GB2028006A - Electric motors - Google Patents
Electric motors Download PDFInfo
- Publication number
- GB2028006A GB2028006A GB7923247A GB7923247A GB2028006A GB 2028006 A GB2028006 A GB 2028006A GB 7923247 A GB7923247 A GB 7923247A GB 7923247 A GB7923247 A GB 7923247A GB 2028006 A GB2028006 A GB 2028006A
- Authority
- GB
- United Kingdom
- Prior art keywords
- motor
- power transistor
- plate
- brush
- insulating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000001816 cooling Methods 0.000 claims abstract description 11
- 239000004020 conductors Substances 0.000 claims abstract description 10
- 229910052751 metals Inorganic materials 0.000 claims abstract description 6
- 239000002184 metals Substances 0.000 claims abstract description 6
- 239000011810 insulating materials Substances 0.000 claims description 7
- 239000011347 resins Substances 0.000 claims description 2
- 229920005989 resins Polymers 0.000 claims description 2
- 238000004804 winding Methods 0.000 claims description 2
- 229920003023 plastics Polymers 0.000 abstract description 3
- 239000004033 plastics Substances 0.000 abstract description 3
- 280000782852 Connexions companies 0.000 description 13
- 238000002485 combustion reactions Methods 0.000 description 5
- 230000001681 protective Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 239000000110 cooling liquid Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 materials Substances 0.000 description 2
- 101710056757 MARVELD2 Proteins 0.000 description 1
- 240000006028 Sambucus nigra Species 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound 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[Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000000969 carriers Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent Effects 0.000 description 1
- -1 for example Substances 0.000 description 1
- 239000010410 layers Substances 0.000 description 1
- 238000000034 methods Methods 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
- H02K23/66—Structural association with auxiliary electric devices influencing the characteristic of, or controlling, the machine, e.g. with impedance, with switch
-
- 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
- H02K11/30—Structural association with control circuits or drive circuits
- H02K11/33—Drive circuits, e.g. power electronics
Abstract
Description
SPECIFICATION Electric motors It is known that in the cooling of an internal combustion engine of a motor vehicle, the heat exchanger, for example the radiator, may be associ ated with a fan driven by an electric motor. The electric motor may be stopped or started as a function of an operating variable of the motor such as, for example, the temperature of the cooling liquid, and by means of an electronic control device.
Instead of being used to effect control on an all-or-nothing basis, such device may be designed to vary the speed of the electric motor as a function of, for example, the temperature of the cooling liquid.
The electronic control devices referred to above normally comprise discrete electronic elements, which are connected on a support plate, as well as at least one power transistor associated with a cooling radiator. Since the electronic control device is arranged close to the internal combustion engine, it is usually accommodated in a protective case which must not only be connected to the motor by conductors, but must also be so designed that the radiator of the power transistor can be efficiently cooled.
The object of the present invention is to provide an electric motor, particularly an electronically control led fan motor, wherein at least part of the wiring connecting the electronic control device to the electric motor is dispensed with by using one of the side-plates of the motor as the radiator of the power transistor. In a preferred embodiment of the inven tion, the support on which are connectd the other electronic components of the control device is constituted by the brush-holder plate of the associ ated motor, which plate is arranged opposite the side-plate on which is mounted the power transistor.
Such an arrangement offers the two fold advantage of eliminating the hitherto necessary protective case, since the electronic elements of the control device are now located within the motor, and of making use of the brush-holder plate as a support for the electronic elements of the control device.
The present invention therefore provides an elec tric motor having a commutator, particularly a fan motor designed to be associated with a heat exchanger of an internal combustion engine for motor vehicles, wherein the conductive collector plates of the commutator are connected electrically to the rotor winding and are in frictional engagement with brushes carried by a support plate of insulating material and the rotor shaft is journalled in two metallic end-plates of the motor, the electric motor being associated with an electronic control device which enables the electric motor to be stopped or started and/or its speed to be varied as a function of at least one parameter, the control device compris ing electronic components, connected by and car ried on the insulating brush support plate; and also comprising a power transistor provided with a radiator, the radiator of the power transistor being constituted by one of the two metal end-plates of the motor.
In a preferrred embodiment, the side-plate of the motor that carries the power transistor has cooling fins projecting from that of its faces disposed outside the motor and the power transistor is housed in a dished portion formed in that face of the side-plate disposed on the outside of the motors disc of electrically insulating material being optionally interposed between the powertransistor and the base of the dished portion, on which base the transistor bears. The above mentioned dished portion maybe filled at least partially with an insulating resin after the power transistor has been fitted. When the motor drives a fan, the side-plate carrying the power transistor is preferably that of the two side-plates of the motor that is disposed at the opposite end of the motor to said fan.
