Transport system having a mobile part supplied contactlessly with electrical power

Abstract

The invention relates to a transport system having a mobile part supplied contactlessly with electrical power, wherein: the mobile part is movable on a rail, in particular in the rail direction; the mobile part has a secondary winding which is inductively coupled to a primary conductor which is laid along the rail and into which a feed device that acts as a current source impresses an alternating current; the feed device has a housing part and a heat sink; the rail is held by at least one carrier; the carrier has a depression which the heat sink abuts; the housing part rests on legs of the carrier.

Description

[0001] Transport system with a mobile unit powered without contact

[0002] Description:

[0003] The invention relates to a transport system with a mobile unit that is supplied with electrical power without contact.

[0004] It is generally known that in a rail system, a mobile unit can move along a rail.

[0005] The invention is therefore based on the objective of further developing a transport system as efficiently as possible.

[0006] According to the invention, the problem is solved in the transport system according to the features specified in claim 1.

[0007] Key features of the invention for the transport system, in particular the monorail system, are that the transport system is provided with a mobile unit supplied with electrical power without contact, wherein the mobile unit is movable on a rail, in particular in the direction of the rail, wherein the mobile unit has a secondary winding which is inductively coupled to a primary conductor laid along the rail, into which a power supply device acting as a current source induces an alternating current, wherein the power supply device has a housing part and a heat sink, wherein the rail is held by at least one support, wherein the support has a recess against which the heat sink rests, and wherein the housing part rests on legs of the support. It is advantageous that the heat sink rests against the recess, in particular at the bottom of the recess, and thus heat can flow from the heat sink to the support.Since the support is metallic and therefore a good heat conductor, the heat flow is quickly spread across the support, thus transporting the heat away from the heat sink. Furthermore, peak temperatures are quickly buffered due to the high heat capacity. The power supply unit is therefore integrated into the support and can be efficiently cooled due to the direct thermal contact.

[0008] In an advantageous design, the legs at least partially define or border the recess. The advantage here is that the heat sink rests not only on the bottom of the recess but also on the legs, allowing heat to dissipate there as well.

[0009] In a preferred embodiment, the support is positioned on the floor of the system. An advantage of this is that the weight of the rail is transferred via the support, particularly into the floor of the system.

[0010] In an advantageous embodiment, the heat sink projects through the housing part to the support, particularly into the recess. The advantage here is that the heat sink can be brought into direct contact, thus reducing the thermal resistance.

[0011] In an advantageous embodiment, the support has a web on which, on both sides, particularly at both ends of the web viewed in the direction of the rail, a pair of legs is integrally formed or formed. It is advantageous that the heat sink can be arranged in the trough-shaped recess, thus enabling efficient heat transfer.

[0012] In a preferred embodiment, the web and / or the recess extend perpendicular to the rail direction. It is advantageous that the support acts as a stand for the rail.

[0013] In a preferred embodiment, the legs are aligned parallel to each other. This is advantageous because the support is easy to manufacture and has a high load-bearing capacity. In a preferred embodiment, the legs of each pair are aligned oppositely to each other, particularly perpendicular to the rail direction, and especially in a respective horizontal direction. This is advantageous because a large surface area is provided for heat transfer to the ambient air.

[0014] In an advantageous embodiment, the web has a larger extent perpendicular to the rail direction, particularly in the vertical direction, than in the rail direction. The advantage here is that the beam has a high load-bearing capacity.

[0015] In an advantageous embodiment, the support and / or the rail is a continuous casting or a drawn part. The advantage here is that simple manufacturing is possible.

[0016] In a preferred embodiment, the support is made of steel or aluminum, with the heat sink being made of aluminum. The advantage here is the high thermal conductivity provided.

[0017] In a preferred embodiment, the recess is arranged between a first leg of the first pair and a first leg of the second pair. This is advantageous because the feed-in device can be positioned precisely and the heat sink rests against both legs, thus enabling efficient heat dissipation of the inverter's waste heat via the heat sink.

