EP1614208A1 - Brushless direct current motor (bldc motor) - Google Patents

Brushless direct current motor (bldc motor)

Info

Publication number
EP1614208A1
EP1614208A1 EP04716219A EP04716219A EP1614208A1 EP 1614208 A1 EP1614208 A1 EP 1614208A1 EP 04716219 A EP04716219 A EP 04716219A EP 04716219 A EP04716219 A EP 04716219A EP 1614208 A1 EP1614208 A1 EP 1614208A1
Authority
EP
European Patent Office
Prior art keywords
motor
plug
brushless
motor according
lead frame
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.)
Withdrawn
Application number
EP04716219A
Other languages
German (de)
French (fr)
Inventor
Jens Schäfer
Martin Steigerwald
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IHO Holding GmbH and Co KG
Original Assignee
INA Schaeffler KG
Schaeffler KG
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
Application filed by INA Schaeffler KG, Schaeffler KG filed Critical INA Schaeffler KG
Publication of EP1614208A1 publication Critical patent/EP1614208A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • H02K5/08—Insulating casings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
    • H02K29/08—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates, magneto-resistors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/02—Casings or enclosures characterised by the material thereof
    • 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
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • H02K5/225—Terminal boxes or connection arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports

Definitions

  • the invention relates to a BLDC motor, in particular according to the preamble of patent claim 1.
  • DE 100 18 728 A1 discloses a BLDC motor which has at least one cover for axially closing a motor housing of a BLDC motor and components such as current paths, plug contacts, Hall sensors and connections for the BLDC motor. These components are used for its electronic commutation.
  • BLDC motors usually have a circuit board on which the Hall sensors, which are used to detect their direction of rotation and speed, are soldered on. A connector is also provided, the connector contacts of which are connected to the Hall sensors and the phases of the BLDC motor. Due to the temperature limits of the board and solder, these BLDC motors are not suitable for use in the internal combustion engine compartment of a motor vehicle, since temperatures of up to 150 ° C prevail, to which the self-heating of the BLDC motor of at least 10 ° to 20 ° C must be added.
  • Object of the invention is not suitable for use in the internal combustion engine compartment of a motor vehicle, since temperatures of up to 150 ° C prevail, to which the self-heating of the BLDC motor of at least 10 ° to 20 ° C must be added.
  • the object of the invention is to create a BLDC motor which can withstand maximum temperatures of at least 170 ° C. and has a small axial space requirement and low manufacturing costs.
  • the plug module according to the invention and the extrusion-coated lead frame are made from sufficiently heat-resistant materials, temperature-related failures of the BLDC motor are eliminated. That means increased reliability and improved functionality of the same.
  • the assembly of the BLDC motor is simplified by the plug module, which replaces a circuit board and a cover, and the axial space requirement is reduced accordingly.
  • the lead frame on the plug side is designed as a plug contact for the BLDC motor and as another plug contact for Hall sensors and on the motor side as a connection for the phases as a BLDC motor and as another connection for the Hall sensors. Since the lead frame is formed in one piece with the plug contacts and the connections, the connections which are otherwise necessary are unnecessary, as a result of which the production outlay is reduced and the reliability is increased. The reliability of the connector module is also promoted by the fact that the Hall sensors are attached to the lead frame directly and preferably by welding. The welded connection has the advantage of high heat resistance compared to the soldered connection.
