JP2013198218A - Stator of motor, mold motor, and air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stator of a motor, a mold motor, and an air conditioner capable of further improving quality.SOLUTION: A substrate fixing component 10 comprises: a substrate fixing section 11 with a guide-structure which is formed on a side facing a stator section and introduces a sensor substrate 20 from the axis center of a stator iron core to an outer peripheral side; and an axial direction presser 17 which is provided at the outer edge of the substrate fixing section 11 and brought into contact with the mounting surface 25 of the sensor substrate 20 so as to regulate the position of the sensor substrate 20 with respect to the axial direction of the stator section.

Description

  The present invention relates to an electric motor stator, a molded electric motor, and an air conditioner.

  In a conventional stator of an electric motor, it is disclosed that a sensor lead wire and a power supply lead wire are routed around an outer periphery of the stator core and are respectively routed to an anti-connection side and a connection side (for example, the following patent document) 1). Further, it is disclosed that a method of fixing a stator of a substrate fixing component and that a sensor substrate on which a lead wire is assembled is assembled to a substrate fixing component by a fixing claw (for example, Patent Document 2 below).

JP 2003-244880 A JP 2004-135439 A

  However, in the prior arts shown in Patent Documents 1 and 2 above, the sensor substrate is structured to be assembled to a substrate fixing component using elastic deformation of the fixing claw, so the strength of the fixing claw is weak, and the stator is molded. The sensor board loses the resin pressure when it is used, and the axial position of the sensor board (the axial position of the rotor shaft) cannot be regulated at a predetermined position, which meets the need for further improvement in quality. There was a problem that could not be done.

  This invention is made | formed in view of the above, Comprising: It aims at obtaining the stator of the electric motor which can aim at the further improvement of quality, a mold electric motor, and an air conditioner.

  In order to solve the above-described problems and achieve the object, the present invention includes a stator portion in which a stator iron core is wound via an insulating portion, a substrate on which a sensor having a position detection function is mounted, A stator of an electric motor comprising a board fixing component that is fixed to the insulating part on the side opposite to the stator part and that fixes the board, wherein the board fixing part faces the stator part Formed on the outer periphery of the stator core, and provided on the outer edge of the substrate mounting portion, and the substrate is mounted in the axial direction of the stator portion. An axial presser that abuts against the flat portion of the substrate so as to regulate the position is provided.

  According to the present invention, the axial presser for holding the sensor board in the axial direction and the foot part installed on the core part of the mold when molding the stator are provided on the fixed part of the sensor board. Therefore, there is an effect that the axial position of the sensor substrate is restricted to a predetermined position, and the quality can be further improved.

FIG. 1 is a perspective view showing a state before a sensor board is attached to a board fixing component of a molded electric motor according to an embodiment of the present invention. FIG. 2 is a perspective view showing a state after the sensor substrate is attached to the substrate fixing component. FIG. 3 is a perspective view before attaching each component constituting the stator of the molded motor. FIG. 4 is a perspective view after the components constituting the stator of the molded motor are attached. FIG. 5 is a configuration diagram of a molded electric motor incorporating the stator shown in FIGS. FIG. 6 is a configuration diagram of an air conditioner incorporating a molded electric motor.

  Embodiments of a motor stator, a molded motor, and an air conditioner according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment.
FIG. 1 is a perspective view showing a state before the sensor board 20 is attached to the board fixing component 10 of the mold motor 100 according to the embodiment of the present invention. FIG. FIG. 3 is a perspective view showing a state before attaching each component constituting the stator of the molded motor 100, and FIG. 4 is a diagram showing each component constituting the stator of the molded motor 100. It is a perspective view after attaching. FIG. 5 is a configuration diagram of the molded electric motor 100 including the stator shown in FIGS. 1 to 4, and FIG. 5 is a configuration diagram of the air conditioner including the molded electric motor 100.

