WO2016151816A1 - 電動機および換気扇 - Google Patents
電動機および換気扇 Download PDFInfo
- Publication number
- WO2016151816A1 WO2016151816A1 PCT/JP2015/059220 JP2015059220W WO2016151816A1 WO 2016151816 A1 WO2016151816 A1 WO 2016151816A1 JP 2015059220 W JP2015059220 W JP 2015059220W WO 2016151816 A1 WO2016151816 A1 WO 2016151816A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bracket
- rotor
- electric motor
- shaft
- substrate
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
- H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/15—Mounting arrangements for bearing-shields or end plates
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
Definitions
- the present invention relates to an electric motor including a stator and a rotor and a ventilation fan using the electric motor.
- Patent Document 1 discloses an electric motor including a bearing that rotatably holds a shaft, a bracket that holds the bearing, and a board that is provided on the opposite side of the bearing with the bracket interposed therebetween.
- the rotation position of the rotor is detected by a Hall IC (Integrated Circuit) which is a position detection unit provided on the substrate.
- a spring may be inserted between a bearing and a bracket in order to apply a load to the bearing.
- the spring applies a force in a direction to separate the bearing and the bracket. If the bracket is deformed by the force applied from the spring, an appropriate force cannot be applied to the bearing, and the life of the bearing is reduced or smooth rotation operation is hindered. Further, the bracket is required to have a strength that is not broken by an impact caused by vibration or dropping.
- One way to improve the strength of the bracket is to increase the thickness of the bracket.
- increasing the thickness of the bracket increases the distance between the Hall IC and the rotor, which may reduce the accuracy of position detection.
- by increasing the plate thickness of the bracket when the bracket is resin-molded, molding defects represented by sink marks are likely to occur.
- increasing the thickness of the bracket increases the size of the electric motor.
- the present invention has been made in view of the above, and it is possible to improve the strength of the bracket, improve the position detection accuracy of the rotor, and reduce the size of the apparatus while suppressing an increase in the distance between the position detection unit and the rotor. It is an object to obtain an electric motor that can be realized.
- the present invention is connected to a rotor having a cylindrical shape, a frame that houses the stator therein, a rotor that is disposed inside the stator, and the rotor.
- the bracket includes a shaft, a bracket that rotatably supports the shaft, a board that is provided on the opposite side of the rotor across the bracket, and a position detection unit that is mounted on the board and detects the rotational position of the rotor. Is characterized in that a rib having a honeycomb shape is formed along the extending direction of the shaft.
- the electric motor according to the present invention is capable of improving the strength of the bracket, improving the position detection accuracy of the rotor, and reducing the size of the device while suppressing an increase in the distance between the position detection unit and the rotor. Play.
- FIG. 1 is a side view of a DC brushless motor according to a first embodiment of the present invention.
- FIG. 3 is a cross-sectional view of the bracket according to Embodiment 1 and is a cross-sectional view taken along the line AA shown in FIG.
- the DC brushless motor concerning Embodiment 1 WHEREIN The partial expanded sectional view which expanded the part in which Hall IC and the electronic component were provided. Sectional drawing of the ventilation fan concerning Embodiment 2 of this invention
- FIG. 1 is a side view of the DC brushless motor according to the first embodiment of the present invention.
- the left side of the central axis 30 is shown as a cross-sectional view.
- hatching other than the bracket 7 is omitted for easy understanding of the drawing.
- each element is housed inside an outer shell composed of a frame 2 and a cover 8.
- the frame 2 has a bottomed cylindrical shape and is made of metal.
- a stator 3 having a cylindrical shape is press-fitted and accommodated in the inner diameter of the frame 2.
- the stator 3 is configured by winding a coil 3b around an iron core 3a.
- a rotor 6b having an annular shape is disposed inside the stator 3.
- a shaft 6a extending along the central axis 30 of the stator 3 is connected to the rotor 6b.
- One end side of the shaft 6 a protrudes outside the frame 2.
- one end side of the shaft 6a protruding outside from the frame 2 is referred to as a front side, and the other end side that is the opposite side is referred to as a rear side.