  • the position fixing of the plug module with respect to the motor housing which is required for the exact radial and rotational position of the Hall sensors, is achieved in that the same has a centering collar and a rotation fixation.
  • the stator must be centered and rotationally fixed in order to correspond to module.
  • the connections of the phases of the BLDC motor and dowel pins, dowel screws, dowel sleeves or a fixing lug, which engages in a corresponding counter-contour of the motor housing, can be used as rotational fixation.
  • the centering collar can also act as a sealing collar.
  • an O-ring is inserted into a radial groove in the motor housing; in the case of an axial seal, the axial bearing surface of the centering collar on the motor side serves as a sealing surface for an O-ring located in the motor housing.
  • the O-ring grooves can also be made radially or axially in the centering collar. In this case, the corresponding counter surfaces in the motor housing serve as sealing surfaces.
  • the extrusion coating of the lead frame is oil-tight.
  • the BLDC motor is usually protected against the ingress of oil from the adjustment gear by means of a shaft sealing ring. If such a seal is to be dispensed with, the lead frame must be overmolded in an oil-tight manner. This prevents the oil entering the BLDC motor from flowing out along the current paths via the plug contacts the environment arrives. In addition, there are no leakage currents between the current paths in this way.
  • the seal between the motor housing and the plug module is also made using O-rings, paper seals or liquid seals.
  • the lead frame can, however, also be plugged into the plug module, for example via bores in the lead frame and plastic pins on the plug module. However, it can also be injection molded on one side or only partially encapsulated if the engine is oil-tight.
  • the plug contacts are arranged in a plug which is molded onto the plug module.
  • the plug can be attached to the plug module both radially and axially or in a mixed form (radially axially).
  • the plug module can also be implemented with a cable outlet, the cable having a plug at its end.
  • Figure 1 is an interior view of a connector module
  • FIG. 2 shows a side view of the plug module according to FIG. 1;
  • FIG. 3 shows an external view of the plug module according to FIG. 1. Detailed description of the drawing
  • the connector module 1 shown in Figure 1 is made of heat-resistant plastic, with which a likewise heat-resistant lead frame is molded.
  • the lead frame serves as a current path and connects plug contacts 2 with connections 5 for phases of the stator of a brushless DC motor (BLDC motor), not shown.
  • BLDC motor brushless DC motor
  • the plug contacts 2, 3 and the connections 5, 6 are components of the lead frame.
  • the Hall sensors 4 and the other connections 6 are connected in a heat-resistant manner by welding.
  • the plug module 1 has a centering collar 7, which is used to center it relative to a motor housing of the BLDC motor, not shown.
  • the stator of the BLDC motor is also centered in this motor housing. Since the connector module 1 and the stator are also rotationally fixed relative to the motor housing, an exact rotational and radial position of the connections 5, 6 is guaranteed.
  • a bearing seat 8 is arranged coaxially to the centering collar 7, in which a motor bearing is pressed or glued.
  • the engine mount can also be overmolded in the installed position.
  • injection-molded or joined reinforcement rings are provided.
  • oil of the internal combustion engine can penetrate into the BLDC motor via this adjustment gear.
  • An oil-tight encapsulation of the lead frame prevents leakage currents between the current paths and prevents oil from escaping along the current paths via the plug contacts 2, 3.
  • a connector 10 shown in partial section in FIG. 1 is molded onto the connector module 1.
  • FIG. 2 shows a side view of the plug module 1, with the centering collar 7, the Hall sensors 4, the connections 5 and the plug 10. The low overall height of the plug module 1 can be seen.
  • FIG. 3 shows the external view of the plug module 1 with the three through holes 9 and the molded plug 10.

