WO2018158235A1

WO2018158235A1 - Current collector with compensating contacts

Info

Publication number: WO2018158235A1
Application number: PCT/EP2018/054778
Authority: WO
Inventors: Florian BÜHS; Thomas Stark
Original assignee: Siemens Aktiengesellschaft
Priority date: 2017-03-03
Filing date: 2018-02-27
Publication date: 2018-09-07
Also published as: DE102017203510A1; DE112018001118A5

Abstract

The invention describes a current-collecting device (20) for a contact line system (1). The current-collecting device (20) comprises a current collector (4) which has a contact element (4a) with two electrical contacts (4aa, 4ab) for making electrical contact with a contact line (1) and has two compensating contacts (7) for short-circuiting the two electrical contacts (4aa, 4ab) in an operating state in which the electrical contact of the contact element with the contact line is interrupted. The invention also describes a non-rail-bound electrified transportation vehicle (3). The invention further describes an electrified transportation system (10). The invention additionally describes a method for moving a current collector (4) having a contact element (4a) with two electrical contacts (4aa, 4ab) to a safe state.

Description

description

Current collectors with compensation contacts The invention relates to a current collection device. Furthermore, the invention relates to a non-rail-bound elek ^¬ trifiziertes transport vehicle. In addition, the invention relates to an electrified transport system. Moreover, the invention relates to a method for transferring a current collector with a contact element with two electrical contacts in a safe state.

Electric transport systems for the transport of goods and persons with catenaries for the supply of electric vehicles are used in many different variants. The use of lane-bound supply systems for non-rail vehicles usually uses DC-powered overhead line systems. These have the advantage of a smaller space requirement of the vehicle components and increased safety. The overhead lines are arranged over electrified lanes and are contacted by electrified commercial vehicles with the help of pantographs, also called pantographs. In certain transport applications, however, single-pole overhead lines are also used in which the vehicle as energy carrier can be fed back into the overhead line.

When servicing the electrical equipment of the electrified commercial vehicles, some safety rules should be followed to avoid electrical accidents. The security rules to be observed can be summarized in the core to five security rules. Before starting work on the pantograph, an unlocking process should first be carried out, in which the pantograph is electrically separated from electrical consumers and storage units. In addition, the components of the pantograph to be processed should be short-circuited to each other and earthed. Farther the pantograph should be protected against inadvertent reconnection, ie unintentional electrical connection of the electrical consumers and storage units with the pantograph, during maintenance. 5 Moreover, should be covered neighboring units that are live Bauele ^¬ ments or cordoned off.

So far, the said safety precautions were carried out by active intervention of the maintenance personnel. This carries all ^¬ l ei recently the risk that safety measures forget or are not performed for convenience, so that the Si ^¬ safety of the maintenance personnel is not adequate ^¬ anteed.

15 So there is a problem with having a pantograph for

To develop non-rail vehicles, which provides improved safety during maintenance.

This object is achieved by a power take-off device according to 20 claim 1, a non-rail-bound electrified transport vehicle according to claim 9, an electrification ^¬ ed transport system according to claim 10 and a method for transferring a current collector with a contact ^¬ element having two electrical contacts to a safe supply 25 was solved according to claim 11.

The current collection device according to the invention for a catenary system comprises a current collector, which is arranged on an electrified vehicle. As a catenary system

30 is in this context, a line system for the continuous supply of electric vehicles with electrical energy, especially during driving ver ^¬ stood. In this case, the supply of a vehicle with electrical energy via an electrical contact of the

35 catenary system with the pantograph. The current collector has a contact element with two electrical contacts for making electrical contact with a contact line. As electrical contacts to electrical in this context Components such. As sliding contacts, are understood, with which an electric current can be obtained from a catenary by a mechanical and thus electrical contact with this. In this context, a contact element is to be understood as meaning a component of the current collector which comprises an electrically conductive carrier, also referred to as a contact carrier, or an electrically conductive carrier element, for example a rocker. As already be ^¬ mentioned, the contact element also includes two on or formed on the electroconductive support electrical contacts which are electrically connected to the electrically conductive support. In addition, the current collection device according to the invention has two compensation contacts for short-circuiting the two electrical contacts of the contact element of the current collector in an operating state in which an electrical contact or an electrical connection of the contact element to the contact line is interrupted. The balancing contacts may, for example, be positioned on a base on which the current collector is also arranged. The base can z. B. on the roof of a vehicle on which the current collection device is arranged to be arranged.