  In FIG. 3, the stator of the molded motor 100 includes a stator portion 53 and a board fixing component 10. The stator portion 53 includes a stator core 50 in which electromagnetic steel plates are punched in a band shape and laminated in the axial direction of a rotor shaft (not shown) by caulking, welding, adhesion, and the like, and slots in the stator core 50. Insulating portion 54 provided on the insulating portion 54, and a winding 55 formed by winding a magnet wire around the insulating portion 54. On the outer periphery of the stator portion 53, a projection 62 is formed in the axial direction for the end surface 15 of the projection 14 provided on the foot portion 18 of the board fixing component 10 (FIG. 1) to contact. The insulating part 54 is formed by molding a thermoplastic resin such as PBT (polybutylene terephthalate) integrally with the stator core 50 or by assembling the stator part 53 after molding. One end of each phase of the magnet wire is joined to a terminal to which power is supplied from the outside by fusing or soldering, and the other end of the terminal is formed by combining all the phase terminals to form a neutral point. . In this way, a stator winding is formed. In the following description, the outer side of the end face of the stator core 50 in the axial direction, that is, the side including the terminal 52 is referred to as a connection side, and the opposite side is referred to as an anti-connection side.

  In the insulating part 54 on the side opposite to the connection shown in FIG. 3, two columnar (for example, octagonal) mounting pins 51 for mounting the board fixing component 10 to the stator 53 are provided. A power supply lead wire 45 for supplying power to the winding 55 passes through the outer peripheral portion of the stator core 50 from the terminal 52 of each phase, and the lead portion 60 (see FIG. It is routed until 4). The power supply lead arrangement component 42 is attached to the stator core 50 by the two attachment legs 41 provided above the power supply lead arrangement component 42 so that the end surface of the stator core 50 is attached to both sides of the insulating portion 54 on the anti-connection side. The stator core 50 is assembled by being fitted into the side surface in the slot. The power supply lead 45 is provided in a state of being held on the outer peripheral portion of the stator core 50 by the power supply lead arrangement component 42.

  In FIG. 1, the sensor substrate 20 formed in a rectangular plate shape includes an introduction surface 23 formed on the long side portion of the sensor substrate 20, a side surface 21 formed on the short side portion of the sensor substrate 20, and an introduction surface. 23, a chamfered portion 22 formed at a corner between the side surface 21 and the side surface 21, a mounting surface 25 such as an electronic component (for example, a position detection circuit) such as a Hall IC 24, and an anti-mounting surface 26. The pair of chamfered portions 22 provided on the sensor substrate 20 are arranged at symmetrical positions with the center line 28 of the sensor substrate 20 in between, and the angle formed by the centerline 28 and the chamfered portion 22 is the same angle. It is formed as follows.

  The board fixing component 10 includes a board mounting portion 11 formed in a square shape at the center of the board fixing component 10, a foot 18 attached to the insulating portion 54 on the anti-connection side, and a mounting pin 51 formed on the foot 18. Mounting holes 13, projections 14 for positioning the axial direction with respect to the stator core 50 outside the foot 18, and the foot 16. Since the board fixing component 10 includes the mounting hole 13, when the mounting hole 13 is fitted to the mounting pin 51, the positional deviation in the rotation direction is prevented and the shift of the sensor signal is suppressed, so that the quality is improved. Can be achieved. Further, the end 15 of the protrusion 14 provided on the outer side of the foot 18 is installed on the end surface 62 a of the protrusion 62 provided on the outer peripheral portion of the stator core 50, so that the axial direction of the board fixing component 10 is increased. Positioning is done. As a result, the positional deviation in the axial direction of the board fixing component 10 is suppressed, and the quality can be improved.

  The foot portion 16 is formed in a rectangular shape in which the length in the sliding direction of the sensor substrate 20 is longer than the length in the axial direction, and is provided in the vicinity of the axial presser 17 at the short side portion of the substrate mounting portion 11. Is molded so as to stand on the stator core 50 side so as to be installed on a mold core part extending from the inner peripheral surface 63 (FIG. 3) on the shaft center side. Since the foot portion 16 holds the axial position of the substrate fixing component 10 in the mold resin, the sensor substrate 20 can be prevented from being displaced in the axial direction by the resin pressure when the stator is molded. Further, since the foot portion 16 is formed to have a length in the axial direction shorter than a length in the sliding direction of the sensor substrate 20, it is possible to ensure sufficient strength in the axial direction. As a result, the axial position of the sensor substrate 20 at the time of molding the stator is restricted to a predetermined position, and quality can be improved.

