WO1998012793A1 - Moteur a detecteur de la temperature des enroulements - Google Patents
Moteur a detecteur de la temperature des enroulements Download PDFInfo
- Publication number
- WO1998012793A1 WO1998012793A1 PCT/JP1997/003304 JP9703304W WO9812793A1 WO 1998012793 A1 WO1998012793 A1 WO 1998012793A1 JP 9703304 W JP9703304 W JP 9703304W WO 9812793 A1 WO9812793 A1 WO 9812793A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- detecting element
- temperature detecting
- winding
- motor
- holder
- Prior art date
Links
- 238000004804 winding Methods 0.000 title claims abstract description 91
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 239000011347 resin Substances 0.000 claims description 9
- 229920005989 resin Polymers 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 239000013013 elastic material Substances 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims 1
- 238000000034 method Methods 0.000 description 8
- 238000012545 processing Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
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
- H02K11/25—Devices for sensing temperature, or actuated thereby
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/32—Thermally-sensitive members
- H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
- H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
- H01H37/5427—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting encapsulated in sealed miniaturised housing
- H01H37/5436—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting encapsulated in sealed miniaturised housing mounted on controlled apparatus
Definitions
- the present invention relates to a motor in which a temperature detecting element for detecting a temperature of a winding for protecting a winding of a motor is attached to a fixed portion such as a housing of a motor body.
- the motor windings generate heat due to iron loss and resistance loss.
- the temperature of the winding is detected to prevent heat loss of the winding due to this heat generation.
- a method of embedding a temperature detecting element in the winding between the windings and a method of fixing the temperature detecting element to the winding with a string or the like are used. I have.
- FIG. 7, FIG. 8A and FIG. 8B are views for explaining a method of attaching a winding temperature detecting element of a conventional motor.
- a part of the motor is cut away to show the windings.
- FIG. 8A and FIG. 8B show only a portion where the temperature detecting element is attached to the motor.
- the motor shown in FIG. 7 includes a stay 12 around which a winding 13 is wound, and a rotor 10 rotatably supported by a rotor shaft 11 in the stay 12. . Further, a front flange 15 is provided at one end of the stay 12 in the axial direction, and a rear housing 14 is provided at the other end. Temperature detecting element for detecting the temperature of winding 13 of stator 1 2 Reference numeral 1 denotes a detecting element for detecting the thermistor, and the detection output is taken out via a lead wire 3.
- Figure 8A shows the method of embedding the temperature detecting element between the windings.
- To embed the temperature detecting element between the windings attach the winding 13 to the stay 12 and widen the gap between the windings at the time of wire processing at the end of the winding to open a gap, and detect the temperature in the gap After embedding element 1 and fixing it, infiltration processing is performed.
- Fig. 8B shows the method of fixing the temperature detection element to the winding with a string. Even with this string, the winding 13 is attached to the stay 12, and a part of the winding 13 is wrapped with the string 40 when the end of the winding is processed. Detection element
- An object of the present invention is a motor provided with a temperature detecting element for detecting a temperature of a winding of the motor, and a structure which facilitates mounting of the temperature detecting element on the motor main body.
- An object of the present invention is to provide a motor provided on the element side.
- a through hole is formed in a part of a housing of the motor, and a temperature detecting element is inserted and held in the through hole.
- the winding temperature detecting element is inserted and held in the through hole of the housing while being held by a holder made of a film material or an elastic member.
- At least a part of the outer peripheral portion of the holder extends outward when the holder is not inserted into the through hole of the housing. When inserted, a folded piece is formed which is pressed by the through hole and narrows.
- a sleeve longer than the thickness of the housing is fitted into the through hole of the housing, and the housing is provided with a housing.
- a part of the sleeve protrudes from the inner surface of the sleeve toward the s-motor winding, and a holder holding a temperature detecting element is inserted into and held by the sleeve.
- a high thermal conductive resin is applied to a contact portion between the temperature detecting element and the motor winding.