The balancing contacts are only in the operating state in which an electrical contact between the electrical contacts of the contact element and the contact line is interrupted, in electrical contact with the contact element of

Pantograph. An electrical contact between the contact element and the balancing contacts can, for. B. be achieved by establishing an electrical contact between the electrical contacts of the contact element of the pantograph and the balancing contacts. The latter operating state is to be hereinafter also referred to as idle ^¬ be. The short-circuiting of the two electrical contacts using the balancing contacts can, for. B. be achieved in that the two compensating contacts ^{miteinan ¬ are} electrically connected so that potential differences between the two electrical contacts of the Kontaktele- ment can be compensated by a current flow between the two balancing contacts. For example, the two equalizing contacts can also be connected to a uniform or common, preferably fixed reference potential.

In this situation, the electrical contacts of the contact element are short-circuited with each other, so that any possible charge difference of the different electrical fresh contacts is compensated. In this way, the safety of the maintenance staff can be improved because after the charge equalization the risk of electric shock is greatly reduced at a touch of the pantograph. The non-rail electrified transport vehicle according to the invention has an electric traction drive, for example an electric motor, and an inventive current collection device for supplying the electric traction drive with electrical energy. The non-rail-nengebundene electrified transport vehicle may be an electrified road vehicle In ^¬ play for that elec ^¬ tric power from an overhead line, preferably an overhead line relates. The electrified transport system according to the invention has a catenary system and at least one non-rail electrified transport vehicle according to the invention. As a transport vehicle to be understood in this context, both a vehicle for the transport of persons, such as a bus or passenger car, as well as a vehicle for the transport of goods, such as a truck.

In the inventive method for transferring a current collector with a contact element with two electrical contacts in a safe state, an electrical contact between a catenary and the contact element is interrupted. This process takes place by a hardening of the Pantograph from overhead contact line. The pantograph is thereby moved from a position close to the driving line to a position close to the vehicle. Then, the two electrical contacts in an operating state in which an electrical contact between the contact element and the catenary is interrupted, short-circuited by establishing an electrical contact between the two electrical contacts and a respective balancing contact. The short-circuiting of the two electrical contacts by means of the compensating contacts can, as already mentioned, for. B. thereby be ^¬ ranges that the two equalizing contacts are electrically connected to each other, so that potential differences between the two electrical contacts of the contact element can be compensated th th by a current flow between the two Ausgleichskontak-.

The dependent claims and the following description each contain particularly advantageous embodiments and further developments of the invention. The claims of claim category may also be further formed in accordance with depen ^¬ Gigen claims of a different category of claim and the description parts in particular. In addition, in the context of the invention, the various features of different embodiments and claims can also be combined to form new embodiments.

Preferably, the Stromabnahmeeirichtung invention is designed for a two-pole contact line. In this ^embodiment , the power take-off ^device according to the invention comprises a contact element with two electrical contacts for the electrical contacting of different poles of a two-pole contact line. The two compensating contacts are also used here for short-circuiting the two electrical contacts in an operating state in which the electrical contact of the contact element is interrupted with the two-pole overhead line. Particularly safe is the invention Stromabnahmeein ^¬ direction when a common electrical connection of the two compensation contacts to ground, for example, re alisiert by a vehicle chassis, having ^¬. In this variant, in idle state not only a charge balance between the different contacts of the current collector, but it will eventually residual charges are derived to ground, so that the danger of a Wartungsvor ^¬ gang at a touch of the pantograph an electrical see electric shock get even further reduced.

