic body, rotor, motor, compressor, fan, air conditioner, and on-vehicle air conditioner |
JP2007505823A JP4737193B2 (ja) | 2005-02-28 | 2006-02-02 | 回転子、電動機、圧縮機、送風機、空気調和機及び車載用空気調和機 |
ES06712913.0T ES2581980T3 (es) | 2005-02-28 | 2006-02-02 | Cuerpo magnético, rotor, motor, compresor, ventilador, climatizador y climatizador a bordo de un vehículo |
CN200680004743XA CN101120499B (zh) | 2005-02-28 | 2006-02-02 | 磁性体、转子、电动机、压缩机、鼓风机、空调机及车载用空调机 |
US11/885,160 US7902712B2 (en) | 2005-02-28 | 2006-02-02 | Magnetic member, rotor, motor, compressor, blower, air conditioner and vehicle-mounted air conditioner |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2005-053206 | 2005-02-28 | ||
JP2005053206 | 2005-02-28 |
Publications (1)
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WO2006092924A1 true WO2006092924A1 (ja) | 2006-09-08 |
Family
ID=36940965
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/301770 WO2006092924A1 (ja) | 2005-02-28 | 2006-02-02 | 磁性体、回転子、電動機、圧縮機、送風機、空気調和機及び車載用空気調和機 |
Country Status (6)
Country | Link |
---|---|
US (1) | US7902712B2 (ja) |
EP (1) | EP1855371B1 (ja) |
JP (1) | JP4737193B2 (ja) |
CN (1) | CN101120499B (ja) |
ES (1) | ES2581980T3 (ja) |
WO (1) | WO2006092924A1 (ja) |
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US20100117479A1 (en) * | 2006-10-10 | 2010-05-13 | Force Engineering Limited | Electromotive machines |
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100117479A1 (en) * | 2006-10-10 | 2010-05-13 | Force Engineering Limited | Electromotive machines |
US8400044B2 (en) * | 2006-10-10 | 2013-03-19 | Force Engineering Limited | Electromotive machines |
WO2008059923A1 (fr) * | 2006-11-16 | 2008-05-22 | Daikin Industries, Ltd. | Machine électrique rotative, compresseur, ventilateur et climatiseur |
JP2008131663A (ja) * | 2006-11-16 | 2008-06-05 | Daikin Ind Ltd | 回転電機、圧縮機、送風機、空気調和機 |
JP2009136075A (ja) * | 2007-11-29 | 2009-06-18 | Hiroshi Shimizu | アウターロータモータ |
JP2009247095A (ja) * | 2008-03-31 | 2009-10-22 | Jfe Steel Corp | リラクタンスモータの回転子およびリラクタンスモータの回転子用鋼板の成形方法 |
JP2011244643A (ja) * | 2010-05-20 | 2011-12-01 | Denso Corp | ダブルステータ型モータ |
US8860274B2 (en) | 2010-05-20 | 2014-10-14 | Denso Corporation | Motor provided with two stators arranged radially inside and outside rotor |
WO2022145035A1 (ja) * | 2020-12-29 | 2022-07-07 | ヤマハ発動機株式会社 | 電気機械 |
Also Published As
Publication number | Publication date |
---|---|
CN101120499A (zh) | 2008-02-06 |
EP1855371B1 (en) | 2016-04-13 |
EP1855371A4 (en) | 2015-04-15 |
US20090212652A1 (en) | 2009-08-27 |
EP1855371A1 (en) | 2007-11-14 |
US7902712B2 (en) | 2011-03-08 |
JPWO2006092924A1 (ja) | 2008-08-07 |
CN101120499B (zh) | 2012-01-11 |
JP4737193B2 (ja) | 2011-07-27 |
ES2581980T3 (es) | 2016-09-08 |
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