FR3060237A1 - ELECTRICAL COMPRESSOR WITH IMPROVED SEALING SYSTEM - Google Patents

Abstract

The present invention relates to an electric compressor (1) comprising a compartment (8) electric motor in which is disposed an electric motor (5) and an assembly (9) comprising a electronic bus bar (92), the compartment (8) electric motor and the electronic assembly (9) being adjacent, the busbar (92) comprising at least one opening (93) allowing the passage of at least one element (52) for connection between the electric motor (5) and the assembly (9) electronic, characterized in that the aperture (93) in the form of a cone (94) whose apex is oriented towards the assembly (9) electronic.

Description

Holder (s): VALEO MOTOR CONTROL SYSTEMS Simplified joint-stock company.

Extension request (s)

Agent (s): VALEO ENGINE CONTROL SYSTEMS Simplified joint-stock company.

ELECTRIC COMPRESSOR WITH IMPROVED SEALING SYSTEM.

FR 3 060 237 - A1 \ M) The present invention relates to an electric compressor (1) comprising a compartment (8) electric motor in which is disposed an electric motor (5) and an electronic assembly (9) comprising a bus bar (92 ), the compartment (8) electric motor and the assembly (9) electronic being adjacent, the bus bar (92) comprising at least one opening (93) allowing the passage of at least one element (52) of connection between the electric motor (5) and the electronic assembly (9), characterized in that the opening (93) in the form of a cone (94) whose apex is oriented towards the electronic assembly (9).

ELECTRIC COMPRESSOR WITH SYSTEM

IMPROVED SEALING

The present invention relates to the field of electric compressors, and more particularly an electric supercharging compressor comprising an improved communication system between the electric motor and the electronic compartment.

In the context of the invention, an electric compressor is a device, used for supercharging a heat engine, operating with an electric motor. More specifically, the compressor comprises a compressor wheel driven by an electric motor. The operation of the compressor is controlled by an electronic assembly arranged in an electronic compartment.

The electric compressor is placed on the air intake line of an internal combustion engine, in addition for example to a turbocharger. The electric compressor plays the same role as the turbocharger, namely to increase the pressure of admission of the fresh gases into the engine, but is used in particular during transient phases to alleviate the problems of response time of the turbocharger.

A connection between the engine compartment and the electronic assembly of the electronic compartment is necessary to ensure the operation of the compressor. This connection requires a passage between the two compartments. The connection is long and thin and is difficult to position correctly. The object of the present invention is therefore to overcome one or more of the drawbacks of the devices of the prior art by proposing an electric compressor whose connection system between the engine compartment and the electronic compartment is improved and thus makes it possible to better position the connection.

For this, the present invention provides an electric compressor comprising an electric motor compartment in which is placed an electric motor and an electronic assembly comprising a bus bar, the electric motor compartment and the electronic assembly being adjacent, the bus bar comprising at least one opening. allowing the passage of at least one connection element between the electric motor and the electronic assembly, the opening having the shape of a cone whose apex is oriented towards the electronic assembly.

This type of opening makes it possible to correctly guide the connecting element 91 through the opening of the bus bar.

According to one embodiment of the invention, the compressor comprises between 1 and 15 connection elements.

According to one embodiment of the invention, the bus bar has as many openings as connection elements.

According to one embodiment of the invention, the bus bar has 12 openings.

According to one embodiment of the invention, the electronic assembly is disposed between the wheel and the engine compartment.

According to one embodiment of the invention, the electronic assembly is arranged at one end of the shaft (6) opposite to that where the wheel is arranged.

According to one embodiment of the invention, the electric motor is a permanent magnet or variable reluctance motor.

The invention also relates to the use of the electric compressor according to the invention in an internal combustion or fuel cell engine.

Other objects, characteristics and advantages of the invention will be better understood and will appear more clearly on reading the description made below, with reference to the appended figures, given by way of example and in which:

FIG. 1 is a schematic representation of a sectional view of a compressor according to the invention,

FIG. 2 is a view of the interior of the compressor according to the invention,

- Figure 3 is a sectional view of part of a compressor incorporating a system according to the invention.

The present invention relates to an electric compressor equipped with a system for guiding the connection element between the motor and the electronic card, and more precisely between the bus bar (also called busbar according to English terminology) and the motor stator. between the motor and the electronic card.

In the context of the invention, the expression “electric compressor” means an air compressor, volumetric or not and for example centrifugal or radial, driven by an electric motor, with the aim of supercharging a heat engine. According to one embodiment of the invention, the electric motor is an asynchronous DC or alternating current motor.