Abstract

The invention relates to an electronically commutated brushless direct current motor which comprises at least one cover for axially closing a motor housing. The aim of the invention is to provide a BLDC motor that can be safely operated at elevated operating temperatures. For this purpose, the cover is configured as a high-temperature synthetic plug-in module (1) and the current paths are configured as an extrusion-coated high-temperature pressed screen.

Description

Bezeichnung der Erfindung Name of the invention
Bürstenloser Gleichstrommotor (BLDC-Motor)Brushless DC motor (BLDC motor)
Beschreibungdescription
Gebiet der ErfindungField of the Invention
Die Erfindung betrifft einen BLDC-Motor, insbesondere nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a BLDC motor, in particular according to the preamble of patent claim 1.
Hintergrund der ErfindungBackground of the Invention
In der DE 100 18 728 A1 ist ein BLDC-Motor offenbart, der zumindest einen Deckel zum axialen Verschließen eines Motorgehäuses eines BLDC-Motors und Bauelemente wie Strombahnen, Steckerkontakte, Hallsensoren sowie Anschlüsse für den BLDC-Motor aufweist. Diese Bauelemente dienen zu dessen elektronischer Kommutierung.DE 100 18 728 A1 discloses a BLDC motor which has at least one cover for axially closing a motor housing of a BLDC motor and components such as current paths, plug contacts, Hall sensors and connections for the BLDC motor. These components are used for its electronic commutation.
Herkömmliche BLDC-Motoren besitzen in der Regel eine Platine, auf der die Hallsensoren, die zur Erkennung von dessen Drehrichtung und Drehzahl dienen, aufgelötet sind. Außerdem ist ein Stecker vorgesehen, dessen Steckerkontakte mit den Hallsensoren und den Phasen des BLDC-Motors verbunden sind. Aufgrund der Temperaturgrenzen von Platine und Lot sind diese BLDC- Motoren für den Einsatz im Verbrennungsmotorraum eines Kraftfahrzeugs nicht geeignet, da dort Temperaturen bis 150°C herrschen, denen die Eigenerwärmung des BLDC-Motors von mindestens 10° bis 20°C noch hinzuzurechnen ist. Aufgabe der ErfindungConventional BLDC motors usually have a circuit board on which the Hall sensors, which are used to detect their direction of rotation and speed, are soldered on. A connector is also provided, the connector contacts of which are connected to the Hall sensors and the phases of the BLDC motor. Due to the temperature limits of the board and solder, these BLDC motors are not suitable for use in the internal combustion engine compartment of a motor vehicle, since temperatures of up to 150 ° C prevail, to which the self-heating of the BLDC motor of at least 10 ° to 20 ° C must be added. Object of the invention
Der Erfindung liegt die Aufgabe zugrunde, einen BLDC-Motor zu schaffen, der maximalen Temperaturen von mindestens 170°C standhält sowie einen gerin- gen axialen Raumbedarf und einen geringen Fertigungsaufwand aufweist.The object of the invention is to create a BLDC motor which can withstand maximum temperatures of at least 170 ° C. and has a small axial space requirement and low manufacturing costs.
Zusammenfassung der ErfindungSummary of the invention
Die Aufgabe wird erfindungsgemäß gelöst durch die Merkmale des Patentan- Spruchs 1.The object is achieved according to the invention by the features of patent claim 1.
Da das erfindungsgemäße Steckermodul und das umspritzte Stanzgitter aus hinreichend wärmefesten Materialien hergestellt sind, entfallen temperaturbedingte Ausfälle des BLDC-Motors. Das bedeutet gesteigerte Zuverlässigkeit und verbesserte Funktion desselben.Since the plug module according to the invention and the extrusion-coated lead frame are made from sufficiently heat-resistant materials, temperature-related failures of the BLDC motor are eliminated. That means increased reliability and improved functionality of the same.
Die Montage des BLDC-Motors wird durch den Steckermodul, der eine Platine und einen Deckel ersetzt, vereinfacht und der axiale Platzbedarf entsprechend verringert.The assembly of the BLDC motor is simplified by the plug module, which replaces a circuit board and a cover, and the axial space requirement is reduced accordingly.