In a particularly advantageous embodiment of the current collection device according to the invention, the current collection device has an electrical separation device between the current collector and electrical consumer units and / or electrical storage units of an electrified vehicle comprising the current collection device. The electric separating means may for example comprise a switch which is open in the rest state, so that, when maintenance work was ^¬ no current from the electric storage unit can flow to the current collector and can eventually compromise the maintenance personnel. In addition, in this way a ground fault of the electric power storage can be avoided via the equal contacts ^¬ . In the case of such a ground ^fault , the electric current store would otherwise be ^discharged and possibly even damaged. In such a case Un ^¬ In addition, there is also a fire hazard.

Preferably, the current collection device according to the invention has a contact sensor for monitoring an electrical contact between the contact element and the contact line. The contact sensor serves to detect the ironing or ironing of the current collector from or to a contact line and to use it for control measures. For example, the switch described the separator for the

Case of detected Abbügelns a pantograph be geöff ^¬ net, so that flow during maintenance no current from the electric storage unit to the current collector can and possibly endanger the maintenance personnel. As already mentioned, by opening the switch of the separating device, a ground fault of the electric current store can be avoided via the compensating contacts. In the event of a detected Anbügelns the pantograph, the switch of the separator is closed, so that an electric current can flow from the pantograph to the consumers or the electrical energy storage. In a variant of the current collection equipment according to the invention, the power take-off device a control device which is adapted in dependence on a sensor signal of the contact sensor, the separation device or egg ^¬ nen by the separating means included switch on and switch off. The control device can also be used in addition to

Control of the Anbügel- and Abbügelvorgangs the pantograph be used.

In one embodiment of the invention Stromabnahmeein- device, the current collector on a Tragarmeinheit which is adapted to contact the electrical contact element in an active operating condition with the catenary and the electrical contact element in a rest state ^¬ removed from the catenary and in the electrical Kon- Position the contact with the two equalizing contacts in a vertical position. The support unit may for example consist of two folding arms or support arms, which are unfolded for the ironing of the pantograph and are folded when the turn of the pantograph. The said mechanical movements can be controlled and controlled via the described control device.

In a special variant of the current collection equipment according to the invention, therefore, the control device a movement of a support arm of the support unit in egg ^¬ nem change between an active operating state and an idle state is directed einge- to control. Said control device detects via sensors the state (position / position, electrical safety) of the current collection device or in particular the position and position of the contact element of the current collection device and outputs control signals to the actuators. The control device detects HMI signals and outputs information via the human machine interface (HMI).

About the control device, the communication with the vehicle control.

The invention will be explained in more detail below with reference to the beige ^¬ added figures using ^exemplary embodiments. Show it:

1 shows a side view of a road-bound electrified transport system with a vehicle having a power take-off device according to an embodiment of the invention in an active state,

2 shows a side view of the narrow straß ^¬ electrified-bound transport system shown in FIG 1, wherein the current collection equipment is in an idle state,

3 is a view of a current collection device according to an embodiment of the invention in the active state and viewed in the direction of travel,

4 shows the power take-off device shown in FIG. 3 at rest;

5 shows a flow chart, which illustrates a method for transferring a current collector with a contact element with two electrical contacts for a two-pole catenary system into a safe state according to an embodiment of the invention. 1 shows a side view of a road-bound elec ^¬ trifiziert transport system 10 is shown with a vehicle with a current collection device 20 according to an embodiment of the invention in an active state. The electric fied transport system 10 includes a two-pole Fahrlei ^¬ device 1 with a positive and a negative polarity contact wire la, lb (see Figures 3, 4) and a track 2 on which an elec ^¬ trifiziertes road vehicle 3, in this embodiment, an electrified trucks moves. The electrified truck 3 comprises the already mentioned Stromabnah ^¬ meeinrichtung 20. The power take-off device 20 has a current collector 4 with a pantograph rocker 4a, also referred to as a contact element, on. The pantograph rocker 4a is in the active operating state of the electrified truck 3 each in electrical contact with the two differently polarized contact wires la, lb (see FIG 3). The pantograph head 4a includes electrical contacts 4aa, 4ab (see also Figures 3, 4) which 4a make electrical contact between the individual differently poled contact wires la, lb and corresponding electrically separated from one another during the active Betriebszu ^¬ stands portions of the pantograph head.

