JP2015061324A - Brushless dc motor and blower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a brushless DC motor capable of achieving both of a brushless DC motor with a drive circuit board and a brushless DC motor with no drive circuit board with a single stator structure.SOLUTION: The brushless DC motor includes: a plurality of laminated stator cores 1; an insulator 2 which forms an insulation layer on the surface of the stator cores 1 and which has small and large two protrusions 21 extending on the outer periphery of the stator cores 1 on the generally same plane as one end face of the stator cores 1 in a lamination direction; connector holders 4a and 4b which are formed on the larger protrusion 22 on the outer periphery of the stator cores 1; and a connector 3 which has a connector terminal 9 attached to the connector holders 4a and 4b. The insulator 2 includes: the larger protrusion 22 formed with a connector adjacent hole 5; the smaller protrusion 23 formed with an outer periphery hole 6; and board holding parts 8a, 8b and 8c for holding a drive circuit board 7 which are formed at the protrusion 21 side of the stator core 1 in the lamination direction.

Description

  The present invention is equipped with a brushless DC motor for driving a fan, such as a ceiling-embedded exhaust and intake ventilator, a blower, a humidifier, a dehumidifier, a refrigeration apparatus, an air conditioner, a water heater, and the like. The present invention relates to a blower.

  In recent years, brushless DC motors are increasingly used in air blowers mounted on electrical devices such as ventilators for the purpose of reducing the power consumption of the devices. The brushless DC motor is classified into a type in which a drive circuit board is built in the motor and a type in which a drive circuit board is not built in and driven by an external circuit.

  In the motor of the type in which the drive circuit board is built in the motor, it can be driven simply by supplying power to the motor, which is highly convenient, but the structure in the motor is complicated. Further, when there is another control circuit board in the apparatus, there are two circuit boards in the apparatus because there is a driving circuit board in the motor.

  In the type of motor in which the drive circuit board is not built in the motor, the structure in the motor can be simplified, but a drive circuit needs to be provided separately. However, when there is another control circuit board in the apparatus, the motor drive circuit can be mounted on the control circuit board, and there is an advantage that the circuit boards in the apparatus can be integrated into one sheet.

  2. Description of the Related Art Conventionally, a brushless DC motor having such a drive circuit board built in a motor has the following configuration (see, for example, Patent Document 1).

  The brushless DC motor will be described with reference to FIGS.

  As shown in the stator structure of FIG. 9, a plurality of stacked stator cores 101, an insulator 102 that forms an insulating layer on the surface of the stator core, and terminal pins that stand on the insulator on the outer periphery of the stator core. A stator is composed of an outer peripheral hole portion 106 for mounting and a substrate holding portion 108a, 108b for holding the drive circuit substrate 107 in an insulator on the outer periphery of the stator core.

  Further, as shown in FIG. 10, the brushless DC motor connects the winding wound through the insulator 102 and the terminal pin 110 erected in the outer peripheral hole portion 106, so that the terminal pin 110 and the substrate holding portion 108a, 108b is connected to the drive circuit board 107 held, and the stator in a state where the drive circuit board 107 and the connector terminal 109 of the connector 103 held on the drive circuit board are connected is covered with the mold resin 105 to form a motor outline. In this structure, the rotor 104, the shaft 111, and the bearings 112a and 112b are integrated, and the lid is covered with the bracket 113.

JP 2008-141903 A

  In such a conventional brushless DC motor having a built-in drive circuit board in the motor, the drive circuit board has been configured so that terminal pin connection, connector holding, and connector terminal connection can be realized by incorporating the drive circuit board. Even when trying to realize a brushless DC motor without a built-in resistor, there is a problem that some substrate such as a wiring substrate is required.

  Therefore, the present invention solves the above-described conventional problems, and has a stator structure that can be applied to either a brushless DC motor with a built-in driving circuit board or a brushless DC motor without a built-in driving circuit board. An object is to provide a brushless DC motor.