  The substrate mounting portion 11 includes a lattice-like lattice surface 11a provided at a position facing the counter-mounting surface 26 of the sensor substrate 20, a side surface 11b provided at a position facing the side surface 21 of the sensor substrate 20, and the sensor substrate. It has a pair of chamfered portion abutting surfaces 11c with which the 20 chamfered portions 22 abut, and two pairs of axial pressers 17. The chamfered portion abutting surface 11 c is formed such that the angle formed by the center line 28 of the sensor substrate 20 and the chamfered portion abutting surface 11 c is the same angle as the chamfered portion 22.

  Of the four axial retainers 17, the two axial retainers 17 provided in the vicinity of the end surface of the substrate fixing component 10 on the axial center side (center side of the stator portion 53) are sensors introduced into the substrate mounting portion 11. In order to hold the mounting surface 25 of the substrate 20, it is formed in a rectangular flat plate shape extending in the opposing direction (center side of the lattice surface 11 a) from the vicinity of the base portion of the foot portion 16 provided on the substrate fixing component 10. Of the four axial retainers 17, the two axial retainers 17 provided on the side facing the introduction surface 23 of the sensor substrate 20 have the mounting surface 25 of the sensor substrate 20 introduced into the substrate mounting portion 11. It is formed in a rectangular flat plate shape extending in the direction of the sensor substrate 20 from the vicinity of the lattice surface 11a so as to be held. Since the mounting surface 25 of the sensor substrate 20 introduced into the substrate mounting portion 11 is held by the surface of the axial retainer 17 on the lattice surface 11a side, it is possible to prevent the displacement of the sensor substrate 20 in the axial direction.

  The axial retainer 17 prevents the sensor substrate 20 from being displaced in the axial direction when the stator is molded, and the sensor substrate 20 can be slid and attached. Therefore, the axial retainer 17 does not require elastic deformation such as the structure employed in Patent Document 2 (the structure in which the sensor substrate is assembled to the board fixing component by utilizing the elastic deformation of the fixing claw). No. 17 can ensure sufficient strength and can improve quality.

  The direction in which the sensor substrate 20 is incorporated into the substrate fixing component 10 will be described. When the substrate fixing component 10 is installed on the stator portion 53, the sensor substrate 20 is arranged such that the non-mounting surface 26 faces the substrate fixing component 10 and the side surface 21 is along the side surface 11b of the substrate mounting portion 11. It is introduced from the introduction surface 23 toward the board fixing component 10. The sensor substrate 20 is introduced until the chamfered portion 22 of the sensor substrate 20 comes into contact with the chamfered portion contact surface 11c of the substrate mounting portion 11. FIG. 2 shows a state after the sensor substrate 20 is introduced into the substrate fixing component 10. When the sensor substrate 20 is introduced into the substrate fixing component 10, the sensor substrate 20 is held by the axial retainer 17 and the position of the sensor substrate 20 in the axial direction is restricted.

  Thereafter, the terminal 32 of the board-in connector 30 assembled to the end of the sensor lead wire 33 is introduced into the joint portion 27 of the sensor substrate 20. Then, the terminal 32 exposed to the mounting surface 25 of the sensor substrate 20 is soldered and joined to the sensor substrate 20. When the sensor board 20 and the board-in type connector 30 are joined, a gap is formed between the lattice plane 11a and the housing 31 of the board-in type connector 30, so that the sensor board 20 moves by this gap. However, the sensor substrate 20 does not fall from the substrate fixing component 10 due to this bonding.

  Further, after the terminal 32 of the board-in connector 30 is coupled to the joint portion 27 of the sensor substrate 20, the chamfered portion 22 of the sensor substrate 20 is bonded in a state of being in contact with the chamfered portion contact surface 11 c of the substrate fixing component 10. The agent is applied. This is for restricting the movement of the sensor substrate 20 in the radial direction and assembling the sensor substrate 20 at a predetermined position, whereby the sensor substrate 20 is fixed to the substrate fixing component 10. Further, by positioning the chamfered portion 22 of the sensor substrate 20 and the chamfered portion abutting surface 11c of the substrate fixing component 10 in contact with each other, the center of the sensor substrate 20 is aligned with the center of the substrate fixing component 10, and the sensor The substrate 20 is positioned and fixed with high accuracy with respect to the substrate fixing component 10, and the positional accuracy of the sensor substrate 20 is improved.

