JP2012205420A - Motor, pump, and apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor that prevents upsizing of a stator and reduces cogging torque, and to provide a pump having the motor and an apparatus having the motor or the pump.SOLUTION: A motor includes: a stator 6 having a plurality of plate-like bodies 9 that are laminated so as to form a core 8; and a rotor 2 that has a circumferential surface 3 along a rotational direction thereof. The core 8 is provided with magnetic pole portions 12 each having pole faces facing the circumferential surface 3. Each of the magnetic pole portions 12 has: a base 14; a first extension 17 that is provided at a first end of the base 14; and a second extension 18 that is provided at a second end of the base 14. The pole face of at least one of the first extension 17 and the second extension 18 is inclined in a circumferential direction.

Description

  The present invention relates to a motor, a pump including the motor, and a device including the motor or the pump.

  Conventionally, as a motor, there is a brushless motor including an annular rotor and a stator that faces the rotor by surrounding the outer periphery of the rotor, as shown in Patent Document 1 and the like.

  The brushless motor includes an annular yoke, an annular stator core having a plurality of teeth extending from the yoke inward in the radial direction of the stator and spaced apart in the circumferential direction of the stator, and a main portion of the teeth And a coil wound around. The stator core is formed by laminating electromagnetic steel plates, and an axially extending protrusion that extends outward in the axial direction of the stator core is provided at the inner end of the tooth in the radial direction of the stator core. Further, the brushless motor changes the position in the circumferential direction of only one boundary portion of the first and second step portions among the inner end portions of the teeth, thereby reducing the cogging torque.

JP 2009-44799 A

  However, in the brushless motor described above, the change in position is only at one point in the boundary portion, and the position is changed at the inner end surface of the main portion of the tooth, so the cogging torque cannot be reduced much and smooth rotation. It is difficult to improve motor efficiency.

  Therefore, in view of this situation, an object is to provide a motor with reduced cogging torque, a pump including the motor, and a device including the motor or the pump while suppressing an increase in cost.

  In order to solve the above-described problems, a motor according to the present invention includes a stator in which a core is formed by stacking a plurality of plate-like bodies, and a rotor that is driven to rotate by the stator, and the rotor extends in the rotation direction. A magnetic pole portion having a peripheral surface, the core having a magnetic pole surface facing the peripheral surface, and the magnetic pole portion provided at an end of the core on the rotor side; and A first extension provided to extend to one end of the base in the axial direction of the rotation axis; a second extension provided to extend to the other end of the base in the axial direction; And at least one of the first extension portion and the second extension portion is inclined in the circumferential direction of the rotation axis.

  As the motor, the magnetic pole surface of the first extension portion and the magnetic pole surface of the second extension portion are each inclined in the circumferential direction, and the magnetic pole surface of the first extension portion is made to be in the second extension portion. It is preferable to incline in the opposite direction with respect to the magnetic pole surface.

  As the motor, the peripheral surface has a gradient in the axial direction, and at least one of the magnetic pole surfaces of the first extension portion and the second extension portion has a diameter of the rotation axis parallel to the gradient. It is preferable to incline in the direction.

  In this motor, it is preferable that the magnetic pole surface of the first extension portion and the magnetic pole surface of the second extension portion are inclined in the radial direction in parallel with the gradient.

  Moreover, the pump of this invention is equipped with the above-mentioned motor, It is characterized by the above-mentioned.

  Moreover, the apparatus of this invention is provided with the above-mentioned motor or the above-mentioned pump.

  By adopting such a configuration, it is possible to suppress the increase in size of the stator and to easily reduce the cogging torque.

It is a perspective view of the motor of a 1st embodiment. It is a perspective view of the section of the stator of a motor same as the above. It is a perspective view of the core of a stator same as the above. It is explanatory drawing of a cogging torque and a rotation angle, (a) is the motor of 1st Embodiment, (b) is a comparative example. It is sectional drawing of the motor of the motor of 2nd Embodiment. It is a perspective view of a stator same as the above. It is sectional drawing of the pump of 3rd Embodiment. It is composition explanatory drawing of the apparatus of 4th Embodiment. It is composition explanatory drawing of the apparatus of 5th Embodiment. It is a structure explanatory view of the device of a 6th embodiment.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

(First embodiment)
As shown in FIG. 1, the motor 1 of the present embodiment includes a stator 6 that generates a magnetic field, a rotor 2 that is rotationally driven by the magnetic field of the stator 6, and a shaft member (not shown) that serves as the rotational axis of the rotor 2. ).

