Classifications

• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
  • H05K7/00—Constructional details common to different types of electric apparatus
  • H05K7/14—Mounting supporting structure in casing or on frame or rack
  • H05K7/1422—Printed circuit boards receptacles, e.g. stacked structures, electronic circuit modules or box like frames
  • H05K7/1427—Housings
  • H05K7/1432—Housings specially adapted for power drive units or power converters
  • H05K7/14324—Housings specially adapted for power drive units or power converters comprising modular units, e.g. DIN rail mounted units
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
  • H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
  • H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
  • H02M1/00—Details of apparatus for conversion
  • H02M1/32—Means for protecting converters other than automatic disconnection
• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
  • H05K5/00—Casings, cabinets or drawers for electric apparatus
  • H05K5/02—Details
  • H05K5/0217—Mechanical details of casings
• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
  • H05K7/00—Constructional details common to different types of electric apparatus
  • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
  • H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
  • H05K7/00—Constructional details common to different types of electric apparatus
  • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
  • H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
  • H05K7/20909—Forced ventilation, e.g. on heat dissipaters coupled to components
• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
  • H05K7/00—Constructional details common to different types of electric apparatus
  • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
  • H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
  • H05K7/20909—Forced ventilation, e.g. on heat dissipaters coupled to components
  • H05K7/20918—Forced ventilation, e.g. on heat dissipaters coupled to components the components being isolated from air flow, e.g. hollow heat sinks, wind tunnels or funnels

Definitions

• the invention relates to an inverter with a multi-part housing and an internal cooling air duct. STATE OF THE ART
• Inverters may convert electrical power of a power generation unit from DC to AC and into a power grid, for example
• AC power supply feed and / or an electrical load directly to its operation.
• an energy generating unit can in particular
• Generators can be used which generate electrical power from renewable sources, such as photovoltaic or wind generators.
• a housing of an inverter must meet various requirements. These include in particular the provision of connections for DC, AC and communication lines, the recording and cooling of power electronic components such as switching elements and windings as well as the shielding of the electronic components against environmental influences. In addition, a should
• Inverter should be as compact as possible in terms of its external dimensions and weight, with a good mountability of its components should be guaranteed.
• EP2299582A1 discloses an inverter with a housing, wherein a cooling air duct in the longitudinal direction of the center of the rear side of the housing
• Cooling air ducts aligned cooling fins runs and wherein power electronic components in the housing abut the inside of an outer wall of the housing, the one
• Boundary surface of the cooling air channel forms.
• a safety power supply with a closed housing with forced-ventilation cooling devices is known, which comprise a ventilation channel which extends in the housing and is sealed from this, wherein the cooling means comprise at least two mutually electrically separate heat sink sections, the
• Ventilation duct include in the ventilation duct projecting cooling fins and for the separate attachment of heat-emitting components of a primary and a
• DE102013022306A1 discloses an electrical appliance with a housing, a heat sink and an air guide, wherein the air guide, the heat sink and the housing form a cooling air passage and a cooling air flow is passed through the cooling air passage.
• DE102013100607A1 discloses an inverter having a first and a second housing module, in which a cooling air channel opening into the surroundings of the inverter is bounded in the circumferential direction partly by the first housing module and partly by the second housing module.
• the invention has the object of disclosing an inverter with a multi-part housing, the housing ensures a sufficient dissipation of the heat loss of power electronic components and at the same time has compact external dimensions and low weight for high electrical power in areas of several tens of kilowatts and cost-effectively is.
• An inverter for converting an input-side direct current into an output-side alternating current for feeding into an alternating voltage network comprises a first housing part with direct current connections for receiving direct current lines of a DC generator, a second housing part with AC terminals for receiving AC lines of an AC voltage network, a third housing part for receiving power electronic components of a DC-DC converter, and a fourth housing part for receiving power electronic components of an inverter bridge circuit.
• the housing parts each have a substantially planar rear wall and are arranged such that they enclose a cooling air channel with a substantially rectangular cross-section, wherein the first housing part relative to the second housing part and the third housing part are arranged opposite the fourth housing part.