- the present invention it is possible to efficiently and automatically attach the temperature detecting element to the winding without attaching any processing to the winding itself when attaching the winding temperature detecting element to the motor body. Can be. Also, since the mounting position of the temperature detecting element can be always kept constant, stable winding temperature detection can be performed.
- FIG. 1 is a perspective view showing a main part of a motor according to a first embodiment of the present invention, in which a winding temperature detecting element held by a holder is inserted into a guide hole formed in a housing of the motor. It shows that
- FIG. 2 is a cross-sectional view showing a state in which the winding temperature detecting element held by a holder is inserted and held in a guide hole in the electric motor of FIG.
- FIG. 3 is a perspective view showing a modified example of the holder of FIG.
- FIG. 4 is a cross-sectional view showing a state in which the winding temperature detecting element held by the holder shown in FIG. 3 is attached to a housing of the electric motor.
- FIG. 5 is a perspective view showing a main part of an electric motor according to a second embodiment of the present invention, and a guide formed on a housing of the electric motor. Through the sleeve, and shows that the coil has a winding temperature sensing element held in the holder.
- FIG. 6 is a perspective view showing a main part of a motor according to a third embodiment of the present invention, and a winding temperature detecting element held in a guide hole formed in a housing of the motor by a holder made of an elastic material. Is inserted and retained.
- FIG. 7 is a perspective view for explaining a method of attaching a winding temperature detecting element to a motor according to a conventional technique.
- FIG. 8A and 8B are perspective views showing a state in which the winding temperature detecting element attached by the method shown in FIG. 7 is attached to a motor.
- FIG. 1 A motor having a winding temperature detecting element according to a first embodiment will be described with reference to FIGS. 1 and 2.
- FIG. 1 In the perspective view of Fig. 1, a part of the motor is notched to show the internal winding.
- the electric motor is rotatably supported by a stay 12 around which the winding 13 is wound, and a rotatable shaft 11 in the stay 12. And a rotor 10.
- One end of the stay 12 in the axial direction is provided with a front flange 15 and the other end is provided with a rear housing 14.
- the temperature detecting element 1 is an element for detecting the temperature of the winding, such as a thermistor. The detection signal is taken out via the lead line 3.
- a through hole (guide hole 16) for receiving and holding the temperature detecting element 1 is formed in the rear housing 14 of the motor.
- the guide hole 16 is formed when the housing is formed by, for example, aluminum die casting.
- the guide hole 16 is high so that no gap is generated when the temperature detecting element 1 is inserted so that a stable state is maintained. High precision machining must be performed separately.
- the guide hole 16 is formed larger in advance with respect to the temperature detecting element 1 while the outer peripheral portion of the temperature detecting element 1 is held by the holder 2 so that the temperature If detecting element 1 is inserted into guide hole 16 with holder 1 attached, temperature detecting element 1 is stable in guide hole 16 by adjusting the thickness of holder 2. can do.
- the holder 2 serves to hold the temperature detecting element 1 in the guide hole 16 and also serves as a thermal insulator that prevents the temperature detecting element 1 from receiving heat conduction from a portion other than a portion in contact with the winding 13. Also serves as. Accordingly, the holder 2 is made of a material having low thermal conductivity such as PET (polyethene etherephtha late), and can be molded by a film material or an injection molded product.
- PET polyethene etherephtha late
- the simple point where the guide hole 16 is formed is that of the housing.
- the housing is not limited to the rear housing 14 and may be any other part of the housing.
- FIG. 2 shows a state in which the temperature detecting element 1 held by the holder 2 is inserted into the guide hole 16 formed in the housing 14.
- the tip of the temperature detecting element 1 is exposed without being covered by the holder 2 and comes into contact with a part of the winding 13 of the motor.
- the temperature detecting element 1 measures the temperature of the winding 13 through a contact portion with the winding 13, and extracts a detection signal via the lead wire 3.