  In order to achieve this object, the present invention provides a stator core stacked in a plurality of layers, an insulating layer formed on the surface of the stator core, and substantially the same as one end surface of the stator core in the stacking direction. An insulator that extends two large and small protrusions on the outer peripheral side of the stator core on the same surface, a connector holding part provided on the large protruding part on the outer peripheral side of the stator core, and the connector holding part The insulator having a connector terminal hole, a connector vicinity hole in the large protrusion, an outer peripheral hole in the small protrusion, and the drive circuit on the protrusion side in the stacking direction of the stator core. A board holding part for holding the board, and when the drive circuit board is built in, a terminal pin is erected in the outer peripheral hole part, and the drive circuit board is held by the board holding part, Said a When the winding and the terminal pin, the terminal pin and the drive circuit board, and the drive circuit board and the connector that are wound via a Schlator are connected, and the drive circuit board is not built in, the hole near the connector The terminal pin is erected, and it is a brushless DC motor capable of connecting the winding wound through the insulator and the terminal pin, and the terminal pin and the connector, thereby achieving the intended purpose. To achieve.

  According to the present invention, a plurality of laminated stator cores, and an insulating layer is formed on the surface of the stator core, and the stator core is substantially flush with one end face in the stacking direction of the stator cores. An insulator having two large and small projecting portions extending on the outer peripheral side of the stator, a connector holding portion provided on the large projecting portion on the outer peripheral side of the stator core, and a connector having a connector terminal attached to the connector holding portion. The insulator includes a connector vicinity hole in the large protrusion, an outer peripheral hole in the small protrusion, and a board holder for holding the drive circuit board on the protrusion in the stacking direction of the stator core. When the drive circuit board is built in, a terminal pin is erected in the outer peripheral hole part, the drive circuit board is held by the board holding part, and is wound through the insulator. Winding and the terminal pin, this terminal pin and the drive circuit board, the drive circuit board and the connector are connected, and when the drive circuit board is not built in, the terminal pin is erected in the connector vicinity hole, A brushless DC motor with a built-in drive circuit board in one type of stator structure by connecting the windings wound via an insulator and the terminal pins, and the terminal pins and the connector. Since both configurations of a brushless DC motor without a built-in drive circuit board can be realized, a device suitable for a brushless DC motor with a built-in drive circuit board and a built-in drive circuit board with one type of stator structure The brushless DC motor can be mounted on both suitable devices, and the stator can be used regardless of the built-in drive circuit board. Effect it is possible to obtain the called that.

External view showing the stator structure of the present invention Assembly drawing showing the stator configuration when the drive circuit board is built-in External view of connector part with built-in drive circuit board Perspective view showing the motor configuration when the drive circuit board is built-in Assembly drawing showing the stator configuration when the drive circuit board is not built-in External view of connector part without built-in drive circuit board Perspective view showing the motor configuration without a built-in drive circuit board Three-sided view showing a ventilator External view showing conventional stator structure Sectional drawing showing the structure of a conventional brushless DC motor

  The brushless DC motor according to claim 1 of the present invention includes a plurality of stacked stator cores, an insulating layer formed on the surface of the stator core, and substantially the same as one end surface of the stator core in the stacking direction. An insulator that extends two large and small protrusions on the outer peripheral side of the stator core on the surface, a connector holding part provided on the large protruding part on the outer peripheral side of the stator core, and a connector holding part A connector having a connector terminal, wherein the insulator includes a connector vicinity hole in the large protrusion, an outer peripheral hole in the small protrusion, and the drive circuit board on the protrusion in the stacking direction of the stator core. A board holding part for holding the drive circuit board, the terminal pin is erected in the outer peripheral hole part, the drive circuit board is held by the board holding part, When the winding wound through the insulator and the terminal pin, the terminal pin and the drive circuit board, the drive circuit board and the connector are connected, and the drive circuit board is not built in, the hole near the connector A terminal pin is erected, and the winding wound through the insulator and the terminal pin can be connected to the terminal pin and the connector.

  As a result, both the brushless DC motor with a built-in drive circuit board and the brushless DC motor with no built-in drive circuit board can be realized with one type of stator structure. The brushless DC motor with a built-in drive circuit board is suitable, and an apparatus with a brushless DC motor without a built-in drive circuit board is suitable.

  Further, in the circuit arrangement in the board when the drive circuit board is built in, there is an effect that the arrangement of power supply from the connector → drive signal generation → motor power supply to the terminal pins becomes easy.

  Further, the connector vicinity hole portion or the outer peripheral hole portion may be configured such that a plurality of terminal pins can be erected. As a result, it is possible to achieve single-phase driving using two terminal pins and three-phase driving using three terminal pins.