• the inverter is characterized in that a cooling body is arranged in the cooling air channel, which has two opposite and substantially planar cooling surfaces, wherein the cooling surfaces are associated with the rear walls of the third housing part and the fourth housing part and arranged in these housing parts power electronic components in
• An inverter having such a structure has compact external dimensions because of the electrical, electronic and electromechanical ones necessary for converting the input-side direct current into the output-side alternating current
• Components are arranged distributed over several housing parts. Because the cooling body has two cooling surfaces and is arranged between the third and the fourth housing part, in particular the power electronic components of the
• Inverter which experience has produced the most heat loss, are placed within the third and the fourth housing part on a larger compared to conventional inverters cooling surface, at the same time the dimensions of the inverter, i. its height, width and depth, can be optimally adapted to each other. In particular, the division of the components of the inverter in
• connection areas for DC and AC power line in easily accessible places can be positioned so that commissioning of the inverter can be easily and safely performed.
• a two-stage inverter with a DC-DC converter and an inverter bridge circuit usually has a DC intermediate circuit, which can consist of a large number of capacitors, especially at high power ratings in the range of a few tens to several hundred kilowatts.
• the DC intermediate circuit is preferably divided between the third and the fourth housing part, i. a first part of the DC intermediate circuit is in the third housing part and a second part of the DC intermediate circuit is arranged in the fourth housing part.
• the first and the second part of the DC voltage intermediate circuit have approximately equal capacitances, so that the DC voltage intermediate circuit is split approximately halfway between the third and the fourth housing part.
• At least about one quarter of the capacitance of the DC intermediate circuit is in one housing part and three quarters of the capacitance is in the other housing part.
• this division results in advantages in the electromagnetic compatibility (EMC) of the inverter.
• EMC electromagnetic compatibility
• cable distances from the DC-DC converter to the DC intermediate circuit and further from the DC voltage intermediate circuit to the inverter bridge circuit can be kept very short; Just on these cable routes a clocking of switching elements of the DC-DC converter and the inverter bridge circuit causes a high-frequency modulation and thus a potential radiation, while a voltage of the DC intermediate circuit and thus connecting lines between the arranged in different housing parts parts of the DC intermediate circuit are largely free of high-frequency modulations.
• the first part and the second part of the DC intermediate circuit are electrically connected to each other via intermediate circuit connection lines which extend within a tubular connection channel between the third housing part and the fourth housing part.
• an outer wall of the connecting channel is designed to be electrically insulating.
• the connecting channel preferably has at least two subchannels for receiving intermediate circuit connecting lines having a positive and a negative potential, wherein the subchannels extend axially along the connecting channel and by means of an axial
• connection channel may have a third sub-channel for receiving intermediate circuit connecting lines with a midpoint potential of the DC intermediate circuit, wherein the third sub-channel also extends axially along the connecting channel and opposite electrically insulated over the first and the second sub-channel by means of a further axially extending partition wall.
• the intermediate circuit connecting lines extending within the connecting channel are electrically insulated from one another by the electrically insulating outer wall relative to the housing parts and possibly the surroundings and on the other hand by the electrically insulating partitions, isolation of the intermediate circuit connecting lines themselves can be dispensed with be reduced to a minimum, with the observance of possibly normatively required isolation distances by the
• the DC link connecting lines can be made highly flexible and in particular each comprise a mesh of electrically conductive wires, so that it is possible to lay the DC link connecting lines within the third and the fourth housing part with very tight radii in order to establish a connection to the parts of the DC intermediate circuit ,
• the DC link connecting lines for example after their exit from the connecting channel in a confined space by 90 degrees or 180 degrees turn and be mounted on a circuit board that receives the capacitors of the DC link. This simplifies both the installation of the inverter and optimizes the available space.
• the connecting channel may comprise two sub-tubes, wherein in each case one sub-tube extends into the third housing part and into the fourth housing part.
