DE102009007956B4 - Inverter - Google Patents

Abstract

Converter, comprising connection devices which can be operated with a tool and by means of which busbars leading from the outside and/or to the outside can be electrically and mechanically connected to busbars (9, 10) encompassed by the converter,
wherein the converter comprises control electronics for generating control signals for power semiconductors of an inverter constructed from individual motor phase modules,
wherein the converter comprises a power supply for supplying the control electronics,
wherein the converter comprises a frame to which the control electronics, the motor phase modules of the inverter and other modules are attached,
The power supply unit can be pulled out of the converter frame via rails,
on which counter rails can be inserted or pulled out,
wherein the power supply is mounted on a mounting plate on which the corresponding counter rail parts are provided,
the space exposed by pulling out is necessary for operating the connecting devices with a tool,
wherein the connecting devices include screws which can be actuated by the tool designed as a screwdriver,
whereby the busbars encompassed by the converter can be electrically connected to the busbars leading from the outside and/or to the outside by means of the screws,
This connection area can be protected against contact by means of the inserted power supply,
wherein an electrical supply line for supplying the control electronics module is led from the control electronics module to a plug connection provided on the power supply unit,
wherein the busbars include busbars that act as electrical lines to the motor supplied by the converter.

Description

The invention relates to a converter.

It is known to use converters to supply electric motors.

From the DE 38 02 593 A1 A converter is known in which a circuit board can be folded down. This improves the accessibility of connection devices.

From the US 6 175 490 B1 A non-retractable power module is shown that can be moved linearly on rails.

From the DE 102 15 822 A1 A converter system is known.

From the DE 10 2006 035 860 A1 a connection socket is known.

From the DE 102 05 101 B4 The closest state of the art is a network connection module.

From the DE 297 19 226 U1 A busbar for connecting two electrical modules is known.

The invention is therefore based on the object of designing a converter in a compact manner.

According to the invention, the object is achieved in the converter according to the features specified in claim 1.

Important features of the invention in the converter are that it comprises connecting devices that can be operated with a tool, by means of which busbars leading from the outside and/or to the outside can be electrically connected, in particular also mechanically connected, to busbars included in the converter,
wherein the converter comprises control electronics for generating control signals for power semiconductors of an inverter, in particular an inverter constructed from individual motor phase modules,
wherein the converter comprises a power supply for supplying the control electronics, the
wherein the converter comprises a frame to which the control electronics, the inverter, in particular its motor phase modules, and other modules are attached,
The power supply unit can be pulled out of the converter frame via rails,
wherein the space area exposed by pulling out is provided for, and in particular is necessary for, operating the connecting devices with a tool.

The advantage of this is that it allows for a compact converter design, allowing the use of busbars—less flexible electrical conductors compared to cables. This allows the converter to be designed for currents of 100 amperes and more in a very compact manner. To connect the external busbars, the connection area is easily accessible by pulling out the additional module on the rails. This allows quick access to the connection area, but can also be protected by inserting the additional module.

In an advantageous embodiment, the connecting devices include screws that can be operated by a tool designed as a screwdriver. This is advantageous because simple, cost-effective means are used, thus enabling easy electrical connection.

In an advantageous embodiment, the busbars encompassed by the converter can be electrically connected to the busbars leading from the outside and/or to the outside by means of the screws. The advantage here is that a simple tool can be used.

In an advantageous embodiment, the connection devices cannot be operated with a tool when the power supply is inserted. An advantage here is that the connection area can be protected against contact by means of the inserted module that encompasses the power supply.

In an advantageous embodiment, an electrical supply line is routed from the control electronics module to a plug connection provided on the power supply. This is advantageous because the electrical connection can be made even when another module is removed.

In an advantageous embodiment, the busbars comprise busbars which act as electrical lines to a braking resistor, wherein the power supplied to it is controlled by a braking chopper which is arranged in a braking chopper module comprised by the converter and is controlled by the control electronics.

In a further advantageous embodiment, the busbars include busbars which act as electrical lines to the motor supplied by the converter.

In an advantageous embodiment, the busbars include busbars which act as electrical lines for supplying the converter from the mains.

