Emergency power supply for an electrical component of a door or window

Abstract

Emergency power supply device for supplying an electrical component of a door (1) or window, i.e. a lock (22), and / or a drive (23), and / or a latch, and / or a door opener (21), wherein the electrical component (21, 22, 23) is supplied with a supply voltage via a supply line (31) during normal operation, and comprising an energy storage device (32) comprising at least one capacitor (321), wherein the energy storage device (32) is connectable to the supply line (31) and is charged via the supply line (31) during normal operation, as well as with a voltage converter circuit (4), characterized by that the voltage converter circuit (4) switches to emergency power supply in the event of disturbances or failures of the supply voltage and supplies the electrical component (21, 22, 23) with electrical energy by discharging the at least one capacitor (321); that in normal operation the supply is provided via the supply line (31) through a house network and a power supply unit; that the voltage converter circuit (4) increases the supply voltage in order to charge the at least one capacitor (321) with a higher voltage than the supply voltage; and that in emergency operation or for emergency power supply the voltage converter circuit (4) decreases the voltage of the at least one capacitor (321) in order to supply the electrical component (21, 22, 23) with electrical energy.and that the lock (22) or the drive (23) or the door opener (21) automatically switches to emergency operation and to a predetermined emergency state when supplied with emergency voltage, and that in emergency operation an emergency current with an emergency voltage lower than the regular supply voltage of the supply line is provided, and that the at least one capacitor (321) has a voltage withstand rating of at least 35 V or at least 50 V or at least 63 V.

Description

[0001] The invention relates to an emergency power supply device for supplying an electrical component of a door or window according to the features of the preamble of claim 1.

[0002] In practice, the electrical components of a door or window primarily refer to drives and / or locking mechanisms such as door closers and / or locks or hold-open devices. To ensure that the door or window functions properly and remains accessible even in emergencies, such as power outages, fires, or other power supply disruptions, emergency power supplies are used. It is essential that the emergency power supply provides sufficient energy to operate the door or window correctly or to bring it into a defined state.

[0003] From EP 2 871 307 A1, a device for the electrical supply of a motor-operated lock of a door is known, which has an energy storage device comprising at least one capacitor and which is designed so that in the event of a power failure or interruption, the motor can be operated electrically, for example to unlock the lock.

[0004] EP 3 337 008 A2 also depicts an emergency power supply unit for a door system. The emergency power supply unit described here has a modular design and can be expanded to provide sufficient energy for emergency operation. Here, too, a key feature is that the stored energy enables a complete unlocking or locking process of the door system.

[0005] From DE 20 2010 006 954 U1, a closing device for doors or windows with a motorized drive unit is known. It is further described that the power supply unit has a self-contained power supply buffer component, which is dimensioned such that at least emergency operation is possible in the event of a power failure.

[0006] From DE 195 42 085 B4 an emergency power device for vehicles is known, with a capacitor for energy storage and with at least one voltage converter.

[0007] From US patent 2010 / 0031714A1, a battery-operated electronic door lock comprising a locking mechanism, a key card reader, and a programmable controller with emergency operation is known.

[0008] From DE 10 2013 108.526 A1 a device for a door for the electrical supply of an electrical component with a supercapacitor is known.

[0009] In practice, it is necessary to store sufficient electrical energy in an emergency power supply device for emergency operation. This requirement conflicts with the required size and the associated costs. The object of the present invention is to provide an emergency power supply device that exhibits high reliability and operational safety in an emergency, yet is cost-effective to manufacture and, in particular, requires relatively little installation space.

[0010] This problem is solved according to the invention by an emergency power supply device having the features of claim 1. Furthermore, the problem is solved according to the invention by a method for supplying a door lock, a door drive, or a door opener according to the features of claim 16.

[0011] According to the invention, an emergency power supply device is proposed for supplying an electrical component of a door or window, i.e., a lock and / or a drive and / or a latch and / or a door opener. The electrical component is supplied with a supply voltage via a supply line during normal operation. The device comprises an energy storage device comprising at least one capacitor, which is connectable to the supply line, preferably already connected, and is charged via the supply line during normal operation. A voltage converter circuit is also included. Crucially, in the event of disturbances or failures of the supply voltage, the voltage converter circuit switches to emergency power and supplies the electrical component with electrical energy by discharging the at least one capacitor.