• the sub-tubes can be mounted separately in the housing parts, so that the assembly of the inverter results in a continuous connection channel; Alternatively, the sub-tubes can be pushed through the rear walls of the housing part even after the assembly of the housing parts. This further simplifies the installation of the inverter.
• inverter winding goods are arranged in the first housing part and / or in the second housing part, which are designed as filter chokes and / or storage chokes and set up for filtering or storing the converted direct current and / or the converted alternating current.
• These windings are usually necessary for the operation of the inverter, take a significant amount of space and contribute a significant share of the total weight of the inverter.
• a balanced weight distribution can be achieved and the installation of the inverter is further simplified by the winding material can be made regardless of the assembly of the arranged in the third and fourth housing part components of the DC-DC converter and the inverter bridge circuit.
• a short length of lines can be achieved between the input or output connections and the winding goods arranged electrically on the input side of the DC-DC converter and on the output side of the inverter bridge circuit.
• a DC circuit breaker in the first housing part and / or an AC circuit breaker in the second housing part is arranged.
• the heat sink comprises one of
• Housing parts separate, one-piece or multi-part component.
• This component may in particular comprise an extruded profile which is simple and inexpensive to produce.
• opposite cooling surfaces of the heat sink can be fitted in corresponding recesses in the rear walls of the third housing part and the fourth housing part.
• components to be cooled arranged within the third and fourth housing parts can be mounted directly on the cooling surfaces, without any continuous rear walls of the third or fourth housing part of the heat dissipation providing additional thermal resistance.
• the heat sink may be formed by cooling ribs which are arranged on the mutually opposite rear walls of the third housing part and the fourth housing part. This also allows optimal thermal contact between the components to be cooled, simplifies installation and ensures optimum sealing of the interiors of the third and fourth housing part relative to the cooling air duct and thus to the environment.
• the inverter may have at least one further heat sink which is arranged on the rear wall of the first housing part or of the second housing part and is arranged for cooling the winding goods arranged in the first housing part and / or in the second housing part and in thermal communication with the cooling air duct, so that the further heat sink receives heat from the winding goods and emits cooling air flowing through to the cooling air passage.
• a further cooling surface is available within the first and / or the second housing part, which ensures cooling of the winding goods without additional installation effort and with no or only slight increase in the dimensions of the inverter.
• a fan unit is arranged at one end of the cooling air channel, which is adapted to generate a cooling air flow through the cooling channel.
• the fan unit may be displaceable in a direction perpendicular to the axis of the cooling air passage, wherein the displacement is releasably blocked by a locking device, so that the fan unit can be removed from the inverter.
• a cover On the side opposite the fan unit side of the cooling air duct, a cover may be arranged. This cover protects the cooling air duct against contamination from the surroundings of the inverter and can deflect the cooling air flow emerging from the cooling air duct and thereby prevent any soiling, in particular particles, from escaping from the cooling air duct with the cooling air flow falling back into the cooling air duct. In addition, the cover can be discharged from the outside impinging water, especially rainwater and lead to a suitable place where it can run well.
• a positioning device may be provided on a mounting side of the inverter, wherein the mounting side of the inverter is aligned normal to the axis of the cooling air passage.
• the positioning device can be set up to set up the inverter on a substantially horizontal surface, so that the cooling air channel is aligned vertically after assembly of the inverter.
• the inverter can be operated as a standalone unit, whereby the installation and commissioning is considerably simplified, especially if the inverter has a high rated power in the range of a few dozen kilowatts and a correspondingly high dead weight.
• the positioning device is adapted to suspend the inverter on a wall, so that after a
• Mounting the mounting side of the inverter is parallel to the wall and the cooling air duct of the inverter is aligned perpendicular to the wall.
• Fig. 1 shows an inverter according to the invention with a housing in one
• Fig. 2 shows an inverter according to the invention with a housing in one
• FIG. 3 shows a further exploded view of an inverter according to the invention
• 4a shows a detailed view of a connecting channel between housing parts of an inverter according to the invention in an exploded view
• connection channel 4b shows a detailed view of the connection channel in an exploded view
• Fig. 5 shows an inverter according to the invention in a wall mounted state
• Fig. 6 shows a fan unit of an inverter according to the invention.
