WO2008028205A1

WO2008028205A1 - Modular inverter system

Info

Publication number: WO2008028205A1
Application number: PCT/AT2007/000398
Authority: WO
Inventors: Markus Gundendorfer; Christoph Panhuber
Original assignee: Fronius International Gmbh
Priority date: 2006-09-04
Filing date: 2007-08-21
Publication date: 2008-03-13
Also published as: AT504199A1; DE212007000057U1; AT11986U1

Abstract

The invention relates to a modular inverter system (1) which has a connecting module (3) and at least one power module (2), with the connecting module (3) having at least one output connecting element (17) for supplying a load (13) and one input connecting element (22) for making a connection with at least one external energy source (11), and with the power module (2) having electronic components for energy conversion, in particular at least one inverter (4) etc, with the connecting module (3) and the power module (2) having plug elements (18, 19), which each correspond to one another, in order to make a connection with one another, and in which case an electrical connection can be produced between the connecting elements (17, 22) of the connecting module (3) and connections (5) of the power module (2). The connecting module (3) has a control apparatus (49) which is connected, for signal and/or data transmission purposes, to at least one further control apparatus (16) and/or to a controlled system of an inverter (4) in the power module (2).

Description

Modular inverter system

The invention relates to a modular inverter system which comprises a connection module and at least one power module, wherein the connection module has at least one connection element, in particular an AC output, for supplying a load and an input connection element, in particular a DC input, for connection to at least one external energy source and the power module electronic components for energy conversion, in particular at least one power unit, each having a DC-DC converter, DC-AC converter, intermediate circuit, a regulator device, etc., wherein the connection module and the power module have mutually corresponding plug-in elements for establishing a connection with each other, and an electrical connection between the connection elements of the connection module and terminals of the power module can be produced.

From DE 299 16 195 Ul an inverter is known, which is characterized by a modular structure with a central unit and a plurality of power units. The central unit has an AC output and a connector socket. The power units each have a male connector and a female connector and a DC input. A disadvantage of such a construction is that the DC voltage lines must each be routed to the individual power modules and connected to them, resulting in a confusing and space-intensive cabling. Furthermore, a considerable maintenance is given when replacing a power unit, since in this case a rewiring of the DC power lines for the power module is performed.

Furthermore, DE 101 61 178 A1 specifies an inverter which is at least partially modular and has detachable modules and connection lines detachably mounted on the modules for this purpose. A disadvantage of the structure described is that the structure for energy transmission via rails is structurally complex and that each of the modules must be specially wired, which in turn results in a non-transparent Visible and much space consuming wiring results.

A modular power supply unit with plug-in connections to the conductor rails is described, for example, in WO 97/14206 A1. The modular design allows a simpler and clearer connection to the busbars and thus facilitates the maintenance of the modules.

The object of the present invention is to provide an inverter system that allows a simpler, clearer connection of lines and as uncomplicated maintenance as possible.

The object of the invention is achieved independently in that the connection module has a control device which is connected for signal or data transmission with at least one further control device and / or a controlled system of an inverter in the power module. The resulting benefit is that the connection module has all the connections for DC and AC lines, whereby all lines are merged centralized in the connection module of the inverter system. It is therefore not necessary to lead directly from one of the energy source DC power lines to one of the power units for energy conversion, which are prevented when using multiple power parts confusing and space-intensive wiring. The plug-in connection between the connection module and the power module furthermore makes simple and fast maintenance of the inverter system possible, since, for example, replacement of a component of the power module, for example an inverter, is possible without having to terminate or connect lines to the component. As a result, control processes, which are provided by the control device of the connection module, can influence the inverters. For example, setpoint values can be specified to the controlled system of an inverter and / or status information, parameters, etc. can be changed and evaluated by the control device. Thus, the arrangement of a particular central operating device and / or visualization on the connection module possible, whereby the user-friendliness of the inverter system is increased.

A further advantageous embodiment variant is that the plug-in elements for making the electrical connection zwischeη the connection elements of the connection module and terminals of the power module are formed because the plug connection an exact and defined connection of the lines or connections between the connection module and the power module is possible the connection is not accessible from the outside and thus protected. In this case, an embodiment in which the plug-in elements have recesses for lines and / or contact elements is particularly expedient. Thus, a simple installation of the power module on the connection module and a quick commissioning of the same is possible.