[0012] The voltage converter circuit allows the voltage level of the energy storage device or the capacitor used as an energy storage device to be adjusted, preferably according to the voltage rating of the capacitor used as an energy storage device. In particular, the voltage can be adapted to the supply line and / or to the required voltage of the component being powered in emergency operation. This makes it possible to optimally utilize the available installation space and the parameters of the capacitor used as the storage element, especially independently of the available supply voltage or the emergency power supply voltage.

[0013] The emergency power supply device can be self-contained or integrated. A self-contained emergency power supply device is preferably understood to be a standalone component that can be connected to the power supply line of the electrical component or looped into the power supply line. An integrated emergency power supply device, in particular, is understood to be one that can be installed in the housing of the electrical component to be supplied with emergency power or mounted directly adjacent to the housing. Specifically, the integrated emergency power supply device can be connected to the housing of the electrical component to be supplied, for example, by screwing or snapping it into place.

[0014] Preferably, the term "door" or "window" refers to a window or building door. This can include an access door, an emergency exit door, a fire door, or a corresponding window.

[0015] An energy storage device is an electrical energy storage device that includes at least one capacitor. A single capacitor can be used as the energy storage element, or multiple capacitors can be used connected in parallel and / or in series to achieve the desired storage capacity or voltage rating.

[0016] Under normal operating conditions, a supply line with a power supply cable refers to a mains-based power supply via a house network and a power supply unit. Preferably, a fault or failure of the supply voltage is understood to mean that the regular supply voltage to the electrical component fails or drops below a certain voltage level at which the supply to the electrical component is no longer reliably maintained. This could be due to a power outage or a defect in the power supply unit, for example. However, fault conditions can also be covered in which the supply voltage is superimposed with interference pulses or corresponding EMC disturbances, such that these would impair the regular operation of the electrical component.

[0017] The invention further comprises a method for supplying a door lock, door drive, or door opener with emergency power, wherein, in normal operation, the door lock, door drive, or door opener is operated with a supply voltage. The method includes: providing an energy storage device with at least one capacitor, wherein, in normal operation, the capacitor is charged from a supply line of the door lock, door drive, or door opener; automatically switching to emergency power in the event of a fault or failure of the supply voltage; and supplying the door lock, door drive, or door opener with emergency power, thereby discharging the at least one capacitor. Crucially, the capacitor is charged with a higher voltage than the supply voltage normally present on the supply line.

[0018] It is provided that the voltage converter circuit increases or transforms the supply voltage to charge the at least one capacitor of the energy storage device with a higher voltage than the supply voltage, and that in emergency power supply the voltage converter circuit reduces the voltage of the at least one capacitor of the energy storage device to supply the electrical component with electrical energy.

[0019] This allows the voltage level of the energy storage device to be higher than the regular supply voltage of the electrical component. This enables the energy to be stored at a higher voltage level than is required to operate the electrical components. Advantageously, with a capacitor, the stored energy is proportional to the square of the voltage. This means that a capacitor can store four times the amount of electrical energy if the voltage is doubled. Therefore, it is possible to store a significantly larger amount of energy in relatively small capacitors than would be possible based solely on the supply voltage. This allows the amount of stored electrical energy to be increased without requiring more components, more expensive components, or more installation space.Furthermore, operational reliability can be increased by increasing the amount of electrical energy available in an emergency.

[0020] In particular, it may be provided that the voltage of the energy storage device or of the at least one capacitor is at least 1.5 times, or at least twice, or at least three times, or at least four times, in particular several times, the supply voltage.

[0021] Another advantage is that relatively inexpensive electrolytic capacitors or tantalum capacitors can be used for storage, thus avoiding the use of the relatively expensive and lifespan-limited supercapacitors or goldcaps.

[0022] In one embodiment, the voltage circuit may include a boost regulator, in particular a step-up converter, for increasing the supply voltage and charging the at least one capacitor.

[0023] Furthermore, the voltage converter circuit may include a buck converter, in particular a step-down converter, to reduce the voltage of the at least one capacitor supplying the electrical component in case of emergency power supply.

[0024] Preferably, highly efficient voltage converters are used as boost converters and / or buck converters, exhibiting an efficiency of > 90%, preferably > 94%, and most preferably > 96%. This makes it possible to store electrical energy with high efficiency and to keep the resulting storage and conversion losses relatively low.

