DE102008000124A1 - Compressor, particularly electric motor propelled compressor, has electric motor which has stator and rotor, where stator is provided with stator connection plate - Google Patents

Abstract

The compressor (1) has an electric motor (2) which has a stator (4) and a rotor (6), where the stator is provided with a stator connection plate. The stator connection plate is pointed in a housing inner side (2.2) of a motor housing (2.1) and the plug contact sleeves have a control circuit (7) placed at a housing outer side (2.3) of the motor housing. The plug contact sleeves stand in contact with together complementary with electrically conductive plug contact pins by formation of an axial play, where the plug contact pins penetrate the motor housing.

Description

The The invention relates to a compressor, in particular an electric motor driven compressor according to the preamble of claim 1

such Compressors are used for example in stationary Refrigeration systems or in vehicle air conditioning systems.

Electromotive driven compressors usually consist of a Compressor engine, an electric drive motor and a Control electronics, which are functional and for reasons the space reduction made together as a compact unit are. However, the manufacturing process of these compressors is very Complex and time-consuming, as components are installed on a narrow mounting space different functions electrically and / or mechanically connect and assemblies are electrically isolated from each other and hermetic must be sealed.

Especially the electrical connection between the stator coils of the drive motor and the control electronics requires a high assembly cost, which with additional assembly steps, such as soldering, Welding or the placement of sealing elements, goes along.

From the DE 102 15 207 A1 a motor-driven compressor is previously known, which comprises a motor and a compression section for compressing a refrigerant. The compressor has an input port for the engine and a driver circuit for controlling the engine. The input port of the engine extends through an opening formed in a wall of a refrigerant path, whereby the input port is fixed to the wall and extends beyond the wall. The driver circuit controls the speed of the motor and has an output connection means. The output connection means of the driver circuit is connected directly to the input terminal to fix the driver circuit to the wall. This direct connection eliminates the need for a wire connection between the output connection means and the input terminal. A disadvantage of this invention, however, is that the output connection means are secured using additional screws to the inverter of the driver circuit.

From the DE 102 51 219 A1 Further, a motor-driven compressor with a housing is shown, wherein the housing has a compression portion for compressing a refrigerant, a motor for driving the compression portion and a drive circuit for controlling the motor. A connecting member having a plate-like shape is disposed at one end of the engine. The connecting component in this case connects a plurality of coils of the motor with the drive circuit. A particular disadvantage of this invention is that for connection of the connecting component additional components, such as engagement members and pins are needed.

In the DE 10 2004 015 826 A1 an engine compressor is disclosed. The engine compressor comprises an electric motor for driving a compression device and a motor housing provided for receiving the motor. In addition, a drive circuit board placed at the outside of the motor housing is provided with a motor drive circuit and an input terminal passed through the motor housing for inputting drive power to the motor. Characteristic of this invention is that the input terminal and the output terminal are directly engaged with each other and electrically connected to each other. A particular disadvantage of this invention is that the placement of the wires on the motor side takes place directly on the inner projection of the input terminal.

all The above inventions is immanent that the drive motor with an external stator and an internal rotor trained rotor is formed. The outside one Stator design has large coils on what on the one hand requires a higher material usage and on the other hand associated with a higher weight of the coils. The greater length of the coil wires leads in addition to a higher electrical resistance and to higher ohmic losses of the stator.

The The object of the invention is now a compressor, in particular an electric motor driven compressor to suggest which is more efficient and in terms of connection between the control circuit and the stator of the electric motor easier to be finished.

This invention is achieved by a compressor, in particular an electric motor-driven compressor, comprising at least one compressor engine for sucking and compressing a refrigerant, an electric motor placed in a motor housing for driving the compressor engine and a control circuit for the electric motor. According to the invention, the electric motor consists of a stator with stator connection plate and a rotor, wherein the facing to the inside of the motor housing Stator Anschlußplat te as well as the placed on the outside of the motor housing control circuit each have plug contact sleeves, which engage with complementary, the motor housing penetrating, electrically conductive plug contact pins to form an axial play with each other.

Preferably In this case, the stator is designed as an internal stator, which from the rotor designed as an external rotor, preferably ring-shaped, surrounded.