  Further, the height of the upper surface of the drive circuit board surface and the lower surface of the connector terminal may be matched on the same surface. Thereby, there is an effect that the connection between the board and the connector terminal when the drive circuit board is built-in becomes easy.

  Furthermore, the substrate holding unit may be composed of a plurality of pieces. As a result, when holding a large substrate, all the substrate holding portions are used, and when holding a small substrate, a part of the substrate holding portions can be used to cope with a large and small substrate.

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

(Embodiment 1)
As shown in FIG. 1, a stator 11 according to this embodiment includes a stator core 1 that is stacked in plural, an insulating layer formed on the surface of the stator core 1, and one end face in the stacking direction of the stator core. Between the insulator 2 that extends two large and small protrusions 21 on the outer peripheral side of the stator core 1 on substantially the same plane, the connector holding parts 4a and 4b provided on the large protrusion 22 and the connector holding parts 4a and 4b A connector near hole 5 for standing three terminal pins 10 in the insulator 2, an outer peripheral hole 6 for standing three terminal pins at a position close to the connector holding portion 4 a with a small protrusion 23, and fixing The tip for holding the drive circuit board 7 standing upright at substantially equal intervals on the insulator 2 on the outer periphery of the core 1 consists of three hook-shaped board holding parts 8a, 8b, 8c.

  When the drive circuit board 7 is built in, as shown in FIG. 2, three terminal pins 10 are erected in the outer peripheral hole portion 6, and three phases are formed in the lower portion of the terminal pin 10 (the protruding portion 21 side of the insulator 2). The winding 12 is tangled and soldered. Further, the drive circuit board 7 is attached to the board holding portions 8a, 8b, and 8c, and the drive circuit board 7 is prevented from coming off by the hook configuration at the tips of the board holding portions 8a, 8b, and 8c. Further, the connector 3 is attached to the connector holding portions 4a and 4b.

  In this state, as shown in FIG. 3, the upper portion of the terminal pin 10 is soldered through the hole of the drive circuit board 7, and the connector terminal 9 and the drive circuit board 7 are soldered. By covering the stator 11 that has been connected with a mold resin, as shown in FIG. 4, a motor outline is formed, and the brushless DC motor 13 is completed.

  Further, when the drive circuit board 7 is not built in, as shown in FIG. 5, three terminal pins 10 are erected in the connector vicinity hole 5, and the lower portion of the terminal pin 10 (the protruding portion 21 side of the insulator 2) is provided. The three-phase windings 12 are tangled and soldered together. Further, the connector 3 is attached to the connector holding portions 4a and 4b. In this state, as shown in FIG. 6, the upper part of the connector terminal 9 and the terminal pin 10 is soldered. By covering the stator 11 that has been connected with the mold resin as shown in FIG. 7, a motor outline is formed as in FIG. 4, and the brushless DC motor 13 is completed.

  In this way, the connector 3 is not held by the drive circuit board 7, but is held by the insulator 2 by the connector holding portions 4a and 4b, so that both configurations of the drive circuit board 7 can be realized. Further, by dividing the holes for standing the terminal pins 10 into two places, when there is the drive circuit board 7, the connection can be realized with the same configuration as the conventional one, and when there is no drive circuit board, the terminal pins 10 and the connector are connected. The terminal 9 can be directly connected, and both configurations with and without the drive circuit board 7 can be realized.

  Further, as shown in FIG. 3, when the drive circuit board 7 is built in, it is provided in the connector vicinity hole 5 provided in the large protrusion 22 and the small protrusion 23 near the connector holding portions 4a and 4b. Since the three terminal pins 10 are provided upright in the outer peripheral hole 6, the positions of the connector terminals 9 and the terminal pins 10 do not overlap with each other, and the terminal pins 10 do not get in the way when the connector 3 is attached, and can be attached easily.

  Thereby, in the circuit arrangement in the board of the drive circuit board 7 built in the motor, the arrangement in the order of power supply from the connector → drive signal generation → motor power supply to the terminal pins is facilitated. Furthermore, since the three terminal pins 10 are erected in the outer peripheral hole 6 at a position close to the connector holding portions 4a and 4b without overlapping the connector vicinity hole 5, the positions of the connector terminal 9 and the terminal pin 10 do not overlap. Are close to each other. Thereby, in the circuit arrangement in the board of the drive circuit board 7 built in the motor, the arrangement in the order of power supply from the connector → drive signal generation → motor power supply to the terminal pins can be kept within a small range.