[0025] In one embodiment, the voltage converter circuit can be provided with a switching device comprising a voltage detector for measuring the voltage on the supply line. This switching device automatically switches to emergency power supply when the voltage on the supply line falls below a predefined minimum value, and / or automatically switches to normal operation when a predefined switching threshold is exceeded. Advantageously, this allows for the establishment of an automatic emergency operation. This means that a failure of the electrical component being supplied or an operational malfunction can be prevented by the automatic switching device. It is particularly advantageous that when the electrical supply voltage returns to normal operation, the switching device automatically and seamlessly switches back to normal operation without requiring any maintenance intervention or fuse replacement.

[0026] In a preferred embodiment, the voltage converter circuit may include a priority circuit that, during normal operation, connects the electrical component to be powered to the supply line and, during emergency operation, connects the electrical component to be powered to the at least one capacitor and / or the buck converter, in particular a step-down converter. The priority circuit ensures that, provided a functioning supply voltage is available, the electrical component to be powered is always reliably supplied with electrical energy from this voltage source. In the event of a failure of the regular supply voltage, the priority circuit automatically switches to the emergency power supply to maintain the operation of the electrical component without interference and, in particular, without interruption.Another advantage of the priority circuit is that as soon as the regular supply voltage is restored, there is an automatic switch back from emergency operation to the regular supply voltage.

[0027] In one embodiment, it may be provided that the priority circuit has at least two interconnected diodes, in particular that the cathodes of the at least two diodes are interconnected.

[0028] For example, at least one capacitor of the energy storage device can be designed as an electrolytic capacitor and / or as a tantalum capacitor.

[0029] The emergency power supply device can be designed for installation in new components or for newly manufactured door systems. Advantageously, it can also be designed for retrofitting into existing systems. In particular, the voltage converter circuit can be configured for connection to supply lines with a supply voltage in the range of 6 V to 30 V, and specifically, the energy storage device can supply the electrical component with electrical energy via the supply line in the event of an emergency. This makes it possible to use the emergency power supply device without any problems in most common existing building installations.

[0030] To ensure a high electrical energy storage capacity, the at least one capacitor is designed to have a voltage rating of at least 35 V, 50 V, or 63 V. Accordingly, the energy storage device is charged with a voltage of up to 35 V, 50 V, or 63 V.

[0031] Furthermore, the voltage converter circuit is designed to provide an emergency voltage for the electrical component during emergency operation, which is lower than the regular supply voltage. This lower supply voltage during emergency operation reduces the current draw of the electrical component and thus extends the operating time of the emergency power supply. It is advantageous that the emergency voltage is chosen to be high enough to ensure reliable operation of the electrical component.

[0032] The regular supply voltage can have a nominal value and a tolerance range. For example, a nominal value of 12 V with a tolerance of + / - 10 percent. The emergency voltage level can be selected so that it is lower than the lower tolerance limit of the supply voltage, for example, less than 10.8 V.

[0033] In particular, it can be provided that the emergency voltage level is adjustable. This allows the emergency voltage to be set to provide an emergency voltage that is adaptable to the electrical component being supplied during emergency operation. Specifically, it is provided that, during emergency operation, an emergency current with an emergency voltage lower than the regular supply voltage of the power line is supplied.

[0034] The door lock, door drive, or door opener is designed to automatically switch to emergency mode when supplied with emergency power. This emergency mode allows the electrical component to conserve energy and also enables it to be placed in a predetermined emergency state. Alternatively, it can move the door or window to which the component is attached into a defined state, such as locking, unlocking, or closing. This occurs automatically in an emergency due to the varying supply voltage, eliminating the need for additional control of the electrical components via sensors or similar devices.

[0035] To ensure the control of different electrical components, it may be provided that the level of the emergency voltage is adjustable.

[0036] The concept according to the invention also relates to a system comprising an emergency power supply device according to one of the examples described above, as well as a door lock and / or a door drive and / or a door opener.

[0037] It may be provided that the emergency power supply device is designed as a module or a component unit and can be inserted into a housing of the door lock or door drive or door opener, or can be attached to a side wall of the housing, in particular pluggable, preferably extending through the side wall of the housing.