Characterized in that at least for each existing in the connection module input terminal and the output terminal a recess in the plug elements is arranged, all connected to the input terminal energy sources can be easily connected to the power module via the plug elements. This enables extremely compact and fail-safe cabling of several energy sources and inverters.

It is also advantageous if the plug-in elements have a latching or locking device for vertically fixing the power module to the connection module, since the reliability of the inverter system is increased.

An embodiment in which the connection module has a housing which has at least one connection region with a plurality of openings on a wall, in which connection elements are arranged or lines are led into the interior of the housing, is advantageous since all the external lines to the inverter system in a common Collected area led to the connection module, whereby a clear and space-saving wiring is possible. Connection elements, which are formed in the connection module by means of clamping elements, create a reliable and proven design and enable rapid installation of components. Furthermore, the clamping elements can be structured in an advantageous manner and arranged systematically on a connection plate, whereby by assigning the clamping elements to corresponding recesses in the plug-in elements of the power module and the connection module, a unique terminal assignment can be set in the plug elements.

An embodiment variant in which in the line connection between the plug element of the connection module and the connection elements, in particular manually operable safety switch is arranged, via which the electrical connection of at least the DC voltage lines between the input terminal elements and the plug element is switchable, is advantageous, because the inverter in the power module can be disconnected from the power switch, for example, to perform an exchange or maintenance of the inverter, in which case only one safety switch for all inverters is necessary. Thus, a cost-effective and simple construction of the inverter system is achieved.

An arrangement in which the connection module in the housing has a safety device, in particular at least one cover, which protects against access to voltage-carrying parts in an interior connection module, accesses both the AC voltage lines for the output and to the DC lines of the input or the energy source prevented. In this case, it is particularly advantageous if an active or inactive state of the safety device is coupled to the position of the safety switch so that when the safety switch is activated, the safety device is active for the protection of persons and the safety device is inactive when the safety switch is switched off and access to the interior of the connection module allows.

Furthermore, it is advantageous if the connection module and / or the power module has a positioning device for the horizontal position fixing of the power module on the connection module. Thus, on the one hand exact positioning of the plug-in elements to each other is possible to make a contact for an electrical connection, and on the other hand a reverse polarity protection is given by the positioning, so that the power module can be placed only in a possible position on the connection module. Particularly expedient proves to be a positioning device, which is formed by a recess, for example a guide groove, and a projection corresponding to this, for example a guide bar.

By virtue of the fact that a monitoring element is arranged in the connection module which detects a correct fastening of walls and / or a safety device, in particular a cover, of the housing, it is advantageously possible to provide an additional protection or safety measure in order to gain access To prevent live parts of the connection module or to suppress a power output by the inverter system. In particular, the monitoring element is for this purpose connected to the control device for signal transmission, so that when detected security deficiency by an open housing by the control device, a regulation of the output voltage is such causes that no or a very low output power is delivered to the output terminal. Thus, no additional safety switching elements for the inverters are necessary for switching the current at the output connection element.

Another advantage is a further embodiment in which the power module, if necessary, has a plurality of inverters which are connected to the connection module via lines, for example a conductor rail and optionally via the plug-in elements. Thus, the output power of the inverter system can be increased and adjusted to the rated power of a load, creating a scalable system. In this case, the lines for each inverter in the power module are preferably formed by a DC voltage line for transmitting energy for the DC input, optionally a control line for signal and / or data transmission for a control input and an AC line for the AC output.

Furthermore, an embodiment variant is possible in which a line in the power module is formed by a bus bar, which is connected to all AC outputs of the inverters, or that each inverter has its own designated as AC voltage line line. By using a busbar, there is the advantage that the output powers of the individual inverters are combined on a common saximeter conductor and a higher overall output is directly available at the output connection element. Through the use of single conductors, several output connection elements can each be connected to one inverter so that several consumers can be supplied independently of each other via the inverter system.

The present invention will be explained in more detail with reference to the accompanying schematic drawings.

Show:

1 shows an inverter system with a line module including an inverter shown as a block diagram and a connection module in a greatly simplified front view;

Fig. 2: The inverter system of Figure 1 in bottom view according to arrow II in Fig. 1.

Fig. 3: The inverter system of Figure 1 in a sectional view taken along section line III-III in Fig. 1.

