HU0204172A2 - Electric drive system - Google Patents

Electric drive system Download PDF

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Publication number
HU0204172A2
HU0204172A2 HU0204172A HU0204172A HU0204172A2 HU 0204172 A2 HU0204172 A2 HU 0204172A2 HU 0204172 A HU0204172 A HU 0204172A HU 0204172 A HU0204172 A HU 0204172A HU 0204172 A2 HU0204172 A2 HU 0204172A2
Authority
HU
Hungary
Prior art keywords
circuit board
electric drive
drive arrangement
fan
control unit
Prior art date
Application number
HU0204172A
Other languages
Hungarian (hu)
Inventor
Matthias Gold
Dirk Herke
Frank Hoenig
Original Assignee
Afl Germany Electronics Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to DE10044065A priority Critical patent/DE10044065A1/en
Application filed by Afl Germany Electronics Gmbh filed Critical Afl Germany Electronics Gmbh
Priority to PCT/EP2001/009920 priority patent/WO2002021667A1/en
Publication of HU0204172A2 publication Critical patent/HU0204172A2/en

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K5/00Casings; Enclosures; Supports
    • H02K5/04Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/14Means for supporting or protecting brushes or brush holders
    • H02K5/143Means for supporting or protecting brushes or brush holders for cooperation with commutators
    • H02K5/148Slidably supported brushes
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K11/00Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30Structural association with control circuits or drive circuits
    • H02K11/33Drive circuits, e.g. power electronics
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K9/00Arrangements for cooling or ventilating
    • H02K9/02Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K9/00Arrangements for cooling or ventilating
    • H02K9/28Cooling of commutators, slip-rings, or brushes, e.g. by ventilating

Abstract

Field of the Invention The present invention relates to an electric drive arrangement especially for a motor fan, which drive arrangement (30) is driven by an electric drive motor (14) and a drive motor (14) with a servo-electronic control unit (16), wherein the drive motor (14) is commutator (70) and slider (70) sliding on the commutator (70). the control unit (16) is provided with a circuit board (50). It is an object of the present invention that the drive motor (14) and the control unit (16) are arranged in a common housing (18) and the current supply means are secured on the circuit board (50). The present invention relates to an electric fan equipped with a fan drive wheel (12) driven by an electric drive arrangement (30) according to the invention and a drive motor (30) driven by an electric drive arrangement (30). HE

Description

The present invention relates to an electric drive arrangement, in particular for a motor vehicle fan, comprising an electric drive motor and an electronic control unit for controlling the drive motor, wherein the drive motor comprises a commutator and current supply means slidably mounted on the commutator. The invention also relates to an electric fan, particularly for motor vehicles, which is provided with an electric drive arrangement of this kind and a drive motor driven by a fan impeller.

The electric drive arrangements of the type described above are particularly used in motor vehicles to drive electric fans which cooperate with the refrigerator unit of the vehicle. In this case, the drive motor is usually assembled with a fan impeller as a unit, while the control unit is connected to the drive motor via electrical connection cables and is located in a separate housing at a distance from the drive motor. The control unit provides power-controlled control of the drive motor, and for this purpose it is usually provided with an electronic power stage comprising at least one semiconductor switch, efficiently a FET power switch, and an electronic control unit for controlling the semiconductor switch. The electronic power stage and the electronic control unit are fixed on the circuit board as a common electronic unit. Such control units are known, for example, from DE 197 02 949 A1.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an electrical drive arrangement which is simpler and more cost-effective by further developing the electric drive arrangement described in the introduction.

In order to solve this problem, an electric drive arrangement is provided in which, according to the invention, the drive motor and the control unit are arranged in a common housing and the current supply means are mounted on the circuit board.