  The rotor 2 is formed in a substantially cylindrical shape, has a plurality of magnets (not shown) arranged in the circumferential direction, a shaft member is inserted substantially concentrically into the cylinder, and is rotatable around the axis of the shaft member. Supported by The rotor 2 is rotationally driven by the stator 6 with the shaft member as the center of rotation. In the following description, unless otherwise specified, the axial direction Ax of the rotor 2 is simply referred to as the axial direction Ax, the circumferential direction of the rotor 2 is simply referred to as the circumferential direction, and the direction from the axial center of the rotor 2 to the outer peripheral side is radially outside. And the inward radial direction of the rotor 2 is simply used as a reference. For convenience, the shape viewed in the axial direction Ax is referred to as a front view shape.

  The stator 6 is disposed on the outer periphery of the rotor 2. The stator 6 includes a core 8 formed of a magnetic metal material, a coil 7 in which a conducting wire is wound around the core 8, and an insulating member (not shown) that insulates the core 8 and the coil 7 from each other. With.

  The core 8 is provided at an annular portion 10 that is substantially concentric with the rotor 2 and is annular when viewed from the front, a tooth 11 that protrudes radially inward from an inner peripheral surface of the annular portion 10, and an end portion of the tooth 11 on the rotor 2 side. The main body is composed of the magnetic pole portion 12. As shown in FIG. 2, the core 8 includes a first plate-like member 9 a (plate-like body 9) having a part of the magnetic pole portion 12, the annular portion 10, and the teeth 11 in an integrated manner in the axial direction Ax. It is formed by laminating.

  The teeth 11 protrude from the core 8 in the radially inward direction and are formed in a prismatic shape, and a plurality of teeth 11 are arranged at substantially equal intervals in the circumferential direction. Each of the teeth 11 is an end portion on the rotor 2 side, in which a conductive wire serving as the coil 7 is wound around the side surface of a column having an end side along the protruding direction (inward radial direction) via an insulating member. A magnetic pole portion 12 is provided at the protruding tip.

  As shown in FIG. 3, the magnetic pole portion 12 has a circular arc shape in front view that is longer in the circumferential direction than the teeth 11, the arc is substantially concentric with the rotor 2, and the dimension in the axial direction Ax is the magnet of the rotor 2. Is substantially the same as the dimension in the axial direction Ax. Therefore, the magnetic pole portion 12 has a magnetic pole surface 13 in which the inner peripheral surface of the arc faces the outer peripheral surface (peripheral surface 3) of the rotor 2 in the radially inward direction.

  The magnetic pole portion 12 is mainly composed of a base portion 14 connected to the protruding tip of the tooth 11 and extension portions 16 respectively attached to both end portions in the axial direction Ax of the base portion 14, and the extension portion 16 is a base portion 14. Two are provided for each.

  The base portion 14 is connected to the teeth 11 at substantially the middle in the circumferential direction of the arc, and the dimension in the axial direction Ax is substantially the same as that of the teeth 11. The first plate member 9 a is integrated with the core 8 and the teeth 11. It is formed by laminating in the axial direction Ax. And the base part 14 protrudes in the circumferential direction at the edge part of a circular arc from the connection site | part with the teeth 11, and is substantially the same dimension. The side end sides (sides formed by lamination) of the base portion 14 located at the end of the arc are aligned substantially in parallel with the axial direction Ax, and the magnetic pole surface 15 of the base portion 14 is radially outside the center of the surface. When viewed in the direction, it is substantially rectangular.

  Further, the base portion 14 has a concave portion (not shown) recessed in the axial direction Ax on an end surface (first end surface, second end surface) in the axial direction Ax, and a convex portion (not shown) provided in the extension portion 16. Is fitted into the recess, and the extension 16 is attached to the end face.

