USE OF A SPOTLIGHT AND SYSTEM WITH ENERGY STORAGE AND SPOTLIGHT

Description

[0001] The invention relates to a system with energy storage and radiators.

[0002] It is generally known that high voltages are dangerous and therefore charged components, especially capacitors, must be discharged before carrying out maintenance or service work.

[0003] From the DE 10 2015 103352 A1 The closest state of the art is a method for stabilizing the mains frequency in a voltage network and infrared radiators.

[0004] From the EP 1 548 207 A1 a motor vehicle parking space is known.

[0005] From the DE 10 2018 000 043 A1 An electric heating system is known.

[0006] From the CH 586 498 A5 A flash tube circuit arrangement is known.

[0007] The invention is therefore based on the object of achieving rapid discharge in a system with energy storage and radiator.

[0008] According to the invention, the object is achieved in the system with energy storage and radiator according to the features specified in claim 1.

[0009] Important features of the invention in the system with energy storage and radiator are that the energy storage is connected to the radiator in an electrically detachable manner, in particular by means of a plug connection or clamp connection, and supplies the radiator with electrical power.

[0010] The advantage here is that a very rapid discharge can be achieved using the radiator. This is because the radiator dissipates much more power to the environment than a conventional braking resistor, especially if the radiator and braking resistor have the same volume. Furthermore, the power radiated by the radiator in the infrared frequency range is distributed differently than the heat dissipated by the braking resistor.

[0011] In an advantageous embodiment, the radiator is an IR radiator, specifically an infrared radiator. This is advantageous in that the radiated power can be directed in a preferred direction by means of a metallic mirror partially surrounding the radiator, so that heat radiation is only emitted in the desired spatial direction. This spatial direction is selected in the system to avoid hazards such as the impermissible heating of fuel canisters or signal electronics.

[0012] In an advantageous embodiment, the energy storage device comprises a double-layer capacitor or is designed as a double-layer capacitor arrangement. This is advantageous in that rapid discharge is possible because the energy storage device can withstand high charging currents and high discharging currents. This is particularly true compared to an accumulator or, in particular, compared to a lead-acid battery.

[0013] In an advantageous embodiment, the radiator has a wire arranged in a tube filled with protective gas, in particular a halogen,

[0014] In particular, the wire is subjected to a current, in particular a significant portion of the current supplied by the energy storage device. The advantage here is that, due to the protective gas, no chemical reaction, in particular no oxidation of the wire, occurs even when the wire is annealed. Thus, the wire can be exposed to very high temperatures, which greatly increases the radiation component of the energy emitted by the wire and thus permits correspondingly high currents, which result in a correspondingly rapid discharge.

[0015] Compared to a resistor, especially a braking resistor, which is exposed to the ambient air, the radiator thus achieves a much faster discharge of the energy storage device. This is supported by the radiator's characteristic curve, which represents the resistance as a function of the voltage applied to the radiator. This characteristic curve exhibits a strongly pronounced PTC behavior. In particular, the differential increase in resistance decreases strictly monotonically with increasing voltage.

[0016] In an advantageous embodiment, the tube is transparent to a portion of the infrared wavelength range. This has the advantage of efficiently dissipating the radiation into the environment.

[0017] In a preferred embodiment, the tube is made of glass. The advantage here is that glass is transparent to infrared radiation, thus enabling efficient radiation.

[0018] According to the invention The system comprises an electrical device having a cover part that is rotatably mounted on a housing part of the electrical device, wherein the radiator is accommodated in the cover part. The advantage here is that the radiator can be arranged on the inside of the cover part and can thus be arranged in a protected interior space by rotating the cover part, in particular by placing the cover part on the housing part. The radiator can therefore be transported in a protected manner. The tubes of the radiator and a mirror, in particular a metal mirror, that partially surrounds the tubes are therefore not exposed to any danger during transport. For operation, the cover part is folded open and the radiator is aligned in the desired direction.

[0019] According to the inventionA rotatably mounted wheel is provided on the housing part, in particular wherein the UITr wheel and / or a wheel axle connected to the wheel in a rotationally fixed manner is rotatably mounted by means of a bearing accommodated in the housing part. This has the advantage that the electrical device is easily movable and can therefore be approached by a control cabinet in which the energy storage device and / or the inverter is / are located.