  The method of positioning the chamfered portion 22 of the sensor substrate 20 and the chamfered portion abutting surface 11c of the substrate fixing component 10 by contacting the chamfered portion 22 is a motor using the substrate fixing component 10 that fixes the sensor substrate 20. The present invention can be applied to other than the stator of the molded electric motor 100 of the present embodiment. In the present embodiment, the sensor substrate 20 having the chamfered portion 22 is used. However, by improving the fitting accuracy between the sensor substrate 20 and the substrate fixing component 10, the sensor substrate having no chamfered portion 22 is used. 20 can also be used.

  In FIG. 3, the power supply lead arrangement component 42 is formed in a bow shape along the outer periphery of the stator core 50, a portion for collecting the power supply lead wires 45, a lead wire housing 43 branched to each terminal of each phase, And a connecting portion formed at the tip. The tip of the power supply lead wire 45 is stripped to form a core wire, and the covering portion is fitted and fixed in a groove of the lead wire housing 43 branched into each phase of the power supply lead placement component 42. Further, the core wire is twisted and is entangled from the lead wire housing 43 to the winding protrusion 44 provided at the front end of the housing wall, starting from the housing end face of the power lead arrangement component 42. Note that the crossover width of the core wire is more than the width of the electrode of the welding machine that spot welds the terminal 52. The power lead wires 45 of each phase are drawn from the lead wire housing 43 to the main body, further drawn to the lead-out portion 60, and sandwiched and fixed by the power lead fixing tool 46.

  When the power supply lead arrangement component 42 is attached to the stator winding, the two attachment legs 41 provided in the lead-out portion 60 of the power supply lead wire 45 are fixed to the stator core 50 on both sides of the outer peripheral side insulating portion 54 on the anti-connection side. The stator core 50 is assembled by being fitted into the side surface in the slot. When the power supply lead arrangement component 42 is assembled to the stator winding, the core wire of the power supply lead wire 45 is assembled so as to be positioned in the vicinity of each phase terminal 52 inside the outer diameter of the stator core 50. Furthermore, the lead wire housing 43 facing the side surface of the insulating portion 54 on the side opposite to the connection side of the power lead arrangement component 42 has a round hook shape, and is not damaged even if it contacts the crossover of the winding 55. have.

  After assembling the power supply lead arrangement component 42 to the stator winding, the mounting holes 51 formed in the board fixing component 10 are introduced with mounting pins 51 (two on one side) provided in the insulating portion 54 on the opposite side. The installation surface of the projection formed on the mounting foot 41 is installed on the projection provided on the outer periphery of the stator winding. Then, as shown in FIG. 4, four mounting pins 51 exposed from the board fixing component 10 are welded and assembled to the stator winding. As a result, it is possible to prevent displacement of the substrate fixing component 10 in the rotation direction, suppress the displacement of the sensor signal, and improve the quality.

  Further, when the board fixing component 10 is assembled to the stator windings, the mounting legs 41 of the power supply lead arrangement components 42 assembled to the stator core 50 portions on both sides of the outer peripheral insulating portion 54 on the anti-connection side. As the power supply lead fixture 46 is pressed in the axial direction, the power supply lead arrangement component 42 is assembled without being detached from the stator winding. Thereafter, the sensor lead wire 33 is drawn to the lead portion 60, and the sensor lead wire 33 is sandwiched and fixed by the sensor lead fixture 40 at the lead portion 60. At this time, the power supply lead arrangement component 42 is also positioned in the axial direction, so that productivity can be improved and cost can be reduced accordingly.

  Finally, the core wire of the power supply lead wire 45 and the terminal 52 formed on the stator winding are joined by spot welding to form a stator. As described above, the power supply lead fixture 46 is assembled to the stator winding. Therefore, the core wire of the power supply lead wire 45 is also positioned with respect to the terminal, so that it is possible to improve productivity and quality accompanying the welding of the terminal 52.