  The extension 16 is formed by laminating the second plate-like member 9b (plate-like body 9) in the axial direction Ax, and the second plate-like member 9b has an arc shape substantially the same shape and the same size as the base portion 14. The second plate-like member 9b is different in shape from the first plate-like member 9a. And two extension parts 16 provided in base 14 are the above-mentioned 1st extension part 17 attached to the above-mentioned 1st end face in axial direction Ax of base 14, and the above-mentioned 2nd opposite side of the 1st end face. A distinction is made between the second extension 18 attached to the end face.

  The first extension portion 17 is formed by laminating the second plate-like member 9b in the axial direction Ax while continuously shifting the second plate-like member 9b toward one side in the circumferential direction and moving toward the above-described one in the circumferential direction. Thus, the second plate-like members 9b are arranged in a stepped shape with the extended tip side convex.

  Therefore, in the first extension portion 17, a virtual straight line connecting the end portions in the circumferential direction of the second plate-like member 9 b in the axial direction Ax becomes a straight line inclined in the circumferential direction. Since the straight line is an approximate straight line of the side edge of the magnetic pole surface 19, the magnetic pole surface 19 of the first extension 17 is inclined in the circumferential direction when viewed in the radially outward direction passing through the center of the surface. It has a substantially parallelogram shape.

  The second extension portion 18 is pivoted while continuously shifting the second plate-like member 9b with substantially the same dimension in the opposite direction (the other side) to the direction in which the first extension portion 17 is shifted in the circumferential direction (one side described above). They are stacked in the direction Ax. And the 2nd extension part 18 becomes the shape which arranged the 2nd plate-shaped member 9b in the step shape which made the extension front end side convex toward the above-mentioned other side of the circumferential direction.

  Therefore, in the second extension 18, a virtual straight line connecting the circumferential end of the second plate-like member 9 b in the axial direction Ax becomes a straight line inclined in the circumferential direction. Since the straight line is an approximate straight line of the side edge of the magnetic pole surface 20, the magnetic pole surface 20 of the second extension 18 is inclined in the circumferential direction when viewed in the radially outward direction passing through the center of the surface. It has a substantially parallelogram shape. Further, the side edge of the first extension 17 and the side edge of the second extension 18 are substantially parallel in the circumferential direction, the magnetic pole surfaces 19 and 20 of both extensions 16 have substantially the same shape, and the extension tips are circumferential. Convex with respect to the base 14 in the opposite direction.

  As described above, by providing the extension portions 16 in which the magnetic pole surfaces 19 and 20 are inclined in the circumferential direction at both ends in the axial direction Ax of the base portion 14, a gap between the magnetic pole portions 12 adjacent in the circumferential direction is provided. The base portion 14 is substantially parallel to the axial direction Ax, and the extension portion 16 is inclined with respect to the axial direction Ax. Since the inclined gap is provided, the number of times of cogging is increased, so that the cogging torque can be easily reduced as compared with the conventional comparative example that does not have a cogging torque countermeasure as shown in FIG.

  Further, the teeth 11 are connected to the base portion 14, and the dimensions of the teeth 11 in the axial direction Ax are smaller than those of the magnetic pole face 13 by making the dimensions of the magnetic pole surface 13 of the magnetic pole portion 12 and the magnet approximately the same in the axial direction Ax. The size can be suppressed. Therefore, it is easy to secure a winding area for winding the conductive wire around the tooth 11 by suppressing the enlargement of the coil 7 such as an increase in the winding width of the conductive wire due to the enlargement of the tooth 11. And since the shape of the base 14 formed integrally with the teeth 11 is maintained to be substantially the same as the conventional shape, it can be easily suppressed at a low cost.

  That is, the motor 1 can suppress the increase in size of the motor 1 and can easily reduce the cogging torque, and can easily be configured with low cost, low noise, and low vibration.

  Note that the method of attaching the extension 16 to the base 14 is not limited to the fitting of the concave portion and the convex portion, but using so-called caulking that is struck and tightened, using a fixing tool such as a pin, leather welding, adhesion, etc. It may be used, and is not limited to these exemplary configurations.

  Further, only one of the two extension portions 16 may be inclined. In this case, it is preferable that the inclined magnetic pole surface is inclined in such a direction that the extended tip is convex toward the rotation direction of the rotor 2.

  Further, the motor 1 is not limited to the so-called inner rotor type in which the rotor 2 is disposed on the inner periphery of the stator 6 as shown in FIG. 1, but may be an outer rotor type in which the rotor 2 is disposed on the outer periphery of the stator 6. The configuration is not limited to the example.