• the housing parts 1 1 to 14 are each disposed adjacent to each other and thereby form a substantially rectangular arrangement.
• the first housing part 1 1 has DC terminals 15 can be connected to the DC lines of a generator, such as a photovoltaic generator.
• the DC terminals 15 each comprise in pairs for positive and negative polarity provided connector, wherein a pair of generators can be connected to each pair.
• electrical, electronic or electro-mechanical components may be arranged, in particular a DC circuit breaker 24 (see Fig.
• the second housing part 12 is arranged opposite to the first housing part 1 1 and aligned substantially parallel thereto.
• the second housing part 12 has AC terminals 16, to which AC lines can be connected, which may be part of an AC voltage network, in particular, so that the inverter 10 in an AC, which is generated from the received via the DC terminals 15 DC power in a Can supply AC voltage network.
• electronic or electromechanical components may be arranged, in particular an AC circuit breaker 25 and here for clarity not shown fuses and overvoltage protection devices and winding goods for storage and / or filtering of the alternating current generated by the inverter 10.
• the third housing part 13 adjoins with its side surfaces on the rear sides of the first housing part 1 1 and the second housing part 12 and is insofar between the housing divide 1 1, 1 2 arranged.
• the components of which may include in particular power electronic semiconductor switches, storage capacitors and control electronics, are not shown here for clarity.
• connectable generators can also be arranged in the third housing part 12 a plurality, in particular parallel-connected DC-DC converter.
• the fourth housing part 14 is arranged opposite to the third housing part 13, aligned substantially parallel thereto and adjoins with its side surfaces on the rear sides of the first housing part 1 1 and the second housing part 12 and is thus arranged between the housing parts 1 1, 1 2.
• Within the fourth housing part 14 at least one inverter bridge circuit is arranged, whose components, in particular power electronic semiconductor switches, storage capacitors and
• a plurality of inverter bridges in particular in parallel, to be arranged in the fourth housing part 14.
• the housing parts 1 1 to 14 may also be arranged such that the side surfaces of the first housing part 1 1 and the second housing part 1 2 adjoin the back sides of the third housing part 13 and / or the fourth housing part 14, so that the first Housing part 1 1 and / or the second
• Housing part 12 between the third housing part 13 and the fourth housing part 14 are arranged.
• the housing parts 1 1 to 14 are arranged such that a cooling air channel 17 is formed with a substantially rectangular cross-section through their rear walls. Within this cooling air channel 17, a heat sink 18 is arranged. At least some of the power electronic components arranged in the third housing parts 13 and the fourth housing part 14, in particular those which generate significant heat loss during operation and therefore require extended cooling, are arranged in these housing parts 13 and 14 in such a way that they are in thermal contact to the heat sink 18, so that the heat loss generated by these power electronic components can be discharged through the heat sink 1 8 to the environment.
• FIG. 2 shows an embodiment of an inverter 10 according to the invention in an exploded view.
• the housing parts 1 1 to 14 are here simplified and spaced apart from each other, as they may be present, for example, prior to assembly of the inverter 10.
• the heat sink 18 is formed by cooling ribs 27 which are connected to the rear Pages of the third housing part 13 and the fourth housing part 14 are arranged. After assembly of the inverter 10, the opposing fins may be spaced, abutting, or overlapping one another.
• a DC intermediate circuit necessary, which may include a number of capacitors depending on the rated power of the inverter 10.
• the capacitors of the DC intermediate circuit can be arranged either in the third housing part 13 or in the fourth housing part 14 or divided on the housing parts 13 and 14.
• the inverter 10 has a connecting channel 20, which consists here by way of example of two sub-tubes 23a, 23b, wherein the connecting channel 20 itself is indicated in Fig. 2 by a dashed connection of the sub-tubes 23a, 23b and these sub-tubes 21 a, 21 b after the assembly of the inverter 10 abut, overlap or plugged into each other.