More specifically, according to one embodiment of the invention, the electric motor is a variable reluctance motor (also called SRM machine for Switched Reluctance Motor according to English terminology).

According to one embodiment of the invention, the electric motor is a permanent magnet motor.

The electric compressor 1, illustrated in FIGS. 1 and 2, comprises a compartment 8 for an electric motor 5, and bearings 7 arranged circularly around a shaft. The electric motor compartment 8 comprises an electric motor 5 which allows the shaft 6 of the electric compressor to rotate via bearings 7. The shaft 6 thus rotates a wheel 3 of the compressor 1, the wheel being arranged in a scroll 12.

The compressor 1 includes an electronic assembly 9. The electronic assembly 9 comprises at least one bus bar 92 and a power module.

The electric motor 5 comprises a rotor 51 and a stator 52.

The engine compartment 8 and the electronic assembly are adjacent. More specifically, they are arranged one after the other along the axis X of the shaft 6 of the compressor.

According to a first variant illustrated in FIG. 1, the electronic assembly 9 is disposed between the wheel 3 and the engine compartment 8. The compressor thus comprises along the shaft: the wheel 3, the electronic assembly 9 and the engine compartment 8.

According to a second variant, the electronic assembly 9 is disposed at one end of the shaft 6 opposite to that where the wheel 3 is arranged. The compressor thus comprises along the shaft: the wheel 3, the electric motor 5 and all 9 electronics.

In the context of the invention, the stator 52 of the electric motor 5 and the electronic assembly 9 are connected via a connection element 91 illustrated in FIGS. 2 and 3. More specifically, the stator 52 and the bus bar 92 of the the electronic assembly 9 is connected and / or coupled via the connection element 91.

According to one embodiment of the invention, the compressor comprises between 1 and 15 connection elements 91.

According to one embodiment of the invention, the compressor comprises 12 connection elements 91.

These connection elements 91 are welded, or screwed or fixed by any compatible means, together at the level of the bus bar and then be connected to a power module of the electronic assembly 9. For this, the bus bar has at least one opening 93 through which a connection element passes.

According to one embodiment of the invention, the bus bar has as many openings as connection elements. For example, the bus bar has 12 openings.

In the context of the invention, in order to correctly guide the connecting element 91 through the opening of the bus bar, the bus bar has an opening 93 in the form of a cone 94, visible in FIGS. 1 to 3. More precisely , the opening 93 has walls forming a cone with an open top and oriented towards the electronic assembly 9.

According to one embodiment of the invention, the opening to a shape of a cone of revolution, pyramidal or arbitrary and for example prisman.

Such an opening shape 93 allows better positioning of the connecting element 91. Indeed, the cone shape allows better guidance of the connecting element 91 in the opening 91.

The scope of the present invention is not limited to the details given above and allows embodiments in many other specific forms without departing from the scope of the invention. Consequently, the present embodiments should be considered by way of illustration, and can be modified without however departing from the scope defined by the claims supported by the description.

Claims (8)

1. Electric compressor (1) comprising a compartment (8) electric motor in which is disposed an electric motor (5) and an assembly (9) 5 electronics comprising a bus bar (92), the compartment (8) electric motor and the assembly (9) electronics being adjacent, the bus bar (92) comprising at least one opening (93) allowing the passage of at least one element (52) for connection between the electric motor (5) and the electronic assembly (9), characterized in that the opening (93) in the form of a cone (94) the apex of which faces towards the together (9) 10 electronic. 2. Electric compressor (1) according to claim 1, comprising between 1 and 15 connection elements (91). 3. Electric compressor (1) according to one of claims 1 or 2, wherein the bus bar (92) has as many openings (93) as elements (91) of 15 connection. 4. Electric compressor (1) according to one of claims 1 to 3, wherein the bus bar (92) has 12 openings (93). 5. Electric compressor (1) according to one of claims 1 to 4, in which the electronic assembly (9) is disposed between a compressor wheel (3) and the 20 engine compartment (8). 6. An electric compressor (1) according to one of claims 1 to 4, the electronic assembly (9) is arranged at one end of the shaft (6) opposite to that where a compressor wheel (3) is arranged. 7. Electric compressor according to one of claims 1 to 6, in which the electric motor (2) is a permanent magnet or variable reluctance motor. 8. Use of the electric compressor (1) according to one of the preceding claims in an internal combustion or fuel cell engine. 1/2 2/2