[0020] In an advantageous embodiment, a handle and / or a telescopic handle is arranged on the housing part. This is advantageous because it makes moving the electrical device easy.

[0021] In an advantageous embodiment, a base is arranged on the housing part at a distance from the axis of rotation of the wheel, In particular, the base touches a plane, in particular a floor surface, wherein the plane is aligned parallel to the wheel's axis of rotation and is spaced from the wheel's axis of rotation by half the outer diameter of the wheel, in particular, the wheel also touches the plane, in particular, the base is arranged between the housing part and the plane. The advantage here is that only a single axis of rotation and thus only two wheels are required when moving the electrical device.

[0022] In an advantageous embodiment, a means for detecting a current flowing through the radiator and / or for detecting the voltage supplying the radiator, in particular the voltage applied to the energy storage device, is arranged on the housing part, in particular is connected to a means for displaying the falling below a threshold value, in particular current and / or voltage. This is advantageous in that a warning can be displayed if critical threshold values ​​are exceeded. In particular, it is also possible to determine the charge state of the threshold value, and thus a display when a threshold value is fallen below, which indicates the discharge of the energy storage device.

[0023] In an advantageous embodiment, a switch for electrically disconnecting the radiator is connected to a means for monitoring the temperature of the electrical device for exceeding a temperature threshold, in particular a critical temperature. This is advantageous because it allows the electrical device to be switched off in the event of an impermissibly high temperature, in particular an overtemperature.

[0024] In an advantageous embodiment, the energy storage device can be connected via a switch to the DC-side connection of an inverter, the AC-side connection of which feeds an electric motor, and / or a DC-side connection of a supply module, in particular a supply module comprising a rectifier or a supply module designed as a rectifier, can be connected to the energy storage device via a switch, in particular electrically connected in parallel to the DC-side connection of the inverter. The advantage here is that the energy storage device absorbs energy during generator operation of the electric motor fed by the inverter, and during motor operation and when the energy storage device is empty, energy can be supplied from the AC voltage supply network via the rectifier of the supply module.To discharge the energy storage unit, the switch is of course open and thus both the DC voltage side connection of the inverter and that of the supply module are electrically separated from the energy storage unit.

[0025] In an advantageous embodiment, the electric motor is a three-phase motor, and the alternating voltage provided by the inverter is a three-phase voltage. The advantage here is that the electric motor can generate high torque and, in generator mode, generates high power, which can be fed into the energy storage system.

[0026] In an advantageous embodiment, the electrical device has a means for determining and displaying a measure of the charge level of the energy storage device, in particular wherein the means is connected to the means for detecting a current flowing through the radiator and / or for detecting the voltage supplying the radiator, in particular for determining the charge level from the detected current and / or voltage curve. It is advantageous that, although the electrical device can be moved separately from the energy storage device by means of wheels, the charge level of the energy storage device can be displayed after the electrical connection to the energy storage device and subsequent discharging of the energy storage device.

[0027] In an advantageous embodiment, the inverter and the energy storage device are each located in a separate or shared control cabinet. This is advantageous because the electrical device for discharging the energy storage device is not located in the control cabinet, but can be transported outside, allowing the heat radiated by the electrical device to be radiated in a preferred direction that can be selected in such a way that no danger is created, particularly of overheating of system components.

[0028] Further advantages emerge from the dependent claims. The invention is not limited to the combination of features in the claims. Further possible combinations of claims and / or individual claim features and / or features of the description and / or the figures will become apparent to those skilled in the art, particularly from the problem and / or the problem posed by comparison with the prior art.

[0029] The invention will now be explained in more detail with the aid of schematic illustrations: In the Figure 1 A system according to the invention is schematically sketched.

[0030] As in the Figure 1 As shown, a supply module 1 fed by an AC voltage supply network provides a DC voltage to a drive.

[0031] The supply module 1 comprises a rectifier, to whose DC voltage side connection the DC voltage side connection of an inverter and an energy storage device arranged in parallel are connected.

[0032] An electric motor is supplied from the AC side connection of the inverter.

[0033] The energy storage device features a double-layer capacitor. In particular, the energy storage device can be operated at high voltages, for example, up to 800 volts or approximately 900 volts. The use of double-layer capacitors allows for high charging and discharging currents.