In this condition, the pantograph 4 is extended, i. the contact rocker 4a is located in a height position far above the vehicle roof. The power take-off device 20 also has a power supply line 5, which extends from the contact rocker 4a down through the truck 3 to a power storage and / or to an electric motor (not shown). In order to be able to disconnect the current collector 4 from the current storage device and / or the electric motor, the current collection device 20 also has a separating device 6 with a switch which, for example, can be referred to as a so-called

Contactor is formed. The contactor 6 is installed in the already mentioned power supply line 5 between the current collector 4 and the consumers (not shown). Part of the current collection device 20 are also so-called compensation ^¬ contacts 7, which, however, when the pantograph 4 ausge- is not in contact with the pantograph 4. The balancing contacts are positioned on a base on which the current collector 4 is arranged. In FIG 2 is electrified-road transport system 10 already shown in Figure 1 shown in a situation in which the vehicle 3 in a state of rest befin ^¬ det, for example, to perform maintenance on it. The current collection device 20 is deactivated in this state. That is, the pantograph 4 is retracted, the contact rocker 4a is removed from the contact wires la, lb of the catenary 1 and rests on the top of the electrified load ^¬ vehicle 3. In this state, the contact rocker 4a rests on the compensating contacts 7, which contact the contact rocker 4a and short-circuit the two electrical contacts 4aa, 4ab (see FIG. 4) of the contact rocker 4a and electrically connect them to ground, ie to the vehicle chassis. To ^¬ addition, the switch of the separator 6 is open, so that in this situation there is no electrical connection between the pantograph 4 and the consumers, ie in particular the electric motor and the electric energy storage. In particular, the electrical energy ^¬ memory is also electrically isolated from the balancing contact, so that during maintenance no electrical current can flow from the electrical energy storage to ground.

In FIG 3, a current collection device is shown 20 according to an embodiment in the direction of travel and in the active state ge ^¬. That is, FIG. 3 corresponds to the situation shown in FIG. From the perspective shown in Figure 3, the two are connected to different poles la, lb of the overhead line 1 in electrical contact electrical contacts 4aa, 4ab of the contact rocker 4a of the current collector 4 of the Stromabnah ^¬ meeinrichtung 20 to recognize. Power supply lines 5a, 5b, which separate, mutually insulated leads or Be ^¬ constituents shown in Figures 1 and 2 power supply ^¬ line 5 represent, extending from the electrical contacts 4aa, 4ab loading to the current collector 4 along up to the already mentioned separation device 6, 5b each having a separate switch 6a, 6b for the two differently polarized power supply lines. Assigned to each of the two electrical contacts 4aa, 4ab are below the contact rocker 4 equalizing contacts 7, wel ^¬ che are short-circuited with each other and are also connected together to the vehicle ground

In FIG 4, a power take-off device 20 according to an exemplary embodiment in the direction of travel and in the idle state is shown. That is, FIG 4 corresponds to the embodiment shown in FIG 2 ^¬ situ ation. In FIG. 4, the two electrical contacts 4aa, 4ab of the contact pick-up 4a of the current collector 4 of the current-collecting device 20, which are in electrical contact with different poles 1a, 1b of the contact line 1, are shown at rest. FIG. 4 also illustrates the power supply lines 5 a, 5 b already shown in FIG. 3, which run from the electrical contacts 4 a, 4 a to the current collector 4 as far as the already mentioned separating device 6, which for the two differently polarized power supply lines 5 a, 5b each have a separate switch 6a, 6b. Assigned to each of the two electrical contacts 4aa, 4ab are located in the idle state directly with the electrical contacts 4aa, 4ab in electrical contact balancing contacts 7, which are shortge ^¬ closed together and are also electrically connected together to the vehicle ground. In the situation shown in FIG. 4, the separating device 6 or its individual switches 6a, 6b are open, so that in this situation there is no electrical connection between earth and the consumers, ie in particular the electric motor and the electrical energy store.

