JP2011151875A - Stator of synchronous rotating machine - Google Patents

Abstract

An object of the present invention is to reliably and inexpensively realize electrical connection between windings wound around each iron core in a stator of a synchronous rotating machine composed of divided iron cores.
A printed wiring board 1 mounted on an insulating insulator 7 connects each winding 8 to each other, and each winding 8 and a power supply lead 9 held on the printed wiring board 1 are connected to each other. A connection pattern 5 to be connected is formed. A V-shaped notch 2 for sandwiching the winding terminal 4 of the winding 8 is formed on the outer peripheral portion of the printed wiring board 1. Soldering lands 3 are provided around both sides of the V-shaped notch 2, and each winding terminal 4 is pressed in the inner diameter direction of the V-shaped notch 2 to sandwich the winding terminal 4. It will be ready for soldering.
[Selection] Figure 1

Description

  The present invention relates to a stator of a synchronous rotating machine such as a synchronous motor or a synchronous generator constituted by a split iron core.

  Conventionally, the stator of this type of synchronous rotating machine is known to connect each winding with a printed wiring board after combining the divided cores wound with the winding, as in the present invention. Yes. (For example, refer to Patent Document 1).

  Similarly, a wiring board composed of a conductive metal plate and an insulating member is known. (For example, refer to Patent Document 2).

  Hereinafter, the configuration of this type of stator described in Patent Document 1 will be described with reference to FIGS. 9 and 10.

  As shown in the figure, a stator composed of a split iron core 101 is formed on the outer diameter side of a rotor 109, and a winding frame 103 that forms an insulating layer is attached to the split iron core 101, and then winding is performed. 102 is wound. The winding terminals of the respective windings 102 are electrically connected to each other by a printed wiring board 105 attached to one end portion in the axial direction of the stator. A mounting hole 106 is provided in the printed wiring board 105, and a hook 104 provided at an end in the axial direction of the winding frame 103 is engaged with the mounting hole 106 so that the printed wiring board 105 is held by the stator. Has been. The winding terminal of each winding 102 is led to the vicinity of the pattern pad 108 of the printed wiring board along the L-shaped guide groove 107 provided on the outer peripheral portion of the printed wiring board 105 and then soldered. 102 are electrically connected to each other and to an electronic circuit component for driving a motor and a motor lead wire 110 mounted on the printed wiring board 105. Each of the divided cores 101 and the rotor 109 is held by a metal casing 111 so that the rotor 109 can rotate freely.

  The stator shown in FIGS. 11 and 12 described in Patent Document 2 is not a split core, but a stator 113 is formed on the outer diameter side of the rotor 112 as in the example of Patent Document 1. For the electrical connection of the stator windings, a wiring board 114 formed of a metal conductive pattern 116 and an insulating member 115 is used. The end of the winding is passed through a through hole 117 provided in the conductive pattern 116 and is electrically connected by soldering.

JP-A-2005-245140 Japanese Patent Application Laid-Open No. 08-70559

  In the conventional stator shown in FIGS. 9 and 10 described in Patent Document 1, each winding terminal is guided to the vicinity of the pattern pad 108 by being guided by the L-shaped guide groove 107. However, since each winding terminal is not fixed at that part, the winding terminal moves when soldering to the pattern pad, and it is difficult to perform soldering work to the pattern pad, and the reliability of solder connection may be reduced. was there. Furthermore, electronic circuit components for driving are mounted on the printed wiring board, and the width of the printed pattern for energization is narrowed to secure an insulation distance, so that a large current does not flow and the motor output is limited. There was a problem.

  In the example of FIG. 11 and FIG. 12 described in Patent Document 2, since the electrical connection is made by using the metal conductive pattern 116, the motor output is limited as in Patent Document 1. Although there is no particular problem, it is necessary to solder the winding terminal through the through-hole 117 provided in the conductive pattern 116, and there is a problem that the operation is difficult.