(Second Embodiment)
Hereinafter, the motor 1 according to the second embodiment will be described with reference to FIGS. 5 and 6. In addition, the same code | symbol is attached | subjected to the structure similar to 1st Embodiment, and an equivalent member, and the overlapping description is abbreviate | omitted. The definition of the direction reference is the same as that in the first embodiment.

  In the motor 1 of the present embodiment, the rotor 2 is mainly composed of a molded product of a magnetic material combined with a resin material. By using the molding process, as shown in FIG. A draft angle is provided on the peripheral surface 3 as a gradient in the axial direction Ax. Therefore, the rotor 2 has a cylindrical shape (conical cylinder shape) in which the outer diameter of the first end portion 4 is larger than the outer diameter of the second end portion 5 and the peripheral surface 3 is inclined.

  In the stator 6, as shown in FIG. 6, each of the extension portions 16 has slopes in which the extension tips are convex in the circumferential direction on the magnetic pole surfaces 19, 20, and the extension tips of the magnetic pole surfaces 19, 20 are opposite in the circumferential direction. It is convex. And the extension part 16 has a gradient in the axial direction Ax on the magnetic pole surfaces 19 and 20, respectively.

  In the first extension portion 17, the radial dimension of the magnetic pole surface 19, which is the distance in the radial direction between the magnetic pole surface 19 and the rotation axis, gradually increases (outward in the radial direction) toward the distal end of the extension. The extended tip is convex in the radially outward direction with respect to the base 14. In the first extension portion 17, the dimension of the radial gap (air gap) between the magnetic pole surface 19 and the peripheral surface 3 of the rotor 2 is substantially constant, and the magnetic pole surface 19 and the peripheral surface 3 are in the radial direction. Located approximately parallel.

  Due to the gradient of the second extension 18, the radial dimension of the magnetic pole surface 20, which is the distance in the radial direction between the magnetic pole surface 20 and the rotation axis, gradually decreases toward the distal end of the extension (inward in the radial direction). The extended tip is convex in the radial direction with respect to the base 14. In the second extension portion 18, the radial gap (air gap) between the magnetic pole surface 20 and the peripheral surface 3 is substantially constant, and the magnetic pole surface 20 and the peripheral surface 3 are substantially parallel in the radial direction. To position.

  Further, the magnetic pole surface 19 of the first extension portion 17 and the magnetic pole surface 20 of the second extension portion 18 have a gradient with substantially the same inclination in the axial direction Ax, and both the magnetic pole surfaces 19 and 20 are substantially in the axial direction Ax. Line up in parallel. The size of the air gap of the second extension 18 is smaller than the size of the air gap of the first extension 17.

  Therefore, due to the gradient, the magnetic pole surfaces 19 and 20 of the two extension portions 16 face each other substantially in parallel with the peripheral surface 3, and the protruding directions of the extension tips of the magnetic pole surfaces 19 and 20 are opposite to each other. .

  As described above, since the magnetic pole surfaces 19 and 20 have a gradient in the axial direction Ax, the magnetic pole surface 13 of the magnetic pole portion 12 is brought closer to the peripheral surface 3 of the rotor 2 than the magnetic pole surface without the gradient ( The stator 6 can be arranged (with the air gap narrowed), and the motor efficiency is easily improved.

  Of the two extending portions 16, only one magnetic pole surface 19 or 20 may have a gradient in the axial direction Ax.

(Third embodiment)
The pump 30 of the third embodiment will be described below with reference to FIG. In addition, the motor 1 of 1st Embodiment and the substantially same structure or an equivalent structure attach | subject the same code | symbol, and the overlapping description is abbreviate | omitted. The definition of the direction reference is the same as that in the first embodiment.

  The pump 30 of the present embodiment includes a motor 43 serving as a drive source, an impeller 34 that is driven by the motor 43 to flow fluid, a control unit 41 that controls the motor 43, a case 31 that forms an outer shell, and blades And a separation plate 37 that isolates the stator 6 from the vehicle 34. The pump 30 includes a case 31 and a separation plate 37 to form a pump chamber. The impeller 34 and the rotor 2 are accommodated in the pump chamber, and a fluid flows inside.