Es hat Fertigungsvorteile, dass das Stanzgitter auf der Steckerseite als Steckerkontakt für den BLDC-Motor und als anderer Steckerkontakt für Hallsensoren und auf der Motorseite als Anschluss für die Phasen als BLDC-Motors sowie als anderer Anschluss für die Hallsensoren ausgebildet ist. Da das Stanzgitter mit den Ste- ckerkontakten und den Anschlüssen einstückig ausgebildet ist, erübrigen sich die sonst erforderlichen Verbindungen, wodurch der Fertigungsaufwand verringert und die Zuverlässigkeit erhöht werden. Die Zuverlässigkeit des Steckermoduls wird auch dadurch gefördert, das die Hallsensoren auf den Stanzgitter direkt und vorzugsweise durch Schweißen befestigt sind. Die Schweißverbindung hat gegenüber der Lötverbindung den Vorteil hoher Warmfestigkeit.It has manufacturing advantages that the lead frame on the plug side is designed as a plug contact for the BLDC motor and as another plug contact for Hall sensors and on the motor side as a connection for the phases as a BLDC motor and as another connection for the Hall sensors. Since the lead frame is formed in one piece with the plug contacts and the connections, the connections which are otherwise necessary are unnecessary, as a result of which the production outlay is reduced and the reliability is increased. The reliability of the connector module is also promoted by the fact that the Hall sensors are attached to the lead frame directly and preferably by welding. The welded connection has the advantage of high heat resistance compared to the soldered connection.
Die für die exakte Radial- und Drehlage der Hallsensoren erforderliche Lagefixierung des Steckermoduls gegenüber dem Motorgehäuse wird dadurch erreicht, dass derselbe einen Zentrierbund und eine Drehfixierung aufweist. In gleicherweise muss der Stator zentriert und drehfixiert sein um mit dem Ste- ckermodul zu korrespondieren. Als Drehfixierung kommen die Anschlüsse der Phasen des BLDC-Motors und Passstifte, Passschrauben, Passhülsen oder eine Fixiernase in Frage, die in eine entsprechende Gegenkontur des Motorgehäuses eingreift.The position fixing of the plug module with respect to the motor housing, which is required for the exact radial and rotational position of the Hall sensors, is achieved in that the same has a centering collar and a rotation fixation. In the same way, the stator must be centered and rotationally fixed in order to correspond to module. The connections of the phases of the BLDC motor and dowel pins, dowel screws, dowel sleeves or a fixing lug, which engages in a corresponding counter-contour of the motor housing, can be used as rotational fixation.
Der Zentrierbund kann zugleich als Dichtbund fungieren. Für eine radiale Dichtung wird ein O-Ring in eine radiale Nut des Motorgehäuses eingelegt, bei a- xialer Dichtung dient die motorseitige axiale Anlagefläche des Zentrierbundes als Dichtfläche für einen im Motorgehäuse liegenden O-Ring. Alternativ können die O-Ringnuten auch in den Zentrierbund radial oder axial eingebracht werden. In diesem Fall dienen die entsprechenden Gegenflächen im Motorgehäuse als Dichtflächen.The centering collar can also act as a sealing collar. For a radial seal, an O-ring is inserted into a radial groove in the motor housing; in the case of an axial seal, the axial bearing surface of the centering collar on the motor side serves as a sealing surface for an O-ring located in the motor housing. Alternatively, the O-ring grooves can also be made radially or axially in the centering collar. In this case, the corresponding counter surfaces in the motor housing serve as sealing surfaces.
Schließlich können zwischen Motorgehäuse und Zentrierbund auch noch ande- re Dichtungen, wie zum Beispiel Papierdichtungen oder Flüssigdichtungen, verwendet werden.Finally, other seals, such as paper seals or liquid seals, can also be used between the motor housing and the centering collar.
Es hat Fertigungsvorteile, wenn im Steckermodul koaxial zum Zentrierbund ein Motorlager angeordnet ist, das umspritzt oder in einen Lagersitz eingepresst oder eingeklebt ist. Dadurch wird ebenfalls die axiale Baulänge des BLDC- Motors verringert.It has manufacturing advantages if a motor bearing is arranged in the plug module coaxially to the centering collar, which is overmoulded or pressed or glued into a bearing seat. This also reduces the axial length of the BLDC motor.
Von Vorteil ist auch, wenn Durchgangslöcher für Befestigungsschrauben des Steckermoduls einen umspritzten metallischen Verstärkungsring aufweisen. Dadurch wird verhindert, dass der Steckermodul unter den Schraubenköpfen der Befestigungsschrauben plastisch verformt wird.It is also advantageous if through-holes for fastening screws of the plug module have an encapsulated metallic reinforcement ring. This prevents the connector module from being plastically deformed under the screw heads of the fastening screws.