- the fixing of the temperature detecting element 1 to the housing 14 is performed by frictional resistance generated by the contact between the inner surface of the guide hole 16 and the outer peripheral surface of the holder 2. Further, heat conduction from the rear housing 14 side is thermally insulated by the low heat conductivity of the holder 2.
- the present embodiment by inserting the temperature detecting element 1 into the guide hole 16 formed in the housing of the motor, a motor having the winding temperature detecting element is formed. Therefore, the relative positional relationship between the temperature detecting element 1 and the winding 13 in the stay is uniformly determined by the position where the guide hole 16 is formed. In addition, since no processing is performed on the winding 13 when mounting the temperature detecting element ⁇ ⁇ ⁇ ⁇ , the winding is not damaged, and the work is simplified. As a result, the work of attaching the temperature detecting element to the motor can be mechanized, and the detection environment of the temperature detecting element can be kept constant for each motor.
- FIGS a modified example of the holder in the electric motor according to the present embodiment will be described with reference to FIGS.
- the holder 21 is provided with a pair of opposite outer peripheral portions by making a cut in an inverted U-shape and then pulling the cut portion outward.
- the folded piece 2 2 is formed.
- the folded piece 22 extends upward (in the direction opposite to the guide hole insertion direction) from one location on the lower end side (the end side in the guide hole insertion direction) of the outer peripheral portion of the holder 21, and the tip is It is a free end. The distance between the pair of folded pieces 22 and the outer peripheral portion increases toward the tip.
- the folded piece 22 When the holder 21 is inserted into the guide hole 16 formed in the housing 14, the folded piece 22 is directed toward the holder outer periphery while being guided by the inner side surface of the guide hole 16, and then the holder outer periphery is reached. Become flush with the department. Furthermore, when the holder 21 is continuously inserted into the guide hole 16, the free end of the folded piece 22 does not contact the inner surface of the guide hole 16, and the folded piece 22 is Due to the elasticity, it spreads outward again, and comes into contact with the inner surface of the housing 14 as shown in FIG. In this state, even if a force is generated in the holder 21 in the direction of coming out of the guide hole 16, the force acts on the folded piece 22 in the further opening direction as shown in FIG. Does not come out of the guide hole 16 because of being hindered by the folded pieces 22.
- the folded piece 2 2 is a pair of Force formed by cutting out two opposite side surfaces.
- Folding piece 22 may be provided on the entire outer circumference (four simple places) of holder 21 or may be provided on one part thereof. Further, the folded piece 22 may be formed by other means than cutting out (for example, integrally forming with the holder 21 by injection molding).
- the temperature detecting element 1 is configured so that the holder 21 does not detect the temperature other than that of the motor winding 13. Further, a resin member 30 having high heat conductivity and good adhesiveness is applied to a contact surface between the temperature detecting element 1 and the winding 13. As a result, the thermal resistance at the portion where the temperature detecting element 1 contacts the winding 13 can be reduced, so that the temperature detecting accuracy of the temperature detecting element 1 can be improved.
- the resin member 30 immediately after application has flexibility, and when the temperature detecting element 1 and the winding 13 are kept in contact with each other, the resin member 30 cures and joins the contact surface and its periphery.
- the cured resin member 30 maintains contact between the temperature detecting element 1 and the windings 13 by strong adhesiveness, and obtains high temperature detecting accuracy by its high thermal conductivity. be able to.
- a silicon resin can be used as the resin member 30, for example.
- Second Embodiment A motor having a winding temperature detecting element according to a second embodiment will be described with reference to FIG.
- the temperature detecting element Since the distance between the housing 14 provided with the required guide hole and the winding 13 is relatively large, simply inserting the holder into the guide hole may cause the tip of the temperature detection element held by the holder to be too short. It deals with the case where it does not reach the motive winding 13.
- a sleeve 23 longer than the thickness of the housing 14 is inserted and fixed into the guide hole 16 of the housing 14, and the nozzle is fixed.
- a part of the sleeve 23 protrudes inward (in a direction toward the winding 13) from the inner surface of the housing 14 by a certain distance.