- the shaft 6a is provided with a front bearing 4a on the front side of the connecting portion with the rotor 6b, and with a rear bearing 4b on the rear side of the connecting portion with the rotor 6b.
- Each of the bearings 4a and 4b holds the shaft 6a so as to be rotatable about the central axis 30.
- the front bearing 4 a is held by a housing 2 a formed on the frame 2.
- a bracket 7 for holding the rear bearing 4b is provided at a position opposite to the rotor 6b across the rear bearing 4b.
- the bracket 7 holds the shaft 6a via the rear bearing 4b.
- the bracket 7 is made of resin.
- the bracket 7 is formed with a bracket housing 7b that holds the rear bearing 4b.
- a spring 5 that is an urging force applying portion is provided between the bracket 7 and the rear bearing 4b.
- the spring 5 exerts a force in a direction in which the rear bearing 4 b and the bracket 7 are separated along the central axis 30.
- the spring 5 applies a force necessary for the rear bearing 4b to operate properly to the rear bearing 4b.
- a substrate 9 is provided on the opposite side of the rotor 6b with the bracket 7 interposed therebetween.
- a biasing force that is biased toward the substrate 9 is applied to the bracket 7 by the spring 5.
- FIG. 2 is a view of the bracket 7 in the first embodiment as viewed from the substrate 9 side.
- FIG. 3 is a cross-sectional view of the bracket 7 according to the first embodiment and is a cross-sectional view taken along the line AA shown in FIG.
- the bracket 7 has a disk shape as a whole so as to close the open portion of the frame 2.
- An outer peripheral portion of the bracket 7 is a bracket flange 7a, and is sandwiched between the frame flange 2b of the frame 2 and the cover flange 8a of the cover 8 as shown in FIG.
- the frame 2, the cover 8, and the bracket 7 are fixed by screws with screws penetrating the frame flange 2b, the cover flange 8a, and the bracket flange 7a.
- the bracket flange 7a, the frame flange 2b, and the cover flange 8a are formed with holes for fixing the DC brushless motor 1 to the product with screws.
- An example of a product to which the DC brushless motor 1 is fixed is a ventilation fan.
- the bracket 7 is formed with a rib 33 protruding toward the substrate 9 side.
- the ribs 33 are formed in a honeycomb shape in which hexagonal shapes are arranged along the central axis 30.
- the strength can be improved while suppressing the plate thickness of the plate-like portion of the bracket 7.
- production of the molding defect represented by sink can be suppressed and size reduction of the DC brushless motor 1 can be achieved.
- the improvement in strength can suppress the occurrence of cracking and deformation of the bracket 7 and improve the reliability of the DC brushless motor 1.
- the board 9 is provided with a Hall IC 31 which is a position detection unit for detecting the rotational position of the rotor 6b, a drive circuit for rotating the rotor 6b, a power supply circuit, and an electronic component 32 constituting a microcomputer. ing.
- the Hall IC 31 and the rotor 6 b are attached to the surface of the substrate 9 that faces the bracket 7.
- FIG. 4 is a partial enlarged cross-sectional view in which the portion where the Hall IC 31 and the electronic component 32 are provided is enlarged in the DC brushless motor 1 according to the first embodiment.
- the distance between the substrate 9 and the bracket 7 can be reduced.
- the accuracy of the position detection of the rotor 6b by the Hall IC 31 can be improved.
- the bracket 7 is made of resin and has insulation, the creeping distance in the radial direction between the coil 3b, the pin 3c erected on the coil 3b, the substrate 9, the frame 2, and the cover 8 is ensured. be able to. Further, in the direction along the central axis 30, the distance between the coil 3 b and the bracket 7 can be reduced, and the distance between the substrate 9 and the bracket 7 can be reduced, thereby reducing the size of the DC brushless motor 1. It becomes possible to plan.
- the substrate 9 is supplied with commercial AC power from the outside, and the AC power is converted into a DC voltage by the power circuit as the electronic component 32, and the power is supplied at a voltage corresponding to each element.