  Further, as shown in FIG. 5, the stator is molded with a thermosetting resin to become a mold stator 80, but the mold holder is placed on the side of the substrate fixing component 10 where the sensor substrate 20 is not disposed. Since the pins are provided, when the mold is formed, the mold mold holds the mold holding pins of the board fixing component 10, thereby preventing the position deviation of the sensor substrate 20 and suppressing the deviation of the sensor signal. Therefore, it is possible to improve the quality.

  Further, in the present embodiment, the power supply lead wire 45 and the sensor lead wire 33 are divided into two hands at the lead-out portion 60. However, as long as the holding method of the sensor substrate 20 is the same, the present embodiment is not concerned. The form is applicable. Moreover, although the mold electric motor 100 is obtained by assembling the mold stator 80, the rotor 82, and other parts with the bracket 81, according to the present embodiment, the productivity is good and the quality associated therewith is good. In addition, it is possible to obtain the molded electric motor 100 capable of reducing the cost.

  FIG. 6 shows an air conditioner incorporating a molded electric motor 100 according to an embodiment of the present invention, and the air conditioner includes an indoor unit 200 and an outdoor unit 300 connected to the indoor unit 200. The indoor unit 200 and the outdoor unit 300 are provided with a molded motor 100 as a drive source for the blower. As described above, the quality of the air conditioner can be improved by using the low-cost and high-quality molded motor 100 as a blower motor that is a main part of the air conditioner.

  In the present embodiment, the foot portion 16 is formed such that the length of the sensor substrate 20 in the sliding direction is longer than the length in the axial direction, but is not limited to such a shape. Any shape that can regulate the position of the substrate fixing component 10 in the axial direction when it is installed in the mold core part. In the present embodiment, four axial retainers 17 are used. However, the shape and quantity of the axial retainers 17 are not limited to these, and the sensor substrate 20 is centered on the axis of the stator core 50. The guide structure may be such that it can be introduced from the outer periphery to the outer peripheral side and the axial position of the sensor substrate 20 can be regulated. Further, in the present embodiment, the square sensor substrate 20 is used, but the shape of the sensor substrate 20 is not limited to the square shape.

  As described above, the stator of the electric motor according to the embodiment of the present invention includes the stator portion 53 in which the stator core 50 is provided with the winding 55 via the insulating portion 54 and the sensor having a position detection function. And a board fixing component 10 that is fixed to the insulating part 54 on the side opposite to the stator part 53 and that fixes the sensor board 20. The board fixing component 10 is formed on the side facing the stator part 53, and has a guide structure board mounting part 11 for introducing the sensor board 20 from the axial center of the stator core 50 to the outer peripheral side, and an outer edge of the board mounting part 11. And an axial retainer 17 that abuts against the flat surface portion (mounting surface 25) of the sensor substrate 20 so as to regulate the position of the sensor substrate 20 with respect to the axial direction of the stator portion 53. Using elastic deformation Structure such as mounting the sensor substrate 20 to the substrate fixing part 10 is not necessary. Accordingly, the sensor substrate 20 can be slid and attached, and the strength of the axial retainer 17 can be secured, so that the sensor substrate 20 is prevented from being displaced in the axial direction when the stator is molded. . As a result, assembly of the sensor substrate 20 is facilitated, and both improvement in the quality of the stator and cost reduction can be achieved.

  In addition, since the sensor lead wire 33 is connected to the sensor substrate 20 attached to the substrate attachment portion 11 according to the embodiment of the present invention from the side opposite to the stator portion of the substrate fixing component 10, Even when there is a gap between the lattice surface 11 a of the portion 11 and the housing 31 of the board-in connector 30, the sensor substrate 20 is prevented from falling onto the substrate fixing component 10.

  In addition, the board fixing component 10 according to the embodiment of the present invention is disposed on the axial center side of the inner peripheral surface 63 of the stator portion 53 on the side facing the stator portion 53, and on the stator core 50 side. Since the leg portion 16 is provided so as to stand toward the end, the tip end of the foot portion 16 abuts on the die core portion extending from the inner peripheral surface 63 on the axial center side when the stator is molded, and the board fixing component Ten axial positions are regulated. Therefore, it is possible to prevent displacement of the sensor substrate 20 in the axial direction due to the resin pressure when the stator is molded.