In a particularly advantageous form of the electric motor in accordance with the invention, the electronic components of the electronic device are connected by and carried on the above-mentioned brush-holder plate, the connexions between said electronic components being printed on said plate.
In this case, the electronic components of the control device and the brushes which sweep the collector are peferably arranged at one and the same side of the brush-holder plate and facing the side-plate which carries the power transistor; the brush-holder plate takes the form of a circular disc extending perpendicularlyto the shaft of the rotor and disposed around the collector.
The electrical junction between the connexions of the printed circuit provided to the brush-holder plate and the power transistor is achieved by means of a connecting member secured to the brush-holder plate, this connecting member permitting the power transistor to be detachably joined to the abovementioned plate. Advantageously, the connecting member consists of a single part which comprises two cross-pieces and two clips interconnected by a base; the two screws for securing the power transistor to the associated side-plate extend through the two cross-pieces, whereas the two clips receive the electrical conductors of the power transistor; at least one of the two above-mentioned screws also provides the third electrical connextion between the power transistor and the connections of the printed circuit.
Compared with the existing systems wherein the electronic control means consisted of a unit dependent of the electric motor, the device in accordance with the invention offers three advantages: first, that of dispensing with exterior connecting wires between the electronic control means and the electric motor and of simultaneously making use of one of the two side-plates of the motor as the radiator of the power transistor; secondly that of dispensing with the protective case forthe electronic control means by housing the electronic components, other than the power transistor, within the electric motor; and finally that of using the brush-holder plate for carrying the connexions of the printed circuit and the electronic components of the control system.
The housings for the brushes are preferably secured to that face of the plate, on which the printed circuit and the electronic control components are disposed, and opposite that side-plate of the motor that carries the power transistor. The junctions between the conductors of the electronic components and the connexions of the printed circuit on the brush-holder plate can be achieved in the conventional manner by submerged-arc welding.
It may also be pointed out that the electronic control device in no way interferes with the operations of fitting and moving the electric motor, since the electronic control components apart, of course, from the power transistor, are secured to the plate which is normally used for supporting the brushhousings, and since a connecting member is simply provided between the power transistor and the other electronic components of the brush-holder plate.
To enable the subject-matter of the invention to be better understood, a form of construction illustrated in the attached drawings will now be described simply as a non-limiting example.
In the drawings: Figure 1 illustrates a fan motor in accordance with the invention in longitudinal section along the line 1-1 of Figure 2, and Figure 2 shows an elevational view along the line 11-11 of Figure 1.
Referring to the attached drawings, it will be seen that the numberal 1 designates as a whole an electric motor in accordance with the invention designed to power a fan (not illustrated). This fan-motor assembly is intended to be located opposite the cooling radiator of an internal combustion engine for motor vehicles.
The fan is secured to the projecting end 2a of the shaft 2 of the rotor. The motor stator is formed by fitting two side-plates 4, 5 around a stator ring 26 with the aid of four screw-bolts 3. The rotor shaft 2 is journalled within the two metal side-plates 4 and 5; the side-plate 4 is arranged opposite the fan (not illustrated) whereas the side plate 5 is located at the side remote from the fan. A commutator 6 is fitted around the rotor shaft 2; it comprises a sleeve of insulating material on the periphery of which are secured conductive collector plates 7 which are disposed parallel with the axis of the commutator and are connected to the rotor windings 8. Brushes (not illustrated), used for carrying current to the rotor, rub over these plates 7.In the conventional manner, a plate 10 of insulating material, for example a plastics material, carries housings for the brushes which rub on the plates 7. The brush-holder plate 10 takes the form of a circular disc arranged around the commutator 6 and extending perpendi cularlyto the axis of the shaft of the rotor. The brushes and their associated housings (not illustrated) are arranged on that face of the plate 10 which is disposed opposite the side-plate 5.
The ventilator of the motor 1 is designed to regulate the temperature of the cooling fluid circulating in the radiator of the associated internal combustion engine. To enable this to be done, an electronic control device is provided which, in dependence upon signals provided by a temperature pick-up, causes the electric motor 1 to be stopped or started and/or enables the speed of the motor to be adjusted as a function of the temperature measured by the pick-up. The temperature pick-up may be mounted on, for example, the heat-exchanger associated with the fan motor so as to measure the temperature of the cooling fluid.
Electronic control devices of the type indicated above usually comprise at least one power transistor associated with a radiator, as well as other electronic components interconnected by printed-circuit connexions provided on an insulating carrier. In the illustrated embodiment, the side-plate 5 of the motor 1 forms the radiator of the power transistor 11, whereas the printed circuit and the electronic components 14 of the control device are carried by the brush-holder plate 10.