Fig. 4: The connection module of Figure 1 in front view with removed front wall.

Fig. 5: The connection module of Figure 4 in front view and remote security device.

FIG. 6 shows a further embodiment variant of the inverter system with a power module that comprises a plurality of inverters; FIG.

Fig. 7: A further embodiment of the inverter system comprising a plurality of power modules and inverters. FIG. 1 shows a modular mode of construction of an inverterysterα 1, which comprises a power module 2 and a connection module 3. The power module 2 has at least one inverter 4 or a power unit which is designed to convert DC voltage into AC voltage having a defined frequency, waveform and amplitude.

The inverter 2 has in each case a connection 5 for a DC input 6 and an AC output 7. Furthermore, in the embodiment shown, the inverter 2 comprises a DC-DC converter 8 (surrounded by dashed lines), a DC link 9 and a DC-AC converter 10. At the DC input 6 of the DC-DC converter 8 is an energy source 11 or a power generator connected, for example, from one or more parallel and / or series-connected solar modules (not shown), which are referred to as a solar generator, or a battery 12 may be formed. The DC-AC converter 10 is connected at the AC output 7 to one or more electrical consumers 13, such as a refrigerator, a radio, etc., and / or an AC mains. For example, the inverter system 1 is used as an island inverter for supplying consumers decoupled from the public power grid. By the optional use of several inverters 2, as described in more detail later, on the one hand more power for operating the consumers 13 can be provided. On the other hand, due to the redundant structure by using multiple inverters 2, the failure probability of the inverter system 1 can be reduced, whereby critical consumers 13 can be supplied fail-safe with energy. Furthermore, the inverter system 1 can be used to feed energy into the public grid.

The DC-DC converter 8 is formed at least by a power electronics 14 and a transformer 15. The power electronics 14 has a switching device which is controlled or clocked at a control input, so that the energy supplied to the transformer 15 can be determined by means of pulse width modulation (PWM) of the control signal at the control input. The intermediate circuit 9 is composed of one or more capacitors, in particular Electrolytic capacitors, constructed. The intermediate circuit 9 is used for energy storage and this is therefore charged to an intermediate circuit voltage from which an AC voltage is generated at the output 7 via the DC-AC converter 10. So that the desired AC voltage for the load 13 can be generated at the output 7, the DC-AC converter 10 is formed by a corresponding inverter, which converts the DC voltage into an AC voltage. Other components or assemblies, such as filter circuits,

^' Smoothing capacitors, etc., are not shown in the embodiment shown. Since the individual components or assemblies and functions of inverters 2 are already known from the prior art, they will not be discussed in detail below. Furthermore, other known from the prior art embodiments for the conversion of DC voltage into AC voltage can be used as the inverter 4 in the inverter system 1.

Furthermore, the inverter 2 has a controller or a control device 16, which may be formed, for example, by a microprocessor, a microcontroller or a computer. Via the control device 16, a corresponding control of the individual modules, in particular the switching elements arranged therein, are made. In the control device 16 for this purpose, the individual control or control processes are stored by appropriate software programs and / or data or characteristics.

The connection module 3 has at least one output connection element 17, which can be coupled to a load 13 in order to supply it with energy. At the output terminal 17 is an AC voltage, which is generated by the DC-AC converter 10, wherein the output terminal 17 is connected to the AC output 7 of one or more inverters (n) 4 in the power module 2.

The power module 2 and the connection module 3 are mechanically and optionally electrically coupled via a pluggable connection. In the exemplary embodiment shown in FIG. 1, the power module 2 has a first plug-in element 18 and the connection Final module 3, a further plug-in element 19, wherein the plug-in elements 18, 19 are mutually engageable, so that the connection between the power module 2 and the connection module 3 is made. The plug-in elements 18, 19 are formed corresponding thereto, wherein one of the plug-in elements 18; 19 through a plug 20 and the other plug-in element 18; 19 may be formed by a socket 21. Such connectors are also known in the art, which is why their details are not discussed in more detail.

According to the invention, the connection module 3 has, in addition to the output connection element 17, an input connection element 22 which can be coupled to the energy source 11. The input terminal 22 is formed as a DC voltage input, so that the power source 11 is preferably formed by a DC voltage source. The input terminal 22 is connectable to the DC input 6 of one or more inverters (s) 4 in the power module 2 to provide a DC voltage to be converted.