According to the invention, the control unit and the drive motor form a structural unit and for this purpose are arranged in a common housing. This type of compact arrangement requires significantly less space than conventional fan drive arrangements made up of several separate components. Furthermore, the structure according to the invention is distinguished by its excellent electromagnetic compatibility, since the electronic power stage of the control unit is arranged directly next to the drive motor and surrounded by the housing, which reliably prevents interfering electromagnetic radiation. The electric drive arrangement does not require a separate power supply line between the control unit and the drive motor. This power cord is the main cause of interfering electromagnetic radiation. In addition, handling of the electric drive arrangement is considerably simpler and, due to the design of the electric drive arrangement in the form of a single unit, the susceptibility to interference is significantly reduced.

The electric drive motor is designed as a commutator motor with a commutator. The commutator is normally mounted on the rotating part of the drive motor. Power supply means are slidably arranged on the commutator, which are fixed inside the housing according to the stationary part of the drive motor. According to the invention, the current supply means are mounted on a circuit board which carries the electronic part of the control unit. This allows for a particularly compact design and better conduction of heat generated in the current supply means, thereby reducing the temperature of the supply means and thereby significantly extending their service life.

A further advantage of the embodiment according to the invention is that the arrangement of the power supply means on the circuit board of the control unit, in particular, requires only a short connection between the electronic power stage of the control unit and the power supply means. This improves the efficiency of the entire system. In addition, the short link between the control unit and the power supply means results in improved electromagnetic compatibility by reducing the length of the power transmission and receiving interconnecting wires.

In addition, the electric drive arrangement according to the invention is distinguished by its lower manufacturing costs, since the power supply means do not require a separate support structure. In addition, the installation of the electric drive arrangement is simplified.

In a particularly preferred embodiment, the control unit comprises a heat sink which is in thermal communication with the current supply means. In this case, the heat sink not only serves to dissipate the heat generated by the electronic power stage of the control unit into the environment, but also provides cooling of the power supply means which are in thermal communication with the heat sink. This can be accomplished through its face, which rests on both the radiator and the current supply means.

Preferably, the heat sink comprises a plurality of heat sinks disposed within a vent opening of the housing as well as a support element on which the circuit board is mounted. If the electric drive arrangement is used particularly in a motor vehicle fan, the cooling air flow generated by the fan can be passed through the vent opening where the radiator cooling elements are mounted, which provides particularly efficient heat dissipation.

It is advantageous for the radiator bracket to encircle the circuit board in such a way as to provide particularly efficient heat dissipation.

Particularly space-saving design is advantageously achieved by:

-4 that the circuit board is arranged circumferentially around the motor shaft. In this case, it has proven to be particularly advantageous that the circuit board is substantially circular in shape.

In a particularly preferred embodiment of the electric drive arrangement according to the invention, the circuit board is formed together with the current supply means and the heat sink to form a self-contained unit. With such an arrangement the installation of the electric drive arrangement is considerably simplified, since it is only necessary to assemble the drive motor and the aforementioned assembly unit in one housing. In particular, this allows for the pre-assembly of the unit, which unit includes the circuit board with the electronic unit arranged therein, the current supply means and the heat sink.

It is preferable that the power supply means are designed as carbon brushes. Alternatively, the current supply means may be formed, for example, as brass wire cloth.

It has been found to be particularly advantageous that the carbon brushes are slidably mounted on a carbon brush holder which is mounted on the circuit board.

As mentioned above, the electric drive arrangement according to the invention is particularly applicable to an electric fan, preferably an electric fan for motor vehicles. In this case, the fan is provided with a fan impeller which is rotated by the drive motor. It has been found particularly advantageous here to provide a fan impeller for generating a cooling air current within the housing which acts on the circuit board and the current supply means mounted thereon.

For example, an arrangement may be provided in which the housing is provided with an air outlet and spaced apart from the fan impeller, wherein the fan impeller provides reduced pressure in the region of the air outlet and the air outlet to the air outlet. is created. The circuit board is preferably arranged adjacent to the air intake or air outlet with attached current supply means. In particular, the arrangement in the region of the air inlet has proved to be particularly advantageous in terms of good heat dissipation.