Further advantages arise from the subclaims.

• In der 2 ist ein Ausschnitt eines erfindungsgemäßen Umrichters in Schrägansicht aus einer ersten Blickrichtung gezeigt, wobei das 24 Volt-Netzteil 8 am Gegenschienenteil herausgezogen dargestellt ist.
• In der 3 ist eine zugehörige Schrägansicht aus anderer Blickrichtung dargestellt.

The invention will now be explained in more detail with the aid of illustrations:

• In the 2 a section of a converter according to the invention is shown in an oblique view from a first viewing direction, wherein the 24 volt power supply 8 is shown pulled out on the counter rail part.
• In the 3 a corresponding oblique view from a different perspective is shown.

In 1 the section of the converter is shown in the inserted position.

The converter is composed of modules attached to a frame. The modules include at least one rectifier module, which is electrically connected to the connection means 3 for the mains supply lines via busbars 9. The output side of the rectifier module is connected to a capacitor module and supplies three motor phase modules, each comprising a series circuit of controllable power semiconductors, the node of which is electrically connected to the busbars 10, which in turn are connected to the connection means 4 for connecting the motor supply lines. Another module comprises a control electronics module, with the control electronics generating control signals for the phase modules.

The modules are attached to the frame, which comprises frame parts 2 to which rail parts 1 are attached. Counter-rail parts 6 of another module can be inserted or removed onto these rail parts 1. This module includes a power supply 8 for generating 24 volts and is attached to a mounting plate 7, on which the counter-rail parts 6 are provided.

The power supply generates the supply voltage for the control electronics. A plug connection is provided on the power supply for this purpose, with the cables leading to the control electronics being connected to the power supply via a connector.

Because the additional module, including the power supply unit, can be easily pulled out on rails, the connection area for the busbars leading to the converter from the outside is easily accessible. In particular, the screws for connecting the busbars leading in from the outside to the busbars encompassed by the converter can be operated with a screwdriver after the additional module has been pulled out.

In this way, a particularly compact design of the converter can be achieved.

List of reference symbols

1

Rail part

2

frame part

3

Connection devices for mains supply

4

Connection device for motor connection cable

5

Connection means for connecting cables for braking resistor

6

Counter rail part

7

Mounting plate

8

24-volt power supply

9

Busbars for rectifier module

10

Busbars for motor phase modules

Claims (4)

Converter, comprising connection devices that can be operated with a tool and by means of which busbars leading from the outside and/or to the outside can be electrically and mechanically connected to busbars (9, 10) comprised by the converter, wherein the converter comprises control electronics for generating control signals for power semiconductors of an inverter constructed from individual motor phase modules, wherein the converter comprises a power supply unit for supplying the control electronics, wherein the converter comprises a frame to which the control electronics, the motor phase modules of the inverter and further modules are fastened, wherein the power supply unit can be pulled out from the frame of the converter via rails onto which counter rails can be pushed in or pulled out, wherein the power supply unit is fastened to a mounting plate on which the corresponding counter rail parts are provided, wherein the space area that can be exposed by pulling out is necessary for actuating the connection devices with a tool, wherein the connection devices comprise screws that can be actuated by the tool designed as a screwdriver, wherein by means of the screws the busbars comprised by the converter can be connected to the busbars leading from the outside and/or the busbars leading outwards can be electrically connected by means of actuating the screws, wherein this connection area can be protected against contact by means of the inserted power supply unit, wherein an electrical supply line for supplying the control electronics module is led from the control electronics module to a plug connection provided on the power supply unit, wherein the busbars include busbars which act as electrical lines to the motor supplied by the converter. Converter according to Claim 1 , characterized in that when the power supply is inserted, the connection devices cannot be operated with a tool. Converter according to Claim 1 or 2 , characterized in that the busbars comprise busbars which act as electrical lines to a braking resistor, the power supplied to it being controlled by a braking chopper which is arranged in a braking chopper module comprised by the converter and is controlled by the control electronics. Converter according to at least one of the preceding claims, characterized in that the busbars comprise busbars which act as electrical lines for supplying the converter from the mains.