It is now provided that between the connection elements 17, 22 of the connection module 3 and the terminals 5 of the at least one inverter 4 in the power module 2, an electrical connection can be established. Here, all lines or wiring to external components such as the power source 11 and the consumer 13 in the connection module 3 are centrally combined, resulting in the advantage of a clear and space-saving wiring and improved maintainability.

In a possible embodiment variant according to FIGS. 1 to 3, the electrical connection between the inverter 4 and the connection elements 17, 22 is produced via the plug-in elements 18, 19. The plug-in elements 18, 19 have for this purpose, for example, recesses 23, are performed by the connecting conductor 24. Furthermore, the plug-in elements 18, 19 may comprise contact elements 25 for producing an electrically conductive connection, the contact elements 25 being connected to the terminals 5 or connection elements 17, 22. Such contact elements 25 and contact inserts are from the Known in the art, which may be formed for example by pins, sleeves, bushes, etc.

Furthermore, the plug-in elements 18, 19 may have a latching or locking device 26, via which the power module 2 on the connection module 3 in the vertical direction, in which the power module 2 is placed on the connection module 3, can be releasably locked. For this purpose, the latching or locking device 26 locking nubs, resilient locking arms, frictional retaining elements or the like, which fix the power module 2 on the connection module 3 in an end position.

The connection module 3 has a housing 27 on which preferably at least one connection region 28 is formed which has a plurality of openings 29. The in particular circular openings 29 project through a wall 30, wherein the wall 30 preferably forms an underside 31 of the connection module 3 and the openings 29 are accessible on this underside 31. The openings 29 may of course be arranged on side walls 32 and a rear wall 33 or front wall 34. Furthermore, in the connection region 28, a plate-shaped insert with the openings 29 can be inserted into the housing 27, which can be formed as required interchangeable.

In the connection region 28, an electrical connection between the lines 35 extending outside the connection module and the connection elements 17, 22 is produced via the openings 29. For this purpose, the lines 35 can be guided through the openings 29 in an interior of the connection module 3 and be brought directly into contact with the connection elements 17, 22. Furthermore, 29 connecting elements 36 may be arranged in the openings, which have in particular known from the prior art coupling devices or closures for cable connections. Such connecting elements 37 are each conductively connected to the connecting elements 17, 22.

In the exemplary embodiment shown in FIGS. 1 to 3, the connection module 3 has a first connection region 28a, on which all lines 35 led to the input connection element 22, ie, direct current voltage coming from the energy source 11, are provided. are summarized. The connection module 3 has a further connection region 28b, at which the line 35 coming from the output connection element 17, which leads to a consumer 13, is led out of the connection module 3. In the embodiment shown, all lines 35 external to the inverter system 1 are thus arranged on a common wall-here on the wall 30 with the underside 31-of the connection module 3.

From FIG. 3 it can be seen that the connection module 3 or the power module 2 has a positioning device 37 in order to fix the position of the power module 2 relative to the connection module 3 in a horizontal plane 38. In the exemplary embodiment shown, the positioning device 37 is formed by a recess 39 and a corresponding projection 40, whereby a vertical guide 41 is formed. The positioning device 38 or the guide 41 can, as shown, be arranged on the plug-in elements 18, 19, whereby the recesses 23, connecting conductors 24 or the contact elements 25 of the plug-in elements 18, 19 are correctly positioned for establishing an electrical connection. The first, as plug 20 formed plug-in element 18 has a recess formed as a guide groove 42 39 and the other, designed as a socket 21 plug-in element 19 has a projection formed as a guide bar 43 40. It should be noted that in a further embodiment, the positioning device 38 can also be arranged independently and independently of the plug-in elements 18, 19 on the housing 27 of the connection module 3 or a housing 42 of the power module 2. By the

Positioning device 37 is further ensured that the power module 2 can be placed only in a defined position on the connection module 3, whereby a reverse polarity protection for the plug-in elements 18, 19 is achieved.

The output connection element 17 and the input connection element 22 are preferably formed by clamping elements 45, which are arranged in an inner space 46 of the connection module 3. The clamping elements 45 are directly connected to the lines 35, or indirectly via the connecting elements 36 or of these leading to the clamping elements 45 lines 47 and rigid Lei terbahnen that are permanently laid in Anschlussπvodul 3, wherein these lines 47 and traces are shown in the figures schematically by dashed lines.