The invention will now be described in more detail below with reference to a preferred embodiment, with reference to the accompanying drawings, in which:

Figure 1 is a schematic sectional view of an electric fan for a vehicle with an electric drive arrangement, and

Figure 2 shows a self-contained structural assembly of an electric drive assembly comprising a heat sink, a fixed circuit board, and carbon brushes mounted on a circuit board.

Fig. 1 schematically shows an electric fan 10 which is particularly suitable for motor vehicles, wherein the fan 10 is arranged inside the engine compartment on the refrigerator unit so that the air flow generated by the fan 10 can be directed to the refrigerator unit. The electric fan 10 is provided with a fan impeller 12 and a drive motor 14, also known as a fan motor. In addition, an electronic control unit 16 is arranged which, together with the drive motor 14, is arranged in a substantially cylindrical housing 18. The housing 18 is provided with a front bearing cover 20 facing the fan impeller 12 and a rear bearing cover 22 facing the fan impeller 12, which closes the housing housing 24 which surrounds the control unit 16 and the drive motor 14 circumferentially. The front bearing cap 20 and the rear bearing cap 22 form a bearing for the motor shaft 26, wherein the motor shaft 26 protrudes from the front bearing cap 20 and defines the longitudinal axis 27 of the drive motor 14.

The drive motor 14 and the control unit 16, which are mounted together in the housing 18, form an electrical drive arrangement 30 in the form of a compact unit, by means of which the fan impeller 12 can be driven.

The fan impeller 12 is formed as an axial fan and is provided with a fan vessel 36 which engages the front bearing cover 20 of the housing 18 and which is substantially U-shaped and perpendicular to the longitudinal axis 27.

-6 includes a directed bottom wall 38 and a side wall 40 formed as a cylindrical jacket disposed in one piece with the bottom wall and coaxial with the longitudinal axis 27. The fan impeller 12 is provided with an outer ring 42 at a radial distance from the side wall 40. A plurality of radial fan blades 44 are disposed between the side wall 40 and the outer ring 42 in conventional manner.

Pointing towards the front bearing cap 20, a bushing 46 is formed on the bottom wall 38 of the fan vessel 36 through which the fan impeller 12 is pivotally connected to the drive motor 14 so that the fan impeller 12 is pivotally rotated about the longitudinal axis 27.

The power control of the drive motor 14 is provided by an electrical control unit 16 housed within the housing 18. As shown in particular in FIG. 2, the control unit 16 is provided with an annular circuit board 50 mounted within and parallel to the rear bearing cap 22 and arranged circumferentially around the motor shaft 26. The circuit board 50 is known per se and therefore carries, in a manner not illustrated in the drawing, an electronic unit comprising a plurality of electronic components which are mounted on the circuit board 50 and are electrically connected to one another via electrical guides. For the sake of clarity, electronic components are not shown in Figure 2. The control unit 16 typically includes an electronic control circuit for generating pulse width modulated control signals and a plurality of electronic power stages with FET limit switches, such as those described in DE 197 02 949 A1. The electronic components mounted on the circuit board 50 are connected to the supply voltage through the connecting wires 52 from the housing 18 and are connected to a control device, e.g.

The circuit board 20 is clamped inside the housing 18 through a metallic heat sink 24 mounted on the rear bearing cap 22 and provided with a plurality of rib-shaped heat sinks 56 and an annular bracket 80 surrounding the circuit board 50. The rib-shaped cooling elements 56 pass through an air inlet 58 formed adjacent to the rear bearing cap 22 and molded into the housing 24. Corresponding air outlet openings 60 are provided on the front bearing cap 20 so that cooling air stream 62 can be passed through the housing through the air inlet 54 and the air outlet 60.