  The present invention solves such a conventional problem, and has a structure in which a winding terminal wound around each divided iron core is sandwiched by V-shaped grooves provided on the outer periphery or inner periphery of the wiring board. Accordingly, it is an object of the present invention to realize a high-quality stator in which each winding terminal can be easily connected and the winding terminal is surely electrically connected to the solder land portion of the wiring board. When the power supply voltage of the motor is high, connect each phase winding with a printed wiring board or conductive plate, and when the voltage is low, connect each phase winding in parallel with a printed wiring board or conductive plate. The purpose of the present invention is to realize a stator that can be easily coped with by changing the configuration of the stator and the winding equipment by changing the power supply voltage by connecting with a plate.

  In order to achieve the above object, the stator of the synchronous rotating machine according to the present invention is provided with an insulating insulator, and a plurality of divided iron cores to be combined after winding the winding and soldering ends of the winding. A stator of a synchronous rotating machine composed of printed wiring boards connected to each other, wherein the printed wiring board is a donut-shaped disk and is mounted in the direction of the rotation axis of the insulating insulator, and further, on the inner diameter side or outside A V-shaped notch is formed on the radial side, a soldering land is formed along the V-shaped notch, and the ends of the windings are sandwiched between the V-shaped notches. At the same time, it is electrically connected to the land portion by solder and the windings are connected to each other.

  By this means, the winding terminal is clamped by the V-shaped notch, and the land for soldering is formed along the notch. Therefore, the clamped winding is bent at that part and soldered. As a result, the electrical connection of the winding terminals can be performed easily and reliably, and an inexpensive and high-quality split core stator can be realized.

  According to the present invention, a V-shaped notch is provided on the inner diameter side or the outer diameter side of the printed wiring board mounted on the insulating insulator of the split iron core, and the winding of each split iron core at the V-shaped notch portion. Since the winding lands are sandwiched and the soldering lands are provided along the V-shaped notches, each winding terminal can always be securely held at a solderable position. In addition, since the notch is V-shaped, it can be held at a solderable position even if the winding diameter changes, so the reliability of the electrical connection by soldering is very high, and a high-quality synchronous rotating machine It becomes possible to provide a stator.

The top view of the printed wiring board of the 1st Embodiment of this invention, and its partial enlarged view Three-sided view with insulator and winding installed on the same core Front view of a state in which the divided iron cores are combined and a printed wiring board is mounted on an insulator for insulation. Sectional drawing which shows the stator of the 2nd Embodiment of this invention The top view of the state which mounted | wore the insulator for insulation with the conductive metal plate and conductive metal plate of the 3rd Embodiment of this invention Front view of the same conductive metal plate mounted on an insulator for insulation Explanatory drawing which shows the connection state of each coil | winding of the 4th Embodiment of this invention Explanatory drawing which shows the connection state of each winding in the case of the same 10 pole rotor Cross section of a rotating machine incorporating a conventional stator core A plan view of the printed circuit board and a perspective view showing a stator core Sectional view of a rotating machine incorporating other stator cores Plan view of conductive metal plate of other stator core

  The invention according to claim 1 of the present invention comprises a plurality of divided cores that are combined with an insulating insulator, wound after winding, and a printed wiring board that is soldered and connected to the ends of the windings. The printed wiring board is a donut-shaped disk that is mounted in the direction of the axis of rotation of the insulator for insulation, and has a V-shaped cut on the inner diameter side or outer diameter side. In addition to forming a notch, a land portion for soldering is formed along the V-shaped notch, and ends of the windings are sandwiched by the V-shaped notch, and the land portion and the solder are connected to each other. The windings are electrically connected to each other, and the windings can be connected to each other. Each winding terminal can be easily and securely held by the soldering portion, thereby improving the reliability of soldering. It becomes possible.

  Further, the divided iron core with the printed wiring board mounted thereon is used as a stator of a synchronous rotating machine integrally sealed with a mold resin. As a result, the heat generated in the pattern part of the printed wiring board due to energization is dissipated to the mold resin, so that a large current can flow through the pattern part, and even if the printed wiring board is used, high output synchronization A stator of a rotating machine can be realized. In addition, the insulating function of the mold resin makes it possible to reduce the dimension between the printed wiring board and the windings, thereby realizing a thin synchronous rotating machine stator.