  The case 31 includes a cylindrical side wall, a substantially disk-shaped top surface portion that is provided at one end of the side wall and covers the end, a cylindrical suction pipe 32 that sucks fluid into the pump chamber, and a pump chamber. The main body is formed by a circular discharge pipe 33 for discharging the fluid.

  The suction pipe 32 is provided substantially concentrically at the center of the top surface portion so as to protrude outside the case 31, and the discharge pipe 33 is provided so as to protrude from the side wall outside the case 31. The other side of the side wall that is not covered by the top surface is in contact with a separation plate 37 (details will be described later) with a seal member (not shown) such as an O-ring in between, and inside the side wall. An impeller 34 is arranged.

  The impeller 34 includes a disk-shaped shroud and a blade portion formed integrally with the plate surface of the shroud. The blade part is mainly composed of a plurality of blades arranged at substantially equal intervals in the circumferential direction of the shroud. .

  The shroud is disposed in the case 31 so as to be substantially concentric with the suction pipe 32. The shroud is arranged with a cylindrical shaft member 35 inserted substantially at the center of the circle, and the impeller 34 is rotatable about the axis of the shaft member 35. Therefore, the impeller 34 rotates about the shaft member 35 as a rotation center, thereby sucking fluid into the pump chamber via the suction pipe 32 and applying centrifugal force to the sucked fluid and discharging it from the discharge pipe 33 to the outside of the pump chamber. .

  One end portion of the shaft member 35 in the axial direction Ax is fixed to an attachment portion 36 provided in the case 31, the other end portion is fixed to the separation plate 37, the rotor 2 is attached to the peripheral surface, and the rotor 2 Is supported by the shaft member 35 so as to be rotatable around the shaft of the shaft member 35.

  The separation plate 37 is made of a resin material, and has a bottomed cylindrical portion 39 having a shaft member 35 fixed to the bottom portion 40, and a plate-like flange portion extending radially outward from an end portion on the opening side of the cylindrical portion 39. The main body is composed of 38. One plate surface of the flange portion 38 faces the ceiling portion, the impeller 34 is disposed between the plate surface and the ceiling portion, and the side wall abuts on the outer peripheral end of the flange portion 38.

  The cylindrical portion 39 has the rotor 2 and the shaft member 35 disposed substantially concentrically on the inner side, and the stator 6 disposed on the outer peripheral side. Furthermore, the control part 41 is arrange | positioned on the outer side of the bottom part 40, and the separating plate 37 partitions the space where the stator 6 and the control part 41 are arranged from the space where the rotor 2 is arranged. The portion (space) outside the separation plate 37 where the stator 6 and the control unit 41 are arranged is covered with the mold unit 42.

  The mold part 42 mainly includes a mold resin such as a thermosetting resin filled and cured in a part (space) where the stator 6 and the control part 41 are arranged, and forms an outer shell of the pump 30 in the part. The mold unit 42 fixes the stator 6 and the control unit 41 to the separation plate 37, improves the strength of the separation plate 37 against the pressure from the pump chamber, and reinforces the separation plate 37.

  The control unit 41 is mainly composed of electronic components (not shown) such as a position detection sensor for detecting the rotational position of the rotor 2 and a switching element for energization control of the stator 6 and a board on which the electronic components are mounted. The And the control part 41 receives the detection result of a position detection sensor, etc., controls the electric current etc. which flow through the coil 7, controls the rotational drive of the motor 43, and adjusts and controls the drive of the pump 30 (impeller 34). .

  The stator 6 includes a coil 7, a core 8, and an insulating member 43, and a conductive wire of the coil 7 is electrically connected to the control unit 41. The core 8 has a base portion 14 and an extension portion 16 at the magnetic pole portion 12. The extension 16 has magnetic pole surfaces 19 and 20 that are inclined in the circumferential direction.

  The insulating member 43 is mainly composed of a cylindrical tooth covering portion 44 that covers the side surface of the tooth 11 and a magnetic pole covering portion 45 provided at an end of the teeth covering portion 44 on the radially inward side of the motor 43. . The insulating member 43 is formed of an insulating resin and insulates the coil 7 and the core 8 from each other. The magnetic pole covering portion 45 covers the outer surface of the magnetic pole portion 12 except for the magnetic pole surface 13 and is in contact with the outer peripheral surface of the extension portion 16. The extension portion 16 is reinforced from the outer peripheral side and the magnetic pole portion 12 is hardly deformed. To do.