[0018] In an advantageous embodiment, the recess is bounded by the web and by a first leg of the first pair and a first leg of the second pair. An advantage of this is that the beam achieves a high load-bearing capacity.

[0019] In an advantageous embodiment, the recess is oriented perpendicular to the rail direction and / or perpendicular to the direction in which the beam is pulled. It is advantageous that the feed device can be connected to the beam from a horizontal direction, in particular by means of screws. In an advantageous embodiment, the beam is a double-T beam. It is advantageous that a high load-bearing capacity can be achieved.

[0020] In an advantageous embodiment, a web of the beam connects two pairs of legs, each pair having legs that are preferably parallel to each other, particularly those of the T. An advantage of this is that a high load-bearing capacity can be achieved.

[0021] Further advantages arise from the dependent claims. The invention is not limited to the combination of features of the claims. For those skilled in the art, further meaningful combinations of claims and / or individual claim features and / or features of the description and / or the figures will become apparent, in particular from the problem statement and / or the problem arising from a comparison with the prior art.

[0022] The invention will now be explained in more detail with reference to schematic illustrations:

[0023] Figure 1 schematically illustrates a system according to the invention for contactless transmission of electrical power, wherein a feed-in device 1 induces a medium-frequency current into a primary conductor, in particular a line conductor, laid elongated along a rail 3 held by a support 20.

[0024] Figure 2 shows a schematic top view of the attachment of the feed device 1 to the support 20.

[0025] Figure 3 shows a side view of the feed-in device 1.

[0026] As shown in the figures, the system has a rail 3 along which a mobile unit 4, in particular a rail vehicle, can be moved, which has a secondary winding on its underside that is inductively coupled to the primary conductor, in particular a line conductor, laid along the rail and thus enables a contactless, in particular inductive, transmission of electrical power to the mobile unit 4.

[0027] The handset 4 is rail-guided, and can be moved back and forth along rail 3. The traction drive of handset 4 can therefore be powered inductively.

[0028] Preferably, the traction motor of the mobile unit 4, which is designed as an electric motor, is supplied from the secondary winding, in particular via a rectifier with a downstream inverter.

[0029] The rail 3 is preferably arranged horizontally and held by supports 20 spaced apart from each other in the direction of the rail, which are placed and / or fastened to the ground of the system comprising the system.

[0030] The support 20 is preferably designed as a double-T beam, wherein a web arranged centrally on the support 20 connects two pairs of legs, each pair having legs, preferably parallel to each other, at the end of the web. Thus, the legs protrude from both sides of the web and therefore form a recess into which a heat sink 23 of the power supply device projects. In particular, the heat sink 23 rests against the web and thus transfers heat to the support 2, which has a high heat capacity and thus buffers temperature peaks and spreads the heat flow from the heat sink and dissipates it to the ambient air.

[0031] The power supply unit 1 itself has a housing part with which the power supply unit rests on the legs of the support 2 facing the housing part. This ensures, on the one hand, a mechanically stable contact with the support and, on the other hand, improved dissipation of heat loss, since the heat sink is in contact with the metallic support 2, and thus, in particular, with a good heat conductor.

[0032] The housing part of the feed-in device 1 encloses a converter which has a rectifier supplied by the public supply network, whose DC-side connection is connected to the DC-side connection of a particularly single-phase inverter of the converter and whose AC-side connection is supplied from the public supply network.

[0033] The inverter is also enclosed by the housing part of the inverter.

[0034] The AC-side connection of the inverter feeds a gyrator, a four-terminal network comprising inductors and at least one capacitor. These impedances are dimensioned such that the gyrator's resonant frequency matches the frequency of the voltage supplied at the inverter's AC-side connection. In this way, the gyrator, thus configured and operated, acts as a current source on its output side, which feeds the primary conductor, laid out as a current loop, either directly or via a matching transformer. The secondary winding of the handset 4 is inductively coupled to the primary conductor laid along the rail held by the support 2. A capacitor is connected in series or parallel to the secondary winding, dimensioned such that the resonant frequency of the resulting resonant circuit matches the frequency of the voltage supplied at the inverter's AC-side connection.Thus, the power can be transferred with high efficiency.