Eine vorteilhafte Weiterentwicklung der Erfindung besteht darin, dass die Um- spritzung des Stanzgitters öldicht ausgebildet ist. Üblicherweise wird der BLDC-Motor dort, wo die Motorwelle aus dem Motorgehäuse ragt, mittels Wel- lendichtrings gegen eindringendes Öl aus dem Verstellgetriebe geschützt. Soll auf eine solche Dichtung verzichtet werden, muss das Stanzgitter öldicht umspritzt werden. Dadurch wird verhindert, dass das in den BLDC-Motor eindringende Öl an den Strombahnen entlang über die Steckerkontakte nach außen in die Umgebung gelangt. Außerdem kommt es auf diese Weise nicht zu Kriechströmen zwischen den Strombahnen. Die Dichtung zwischen Motorgehäuse und Steckermodul erfolgt auch in diesem Fall über O-Ringe, Papierdichtungen oder flüssige Dichtungen. Das Stanzgitter kann aber auch an das Steckermo- dul gesteckt sein, beispielsweise über Bohrungen im Stanzgitter und Kunststoffzapfen am Steckermodul. Es kann aber auch einseitig angespritzt oder nur teilweise umspritzt werden, wenn der Motor öldicht ausgeführt ist.An advantageous further development of the invention is that the extrusion coating of the lead frame is oil-tight. Where the motor shaft protrudes from the motor housing, the BLDC motor is usually protected against the ingress of oil from the adjustment gear by means of a shaft sealing ring. If such a seal is to be dispensed with, the lead frame must be overmolded in an oil-tight manner. This prevents the oil entering the BLDC motor from flowing out along the current paths via the plug contacts the environment arrives. In addition, there are no leakage currents between the current paths in this way. In this case, the seal between the motor housing and the plug module is also made using O-rings, paper seals or liquid seals. The lead frame can, however, also be plugged into the plug module, for example via bores in the lead frame and plastic pins on the plug module. However, it can also be injection molded on one side or only partially encapsulated if the engine is oil-tight.
Zur Verminderung der Fertigungs- und Montagekosten trägt bei, daß die Ste- ckerkontakte in einem Stecker angeordnet sind der an dem Steckermodul angespritzt ist. Trotz der einstückigen Ausführung des Steckermoduls und des Steckers kann dieser den Kundenwünschen relativ einfach angepasst werden, da bei unveränderlichen Motorgehäuse nur der Steckermodul angepasst werden muss. Beispielsweise kann der Stecker sowohl radial als auch axial oder in einer Mischform (radial axial) am Steckermodul angebracht sein. Bei Bedarf kann der Steckermodul auch mit einem Kabelabgang verwirklicht werden, wobei das Kabel an seinem Ende einen Stecker aufweist.To reduce the production and assembly costs, the fact that the plug contacts are arranged in a plug which is molded onto the plug module. Despite the one-piece design of the connector module and the connector, it can be adapted relatively easily to customer requirements, since only the connector module has to be adapted in the case of a fixed motor housing. For example, the plug can be attached to the plug module both radially and axially or in a mixed form (radially axially). If necessary, the plug module can also be implemented with a cable outlet, the cable having a plug at its end.
Es ist vorteilhaft für die Zuverlässigkeit des Steckermoduls, wenn die Füße von bedrahteten Hallsensoren umspritzt oder auf andere Art und Weise mechanisch gestützt sind, da dieselben auf diese Weise fixiert und gegen Vibration geschützt sind.It is advantageous for the reliability of the plug module if the feet are encapsulated by wired Hall sensors or are mechanically supported in some other way, since they are fixed in this way and protected against vibration.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Weitere Merkmale der Erfindung ergeben sich aus der folgenden Beschreibung und denn Zeichnungen, in denen ein Ausführungsbeispiel der Erfindung schematisch dargestellt ist. Dabei zeigen:Further features of the invention will become apparent from the following description and drawings, in which an embodiment of the invention is shown schematically. Show:
Figur 1 eine Innenansicht eines Steckermoduls;Figure 1 is an interior view of a connector module;
Figur 2 eine Seitenansicht des Steckermoduls gemäß Figur 1 ;FIG. 2 shows a side view of the plug module according to FIG. 1;
Figur 3 eine Außensicht des Steckermoduls gemäß Figur 1. Ausführliche Beschreibung der Zeichnung3 shows an external view of the plug module according to FIG. 1. Detailed description of the drawing