The clamping elements 45 are further electrically connected to terminals 5 of at least one inverter 4 or power unit in the power module 2. For this purpose, the connections 5 in the power module 2 are in turn connected to lines 48 or rigid printed conductors, which are permanently laid in the power module 2. In the embodiment shown, these lines 48 are looped via the recesses 23 in the plug-in elements 18, 19 in the interior 46 of the connection module 3, where they are connected to the corresponding clamping elements 45. Each recess 23 in the plug-in elements 18, 19 can thus have a defined conduction, e.g. a DC voltage line, a control line or an AC voltage line, be assigned, so that a defined and unique assignment of the stretching elements 18, 19 is achieved.

It should be noted that the details of the cabling in the power module 2 and in the connection module 3 will not be discussed in detail since corresponding devices such as e.g. Ladder rails, tracks, free wiring or the like from the prior art are known.

Furthermore, the connection module 3 may have a control device 49, which is connected to at least one further control device 16 and / or a controlled system in the power module 2 for signal and / or data transmission. In this case, the control device 49 can be embodied as a central control unit of the inverter system 1, which transmits at least reference values for controlling the at least one inverter 4 to its control system. Furthermore, each inverter 4 may additionally have the control device 16, which optionally communicates via the lines 47, 48 with the control device 49 of the connection module 3.

By such a structure, in particular rule specifications, status information, user inputs or the like to the control device 49 of the connection module 3 or the inverter ter 4 are transmitted. Furthermore, an operating device 50 and / or a visualization 51 can be provided centrally on the connection module 3, whereby a central input and output interface is realized by the connection module 3 and a high degree of user-friendliness for the operation of the inverter system 1 is achieved.

FIGS. 4 and 5 show the inverter system 1 according to FIGS. 1 to 3 without a front wall 34. In Fig. 4 it can be seen that the connection module 3 has a safety device 52 which covers the interior 46 of the connection module 3 when removing the front wall 34 and protects against access to voltage-carrying components. The safety device 52 may be formed by one or more plate-shaped covers 53, which are fastened to the housing 27 of the connection module 3 via connecting elements 54, for example screws. Furthermore, the covers 53 may each have handling elements 55, which may be formed in particular by a recess 56. Thus, a handle-piece-like arrangement is formed, whereby a user can grasp and remove the cover 53 in a simple manner with one hand.

The connection module 3 further has a safety switch 57, which is preferably manually operable by a user when the safety device 52 is present or active. In particular, it is possible that the safety device 52 can only be removed from the connection module 3 when the safety switch 57 is in an OFF position. In an ON position of the safety switch 57, a removal of the safety device 52 is not possible. In Fig. 4, the safety switch 57 is in the ON position, which is why the covers 53 of the safety device 52 can not be removed from the connection module 3. In Fig. 5, however, the safety switch 57 is in the OFF position, whereby the covers 53 are released for removal from the housing 27 of the connection module 3. In Fig. 5, therefore, the connection module 2 is shown with remote from this security device 52 and free access to the interior 46.

The safety switch 57 is in the via the lines 47 on constructed line connection between the plug-in elements 18, 19 and the connection elements 17, 22 are arranged. About the safety switch 57, the electrical connection between the power module 2 and the connection module 3 - in the exhibition befindlichem safety switch - thus be interrupted, at least connected to the power source 11 DC power lines can be switched via the safety switch 57. If necessary, high powers are switched via the safety switch 57, so that this can be formed according to power switching elements or the like known from the prior art.

For example, the safety switch 57 has a special shape, for example a projecting locking element 58, which in the OFF position is congruent with a recess 58 arranged in the cover 53 and prevents the cover 53 from being removed in the ON position. In the OFF position, the blocking element 58 finds room in the recess 58, whereby the cover 53 can be removed.

5, a connection plate 60 can also be seen, which is fastened to an inner side 61 of the rear wall 33 of the connection module 3 via further connection elements 54. At least the clamping elements 45 are arranged on the connection plate 60, whereby further components known from the prior art, such as overload protection or fuses, the control device 49, etc., can be arranged on the connection plate 60.