• This connecting channel 20 is provided for receiving intermediate circuit connecting lines which connect a first part of a DC voltage intermediate circuit arranged in the third housing part 13 to a second part of the DC voltage intermediate circuit arranged in the fourth housing part 14. Details of an exemplary construction of the connection channel 20 will be disclosed in connection with FIGS. 4a and 4b.
• the housing parts 1 1 to 14 here comprise in each case base body 1 1 a, 12 a, 13 a, 14 a and associated cover 1 1 b, 12 b, 13 b, 14 b.
• the heat sink 18 is designed in this embodiment as a separate, one-piece component and can be produced for example in the form of an extruded profile. Alternatively, the heat sink 18 also consist of several parts, in particular of two opposing extruded profiles. Other manufacturing methods such as die casting are conceivable.
• the heat sink 18 has two cooling surfaces 19 a, 19 b, which are each connected to the cooling fins 27.
• the main body 13a, 14a of the third housing part 13 and the fourth housing part 14 have recesses 26a, 26b, the contour of which is formed such that the cooling surface 19a, the rear wall of the main body 13a and the cooling surface 19b, the rear wall of the main body 14a seals tightly.
• the cooling air duct 17 not denoted in FIG. 3 is thus formed by the cooling surfaces 19a, 19b and the rear walls of the base bodies 11a, 12a.
• the main body 1 1 a of the first housing part 1 1 optionally on another heat sink 28, which is exemplified here as in the rear wall of the main body 1 1 a integrated cooling fins.
• the heat sink 28 as be executed separate component, which can be attached to the rear wall of the main body 1 1 a or fitted in a recess in this rear wall.
• the inverter 10 shown in FIG. 3 has a positioning device 31 disposed on a mounting side of the inverter 10, wherein the mounting side of the inverter 10 is located at one end of the cooling air passage 17 and normal to the axis of the cooling air passage 17 is aligned.
• the positioning device 31 according to FIG. 3 is designed as a base, so that the inverter 10 can be placed on a substantially flat surface, so that a cooling air flow flows through the cooling body 18 in the vertical direction and flows past the further heat sink 28. If a forced ventilation is provided, which may in particular comprise a fan unit 29 according to FIG. 6, the flow direction can be adjusted optionally from the bottom upwards or from the top downwards.
• a cover 33 which covers the cooling air channel 17 and protects against contamination.
• the cooling air flow emerging from the cooling air duct 17 can be deflected by the cover, so that in particular it is prevented that any contaminations, for example with the cooling air flow, leaving the cooling air duct 17, e.g. Particles, fall back into the cooling air duct 17.
• the cover 33 can be discharged from the outside incident water, especially rainwater and lead to a suitable location where it can run smoothly.
• the main body 1 1 1 a, 12 a, 13 a, 14 a may have at their rear walls and / or side walls openings 34 through the cable connections for connecting the housing parts 1 1 to 14 arranged electrical, electronic or electro-mechanical components between the housing parts 1 1 to 14 can be performed.
• the openings 34 are arranged such that an opening 34 in one of the base body 1 1 a, 12a, 13a, 14a each spatially coincide with an opening 34 in one of the respective adjacent base body 1 1 1 a, 12a, 13a, 14a, so that the resulting passage opening can be sealed by means of suitable seals.
• FIG. 4a shows a detailed view of an embodiment of the connection channel 20 which has already been explained in connection with FIG. 2 and is not shown in FIG. 3 for the sake of clarity.
• the connecting channel 20 extends between the rear walls of the base body 13 a and 14 a of the third housing part 13 and the fourth housing part 14 and consists in this embodiment of two sub-tubes 21 a, 21 b, which are inserted after assembly of the inverter 10 into one another.
• the sub-tubes 21 a, 21 b abut after assembly of the inverter 10 and there may be an additional seal at the joint of the sub-tubes 21 a, 21 b provided.