[0035] As shown in Figure 2, capacitor 21 protrudes from the interior enclosed by the housing part through a recess in the housing part. Another capacitor can be connected in parallel through this recess to fine-tune the resonant frequency.

[0036] The support 2 and the rail 3 are preferably made of steel. The heat sink 23 is preferably made of aluminum.

[0037] In Figure 3, a gap between the support 2 and the power supply unit 1, including its heat sink 23, is shown for better visibility. After the power supply unit is attached using screws that pass through the housing part and are screwed into threaded holes in the support 2, the power supply unit 1 rests directly against the support 2, so the gap disappears.

[0038] In further embodiments according to the invention, the support 2 is made of aluminium and / or the rail 3 is made of aluminium extrusion casting.

[0039] Reference symbol list

[0040] 1 power supply unit 2 carriers

[0041] 3 rail

[0042] 4. Handset, especially rail vehicle

[0043] 20 Bridge

[0044] 21 Capacitor 22 Inverter, in particular single-phase inverter

[0045] 23 heat sinks

Claims

Patent claims:

1. Transport system, in particular monorail system, with a mobile unit (4) supplied with electrical power without contact, in particular inductively, wherein the mobile unit (4) is movable on a rail (3), in particular in the direction of the rail, wherein the mobile unit (4) has a secondary winding which is inductively coupled to a primary conductor laid along the rail (3), into which an alternating current is impressed by a power supply device (1) of the transport system, which acts as a power source, wherein the power supply device (1) has a housing part and a heat sink (23), wherein the rail (3) is held by at least one support (2), characterized in that the support (2) has a recess against which the heat sink (23) rests, wherein the housing part rests on legs of the support (2),in particular wherein a traction motor of the mobile unit (4) designed as an electric motor is supplied from the secondary winding in particular via a rectifier with a downstream inverter.

2. Transport system according to claim 1, characterized in that the legs at least partially limit or border the depression.

3. Transport system according to one of the preceding claims, characterized in that the support (2) is placed on the floor of the system.

4. Transport system according to one of the preceding claims, characterized in that the cooling element (23) projects from the housing part to the support (2), in particular into the recess.

5. Transport system according to one of the preceding claims, characterized in that the support (2) has a web (20) on which a respective pair of legs is formed or formed on both sides, in particular at both ends of the web viewed in the direction of the rail.

6. Transport system according to one of the preceding claims, characterized in that the web (20) and / or the recess extend perpendicular to the rail direction.

7. Transport system according to one of the preceding claims, characterized in that the legs are aligned parallel to each other.

8. Transport system according to one of the preceding claims, characterized in that the legs of each pair are oriented opposite to each other, in particular perpendicular to the rail direction, in particular in a respective horizontal direction.

9. Transport system according to one of the preceding claims, characterized in that the web (20) has a larger extent perpendicular to the rail direction, in particular in the vertical direction, than in the rail direction.

10. Transport system according to one of the preceding claims, characterized in that the support (2) and / or the rail (3) is a continuous casting or a drawn part.

11. Transport system according to one of the preceding claims, characterized in that the support (2) is made of steel or aluminium, wherein the cooling element (23) is made of aluminium.

12. Transport system according to one of the preceding claims, characterized in that the recess is arranged between a first leg of the first pair and a first leg of the second pair.

13. Transport system according to one of the preceding claims, characterized in that the recess is bounded by the web (20) and by a first leg of the first pair and a first leg of the second pair.

14. Transport system according to one of the preceding claims, characterized in that the recess is directed perpendicular to the rail direction and / or perpendicular to the pulling direction of the carrier (2).

15. Transport system according to one of the preceding claims, characterized in that the support (2) is a double-T support, and / or that a web (20) of the support (2) connects two pairs of legs, wherein the respective pair has legs that are preferably parallel to each other, in particular of the T.

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