A plurality of lamellae 63 disposed at right angles to the side wall 40 are provided at equal distances from one another on the inner side 41 of the side wall 40 of the fan vessel 36 towards the bushing 56 to provide cooling air flow 62. When the fan impeller 12 is rotated by the drive motor 14, the air inside the fan vessel 36 begins to rotate through lamellae 63 transverse to the direction of rotation of the fan impeller 12. As a result of this rotational motion, the air is subjected to a centrifugal force which moves the air obliquely outwards. Thus, within the fan vessel 36, a reduced pressure is created in the region of the air outlet openings 60 on the front bearing cap 20, which causes air to be drawn in through the air inlet 58. Inside the housing 18 of the electric drive arrangement 30, a cooling air stream 62 is thus generated which, starting from the air inlet 58, is initially directed radially with respect to the longitudinal axis 27 and forms a radial flow section adjacent to the circuit board 50. In the direction of the front bearing cap 20, the cooling air stream 62 then enters a substantially axially directed flow section and exits the housing 18 through an air outlet 60. FIG.

The rib-shaped cooling elements 56 of the heatsink 54 are disposed within the air inlet 58 so that a flow of cooling air 62 flows therethrough. This provides effective cooling of the heatsink 54 and the circuit board 50 attached thereto. In addition, effective cooling of the drive motor 14 is provided since it is affected by the cooling air stream 62 in substantially its entire longitudinal direction.

The drive motor 14 is designed as a commutator motor. The propulsion motor A14 normally comprises a stator 66 mounted on the housing 18 and a stator 20, 22 ···

-8 contains 68 rotors mounted on pivoting bearing caps. On the rotor 68, a commutator 70, shown only schematically in the figure, on which two current supply devices 72, 74 are slidably mounted, is normally mounted at the height of the circuit board 50. The latter are mounted on the circuit board 50. To this end, two carbon brush holders 76, 78 are mounted on the circuit board 50 and receive each carbon brush. The carbon brush holders 76, 78 here form a housing in which the current supply means 72, 74 formed as carbon brushes are movably secured to the commutator 70.

As shown in Figure 2, the circuit board 50 is circumferentially surrounded by an annular retainer 80 which is integrally connected to the rib-shaped cooling elements 56 and on which the circuit board 50 is mounted. The annular support member 80 forms part of the heat sink 54 and is located in close proximity to the carbon brush holders 76, 78. This provides optimum heat dissipation from the carbon brushes through the carbon brush holders 76, 78 and the circuit board 50 to the heat sink 54. As a result, the carbon brushes have a relatively low temperature during operation of the electric drive arrangement 30, which results in a significantly longer service life of the electric drive arrangement.

The carbon brushes forming the current supply means 72, 74 are connected to the electronic power stage of the control unit via brass guides (not shown) which are not known in the figure. Due to the arrangement of the carbon brushes on the circuit board 50, the electrical interconnecting wires may be very short, so that the electric drive arrangement 30 achieves an excellent overall efficiency, and the transmission and absorption of interfering electromagnetic radiation can be kept to a low value.

As shown in Figure 2, the heat sink 54 forms a unit that can be handled independently of the circuit board 50 and the carbon brushes by the associated carbon brush holders 76, 78, which simplifies the installation of the electric drive arrangement 30.

Claims (10)