  As described above, the pump 30 uses the configuration of the motor 1 of the first embodiment as the drive source (the motor 43), and the separation plate 37 is located between the magnetic pole surface 13 and the circumferential surface 3 of the rotor 2 facing each other in the radial direction. And an impeller 34 is provided at one end in the axial direction Ax of the rotor 2.

  Therefore, it is easy to reduce the noise and vibration while suppressing the increase in size and cost of the drive source, and it is easy to secure the driving force of the pump 30. In addition, the stator 6 is fixed to the separation plate 37 by the mold portion 42 and the separation plate 37 is reinforced by the mold portion 42, so that the thickness of the cylindrical portion 39 can be easily reduced, and the air between the stator 6 and the rotor 2 can be reduced. It becomes easy to reduce the gap. Since the control unit 41 and the stator 6 that are energized when the pump 30 is driven and the like are isolated from the pump chamber by the separation plate 37 and covered with the mold unit 42, moisture such as external moisture and fluid in the pump chamber It becomes easy to suppress intrusion into the control unit 41 and the stator 6.

  Further, since the resin separation plate 37 is used, a draft angle for punching from the molding die may be formed in the cylindrical portion 39, and the pump 30 having the draft angle has the motor of the second embodiment. It is preferable to use the configuration of 1 as a drive source. The gradient of the rotor 2 and the radial gradient (gradient) of the extension portion 16 are preferably provided so as to be aligned substantially in parallel with the draft angle of the cylindrical portion 39. Of course, the separation plate 37 is not limited to resin, and may be made of metal, and the gradient formed in the cylindrical portion 39 is not limited to the draft.

  The pump 30 is not limited to the spiral pump as shown in FIG. 8, and may be a vortex pump, or is not limited to a centrifugal pump, but may be an axial pump or the like that causes fluid to flow in the axial direction Ax. Well, it is not limited to these exemplary configurations.

(Fourth embodiment)
The device 50 according to the fourth embodiment will be described below with reference to FIG. In addition, the substantially same structure or equivalent structure as the pump 30 of 3rd Embodiment attaches | subjects the same code | symbol, and the overlapping description is abbreviate | omitted.

  The device 50 according to the present embodiment is a dishwasher 51 that cleans the dishes 57 using, for example, warm water, water, or a liquid obtained by mixing a detergent with the warm water. The dishwasher 51 introduces the cleaning liquid in the storage tank 53 into the nozzle 55 by the cleaning pump 54, jets the cleaning liquid from the nozzle 55 into the arrangement space 52 for arranging the tableware 57, and the tableware 57 arranged in the arrangement space 52 is discharged. Wash. In the dishwasher 51, the storage tank 53 is positioned below the arrangement space 52, the cleaning liquid ejected into the arrangement space 52 is caused to flow into the storage tank 53, and the nozzle 55 is again ejected from the nozzle 55 into the arrangement space 52. Use repeatedly. Further, when the cleaning is completed, the cleaning pump 54 is stopped, the discharge pump 56 is driven, and the cleaning liquid in the storage tank 53 is discharged to the outside. Further, the pump 30 of the third embodiment is used for the above-described cleaning pump 54 and the discharge pump 56.

  As described above, the dishwasher 51 uses the pump 30 of the third embodiment for the washing pump 54 and the discharge pump 56, so that the washing pump 54 and the discharge pump 56 are inexpensive, low noise, low vibration, and high efficiency. It becomes easy to make it a simple structure. Therefore, it becomes easy to provide an inexpensive dishwasher 51 with low noise, low vibration and high efficiency.

(Fifth embodiment)
The device 50 according to the fifth embodiment will be described below with reference to FIG. In addition, the substantially same structure or equivalent structure as the pump 30 of 3rd Embodiment attaches | subjects the same code | symbol, and the overlapping description is abbreviate | omitted.