There is the possibility that a plurality of connection plates 60 can be arranged in the connection module 3 in order to increase the number of available connection elements 17, 22. For example, a slot is provided in the connection module 3 for each connectable connection plate 60, wherein such modular systems are known from the prior art, which is why at this point will not be discussed in more detail.

Furthermore, the connection module 3 may have a monitoring element 62, via which a correct attachment of one of the walls 30, 32 to 34 of the housing 27 and / or the cover 53 can be detected. The monitoring element 62 is compatible with the tax direction 49 for signal transmission, whereby a control signal to the at least one inverter 4 can be sent in response to the detected by the monitoring element 62 state by the control device 49. Thus, it is possible, for example, when opening the housing 27 by removing one of the walls 30, 32 to 34 or when removing the cover 53 this is detected by the monitoring element 62, whereupon the control device 49, a corresponding control signal for deactivating the AC Output 7 _r ie to deliver a little or no power is sent to the inverter 4, whereby no or a very low alternating voltage is applied to the output terminal 17. Furthermore, the DC input 6 of the inverter 4 can be deactivated as needed, for example, switched to high impedance. By such a regulation of the output power of the inverter 4 to zero, it is expedient to dispense with manual switching elements, in particular circuit breakers, in order to achieve a voltage-free state at the output connection element 17, which may be a necessary safety measure for the connection module 3.

The monitoring element 62 may be formed, for example, by a switching contact 63 which is activated when the housing 27 or active safety device 52 is closed and which is deactivated when a component of the housing 27 or the safety device 52 is removed, the switching contact 63 being connected to the control device 49 is and the control device evaluates the state of the switching contact 63.

To the control device 47 it should be noted that this is preferably digitally formed by a microprocessor and a memory, in particular a microcontroller, and control logics, values, characteristics and the like are stored in the memory.

FIG. 6 shows a further embodiment variant of the inverter system 1. In this case, the power module 2 has a plurality of inverters 4 and a plurality of energy sources 11 are connected to the input connection element 22 of the connection module 3, each energy source 11 being assigned to an inverter 4. The connection module 3 can be designed as described in FIGS. 1 to 5 and has a connection region 28 for Have DC inputs or an AC output.

In the power module 2, the inverters 4 are preferably arranged interchangeably, so that the power module 2 has a modular design. By way of example, the power module 2 can have a plurality of bays for different inverters 4. The inverter system 1 is thus scalable, i. That is, the output power at the output terminal 17 can be determined by the number of the inverters 4 arranged in the power module 2 and the power sources 11 connected thereto. The terminals 5 of the inverter 4 are connected via lines 48 to the connection module 3, wherein in the embodiment shown, a conductor rail 64 is arranged, which has all lines 48 for energy transmission and for signal and / or data transmission. The connections 5 of the inverters 4 can be connected, for example via connecting elements 65, for example screws, to the conductor rail 64, wherein each line 48 of the conductor rail 64 is connected to a connection 5 of the inverter 4 assigned thereto.

The conductor rail 64 may be performed in a possible embodiment of the power module 2 in the connection module 3, wherein the conductor rail 64 is connected to the connection elements 17, 22. The plug-in elements 18, 19 are formed in this case for producing a mechanical connection and optionally an electrical connection for transmitting low power for control signals, in particular for signal and / or data transmission. In the further exemplary embodiment shown in FIG. 6, the conductor rail 64 is connected to contact elements 25 in the plug-in element 18, so that via the plug-in elements 18, 19 the mechanical and electrical connection for energy transmission and signal and / or data transmission between the power module 2 and the connection module 3 is formed.

FIG. 7 shows a further embodiment variant of the inverter system 1 with a plurality of inverters 4 for a plurality of energy sources 11. In this case, each power module 2 has two plug-in elements 18, 19, in particular a plug 20 and a Socket 21. The connection module 3 has a plug-in element 19, in particular a socket 21, on. Thus, a plurality of power modules 2, each having at least one inverter 4, are connected via the plug-in elements 18, 19, wherein the lowermost power module 2 with the connection module 3 via the plug-in elements 18, 19 is connectable. The lines 48 of the power modules 2 are looped through the plug-in elements 18, 19 to the connection module 3, wherein the line courses in Fig. 7 are not shown in detail, since these as described above or in Figs. 1 to 6 may be formed.