A dished portion 12 is formed in the outer face of the side-plate 5. The power transistor 11 is housed within this dished portion. Over approximately onehalf of its outer wall in which the dished portion 12 is formed, the side-plate has substantially parallel cooling fins 13; the depth of the cooling fins 13 is substantially equal to the depth of the dished portion 12.
The side-plate 5 is made of a metal normally used for making the side-plates of electric motors, for example, cast aluminium. Between the base of the dished portion 12 and the power transistor 11 is interposed a thin layer of electrically insulating material, for example, mica.
On that face the brush-holder plate 10 that is located opposite the side-plate 5 are placed other components of the electronic control device, as well as the connexions of the printed circuit. In a conventional manner, the conductors of the components 14 are threaded through holes provided for this purpose in th brush-holder plate 10, an the junctions between the conductors of the components 14 and the printed circuit connexions are formed by a standard submerged-arc welding process.
This submerged-arc welding operation is also used for attaching to the brush-holder plate 10 a removable connecting member which joins the three conductors of the power transistor to the connexions of the printed circuit provided on th brush-holder plate 10. In known manner, such connecting member conprises a base 15 of plastics material secured to the plate 10 by means of four short lengths of conductive metal which extend through the plate and are welded to the connexions of the printed circuit as well as to the electronic component 14.
Projecting from the base 15 are two clips 16 and two cross-pieces 20; screws 17 for securing the power transistor 11 to the side-plate 15 extend through these cross-pieces. One of the two screws 17 also fulfils the function of providing one of the three electrical connexions between the power transistor 11 and the connexions of the printed circuit; the two other electrical connexions are established by resiliently engaging the two conductors 18 of the power transistor 11 within the two clips 16.
The removable connexion provided between the power transistor 11 and the other components of the control device facilitate the operations of fitting and removing the electric motor 1; after fitting the brush-holder plate 10 in the same manner as that used for a brush holder of the known type, followed by positioning and clamping of the side-plate 5, the power transistor 11 is introduced into the dished portion 12 where it is secured by means of the two screws 17; at the same time, the two conductors 18 of th power transistor 11 become resiliently engaged in the two clips 16 of the connecting member, and this has the effect of electrically uniting the power transistor 11 with the connexions of the printed circuit and the electronic components 14 of the brush-holder plate.
It wil be understood that the above-described embodiment is in no way limiting and that it can be modified in any required manner without thereby departing from the framework of the present invention.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7819938A FR2430686B1 (en) | 1978-07-04 | 1978-07-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2028006A true GB2028006A (en) | 1980-02-27 |
| GB2028006B GB2028006B (en) | 1983-04-27 |
Family
ID=9210319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7923247A Expired GB2028006B (en) | 1978-07-04 | 1979-07-04 | Electric motors |
Country Status (3)
| Country | Link |
|---|---|
| ES (1) | ES482197A1 (en) |
| FR (1) | FR2430686B1 (en) |
| GB (1) | GB2028006B (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2167608A (en) * | 1984-11-23 | 1986-05-29 | Wolfgang Rosch | Electrical lift drive |
| EP0252481A3 (en) * | 1986-07-07 | 1988-08-24 | Mitsuba Electric Mfg. Co., Ltd. | Electric motor system for automobiles |
| GB2251522A (en) * | 1990-12-07 | 1992-07-08 | Ist Lab Ltd | An electric motor |
| FR2753848A1 (en) * | 1996-09-26 | 1998-03-27 | Valeo Electronique | Electric motor with integrated electronic control |
| EP0984551A2 (en) * | 1998-09-04 | 2000-03-08 | Semar S.r.l. | Speed variator brush-holder for direct-current motors |
| WO2000051863A1 (en) * | 1999-03-02 | 2000-09-08 | Siemens Aktiengesellschaft | Motor-drive assembly, especially a motor-pump assembly for an anti-blocking brake device of an automobile |
| GB2356979A (en) * | 1999-10-18 | 2001-06-06 | Gate Spa | Power switch on brush-holder unit |