- the drive circuit which is the electronic component 32 generates an alternating voltage through the pin 3c so that a current flows in a predetermined direction with respect to the coil 3b provided in the stator 3.
- the rotor 6b and the shaft 6a are rotated by the current flowing through the coil 3b.
- the microcomputer which is the electronic component 32, detects the induced voltage phase of the motor based on the signal from the Hall IC 31, and controls the induced voltage phase and the motor phase current phase generated from the drive circuit to be in phase. By controlling the induced voltage phase and the motor phase current phase to be the same phase, the efficiency of the DC brushless motor 1 can be improved.
- FIG. FIG. 5 is a cross-sectional view of the ventilation fan according to the second embodiment of the present invention. In FIG. 5, some hatching is omitted for easy understanding of the drawing.
- the ventilation fan 11 is configured by attaching the DC brushless motor 1 described in the first embodiment to a body 12. A blade 13 is fixed to the tip of the shaft 6 a of the DC brushless motor 1.
- the ventilation fan 11 has a structure in which a body 12 is installed on a ceiling plate 14 and a grill 15 is attached to the body 12. As the shaft 6a of the DC brushless motor 1 rotates and the blade 13 also rotates, an air flow indicated by an arrow D in FIG. 5 is generated.
- a circuit part provided with a substrate 9 and a motor part provided with a rotor 6b and a stator 3 are partitioned by a bracket 7. Therefore, although the motor unit is exposed to the air flow, the circuit unit is a space that is cut off from the air flow and is not likely to be a high humidity space.
- the ventilation fan 11 provided with the DC brushless motor 1 can be used for ventilation in a high humidity atmosphere.
- An example of the high humidity atmosphere is a bathroom.
- the ventilation fan 11 can be reduced in size by reducing the size of the DC brushless motor 1. Thereby, it can be set as the ventilation fan 11 which is easy to install in the ceiling back with a limited space.
- the configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Motor Or Generator Frames (AREA)
Abstract
Description
図1は、本発明の実施の形態1にかかるDCブラシレスモーターの側面図である。図1では、中心軸30よりも左側を断面図として示している。また、図1では、図面の理解容易化のために、ブラケット7以外のハッチングを省略している。
図5は、本発明の実施の形態2にかかる換気扇の断面図である。図5では、図面の理解の容易化のために一部のハッチングを省略している。換気扇11は、上記実施の形態1で説明したDCブラシレスモーター1がボディ12に取り付けられて構成される。DCブラシレスモーター1のシャフト6aの先端には、羽根13が固定されている。
Claims (5)
- 筒状形状を呈するステーターと、
前記ステーターを内部に収容するフレームと、
前記ステーターの内側に配置されるローターと、
前記ローターに連結されたシャフトと、
前記シャフトを回転可能に保持するブラケットと、
前記ブラケットを挟んで前記ローターの反対側に設けられた基板と、
前記基板に搭載されて前記ローターの回転位置を検出する位置検出部と、を備え、
前記ブラケットには、前記シャフトの延びる方向に沿って見てハニカム形状を呈するリブが形成されること特徴とする電動機。 - 前記リブは、前記基板側に向けて突出するように形成され、
前記位置検出部は、前記シャフトの延びる方向に沿って見て前記リブを避ける位置に配置されることを特徴とする請求項1に記載の電動機。 - 前記基板に搭載された電子部品をさらに備え、
前記リブは、前記基板側に向けて突出するように形成され、
前記電子部品は、前記シャフトの延びる方向に沿って見て前記リブを避ける位置に配置されることを特徴とする請求項1に記載の電動機。 - 前記ブラケットは、樹脂製であることを特徴とする請求項1~3のいずれか1つに記載の電動機。
- 請求項1~4のいずれか1つに記載の電動機と、
前記シャフトに連結された羽根と、
前記羽根を内部に収容するボディと、を備えることを特徴とする換気扇。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112015006358.7T DE112015006358T5 (de) | 2015-03-25 | 2015-03-25 | Elektromotor und Belüftungsgebläse |