It can be the individual in Figures 1, 2, 3, 4, 5; 6; 7 embodiments or parts of the description relating to these figures form the subject of independent solutions according to the invention. The relevant objects and solutions according to the invention can be found in the detailed descriptions of these figures.

Claims

Claims:

1. Modular inverter system (1) comprising a connection module (3) and at least one power module (2), wherein the connection module (3) at least one output terminal element (17), in particular an AC output, for supplying a load (13) and an input connection element (22), in particular a DC voltage input, for connecting to at least one external energy source (11) and the power module (2) electronic components for energy conversion, in particular at least one inverter (4) each having a DC-DC converter, DC-AC converter, intermediate circuit, a control device, etc., wherein the connection module (3) and the power module (2) for establishing a connection with each other mutually corresponding plug elements (18, 19), and an electrical connection between the connection elements (17, 22) of the connection module (3) and connections (5) of the power module (2) can be produced, dadu characterized in that the connection module (3) has a control device (49) which is connected for signal or data transmission with at least one further control device (16) and / or a controlled system of an inverter (4) in the power module (2).

Second inverter system according to claim 1, characterized in that the plug-in elements (18, 19) for producing the electrical connection between the connection elements (17, 22) of the connection module (3) and terminals (5) of the power module (2) are formed.

3. inverter system according to claim 1, characterized in that the plug-in elements (18, 19) recesses (23) for connecting conductors

(24) and / or contact elements (25).

4. inverter system according to claim 3, characterized in that at least for each in the connection module (3) existing input terminal element (22) and the output terminal element (17) has a recess (23) in the plug-in elements (18, 19) is arranged.

5. Inverter system according to one of the preceding claims, characterized in that the plug-in elements (18, 19) have a latching or locking device (26) for vertical fixing of the power module (2) on the connection module (3).

6. Inverter system according to one of the preceding claims, characterized in that the connection module (3) has a housing (27) on a wall (30) at least one connection region (28) having a plurality of openings (29), in which connecting elements

(36) are arranged or lines (35) are guided in the interior of the housing (27).

7. Inverter system according to one of the preceding claims, characterized in that the connection elements (17, 22) in the connection module (3) by clamping elements (45) are formed.

8. Inverter system according to one of the preceding claims, characterized in that in the ^' line connection between the plug element (18; 19) of the connection module (3) and the connection elements (17, 22), in particular a manually operable safety switch (57) is arranged via in that the electrical connection of at least the DC voltage lines (47) between the input terminal elements (22) and the plug-in element (18; 19) can be switched.

9. Inverter system according to one of the preceding claims, characterized in that the connection module (3) in the housing (27) has a safety device (52), in particular at least one cover (53), which in front of an access to live parts in an interior ( 46) Connection module (3) protects.

10. Inverter system according to claim 9, characterized in that an active or inactive state of the safety device (52) is coupled to the position of the safety switch (57).

11. Inverter system according to one of the preceding claims, characterized in that the connection module (3) and / or the power module (2) has a positioning device (37) for the horizontal position fixing of the power module (2) on the connection module (3).

12. Inverter system according to claim 11, characterized in that the positioning device (37) by a recess (39), for example a guide groove (42), and a corresponding projection to this (40), for example, a guide bar (43) is formed.

13. Inverter system according to one of the preceding claims, characterized in that in the connection module (3) a monitoring element (62) is arranged, which is a correct attachment of walls

(20, 32, 33, 34) and / or a safety device (52), in particular a cover (53), of the housing (27) detected.

14. Inverter system according to claim 13, characterized in that the monitoring element (62) is connected to the control device (49) for signal transmission.

15. Inverter system according to one of the preceding claims, characterized in that the power module (2), if necessary, a plurality of inverters (4) via lines (48), for example a conductor rail (64) and optionally via the plug-in elements (18, 19) the connection module (3) are connected.

16. Inverter system according to claim 15, characterized in that the lines (48) for each inverter (4) in the power module (2) by a DC voltage line for power transmission for the DC input (6), optionally a control line to the signal and / or Data transmission for a control input and an AC line for the AC output (7) are formed.

17. The inverter system according to claim 15 or 16, characterized in that ^• a line (48) in the power module (2) is formed by a bus bar, which is connected to all AC outputs (7) of the inverter (4), or that each inverter (4) has its own provided as an alternating voltage line line (48).