| EP1116319A1 (en) * | 1998-06-30 | 2001-07-18 | General Electric Company | Motor endshield assembly for an electronically commutated motor |
| WO2001073926A1 (en) * | 2000-03-27 | 2001-10-04 | Robert Bosch Gmbh | Electromotor with large-scale integrated electronics on the brush holder |
| WO2002021667A1 (en) * | 2000-09-07 | 2002-03-14 | Stribel Gmbh | Electric drive system |
| US7199496B2 (en) * | 2005-01-18 | 2007-04-03 | Oriental Motor Boston Technology Group Incorporated | Integrated electric motor and drive, optimized for high-temperature operation |
| WO2018059921A1 (en) * | 2016-09-30 | 2018-04-05 | Siemens Aktiengesellschaft | Motor for a circuit breaker drive, and use thereof |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR910004034B1 (en) * | 1986-09-18 | 1991-06-22 | 미쓰비시전기 주식회사 | Cruise control apparatus |
| DE4315404A1 (en) * | 1993-05-08 | 1994-11-10 | Bosch Gmbh Robert | Electric-motor drive for displacing equipment parts of a motor vehicle |
| FR2728116B1 (en) * | 1994-12-12 | 1997-02-07 | ||
| FR2766301B1 (en) | 1997-07-17 | 1999-09-10 | Valeo Climatisation | Electric motor, especially for motor vehicles, with improved cooling radiator |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1348200A (en) * | 1963-02-20 | 1964-01-04 | Lucas Industries Ltd | electric current generator |
| DE1234839B (en) * | 1963-08-22 | 1967-02-23 | Adam Baumueller G M B H | AC motor with spring pressure brake and rectifier |
| US3356873A (en) * | 1965-11-12 | 1967-12-05 | Baldor Electric Co | Dc motor with rectifiers mounted in the end bell |
| US3573516A (en) * | 1969-04-23 | 1971-04-06 | Gen Electric | Rectifier bridge for use with an alternator |
| GB1333787A (en) * | 1970-11-03 | 1973-10-17 | Nippon Denso Co | Alternators |
| GB1400437A (en) * | 1971-11-06 | 1975-07-16 | Lucas Electrical Co Ltd | Alternator |
| DE2309998B2 (en) * | 1973-02-28 | 1978-08-10 | Siemens Ag, 1000 Berlin Und 8000 Muenchen |
-
1978
- 1978-07-04 FR FR7819938A patent/FR2430686B1/fr not_active Expired
-
1979
- 1979-07-04 GB GB7923247A patent/GB2028006B/en not_active Expired
- 1979-07-04 ES ES482197A patent/ES482197A1/en not_active Expired
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2167608A (en) * | 1984-11-23 | 1986-05-29 | Wolfgang Rosch | Electrical lift drive |
| EP0252481A3 (en) * | 1986-07-07 | 1988-08-24 | Mitsuba Electric Mfg. Co., Ltd. | Electric motor system for automobiles |
| GB2251522A (en) * | 1990-12-07 | 1992-07-08 | Ist Lab Ltd | An electric motor |
| FR2753848A1 (en) * | 1996-09-26 | 1998-03-27 | Valeo Electronique | Electric motor with integrated electronic control |
| US6031306A (en) * | 1996-09-26 | 2000-02-29 | Valeo Electronique | Electric motor incorporating its own electronic control |
| EP1116319A1 (en) * | 1998-06-30 | 2001-07-18 | General Electric Company | Motor endshield assembly for an electronically commutated motor |
| EP1116319A4 (en) * | 1998-06-30 | 2005-04-13 | Gen Electric | Motor endshield assembly for an electronically commutated motor |
| EP0984551A2 (en) * | 1998-09-04 | 2000-03-08 | Semar S.r.l. | Speed variator brush-holder for direct-current motors |
| EP0984551A3 (en) * | 1998-09-04 | 2001-03-07 | Semar S.r.l. | Speed variator brush-holder for direct-current motors |
| WO2000051863A1 (en) * | 1999-03-02 | 2000-09-08 | Siemens Aktiengesellschaft | Motor-drive assembly, especially a motor-pump assembly for an anti-blocking brake device of an automobile |
| GB2356979B (en) * | 1999-10-18 | 2004-06-02 | Gate Spa | Brush-holder unit |
| GB2356979A (en) * | 1999-10-18 | 2001-06-06 | Gate Spa | Power switch on brush-holder unit |
| WO2001073926A1 (en) * | 2000-03-27 | 2001-10-04 | Robert Bosch Gmbh | Electromotor with large-scale integrated electronics on the brush holder |
| JP2004508797A (en) * | 2000-09-07 | 2004-03-18 | アーエフエル ジャーマニー エレクトロニクス ゲゼルシャフト ミット ベシュレンクテル ハフツング | Electric drive |
| WO2002021667A1 (en) * | 2000-09-07 | 2002-03-14 | Stribel Gmbh | Electric drive system |
| US7199496B2 (en) * | 2005-01-18 | 2007-04-03 | Oriental Motor Boston Technology Group Incorporated | Integrated electric motor and drive, optimized for high-temperature operation |
| WO2018059921A1 (en) * | 2016-09-30 | 2018-04-05 | Siemens Aktiengesellschaft | Motor for a circuit breaker drive, and use thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| ES482197A1 (en) | 1980-04-01 |
| FR2430686A1 (en) | 1980-02-01 |
| FR2430686B1 (en) | 1982-03-05 |
| GB2028006B (en) | 1983-04-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) |