PCT/JP2015/059220 WO2016151816A1 (ja) | 2015-03-25 | 2015-03-25 | 電動機および換気扇 |
CN201580075812.5A CN107306513B (zh) | 2015-03-25 | 2015-03-25 | 电动机和换气扇 |
JP2017507259A JP6400180B2 (ja) | 2015-03-25 | 2015-03-25 | 電動機および換気扇 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2015/059220 WO2016151816A1 (ja) | 2015-03-25 | 2015-03-25 | 電動機および換気扇 |
Publications (1)
Publication Number | Publication Date |
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WO2016151816A1 true WO2016151816A1 (ja) | 2016-09-29 |
Family
ID=56977876
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2015/059220 WO2016151816A1 (ja) | 2015-03-25 | 2015-03-25 | 電動機および換気扇 |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP6400180B2 (ja) |
CN (1) | CN107306513B (ja) |
DE (1) | DE112015006358T5 (ja) |
WO (1) | WO2016151816A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109586514A (zh) * | 2017-09-29 | 2019-04-05 | 日本电产株式会社 | 马达以及马达单元 |
JP2021057973A (ja) * | 2019-09-30 | 2021-04-08 | 日本電産株式会社 | モータユニット |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI676339B (zh) * | 2018-03-20 | 2019-11-01 | 元山科技工業股份有限公司 | 電動機 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0288464U (ja) * | 1988-12-23 | 1990-07-12 | ||
JP2009211745A (ja) * | 2008-03-03 | 2009-09-17 | Panasonic Corp | ディスク駆動装置 |
JP2010263697A (ja) * | 2009-05-07 | 2010-11-18 | Denso Corp | 電動機 |
JP2011072124A (ja) * | 2009-09-25 | 2011-04-07 | Valeo Thermal Systems Japan Corp | 駆動モータ |
JP2011223675A (ja) * | 2010-04-06 | 2011-11-04 | Ebara Corp | 回転電機 |
JP2012253846A (ja) * | 2011-05-31 | 2012-12-20 | Mitsubishi Electric Corp | 電動機および換気扇 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2424080A4 (en) * | 2009-04-23 | 2017-06-28 | Valeo Japan Co., Ltd. | Driving motor |
-
2015
- 2015-03-25 JP JP2017507259A patent/JP6400180B2/ja active Active
- 2015-03-25 WO PCT/JP2015/059220 patent/WO2016151816A1/ja active Application Filing
- 2015-03-25 CN CN201580075812.5A patent/CN107306513B/zh active Active
- 2015-03-25 DE DE112015006358.7T patent/DE112015006358T5/de active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0288464U (ja) * | 1988-12-23 | 1990-07-12 | ||
JP2009211745A (ja) * | 2008-03-03 | 2009-09-17 | Panasonic Corp | ディスク駆動装置 |
JP2010263697A (ja) * | 2009-05-07 | 2010-11-18 | Denso Corp | 電動機 |
JP2011072124A (ja) * | 2009-09-25 | 2011-04-07 | Valeo Thermal Systems Japan Corp | 駆動モータ |
JP2011223675A (ja) * | 2010-04-06 | 2011-11-04 | Ebara Corp | 回転電機 |
JP2012253846A (ja) * | 2011-05-31 | 2012-12-20 | Mitsubishi Electric Corp | 電動機および換気扇 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109586514A (zh) * | 2017-09-29 | 2019-04-05 | 日本电产株式会社 | 马达以及马达单元 |
CN109586514B (zh) * | 2017-09-29 | 2021-08-31 | 日本电产株式会社 | 马达以及马达单元 |
JP2021057973A (ja) * | 2019-09-30 | 2021-04-08 | 日本電産株式会社 | モータユニット |
JP7400305B2 (ja) | 2019-09-30 | 2023-12-19 | ニデック株式会社 | モータユニット |
Also Published As
Publication number | Publication date |
---|---|
DE112015006358T5 (de) | 2017-12-14 |
JPWO2016151816A1 (ja) | 2017-06-22 |
JP6400180B2 (ja) | 2018-10-03 |
CN107306513B (zh) | 2020-03-20 |
CN107306513A (zh) | 2017-10-31 |
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