Der in Figur 1 dargestellte Steckermodul 1 besteht aus warmfestem Kunststoff, mit dem ein ebenfalls warmfestes Stanzgitter umspritzt ist. Das Stanzgitter dient als Strombahn und verbindet Steckerkontakte 2 mit Anschlüssen 5 für Phasen des Stators eines nicht dargestellten bürstenlosen Gleichstrommotors (BLDC-Motor).The connector module 1 shown in Figure 1 is made of heat-resistant plastic, with which a likewise heat-resistant lead frame is molded. The lead frame serves as a current path and connects plug contacts 2 with connections 5 for phases of the stator of a brushless DC motor (BLDC motor), not shown.
Eine weitere Verbindung besteht zwischen anderen Steckkontakten 3 und nicht dargestellten anderen Anschlüssen 6 für Hallsensoren 4, die der elektronischen Kommutierung des BLDC-Motors dienen. Die Steckerkontakte 2, 3 und die Anschlüsse 5, 6 sind Bestandteile des Stanzgitters. Die Hallsensoren 4 und die anderen Anschlüsse 6 sind durch Schweißen warmfest verbunden.Another connection exists between other plug contacts 3 and other connections 6, not shown, for Hall sensors 4, which are used for the electronic commutation of the BLDC motor. The plug contacts 2, 3 and the connections 5, 6 are components of the lead frame. The Hall sensors 4 and the other connections 6 are connected in a heat-resistant manner by welding.
Der Steckermodul 1 besitzt einen Zentrierbund 7, der zu dessen Zentrierung gegenüber einem nicht dargestellten Motorgehäuse des BLDC-Motors dient. In diesem Motorgehäuse ist der Stator des BLDC-Motors ebenfalls zentriert angeordnet. Da der Steckermodul 1 und der Stator gegenüber dem Motorgehäu- se auch drehfixiert sind, ist eine exakte Dreh- und Radiallage der Anschlüsse 5, 6 gewährleistet.The plug module 1 has a centering collar 7, which is used to center it relative to a motor housing of the BLDC motor, not shown. The stator of the BLDC motor is also centered in this motor housing. Since the connector module 1 and the stator are also rotationally fixed relative to the motor housing, an exact rotational and radial position of the connections 5, 6 is guaranteed.
In dem Steckermodul 1 ist koaxial zu dem Zentrierbund 7 ein Lagersitz 8 angeordnet, in dem ein Motorlager eingepresst oder eingeklebt ist. Das Motorlager kann auch in Einbaulage umspritzt werden.In the plug module 1, a bearing seat 8 is arranged coaxially to the centering collar 7, in which a motor bearing is pressed or glued. The engine mount can also be overmolded in the installed position.
Zur Stabilisierung des Bereichs von Durchgangslöchern 9 gegen die Schraubenkraft von Befestigungsschrauben sind nicht dargestellte, umspritzte oder gefügte Verstärkungsringe vorgesehen. Durch Entfall der üblichen Abdichtung der Motorwelle gegenüber dem Verstellgetriebe kann über dieses Verstellgetriebe Öl des Verbrennungsmotors in den BLDC-Motor eindringen. Ein öldichtes Umspritzen des Stanzgitters verhindert, dass Kriechströme zwischen den Strombahnen entstehen und dass Öl entlang der Strombahnen über die Steckerkontakte 2, 3 nach außen gelangt. Ein in Figur 1 im Teilschnitt dargestellter Stecker 10 ist an den Steckermodul 1 angespritzt. Durch Wechseln des Steckermoduls 1 können andere Steckerformen verwirklicht werden ohne am BLDC-Motor eine Änderung vornehmen zu müssen.To stabilize the area of through holes 9 against the screw force of fastening screws, injection-molded or joined reinforcement rings, not shown, are provided. By eliminating the usual sealing of the motor shaft with respect to the adjustment gear, oil of the internal combustion engine can penetrate into the BLDC motor via this adjustment gear. An oil-tight encapsulation of the lead frame prevents leakage currents between the current paths and prevents oil from escaping along the current paths via the plug contacts 2, 3. A connector 10 shown in partial section in FIG. 1 is molded onto the connector module 1. By changing the connector module 1, other connector shapes can be implemented without having to make a change to the BLDC motor.
In Figur 2 ist eine Seitenansicht des Steckermoduls 1 dargestellt, mit dem Zentrierbund 7, den Hallsensoren 4, den Anschlüssen 5 und dem Stecker 10. Die geringe Bauhöhe des Steckermoduls 1 ist erkennbar.FIG. 2 shows a side view of the plug module 1, with the centering collar 7, the Hall sensors 4, the connections 5 and the plug 10. The low overall height of the plug module 1 can be seen.
Figur 3 zeigt die Außenansicht des Steckermoduls 1 mit den drei Durchgangslöchern 9 und dem angespritzten Stecker 10. FIG. 3 shows the external view of the plug module 1 with the three through holes 9 and the molded plug 10.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
Steckermodulplug module
Steckerkontakt anderer SteckerkontaktPlug contact other plug contact
HallsensorHall sensor
Anschluss anderer AnschlussConnection other connection
Zentrierbundspigot
Lagersitzbearing seat
DurchgangslochThrough Hole
Stecker plug