  Moreover, the connector vicinity hole part 5 and the outer peripheral hole part 6 of FIG. 1 are the structure of three holes in order to stand up the three terminal pins 10 and to solder-connect the three-phase winding 12. However, in the case of a single-phase motor, the connector vicinity hole 5 and the outer peripheral hole 6 have two holes in order to erect the two terminal pins 10 and solder the two-phase winding 12a. It may be a configuration.

  As shown in FIG. 3, when the drive circuit board 7 is built in, the height of the connector holding portions 4a and 4b and the hook height at the tips of the board holding portions 8a, 8b and 8c are adjusted. And the bottom surface of the connector terminal 9 have the same height. Thereby, the solder connection of the drive circuit board 7 and the connector terminal 9 is facilitated.

  When a drive circuit board is built in, a large board can be built using all three places of the board holding parts 8a, 8b and 8c. In the case of a small board, the board holding part 8c is used. Instead, the substrate can be held by using two locations of the substrate holding portions 8a and 8b.

  FIG. 8 shows a ventilator 14 as an example of a blower equipped with the brushless DC motor 13 having such a configuration. The ventilator 14 blows air by rotating the blower blade 15 with the brushless DC motor 13, and the dirty room air passes through the wall of the building through the duct and is discharged to the outside.

  By mounting the brushless DC motor of this embodiment on such a ventilation device, a brushless DC motor with a built-in drive circuit board is suitable, and a ventilation device with a brushless DC motor without a built-in drive circuit board is suitable. Both have the effect of being able to cope with one type of stator structure.

  The brushless DC motor according to the present invention can provide both a brushless DC motor with a built-in driving circuit board and a brushless DC motor without a built-in driving circuit board in one kind of stator structure. Therefore, a built-in drive circuit and a non-built-in drive circuit are useful as brushless DC motors used for exhaust and intake ventilation devices such as a ceiling-embedded type according to the specifications of the ventilation device.

DESCRIPTION OF SYMBOLS 1 Stator iron core 2 Insulator 3 Connector 4a, 4b Connector holding part 5 Connector vicinity hole part 6 Outer peripheral hole part 7 Drive circuit board 8a, 8b, 8c Board holding part 9 Connector terminal 10 Terminal pin 11 Stator 12, 12a Winding 13 Brushless DC motor 14 Ventilator 15 Blower 21 Projection 22 Large projection 23 Small projection

Claims (5)

A plurality of laminated stator cores,
An insulator which forms an insulating layer on the surface of the stator core and extends two large and small protrusions on the outer peripheral side of the stator core on substantially the same plane as one end surface in the stacking direction of the stator core;
A connector holding portion provided on the large protrusion on the outer peripheral side of the stator core;
A connector having a connector terminal to be attached to the connector holding portion,
The insulator is
A connector vicinity hole in the large protrusion, an outer peripheral hole in the small protrusion, and a board holding part for holding a drive circuit board on the protrusion in the stacking direction of the stator core;
When incorporating the drive circuit board,
Terminal pins are erected in the outer peripheral hole, the drive circuit board is held by the board holding part, and the windings and the terminal pins wound through the insulator, the terminal pins and the drive circuit board, Connect this drive circuit board and the connector,
When the drive circuit board is not built in,
A brushless DC motor in which a terminal pin is erected in the hole near the connector, and the winding wound through the insulator, the terminal pin, and the terminal pin and the connector can be connected.   The brushless DC motor according to claim 1, wherein a plurality of terminal pins can be erected in the connector vicinity hole portion or the outer peripheral hole portion.   3. The brushless DC motor according to claim 1, wherein the height of the upper surface of the drive circuit board and the lower surface of the connector terminal are set on the same surface.   The substrate holding unit is composed of a plurality of substrates, and all of the substrate holding units are used when holding a large substrate, and some of the substrate holding units are used when holding a small substrate. 3. The brushless DC motor according to any one of 3 above.   The air blower which mounts the brushless DC motor in any one of Claims 1-4.

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