  1. PATENT CLAIMS
    An electric drive arrangement, in particular for a motor vehicle fan, comprising an electric drive motor and an electronic control unit for controlling the drive motor, wherein the drive motor comprises a commutator and current supply means slidably mounted on the commutator, wherein the control unit is provided with (14) and the control unit (16) are arranged in a common housing (18) and the current supply means (72, 74) are mounted on the circuit board (50).
  2. Electrical drive arrangement according to claim 1, characterized in that the control unit (16) comprises a heat sink (54) which is in thermal communication with the current supply means (72, 74).
  3. An electric drive arrangement according to claim 2, characterized in that the heat sink (54) comprises a plurality of cooling elements (56) disposed on a vent opening (58) of the housing (18) and a support element (80) on which the circuit sheet (50) is fixed.
  4. The electric drive arrangement according to claim 3, characterized in that the support element (8) surrounds the circuit board (50) in the form of a ring.
  5. 5. An electrical drive arrangement according to any one of claims 1 to 4, characterized in that the circuit board (50) is arranged circumferentially around the motor shaft (26).
  6. An electric drive arrangement according to claim 5, characterized in that the circuit board (50) is substantially annular.
  7. 7. An electrical drive arrangement according to any one of claims 1 to 5, characterized in that the circuit board (50) is formed in a self-manageable assembly with the current supply means (72, 74) and the heat sink (54).
    * *
    - 108. An electric drive arrangement according to any one of claims 1 to 4, characterized in that the current supply means (72, 74) are designed as carbon brushes.
  8. An electric drive arrangement according to claim 8, characterized in that the carbon brushes are slidably mounted on a carbon brush holder (76, 78) which is mounted on the circuit board (50).
  9. 10. An electric fan especially for a motor vehicle according to claims 1-9. The electric drive assembly (30) according to any one of claims 1 to 7 and the fan impeller (12) which can be driven by the drive motor (14) of the electric drive assembly (30).
  10. An electric fan according to claim 10, characterized in that the fan impeller (12) generates a cooling air stream for contacting the circuit board (50) and the current supply means mounted therewith, passing through the housing of the electric drive arrangement.
HU0204172A 2000-09-07 2001-08-29 Electric drive system HU0204172A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE10044065A DE10044065A1 (en) 2000-09-07 2000-09-07 Electric drive
PCT/EP2001/009920 WO2002021667A1 (en) 2000-09-07 2001-08-29 Electric drive system

Publications (1)

Publication Number Publication Date
HU0204172A2 true HU0204172A2 (en) 2003-03-28

Family

ID=7655284

Family Applications (1)

Application Number Title Priority Date Filing Date
HU0204172A HU0204172A2 (en) 2000-09-07 2001-08-29 Electric drive system

Country Status (6)

Country Link
US (1) US20020185984A1 (en)
EP (1) EP1226644A1 (en)
JP (1) JP2004508797A (en)
DE (1) DE10044065A1 (en)
HU (1) HU0204172A2 (en)
WO (1) WO2002021667A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5026028B2 (en) * 2005-11-09 2012-09-12 アスモ株式会社 Motor and motor manufacturing method
DE102006058955B4 (en) * 2006-12-12 2014-07-24 DüRR DENTAL AG Suction device for dental, medical and industrial purposes
DE102008043033A1 (en) * 2008-10-22 2010-04-29 Hilti Aktiengesellschaft brush holder
DE102009015770A1 (en) * 2009-03-31 2010-10-14 Hkr Climatec Gmbh fan device
JP5561301B2 (en) * 2012-03-29 2014-07-30 株式会社デンソー Driving device and manufacturing method thereof
WO2015063924A1 (en) * 2013-10-31 2015-05-07 三菱電機株式会社 Vehicle rotating electric machine
JP6174626B2 (en) 2015-06-01 2017-08-02 ファナック株式会社 Motor driving apparatus and method capable of notifying flow abnormality of fluid flowing in heat sink
CN106160354A (en) * 2016-07-11 2016-11-23 北京理工大学 A kind of used in new energy vehicles electric machine controller being easily integrated coupling

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2430686B1 (en) * 1978-07-04 1982-03-05 Marchal Equip Auto
FR2753848B1 (en) * 1996-09-26 1998-12-11 Electric motor with integrated electronic control
FR2777136B1 (en) * 1998-04-06 2000-06-16 Valeo Systemes Dessuyage Electric motor block, especially for a motor vehicle, with integrated control electronics

Also Published As

Publication number Publication date
JP2004508797A (en) 2004-03-18
DE10044065A1 (en) 2002-04-04
WO2002021667A1 (en) 2002-03-14
US20020185984A1 (en) 2002-12-12
EP1226644A1 (en) 2002-07-31

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Legal Events

Date Code Title Description
GB9A Succession in title

Owner name: STRIBEL PRODUCTION GMBH, DE

Free format text: FORMER OWNER(S): AFL GERMANY ELECTRONICS GMBH, DE

FD9A Lapse of provisional protection due to non-payment of fees