  The printed wiring board is a stator of a sensorless drive motor that does not include electronic components such as a magnetic sensor and a driving circuit. The printed wiring board is provided only with a pattern that realizes electrical connection between the windings. As a result, a large current can be flowed by increasing the area of the pattern portion, and a stator of a synchronous rotator with high output can be realized. If the output is not increased, the area of the pattern part can be reduced, the size of the printed wiring board itself can be reduced, and the connection pattern between the windings can be freely changed. Therefore, it is possible to realize a stator for a highly versatile synchronous rotating machine corresponding to many winding connection methods at a lower cost.

  Also, prepare a printed wiring board that connects each winding in parallel for each phase and a printed wiring board that connects each winding in series for each phase, and connect them in parallel if the power supply voltage supplied to the stator is low When the power supply voltage is high, a printed wiring board connected in series is used. By using a printed wiring board that connects each phase winding in parallel when the power supply voltage is low, and by using a printed wiring board that connects each phase winding in series when the power supply voltage is high, Even if the power supply voltage changes, there is no need to greatly change the winding diameter and the number of turns of each divided core, and a stator for a synchronous rotating machine with high versatility with respect to the power supply voltage can be realized. At the same time, it is possible to standardize the winding manufacturing equipment, and a highly versatile synchronous rotating machine stator can be realized at low cost.

  In addition, the number of divided iron cores is set to 12, and a three-phase, 12-slot stator is prepared. A printed wiring board or a conductive metal plate for rotors with 8 and 10 poles is prepared. The stator is a brushless DC motor which is connected to each winding according to the usage. For example, when the inverter energization switching frequency is to be lowered, an 8-pole brushless motor is used to reduce the cogging torque. If desired, a 10-pole brushless motor can be realized without changing the winding method of each divided core, and a stator of a brushless DC motor having high flexibility in motor performance can be realized.

  In addition, the stator is mounted on a brushless DC fan motor for air conditioning, and it is necessary to cope with a large number of power supply voltages, and it is highly necessary to share equipment due to the demand for cost reduction. Ideal as a stator.

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

(Embodiment 1)
FIG. 1 is a plan view of a printed wiring board and a partially enlarged view thereof according to the first embodiment of the present invention. Fig. 2 is a three-sided view of the insulation core and windings mounted on the same split core. Fig. 3 shows the insulation core and insulation after the insulation core and windings are installed on the same split core. It is a front view of a state where a printed wiring board is mounted on an insulator and each winding terminal is held between the printed wiring boards.

  A split iron core 6 that is combined to form a stator is provided with an insulating insulator 7 and a winding 8. Reference numeral 1 denotes a printed wiring board mounted on the insulating insulator 7. The printed wiring board 1 is formed with a connection pattern 5 for connecting the windings 8 to each other and connecting the windings 8 to the power supply lead wires 9 held on the printed wiring board 1. A V-shaped notch 2 for sandwiching the winding terminal 4 of the winding 8 is formed on the outer peripheral portion of the printed wiring board 1. Soldering lands 3 are provided around both sides of the V-shaped notch 2, and each winding terminal 4 is pressed in the inner diameter direction of the V-shaped notch 2 to sandwich the winding terminal 4. Further, when the winding terminal 4 is bent into one of the V-shaped cutouts 2, the winding terminal 4 comes into contact with the land 3 and can be easily soldered.

  According to such a configuration, a soldering operation is easy and a highly reliable electrical connection can be realized. Furthermore, since the V-shaped notch 2 is V-shaped, it is possible to hold the winding terminal 4 even if the diameter of the winding 8 changes, and it can be used for various winding specifications. A high stator can be manufactured.

(Embodiment 2)
FIG. 4 is a cross-sectional view of the stator of the synchronous rotating machine according to the second embodiment of the present invention, in which the stator according to the first embodiment of the present invention is integrated with a mold resin 10. .