[0034] However, during service operations, for example, it is necessary to discharge the energy storage device, as it could still provide dangerously high voltages even if the drive is switched off and / or the supply module 1 is disconnected from the AC power supply network.

[0035] To discharge the energy storage device, an electrical device is used, preferably mounted on at least one wheel, which is connected to the potentials of the energy storage device by means of a cable 3. For this purpose, the cables, in particular their respective electrical lines, are connected to the respective terminal of the energy storage device. The electrical lines of the cable are preferably provided as a line for an upper potential and a third line for a lower potential, in particular a protective conductor.

[0036] Preferably, each of the cables 3 has a single line.

[0037] The electrical device has a radiator 5, to which the current conducted via the cables 3 is fed. In this way, a large electrical power can be converted into radiation, especially thermal radiation.

[0038] In contrast to so-called braking resistors, radiator 5 features a wire with an electrical resistance arranged in a tube filled with protective gas. The tube is as transparent as possible for a large portion of the radiation.

[0039] A halogen is preferably used as the halogen.

[0040] Even when the wire is glowing, the shielding gas prevents oxidation. This allows the wire to be subjected to a strong current, allowing the energy storage device to be discharged quickly.

[0041] Preferably, the essential part of the radiation power emitted by the radiator 5 is in the infrared range, in particular the infrared frequency range.

[0042] The wire is made of a preferably metallic alloy.

[0043] Further preferably, the radiator 5 is arranged on the inside of a rotatably arranged cover part of the electrical device. Thus, when the radiator is in operation, the radiation can be emitted upwards or diagonally upwards. This prevents the radiation from the radiator 5 from heating the signal electronics and the power electronics of the inverter of the drive 2 or the supply module 1, thus endangering them.

[0044] After operation, the cover can be folded back and thus placed in a protected interior of the electrical device. This allows the spotlight 5 to be transported safely on the mobile electrical device and can be easily and effortlessly moved to a drive, electrically connected, and the energy storage device discharged.

[0045] In particular, the radiator 5 is designed as an infrared radiator.

[0046] The inverter features controllable semiconductor switches arranged in half-bridges, which preferably provide a three-phase voltage at the AC side, from which the electric motor is powered. For this purpose, the inverter's signal electronics generate pulse-width modulated control signals for the controllable semiconductor switches.

[0047] The electrical device has a base 7 which is spaced from the axis of rotation of the wheel 6 so that the electrical device can be placed on a floor, whereby a stable position can be achieved and rolling away of the electrical device can be prevented.

[0048] The electrical device has a handle 4 on its cover part, which allows easy pulling or pushing of the device using the wheel 6.

[0049] In further embodiments according to the invention, a telescopic handle is arranged on the electrical device instead of the handle 4, in particular on the housing part of the electrical device on which the cover part is rotatably mounted. This allows for simple and safe handling of the electrical device. Furthermore, a thermal switch can be arranged within the housing part, so that the radiator can be switched off, i.e., electrically disconnected, if a temperature threshold is exceeded.

[0050] An emergency stop switch can also be attached to the electrical device.

[0051] In further embodiments according to the invention, the current supplied to the radiator 5 and / or the voltage supplying the radiator 5 is detected in the electrical device. From the temporal progression of these detected current and / or voltage values, a measure of the charge level of the energy storage device, i.e., the energy stored in the energy storage device, is determined. This measure and / or the undershoot of a threshold value by the measure can be visually and / or acoustically indicated by a display arranged on the electrical device. In this way, the end of the discharge process can be signaled.

[0052] In this case, either the nominal capacity of the energy storage device is stored as a parameter in a memory of the electrical device, or the electrical device has no information whatsoever about the capacity of the energy storage device. In the latter case, the instantaneous electrical power supplied to the radiator 5 is determined from the current supplied and recorded to the radiator 5 and from the voltage applied to the radiator. From the temporal progression of this power, it is evident that this power is decreasing, whereby from the change in power per unit of time and the power currently dissipated to the radiator 5, a time period can be estimated after which the energy storage device will only deliver a fraction of the currently dissipated power. Thus, using the time period or the fraction, a point in time can be determined at which the energy storage device is considered discharged, and this can be indicated accordingly using the display means of the electrical device.

[0053] The electrical device has a switch with which the radiator 5 can be electrically disconnected.