Of the The essential advantage of the present invention is that the assembly of the compressor is much easier, as a electrically conductive connection between the coil wires of the stator and the control circuit of the motor by a simple mechanical assembly of the plug contact sleeves the stator connection plate and the plug contact sleeves of Control circuit with the two sides of the motor housing protruding plug contact pins can be made. One Soldering or welding of the electrical components is no longer necessary. Regarding the electric Connection between the plug contact sleeves of the stator connection plate and the plug pins of the motor housing must also no additional sealing elements are mounted.

To the Purposes of adequate electrical insulation and hermetic Sealing the inside of the motor housing placed Plug contact pins are preferably glass tubes or other electrically non-conductive sleeves used.

Thereby, that the stator preferably inside, respectively as an internal rotor, is formed, this can be made without large coils be, with the shorter length of the coil wires advantageously to a lower electrical resistance and ultimately leads to a lower ohmic power dissipation.

Of the the stator is annular surrounding rotor from a magnetic ring and a bell-shaped magnetic Conversion ring constructed. The advantage here is in that the rotor is easier to manufacture, with the Magnetic ring without additional cost with a higher number of poles as 6, z. B. 10, can be provided. As a result, the magnetic return ring can be reduced in its thickness.

to Reduction of the Nutungsmoments, the electric motor with a broken-key groove / pole ratio, for example with 12 slots of the stator and 10 poles of the rotor, are formed. This allows very good synchronization characteristics of the engine be achieved. A further improvement of the synchronization of the engine could be achieved by designing the rotor as an external rotor is, compared with one trained as an internal rotor Rotor has a higher moment of inertia.

The Plug contact pins are preferably so through the motor housing led that thereby the half-bridge to the circuit the respective phase spatially close to the respective plug contact pin is positioned for this phase. Through this spatial Near are the electromagnetic radiation of the half-bridge circuit and - due to the short connection - also reduces the ohmic power loss.

The Stator connection plate according to the invention comprises several electrically conductive areas that are spatially related are arranged. For the production of such a stator connection plate a punched grid is preferably used, which is electrically has conductive and separated areas. Furthermore, each of these areas preferably has one or more openings on, in which plug contact sleeves are placed. Alternatively, you can the shape of the plug contact sleeves also in the context of Punching the stator connection plate done so that the plug contact sleeves forms an integral part of the stator connection plate. The plug contact sleeves the stator connection plate are either at an angle of 120 ° or placed at an angle of 60 ° to each other.

The Connection between the ends of the coil wires of the stator and the stator terminal plate can through a insulation displacement connection, through Welding or by soldering done.

The Coil wires of the stator can be so with the Stator terminal plate be connected, that preferably a star point the three phase windings arises. The idea of the invention is also not contrary, if the coil more than three phase windings having.

at Another preferred embodiment of the invention are two or more parallel wound coil wires of the stator by at least one insulation displacement connection with the stator connection plate connected.

The mentioned control circuit is usually formed as a one-piece or multi-part printed circuit board, wherein for the purpose of a functional separation in practice, two of these printed circuit boards, namely a power board and a control board, are used. The control circuit has as well as the stator terminal plate on plug contact sleeves, which are placed or formed in corresponding openings of the circuit board. The plug contact sleeve sen in turn are electrically connected to the circuit board.

The Plug contact pins and the complementary plug contact sleeves are completely made of an electrically good conductive Material, for example made of copper, or are made with a Surface coating made of silver. The cross section the plug contact pins is preferably round.

Of the The compressor according to the invention can be used both in stationary Plants, such as refrigeration systems, or in vehicle air conditioning systems be used.

• • einfache Montagemöglichkeit des Kompressors, respektive die elektrische Verbindung zwischen der Steuereinheit und der Stator-Anschlussplatte ohne Schrauben durch Verwendung von Steckkontakthülsen und komplementären Steckkontaktstiften,
• • Ausbildung einer betriebssicheren elektrischen Verbindung zwischen den stromführenden Bauteilen durch Flächenkontakt der zu verbindenden Bauteile,
• • der innenliegende Stator kann kostengünstig ohne raumgreifende Spulen gefertigt werden, was zusätzlich zur Verringerung des elektrischen Widerstandes und der ohmschen Verlustleistung führt,
• • der Magnetring des Rotors kann besonders einfach gefertigt werden, wodurch dieser ohne Kostenmehraufwand mit einer höheren Polzahl bestückt werden kann und
• • unter Verwendung eines gebrochenzahligen Nut/Pol-Verhältnises kann das Nutungsmoment reduziert und die Gleichlaufeigenschaften des Elektromotors gleichzeitig erhöht werden.