  In this embodiment, when the mold resin 10 is also integrated around the printed wiring board 1 and a current flows through the connection pattern 5 to generate heat, the heat is absorbed and dissipated around the motor, so the temperature rise of the connection pattern 5 is reduced. It becomes possible to make it. Thereby, a large current can be passed through the connection pattern 5, and a stator with a large output can be realized even when the printed wiring board 1 is difficult to increase the thickness of the energization pattern 5.

(Embodiment 3)
FIG. 5: is a top view of the electrically conductive metal plate of the stator of the synchronous rotating machine in the 3rd Embodiment of this invention, and the state with the state mounted | worn with the insulation insulator 7 of the state which united each said split iron core 6 It is. In this embodiment, an example is shown in which three-phase 12-slot stators are connected in parallel to each other and star-connected. In the figure, reference numerals 11a, 11b, 11c, and 11d denote conductive metal plates. The conductive metal plate 11a is used to connect the U-phase windings, the conductive metal plate 11b is used to connect the V-phase windings, the conductive metal plate 11c is used to connect the W-phase windings, and the conductive metal plate 11d is a neutral point. Is for connection. The conductive metal plates 11a, 11b, and 11c have substantially the same shape, and V-shaped notches 12 are formed at four locations on the outer peripheral side. As in the first embodiment, the winding terminal 4 is sandwiched by the V-shaped notch 12, but the conductive metal plates 11a, 11b, and 11c are made of metal. The clamping force can be further increased. The conductive metal plate 11d has a donut shape, and a V-shaped notch 12 is formed on the inner diameter side. Similarly, each winding terminal 4 can be firmly held. In addition, the conductive metal plates 11a, 11b, and 11c of each phase are arranged on the protrusions 14 formed with three kinds of diameters provided on the insulator 13 for insulation, and are spaced from each other, as shown in FIG. Thus, they are held in the order of 11a, 11b, and 11c from the bottom. As in the second embodiment, the conductive metal plates 11a, 11b, and 11c are integrally sealed with the mold resin 10 so that the conductive metal plates 11a, 11b, and 11c are specially insulated. Without application, insulation can be ensured, and winding connection can be realized at low cost. Further, unlike the connection pattern of the printed wiring board, the conductive metal plates 11a, 11b, and 11c can be easily increased in thickness and can flow a large current without having a wide shape. Yes, a higher output stator can be realized.

  The drawing in the state sealed with the mold resin is the same as that of the second embodiment, and is omitted here.

(Embodiment 4)
FIGS. 7 and 8 are explanatory diagrams illustrating the connection state of each winding of the stator of the synchronous rotating machine according to the fourth embodiment of the present invention, showing the connection state of the stator of the three-phase 12-slot. Yes. FIG. 7 is a connection diagram in parallel and series when the number of poles of the rotor is 8, and FIG. 8 is a connection diagram in parallel and series when the number of poles of the rotor is 10. In the figure, the connection pattern of the printed wiring board 1 used in the first embodiment and the shape of the conductive metal plates 11a, 11b, 11c used in the second embodiment are changed, and the phase windings are connected in parallel. Realizing both parallel connection and series connection without changing the winding direction of the winding 8 wound around each divided core 6 by preparing each phase winding in series. Is possible. Thereby, according to the power supply voltage supplied to the stator, it is possible to adopt a parallel connection at a low voltage and a series connection at a high voltage without a major change in the winding machine equipment, etc. A stator that can respond to changes in power supply voltage at low cost can be realized. Further, FIG. 8 shows the connection in a state corresponding to the case where the rotor has 10 poles by changing the connection between the windings in the parallel and series connection states. Also in this case, by preparing the connection pattern of the printed wiring board 1 used in the first embodiment for 10 poles and the shape of the conductive metal plates 11a, 11b, and 11c used in the second embodiment, A 10-pole stator can be realized without changing the winding direction. As a result, an 8-pole brushless motor can be used when the inverter energization switching frequency is lowered, and a 10-pole brushless motor can be used when the cogging torque is reduced. Therefore, a brushless DC motor stator having high flexibility in motor performance can be realized at low cost.