- the holder 21 holding the temperature detecting element 1 is inserted into the sleeve 23 and held at the lower end of the sleeve 23.
- the position of the holder 21 held by the sleeve 23 can be lower than the level of the nosing 14 (in the direction where the winding 13 is present).
- the tip of the temperature detecting element 1 held by the contact can be in contact with the motor winding 13.
- the sleeve 23 is selected to have an appropriate length according to the distance between the housing 14 provided with the guide hole and the winding 13.
- a resin member 30 is applied between the temperature detecting element 1 and the winding 13 to make contact between the temperature detecting element 1 and the winding 13. The heat is maintained and the heat conduction is good.
- the holder is made of rubber or the like. It is made of an elastic material and holds the temperature detecting element by its elasticity.
- the temperature detecting element 1 is held by a rubber holder 24.
- the holder 24 holding the temperature detecting element 1 is inserted into the guide hole 16 formed in the housing 14, the holder 24 is compressed by the guide hole 16. Is done.
- the holder 24 (and the temperature detecting element 1) inserted into the guide hole 16 is maintained at a predetermined position with respect to the guide hole 16 by its elastic restoring force, so that the temperature detecting element 1 Contact with motor winding 13 is maintained.
- the material of the holder 24 may be an elastic member other than rubber.
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97941190A EP0862259B1 (en) | 1996-09-18 | 1997-09-18 | Motor with winding temperature detecting element |
US09/077,037 US6153954A (en) | 1996-09-18 | 1997-09-18 | Motor equipped with a coil temperature sensing element |
DE69726112T DE69726112T2 (de) | 1996-09-18 | 1997-09-18 | Motor mit wicklungstemperaturdetektor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8/266563 | 1996-09-18 | ||
JP8266563A JP2921752B2 (ja) | 1996-09-18 | 1996-09-18 | 電動機の巻線温度検出素子の取付け方法および取付け具 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998012793A1 true WO1998012793A1 (fr) | 1998-03-26 |
Family
ID=17432579
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1997/003304 WO1998012793A1 (fr) | 1996-09-18 | 1997-09-18 | Moteur a detecteur de la temperature des enroulements |
Country Status (5)
Country | Link |
---|---|
US (1) | US6153954A (ja) |
EP (1) | EP0862259B1 (ja) |
JP (1) | JP2921752B2 (ja) |
DE (1) | DE69726112T2 (ja) |
WO (1) | WO1998012793A1 (ja) |
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JP4237075B2 (ja) * | 2004-02-17 | 2009-03-11 | 三菱電機株式会社 | 回転電機 |
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1996
- 1996-09-18 JP JP8266563A patent/JP2921752B2/ja not_active Expired - Lifetime
-
1997
- 1997-09-18 EP EP97941190A patent/EP0862259B1/en not_active Expired - Lifetime
- 1997-09-18 WO PCT/JP1997/003304 patent/WO1998012793A1/ja active IP Right Grant
- 1997-09-18 DE DE69726112T patent/DE69726112T2/de not_active Expired - Lifetime
- 1997-09-18 US US09/077,037 patent/US6153954A/en not_active Expired - Lifetime
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JPS5246401A (en) * | 1975-10-13 | 1977-04-13 | Hitachi Ltd | Electric motor |
JPS55148321U (ja) * | 1979-04-11 | 1980-10-25 | ||
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4033644A1 (en) * | 2015-06-01 | 2022-07-27 | Prime Datum Development Company, LLC | Motor |
Also Published As
Publication number | Publication date |
---|---|
DE69726112D1 (de) | 2003-12-18 |
US6153954A (en) | 2000-11-28 |
EP0862259A4 (en) | 1999-12-29 |
EP0862259A1 (en) | 1998-09-02 |
DE69726112T2 (de) | 2004-04-22 |
JP2921752B2 (ja) | 1999-07-19 |
EP0862259B1 (en) | 2003-11-12 |
JPH1094222A (ja) | 1998-04-10 |
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