The significant advantages and features of the invention over the prior art are essentially:

• Simple installation possibility of the compressor, respectively the electrical connection between the control unit and the stator connection plate without screws by using plug contact sleeves and complementary plug contact pins,
• Formation of a reliable electrical connection between the live components by surface contact of the components to be connected,
• • The internal stator can be manufactured inexpensively without bulky coils, which in addition leads to a reduction of the electrical resistance and the ohmic power loss,
• • The magnetic ring of the rotor can be made very simple, so this can be equipped with no cost overhead with a higher number of poles, and
• • using a fractional groove / pole ratio, the grooving torque can be reduced and the synchronous characteristics of the electric motor can be increased simultaneously.

The Objects and advantages of this invention are after careful Study the following detailed description of the preferred, non-limiting example embodiments herein to better understand the invention with the accompanying drawings and to evaluate, of which show:

1 : Sectional view of the compressor,

2 : perspective view of the stator of the electric motor,

3 : perspective view of the stator of the electric motor and the control circuit and

4 : perspective detail of the stator connection plate.

The 1 illustrates a perspective sectional view of a compressor according to the invention 1 , which as essential components one in a housing 2.1 placed electric motor 2 and one by means of one in a radial bearing 11 stored wave 12 through this powered compressor engine 3 includes. The trained as an external rotor rotor 6 of the electric motor 2 consists of a magnetic ring 6.1 and a bell-shaped magnetic return ring 6.2 , The stator 4 of the electric motor 2 is here formed internally. On the outside 2.3 of the housing 2.1 of the electric motor 2 is a control circuit 7 arranged, which is a power board 7.1 and a control board 7.2 includes. This control circuit 7 serves to drive and control the electric motor 2 and thus to drive the compressor engine 3 , The control circuit 7 has several, preferably three, in the 3 shown plug contact sleeves 8th on, in engagement with complementary, the housing 2.1 of the electric motor 2 penetrating plug contact pins 10 stand.

The 2 shows a perspective view of the stator 4 of the electric motor 2 , As can be seen, is on a front side of the stator 4 of the electric motor 2 designed as a stamped grid stator connection plate 5 placed, the three plug contact sleeves 9 and three coupling points 5.2 for connecting the phases of the stator 4 includes. The plug contact sleeves 9 grab as well as the plug contact sleeves 8th the control circuit 7 in the housing 2.1 of the electric motor 2 penetrating plug pins 10 according to 3 one. The plug contact sleeves 9 the stator connection plate are encapsulated with a plastic. A detailed view of the stator connection plate 5 is the 4 refer to.

Of the 3 is a perspective view of the stator 4 of the electric motor 2 and the control circuit 7 to be removed in the assembled state. The electrical connection between the control circuit 7 , respectively the power board 7.1 and the control board 7.2 , and the phases of the electric motor 2 done by the on the control circuit 7 placed plug contact sleeves 8th about the housing 2.1 of the electric motor 2 penetrating and sealed there plug-in pins 10 up to the plug contact sleeves 9 the stator connection plate 5 , The plug contact sleeves 8th the control circuit 7 are electrically connected to those on the control circuit 7 placed, but not shown interconnects and (semiconductor) switching elements connected. Using the on the stator connection plate 5 arranged coupling points 5.2 An electrical connection is made to the phase windings of the stator 4 of the electric motor 2 ,

The 4 shows a detailed perspective view of the on the inside 2.2 of the hous ses 2.1 of the electric motor 2 facing end face of the stator 4 attached stator connection plate 5 , The stator connection plate 5 is formed as a substantially annular and electrically conductive stamped grid and has three at an angle of 120 ° to each other arranged plug contact sleeves 9 on each of which a coupling point 5.2 for the phase connection in each case one phase of the stator 4 assigned. The coupling points 5.2 extend parallel to the longitudinal extent of the plug contact sleeves 9 the stator connection plate 5 and have a slot at their end portions 5.3 as a lock for the coil wires of the stator 4 on. In addition, the stator connection plate includes 5 three at a angle of 120 ° to each other arranged star terminals 5.1 , which are interconnected in a star connection, respectively, electrically connected to each other. The star connections 5.1 and the coupling points 5.2 in the example shown down, while the plug contact sleeves 9 the stator connection plate 5 pointing upwards. In the assembled state of the stator connection plate 5 extend the plug contact sleeves 9 towards the inside 2.2 of the housing 2.1 of the electric motor 2 and stand with the in the 3 shown plug contact pins 10 of the housing 2.1 of the electric motor 2 engaged. The star connections 5.1 and the plug contact sleeves 9 the stator connection plate 5 are alternating on the stator connection plate 5 arranged, in an angular distance of 60 ° to each other. The stator connection plate may be contrary to the illustration 4 also be encapsulated with a plastic, with the star connections 5.1 , the coupling points 5.2 and the plug contact sleeves 9 the stator connection plate 5 remain electrically conductive.