  As described above, the stator of the synchronous rotating machine according to the present invention forms a V-shaped notch on the inner diameter side or the outer diameter side, and forms a soldering land along the V-shaped notch. The printed wiring board is mounted on an insulator for insulation, and the winding ends of each winding are clamped by V-shaped notches, and each winding end and the land are electrically connected by soldering, and the windings are mutually connected. Since the high-quality stator that can be securely connected by soldering can be realized at low cost, it is ideal as a rotor for a brushless DC fan motor for air conditioning that has high quality and low demands. .

DESCRIPTION OF SYMBOLS 1 Printed wiring board 2 V-shaped notch 3 Land 4 Winding terminal 6 Split iron core 7 Insulation insulator 8 Winding 10 Mold resin 11a, 11b, 11c, 11d Conductive metal plate 12 V-shaped notch

Claims (11)

A stator of a synchronous rotating machine comprising a plurality of divided iron cores that are assembled after mounting an insulator for insulation and wound with windings, and a printed wiring board that solders and connects the ends of the windings. The printed wiring board is a donut-shaped disk that is mounted in the direction of the rotation axis of the insulator for insulation, and further has a V-shaped notch on the inner diameter side or outer diameter side, and the V-shaped notch. A land portion for soldering is formed along the notch, the end of each winding is sandwiched by the V-shaped notch, and electrically connected to the land portion by solder, Synchronous rotating machine stator connected to each other. The stator of the synchronous rotating machine according to claim 1, wherein the divided iron core on which the printed wiring board is mounted is integrated with a mold resin. The stator of a synchronous rotating machine according to claim 1 or 2, wherein the printed wiring board is a stator of a sensorless drive motor that does not include electronic components such as a magnetic sensor and a drive circuit. The printed wiring board is prepared so that each winding is connected in parallel to each phase and connected in series, and is used properly according to the power supply voltage supplied to the stator to connect each winding. The stator of a synchronous rotating machine according to any one of claims 1 to 3. The number of divisions of the divided iron core is 12, a 3-phase, 12-slot stator is prepared, and a printed wiring board is prepared for the rotor with 8 poles and 10 poles, depending on the number of poles of the rotor. The stator of a synchronous rotating machine according to any one of claims 1 to 4, wherein the windings are connected. A stator of a synchronous rotating machine comprising a plurality of divided iron cores that are assembled after mounting an insulator for insulation and wound with windings, and a plurality of conductive metal plates that are soldered and connected to the ends of the windings. The conductive metal plate is a donut-shaped disk, attached to the insulator for insulation, provided in layers according to a winding connection pattern, and formed with a V-shaped notch on the inner diameter side or outer diameter side, A synchronous rotating machine in which the ends of the respective windings are sandwiched by V-shaped notches provided on the predetermined conductive metal plate and are electrically connected by soldering so that the respective windings are connected to each other. stator. The stator of the synchronous rotating machine according to claim 6, wherein the divided iron core on which the conductive metal plate is mounted is integrated with a mold resin. The stator of a synchronous rotating machine according to claim 6 or 7, wherein the conductive metal plate is a stator of a sensorless drive motor in which electronic parts such as a magnetic sensor and a drive circuit are not mounted. The conductive metal plate is prepared so that each winding is connected in parallel for each phase and in series, and is used properly according to the power supply voltage supplied to the stator to connect each winding. A stator for a synchronous rotating machine according to any one of claims 6 to 8. The number of divided cores is 12, and a 3-phase 12-slot stator is prepared, and a conductive metal plate is prepared for 8 and 10 poles of the rotor, depending on the number of poles of the rotor, The stator of a synchronous rotating machine according to any one of claims 6 to 9, wherein the windings are connected. A brushless DC fan motor for air conditioning comprising the stator of the synchronous rotating machine according to any one of claims 1 to 10.

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