  In addition, the foot portion 16 according to the embodiment of the present invention is formed in a rectangular shape in which the length in the introduction direction of the sensor substrate 20 is longer than the length in the axial direction, so that sufficient strength in the axial direction is ensured. It is possible.

  Further, the axial presser 17 according to the embodiment of the present invention is a pair that holds the side surface 21 side of the sensor substrate 20 that is extended from the vicinity of the base portion of the foot portion 16 in the opposing direction and introduced into the substrate mounting portion 11. Support member (axial retainer 17 provided on the axial center side of the substrate fixing component 10) and introduction of the sensor substrate 20 introduced into the substrate attachment portion 11 provided at a position facing the introduction surface 23 of the sensor substrate 20 Since a pair of supporting materials (the axial presser 17 provided on the side facing the introduction surface 23 of the sensor substrate 20) are provided to hold the surface 23 side, the positional deviation in the axial direction of the sensor substrate 20 is prevented. Is possible.

  Note that the stator of the electric motor, the molded electric motor, and the air conditioner according to the embodiment of the present invention show an example of the contents of the present invention, and can be combined with another known technique. However, it is needless to say that modifications can be made such as omitting a part without departing from the gist of the present invention.

  As described above, the present invention is applicable to a stator of an electric motor, a molded electric motor, and an air conditioner, and is particularly useful as an invention capable of further improving quality.

DESCRIPTION OF SYMBOLS 10 Board | substrate fixing | fixed part 11 Board | substrate attachment part 11a Lattice surface 11b Side surface 11c Chamfering part contact surface 13 Mounting hole 14 Protrusion 15 End surface 16 Foot part 17 Axial clamp 18 Foot 19 Mold holding pin 20 Sensor board (board)
21 Side 22 Chamfer 23 Introduction surface 24 Hall IC
25 Mounting surface 26 Non-mounting surface 27 Joint 30 Board-in connector 31 Housing 32 Terminal 33 Sensor lead wire (sensor lead)
40 Sensor Lead Fixture 41 Mounting Feet 42 Power Lead Arranged Parts 43 Lead Wire Housing 44 Winding Projection 45 Power Lead Wire 46 Power Lead Fixing Tool 50 Stator Core 51 Mounting Pin 52 Terminal 53 Stator 60 Outlet 62 Projection 62a End surface 63 Inner peripheral surface 80 Mold stator 81 Bracket 82 Rotor 100 Mold electric motor 200 Indoor unit 300 Outdoor unit

Claims (7)

A stator portion wound with a stator core through an insulating portion; a substrate on which a sensor having a position detecting function is mounted; and the substrate fixed to the insulating portion on the side opposite to the stator portion. A motor stator having a board fixing part for fixing
The board fixing component is
A board mounting portion having a guide structure formed on a side facing the stator portion and introducing the substrate from the axial center of the stator core to the outer peripheral side;
An axial retainer provided at an outer edge of the substrate mounting portion and abutting against a planar portion of the substrate so as to regulate the position of the substrate with respect to the axial direction of the stator portion;
An electric motor stator characterized by comprising:   The stator of the electric motor according to claim 1, wherein a sensor lead is connected to the board attached to the board attaching part from an anti-stator part side of the board fixing component. The board fixing component is
It is provided with the leg part which is arrange | positioned in the axial center side rather than the inner peripheral surface of the said stator part on the side facing the said stator part, and stands up toward the said stator core side. Item 3. The electric motor stator according to Item 1 or 2.   The stator of the electric motor according to claim 3, wherein the foot is formed in a square shape whose length in the introduction direction of the substrate is longer than the length in the axial direction. The axial presser is
A pair of supporting members that extend in directions facing each other from near the base portion of the foot portion and hold the side surface side of the substrate introduced into the substrate mounting portion;
A pair of support members provided at positions facing the introduction surface of the substrate and holding the introduction surface side of the substrate introduced into the substrate attachment portion;
The stator for an electric motor according to any one of claims 1 to 4, further comprising:   A molded electric motor using the stator of the electric motor according to any one of claims 1 to 5.   An air conditioner comprising the molded motor according to claim 6 mounted on a blower.

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