1

compressor

2

electric motor

2.1

motor housing

2.2

inside of the housing

2.3

outside of the housing

3

Compressor engine

4

stator

5

Stator connecting plate

5.1

star connection

5.2

coupling point

5.3

slot

6

rotor

6.1

magnetic ring

6.2

Return ring

7

control circuit

7.1

power board

7.2

control board

8th

Plug contact sleeve of the control circuit 7

9

Plug contact sleeve of the stator connection plate 5

10

Plug pin

11

radial bearings

12

wave

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 10215207 A1 [0005]
• - DE 10251219 A1 [0006]
• DE 102004015826 A1 [0007]

Claims (13)

Compressor ( 1 ), in particular an electric motor driven compressor ( 1 ), at least comprising a compressor engine ( 3 ) for sucking and compressing a refrigerant, one in a motor housing ( 2.1 ) placed electric motor ( 2 ) for driving the compressor engine ( 3 ) and a control circuit ( 7 ) for the electric motor ( 2 ), characterized in that the electric motor ( 2 ) from a stator ( 4 ) with stator connection plate ( 5 ) and a rotor ( 6 ), with the inside ( 2.2 ) of the motor housing ( 2.1 ) pointing stator connection plate ( 5 ) and those on the outside ( 2.3 ) of the motor housing ( 2.1 ) placed control circuit ( 7 ) each plug contact sleeves ( 8th . 9 ) with complementary, the motor housing ( 2.1 ) penetrating, electrically conductive plug contact pins ( 10 ) are engaged with each other to form an axial play. Compressor ( 1 ) according to claim 1, characterized in that the stator ( 4 ) as an internal stator ( 4 ) is formed, which of the rotor formed as an external rotor ( 6 ) is surrounded. Compressor ( 1 ) according to claim 1 or 2, characterized in that the plug contact pins ( 10 ) electrically isolated using glass sleeves and hermetically sealed by the motor housing ( 2.1 ) are guided. Compressor ( 1 ) according to one of claims 1 to 3, characterized in that the plug contact pins ( 10 ) so through the motor housing ( 2.1 ) are guided, that thereby the half-bridge to the circuit of the respective phase spatially close to the respective plug contact pin ( 10 ) is positioned for this phase. Compressor ( 1 ) according to one of claims 1 to 4, characterized in that the rotor ( 6 ) from a magnetic ring ( 6.1 ) and a bell-shaped magnetic return ring ( 6.2 ) is constructed. Compressor ( 1 ) according to claim 5, characterized in that the magnetic ring ( 6.1 ) has a number of poles equal to or greater than six. Compressor ( 1 ) according to one of claims 1 to 6, characterized in that for the purpose of reducing the Nutungsmoments the electric motor ( 2 ) has a fractional groove / pole ratio. Compressor ( 1 ) according to one of claims 1 to 7, characterized in that the stator connection plate ( 5 ) is formed as a substantially annular formed stamped grid. Compressor ( 1 ) according to one of claims 1 to 8, characterized in that the plug contact sleeves ( 9 ) of the stator connection plate ( 5 ) are placed either at an angle of 120 ° or at an angle of 60 ° to each other. Compressor ( 1 ) according to one of claims 1 to 9, characterized in that the stator connection plate ( 5 ) comprises a plurality of electrically conductive regions, which are arranged spatially to each other. Compressor ( 1 ) according to one of claims 1 to 10, characterized in that the connection between the coil wires of the stator ( 4 ) and the stator connection plate ( 5 ) is designed as insulation displacement connection. Compressor ( 1 ) according to one of claims 1 to 11, characterized in that the coil wires of the stator ( 4 ) in such a way with the stator connection plate ( 5 ) are connected, that a star point of the three phase windings arises. Compressor ( 1 ) according to one of claims 1 to 12, characterized in that two or more parallel wound coil wires of the stator ( 4 ) by at least one insulation displacement connection with the stator connection plate ( 5 ) are connected.