[0054] The electrical device is connected to the energy storage device, in particular a capacitor, such as a double-layer capacitor, in particular an ultracap, by means of the cable 3, after the energy storage device has been separated from the DC voltage side connection of the inverter of the drive 2 by means of controllable switches, in particular contactors. List of reference symbols

[0055] 1 Supply module, in particular comprising a rectifier 2 Drive, in particular comprising an electric motor fed by an inverter 3 Cable 4 Handle 5 Spotlight 6 Wheel 7 Stand

Claims

1. System comprising an energy store and an emitter (5), wherein the energy store is electrically detachably connected to the emitter, in particular by means of a plug-in connection or a clamping connection, and electrically powers the emitter, characterized in that the system comprises an electrical device, which has a lid part that is rotatably mounted on a housing part of the electrical device, wherein the emitter is accommodated in the lid part, wherein a rotatably mounted wheel (6) is provided on the housing part in order to move the electrical device.

2. System according to claim 1, characterized in that the emitter is an IR emitter, i.e. in particular an infrared emitter.

3. System according to any one of the preceding claims, characterized in that the energy store comprises a double-layer capacitor or is designed as a double-layer capacitor arrangement.

4. System according to any one of the preceding claims, characterized in that the emitter comprises a wire arranged in a tube filled with protective gas, in particular with a halogen, in particular wherein a current, in particular a substantial proportion of the current delivered by the energy store, is applied, in particular will be applied, to the wire.

5. System according to any one of the preceding claims, characterized in that the tube is designed to be transparent to a region of the infrared wavelength range, and / or in that the tube is made of glass.

6. System according to any one of the preceding claims, characterized in that the wheel and / or a wheel axle rotatably rigidly connected to the wheel is rotatably mounted by means of a bearing, which is accommodated in the housing part.

7. System according to any one of the preceding claims, characterized in that a handle (4) and / or a telescopic handle is arranged on the housing part.

8. System according to any one of the preceding claims, characterized in that a foot (7) is arranged on the housing part at a distance from the axis of rotation of the wheel, in particular wherein the foot contacts a plane, in particular a floor surface, wherein the plane is oriented parallel to the axis of rotation of the wheel and is arranged at a distance of half of the external diameter of the wheel from the axis of rotation of the wheel, in particular wherein the wheel also contacts the plane, in particular wherein the foot is arranged between the housing part and the plane.

9. System according to any one of the preceding claims, characterized in that a means for detecting a current flowing through the emitter and / or for detecting the voltage powering the emitter, in particular the voltage applied to the energy store, is arranged on the housing part, in particular is connected to an indicator means which is suitable for indicating when there is a drop below a threshold, in particular with regard to current and / or voltage.

10. System according to any one of the preceding claims, characterized in that a switch for electrically disconnecting the emitter is connected to a means for monitoring a temperature of the electrical device with regard to exceeding a temperature threshold, in particular a critical temperature.

11. System according to any one of the preceding claims, characterized in that the energy store is connected via at least one controllable switch, in particular a contactor, to the DC voltage terminal of an inverter, the AC voltage terminal of which powers an electric motor, in particular wherein the controllable switch is arranged in a housing surrounding the energy store, and / or wherein a DC voltage terminal of a power supply module, in particular a power supply module comprising a rectifier or a power supply module designed as a rectifier, is connected to the energy store, in particular is electrically switched in parallel with the DC voltage terminal of the inverter.

12. System according to claim 11, characterized in that the electric motor is a three-phase motor and the AC voltage provided by the inverter is a three-phase voltage, and / or in that the electrical device comprises a means for determining and indicating a measure of the state of charge of the energy store, in particular wherein the means is connected to the means for detecting a current flowing through the emitter and / or for detecting the voltage powering the emitter, in particular in order to determine the state of charge on the basis of the detected current curve and / or voltage curve, and / or in that the inverter and the energy store are each arranged in a respective or shared control cabinet.

13. Method for operating a system according to any one of claims 11 or 12, characterized in that in a first method step the energy store is disconnected from the DC voltage terminal of the inverter by means of the controllable switch, in a second method step, which temporally follows the first, the emitter is connected to the energy store by means of a cable, and by closing a switch arranged in the electrical device the emitter is electrically connected to the energy store, in particular in order to discharge the energy store.