In FIG 5, a flowchart 500 is shown, which is a procedural for transferring a current collector for a two-poli ^¬ ges catenary system in a safe state according to an embodiment of the invention is illustrated. In the method, first, at step 5.1, a control Device given a control signal to the pantograph to perform a Abbügelvorgang, that is, to put the pantograph from the position shown in Figure 1 in the position shown in Figure 2 and to end an electrical contact between the pantograph and a catenary of the catenary system. In step 5, the current collector II confirm the start of a Abbügelvorgangs by a Ant ^¬ word signal to the control device, which summarizes the contents environmentally that the Abbügelvorgang is started. In which

Step 5. III, the bending process is performed so that the pantograph is disconnected from the overhead line. In step 5.IV it is determined by means of a contact sensor that the bending process has been carried out. Then, in step 5.V power supply lines, which run from the current collector to electrical consumers, such as an electric motor and an electrical energy storage, separated from the electrical loads by opening a circuit breaker. In the quiescent state is the clock Kon ^¬ pantograph bow, as shown in FIG 4, to compensate contacts, so that the different electrical contacts of the contact rocker are shorted together and are connected to ground. At step 5. VI maintenance of the current collector is performed, whereby there is no danger of electrical shock for service personnel on ^¬ due to the safe storage of the pantograph.

It is finally pointed out again that the described devices and methods are merely preferred embodiments of the invention and that the invention can be varied by the person skilled in the art without departing from the scope of the invention, as far as it is predetermined by the claims. For the sake of completeness, it is also pointed out that the use of indefinite articles does not exclude "a" or "one", that the characteristics in question can also be present multiple times. Similarly, the term "unit" does not exclude that it consists of several components, which may also be spatially distributed.

Claims

claims

1. power take-off device (20) for a catenary system (1), which comprises

a current collector (4) having a contact element (4a) with two electrical contacts (4aa, 4ab) for making electrical contact with a contact line (1),

two compensating contacts (7) for short-circuiting the two electrical contacts (4aa, 4ab) in an operating state in which an electrical contact between the contact element (4a) and the contact line (1) is interrupted.

Second power take-off device according to claim 1, wherein the catenary system (1) is formed as a two-pole catenary system.

3. Current collection device according to claim 1 or 2, comprising a common electrical connection of the two equal contacts ^¬ (7) to ground.

4. power take-off device according to one of the preceding claims, comprising an electrical separator (6) between the current collector (4) and electrical consumer units and / or electrical storage units of a current collection device comprising electrified vehicle (3).

5. power take-off device according to one of the preceding claims, comprising a contact sensor for monitoring an electrical contact between the contact element (4a) and the catenary (1).

6. power take-off device according to claim 4 and 5, comprising a control device which is adapted to turn on or off depending on a sensor signal of the contact sensor, the electrical separating device (6).

7. Current collection device according to one of the preceding claims, wherein the current collector (4) has a support unit ^¬ , which is adapted to bring the electrical contact ^¬ element (4a) in an active operating state with the control line (1) into contact and the electrical con ^¬ tact element (4a) removed in a resting state of the catenary (1) and to position in electrical contact with the two equal from ^¬ contacts (7) standing.

8. power take-off device according to claim 7, wherein the control device is adapted to control a movement of a support arm of the support unit in a change between the akti ^¬ ven operating state and the idle state.

9. Non-rail electrified Transportfahr ^¬ stuff (3), comprising:

an electric traction drive,

a power take-off device (20) according to one of claims 1 to 8 for supplying the electric traction drive with electrical energy.

10. An electrified transport system (10), comprising:

a catenary system (1),

at least one electrified transport vehicle (3) according to claim 9.

11. A method for transferring a current collector (4) with a contact element (4a) with two electrical contacts (4aa, 4ab) in a safe state, comprising the steps:

Interrupting an electrical contact between a contact line (1) and the contact element (4a),

Short circuiting the two electrical contacts (4aa, 4ab) in an operating state in which the electrical contact between the contact element (4a) and the catenary (1) is interrupted, by establishing an electrical contact between the two electrical contacts (4aa, 4ab) and each a balancing contact (7).