  The device 50 of this embodiment is a heat supply system 59. The heat supply system 59 includes a hot water storage unit 60 that stores water and hot water, a heat pump unit 61 that warms water, various output units 62 such as a bath, faucet, shower, and floor heater, various heat exchangers 63, and various valve devices. With. Furthermore, the heat supply system 59 includes a flow pump 64 such as water or hot water, and the flow pump 65 uses the pump 30 of the third embodiment. The heat supply system 59 drives a plurality of flow pumps 64 and controls various valve devices to supply water and hot water to various output units 62 at desired temperatures and flow rates. And output warm water or heat.

  As described above, since the heat supply system 59 uses the pump 30 of the third embodiment as the flow pump 64, the flow pump 64 can be easily configured with low cost, low noise, low vibration, and high efficiency. Therefore, it becomes easy to provide an inexpensive, low noise, low vibration, high efficiency heat supply system 59.

(Sixth embodiment)
The device 50 according to the sixth embodiment will be described below with reference to FIG. In addition, the substantially same structure or the same structure as the motor 1 of 1st or 2nd Embodiment and the pump 30 of 3rd Embodiment attaches | subjects the same code | symbol, and abbreviate | omits the description.

  The device 50 according to the present embodiment includes a washing tub 68 that houses a washing object such as clothes, a drive unit (not shown) that drives the washing tub 68 to rotate, and a water supply unit that supplies water into the washing tub 68 ( The washing machine 67 includes a circulation unit 69 that circulates the water in the washing tub 68. The washing machine 67 rotates and drives the washing tub 68 by the drive unit, and circulates the water in the washing tub 68 by the circulation unit 69 to wash the object to be washed.

  The drive unit uses a motor as a drive source, and uses the motor 1 of the first or second embodiment as the motor. And the circulation part 69 is provided with the pump 70 for circulation for circulating the water in the washing tub 68, and the pump 30 of 3rd Embodiment is used for the said pump 70 for circulation.

  As described above, the washing machine 67 uses the motor 1 according to the first or second embodiment as a drive source and uses the pump 30 according to the third embodiment as the circulation pump 70, so that the drive unit and the circulation unit are used. It becomes easy to make 69 an inexpensive, low noise, low vibration, high efficiency configuration. Therefore, it becomes easy to provide an inexpensive, low noise, low vibration, high efficiency washing machine 67.

  The device 50 is not limited to the device 50 of the fourth to sixth embodiments. For example, an automotive cooling device using the pump 30 of the third embodiment as a coolant circulation pump, a fuel cell device used as a flow pump for flowing fuel or air, or the like may be used. Moreover, for example, a device including the motor 1 of the first embodiment or the second embodiment but not including the pump 30 of the third embodiment may be used.

DESCRIPTION OF SYMBOLS 1 Motor 2 Rotor 3 Circumferential surface 6 Stator 8 Core 9 Plate-like body 12 Magnetic pole part 14 Base part 17 First extension part 18 Second extension part 13, 15, 19, 20 Magnetic pole face 30 Pump 50 Equipment Ax Axial direction

Claims (6)

A stator in which a core is formed by stacking a plurality of plate-like bodies, and a rotor that is rotationally driven by the stator,
The rotor has a circumferential surface along the direction of rotation;
The core includes a magnetic pole portion having a magnetic pole surface facing the peripheral surface;
The magnetic pole portion is provided with a base portion provided at an end portion of the core on the rotor side and a first end portion of the base portion extending in the axial direction in the axial direction of the rotation axis of the rotor. 1 extension part and a second extension part provided to extend in the axial direction from the other end of the base part in the axial direction,
A motor characterized in that at least one of the magnetic pole surfaces of the first extension portion and the second extension portion is inclined in the circumferential direction of the rotation axis. Inclining the magnetic pole surface of the first extension toward one of the circumferential directions;
The motor according to claim 1, wherein the magnetic pole surface of the second extension portion is inclined toward the other in the circumferential direction. The circumferential surface has a gradient in the axial direction;
The gradient is provided in the axial direction in parallel with the gradient of the peripheral surface on at least one of the magnetic pole surfaces of the first extension portion and the second extension portion. 2. The motor according to 2.   The motor according to claim 3, wherein the gradient is provided on each of the magnetic pole surface of the first extension portion and the magnetic pole surface of the second extension portion.   A pump comprising the motor according to claim 1.   An apparatus comprising the motor according to any one of claims 1 to 4 or the pump according to claim 5.

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