Claims

Patentansprüche claims
1. Bürstenloser Gleichstrommotor (BLDC-Motor) mit elektronischer Kommutierung und mit zumindest einem Deckel zum axialen Verschließen eines Motorgehäuses des BLDC-Motors, dadurch gekennzeichnet, dass der Deckel als ein aus warmfestem Kunststoff gespritzter Steckermodul (1 ) ausgebildet ist, der warmfeste Hallsensoren (4) und als Strombahnen ein warmfestes Stanzgitter aufweist.1. Brushless direct current motor (BLDC motor) with electronic commutation and with at least one cover for axially closing a motor housing of the BLDC motor, characterized in that the cover is designed as a plug module (1) molded from heat-resistant plastic, the heat-resistant Hall sensors ( 4) and has a heat-resistant lead frame as current paths.
2. Bürstenloser Gleichstrommotor nach Anspruch 1 , dadurch gekennzeichnet, dass das Stanzgitter an den Steckermodul (1 ) ansteckbar oder teilweise an- gespritzt beziehungsweise umspritzt ist.2. Brushless DC motor according to claim 1, characterized in that the lead frame can be plugged onto the plug module (1) or is partially molded or overmolded.
3. Bürstenloser Gleichstrommotor nach Anspruch 1 , dadurch gekennzeichnet, dass das Stanzgitter auf der Steckerseite als Steckerkontakt (2) für den Gleichstrommotor und als anderer Steckerkontakt (3) für die Hallsensoren (4) und auf der Motorseite als Anschluss (5) für die Phasen des BLDC-Motors sowie als anderer Anschluss (6) für die Hallsensoren (4) ausgebildet ist.3. Brushless DC motor according to claim 1, characterized in that the lead frame on the plug side as a plug contact (2) for the DC motor and as another plug contact (3) for the Hall sensors (4) and on the motor side as a connection (5) for the phases of the BLDC motor and as another connection (6) for the Hall sensors (4).
4. Bürstenloser Gleichstrommotor nach Anspruch 3, dadurch gekennzeichnet, dass die Hallsensoren (4) auf dem Stanzgitter direkt und vorzugsweise durch Schweißen befestigt sind.4. Brushless DC motor according to claim 3, characterized in that the Hall sensors (4) on the lead frame are attached directly and preferably by welding.
5. Bürstenloser Gleichstrommotor nach Anspruch 4, dadurch gekennzeichnet, dass der Steckermodul (1 ) einen Zentrierbund (7) und eine Drehfixierung aufweist.5. Brushless DC motor according to claim 4, characterized in that the plug module (1) has a centering collar (7) and a rotational fixation.
6. Bürstenloser Gleichstrommotor nach Anspruch 5, dadurch gekennzeichnet, dass im Steckermodul (1 ) koaxial zum Zentrierbund (7) ein Motorlager angeordnet ist, das umspritzt oder in einem Lagersitz (8) eingepresst oder eingeklebt ist. 6. Brushless DC motor according to claim 5, characterized in that in the plug module (1) coaxial to the centering collar (7) a motor bearing is arranged, which is molded or pressed or glued into a bearing seat (8).
7. Bürstenloser Gleichstrommotor nach Anspruch 6, dadurch gekennzeichnet, dass Durchgangslöcher (9) für Befestigungsschrauben des Steckermoduls (1) einen vorzugsweise metallischen Verstärkungsring aufweisen.7. Brushless DC motor according to claim 6, characterized in that through holes (9) for fastening screws of the plug module (1) have a preferably metallic reinforcing ring.
8. Bürstenloser Gleichstrommotor nach Anspruch 7, dadurch gekennzeichnet, dass die Umspritzung des Stanzgitters öldicht ausgebildet ist.8. Brushless DC motor according to claim 7, characterized in that the extrusion coating of the lead frame is oil-tight.
9. Bürstenloser Gleichstrommotor nach Anspruch 8, dadurch gekennzeichnet, dass die Steckerkontakte (2, 3) in einem Stecker (10) angeordnet sind, der an den Steckermodul (1 ) angespritzt ist.9. Brushless DC motor according to claim 8, characterized in that the plug contacts (2, 3) are arranged in a plug (10) which is molded onto the plug module (1).
10. Bürstenloser Gleichstrommotor nach Anspruch 9, dadurch gekennzeichnet, dass die Füße von bedrahteten Hallsensoren (4) vorzugsweise um- spritzt sind. 10. Brushless direct current motor according to claim 9, characterized in that the feet of wired Hall sensors (4) are preferably extrusion-coated.
EP04716219A 2003-04-08 2004-03-02 Brushless direct current motor (bldc motor) Withdrawn EP1614208A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003115871 DE10315871A1 (en) 2003-04-08 2003-04-08 Brushless DC motor (BLDC motor)
PCT/EP2004/002056 WO2004091072A1 (en) 2003-04-08 2004-03-02 Brushless direct current motor (bldc motor)

Publications (1)

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EP1614208A1 true EP1614208A1 (en) 2006-01-11

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EP04716219A Withdrawn EP1614208A1 (en) 2003-04-08 2004-03-02 Brushless direct current motor (bldc motor)

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EP (1) EP1614208A1 (en)
DE (1) DE10315871A1 (en)
WO (1) WO2004091072A1 (en)

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