• the sub-tube 21 a After assembling the inverter 10, the sub-tube 21 a extends into the third housing part 13 and the sub-tube 21 b in the fourth housing part 14, so that in particular DC link connecting lines can extend in the connecting channel 20 formed by the sub-tubes 21 a, 21 b to the arranged in the housing parts 13 and 14 arranged parts of the DC voltage intermediate circuit of the inverter 10 with each other.
• FIG. 4b shows a further detail view of the partial tubes 23a, 23b.
• the sub-tubes 23a, 23b have sub-channels 21a, 21b, 21c, which are separated by partitions 22 from each other.
• the outer walls of the sub-tubes and the partitions 22 may have electrically insulating properties, so that DC link lines extending within the sub-channels 21 a, 21 b, 21 c, both against each other and each with respect to the bodies 13 a, 14 a of the third housing part 13 and the fourth Housing part 14 (see Figure 4a) are electrically isolated.
• At least two DC link connection lines are needed, i. one for the positive and one for the negative pole of the interconnector formed by the connection.
• These at least two DC link connecting lines can be arranged in the sub-channels 21 a and 21 b.
• the sub-channel 21 c if present, can accommodate a further intermediate circuit connecting line which connects any center point potentials of the parts of the DC intermediate circuit.
• further lines for example, for on-board power supply or for the transmission of control or communication signals, may be arranged in sub-channel 21 c or in other sub-channels.
• Fig. 5 shows an inverter 10 according to the invention in a mounting position on a wall 32.
• the inverter 10 has a positioning device 31, which is formed in this embodiment as a wall mount.
• the positioning device 31 can be fastened on the mounting side already defined in connection with FIG. 3, for example by means of screws, and on the other hand fixed to the wall 32, for example screwed by means of screws or hung on hooks.
• the mounting side of the inverter 10 is parallel to the wall 32 and the cooling air channel 17 aligned perpendicular to the wall 32, so that a cooling air flow flows through the heat sink 18 in the horizontal direction.
• a forced ventilation may be provided, which may in particular comprise a fan unit 29 according to FIG. 6.
• the flow direction of the cooling air flow can optionally be adjusted away from the wall or towards the wall.
• FIG. 6 shows a fan unit 29 of an inverter 10, wherein the fan unit 29 may have a plurality of fans 29a.
• the fan unit 29 is disposed on the mounting side of the inverter 10 in this embodiment of the inverter 10.
• a fan unit 29a may be mounted on the side of the inverter 10 opposite the mounting side.
• the fan unit 29 is slidably mounted in a direction perpendicular to the axis of the cooling air passage 17, for example, by the fans 29 a are arranged on a common support plate, in particular of the rear sides of the housing parts 1 1 and 12 and / or arranged at the bottom of the housing part 13 Guided tours can be conducted.
• a displacement of the fan unit can be releasably blocked by a locking device 30.
• the locking unit 30 has a rotatably mounted locking lever, with the locking device 30 blocking the displacement of the fan unit 29 in the position shown on the left in FIG. 6, by placing the locking lever in a groove or behind an edge on the rear side of the Housing part 13 engages.
• the locking device 30 in the position shown on the right in FIG. 6 is not locked, so that this would basically permit a displacement of the fan unit 29.
• the fan unit 29 can thus be removed for example for maintenance or repair purposes, without having to disassemble further parts of the inverter.

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• Engineering & Computer Science (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Power Engineering (AREA)
• Inverter Devices (AREA)
• Cooling Or The Like Of Electrical Apparatus (AREA)

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• 2015
  • 2015-09-14 DE DE102015115421.8A patent/DE102015115421A1/de not_active Withdrawn
• 2016
  • 2016-09-14 EP EP16763883.2A patent/EP3187032B1/de active Active
  • 2016-09-14 CN CN201680003372.7A patent/CN107078652B/zh active Active
  • 2016-09-14 JP JP2017522900A patent/JP6654192B2/ja active Active
  • 2016-09-14 WO PCT/EP2016/071726 patent/WO2017046180A1/de not_active Ceased
• 2017
  • 2017-06-16 US US15/625,184 patent/US10110141B2/en active Active

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