[0038] In one embodiment, it can be provided that the electrical component, preferably the door lock or the door drive or the door opener, has a control unit which includes a normal operation and an emergency operation and switches to normal operation when supplied with electrical energy at a voltage equal to the supply voltage and switches to emergency operation when supplied with electrical energy at the level of the emergency voltage.

[0039] An advantage of this is that emergency operation has lower power consumption than normal operation. Advantageously, the control unit can be configured in emergency operation to control the activation of a defined position, preferably an unlocked state, a locked state, or the achievement of a closed position.

[0040] The invention can be applied particularly in buildings, especially for the automation of doors and / or windows and / or for access control of doors and / or windows. It can also be used for doors and / or windows in escape routes of buildings. It is also conceivable to those skilled in the art that the emergency power supply device according to the invention could be used on vehicle doors. The emergency power supply device can be used and sold as a module or as a stand-alone device. Alternatively, the emergency power supply device can be sold integrated into an electrical component, such as a door lock, a door opener, or a door drive.

[0041] Further advantageous embodiments of the invention are shown in the figures and described in the following figure description. These show: Fig. 1: an exemplary application of the invention on a building door; Fig. 2: a schematic circuit diagram of the emergency power supply device according to the invention; Fig. 3: a circuit diagram of an application example of the emergency power supply device according to the invention.

[0042] In the Fig. Figures 1 to 3 illustrate exemplary embodiments of the invention. The figures are not intended to be exhaustive, but rather represent advantageous embodiments of the invention. Features with the same technical function are designated with the same reference symbols in the figures. A person skilled in the art can modify the embodiments shown in the figures within the scope of the claims and their technical expertise, or combine features from different embodiments without departing from the scope of the invention.

[0043] The Fig. Figure 1 shows a door 1 on which several electrical components 21, 22, 23 are arranged. The electrical components include a lock 22, a door opener 21, and a door drive 23.

[0044] The door 1 comprises a door leaf 11, which is pivotally mounted on a door frame 12 via hinges 13a and 13b. In the area of ​​its closing edge, the door leaf 11 has a door lock 22 with a door handle 14. The door lock 22 can be operated by means of a key or cylinder (not shown). A door lock control unit 221 is arranged in the door lock 22. The door lock 22 can be controlled via the door lock control unit 221; for example, a motorized movement of a bolt and / or a latch can be initiated.

[0045] A door opener 21 is provided between the door frame 12 and the door leaf 11. The door opener 21 is located on the door frame 12 and has a door opener latch that interacts with a door catch located on the door leaf. The door opener 21 includes a door opener control unit 211. The door opener can be controlled via the door opener control unit. The door opener control unit 211 is optional; that is, it is also conceivable that a door opener 21 can be used without its own door opener control unit 211.

[0046] A door drive 23 is arranged at the upper end of the door leaf 11. The door drive 23 is connected to the door frame 12 and drives the door leaf 11 via a scissor linkage. That is, the door drive can move the door leaf 11 into an open or closed position by motor. The door drive 23 includes a door drive control unit 231.

[0047] The electrical components 21, 22, and 23 are supplied with electrical energy via a supply line 31. In the case of the door lock 22, the supply line 31 is routed via a flexible cable transition 16 to compensate for movement between the door leaf 11 and the door frame 12. An emergency power supply device 3 is arranged between the supply line 31 and each of the electrical components 21, 22, and 23. In the event of a power failure or disturbances in the electrical supply voltage, the emergency power supply device 3 takes over the emergency power supply of the electrical component, i.e., either the door lock 22, the door opener 21, or the door drive 23.

[0048] Supply line 31 is fed by a power supply unit 15. The power supply unit 15 is located remotely from door 1 and serves to transform an existing mains voltage and provide a supply voltage for the electrical components of the door. The supply voltage is, for example, 12 volts DC or 24 volts DC.

[0049] In the Fig. Figure 2 shows a schematic diagram of the emergency power supply device 3. The emergency power supply device 3 comprises a voltage converter circuit 4 and a priority circuit 43. At the input of the emergency power supply device 3, i.e., at the terminals in the Fig. 2 on the left side, the supply line 31 is connected. The output of the emergency power supply device 3, i.e., the contacts or terminals on the right side in the Fig. 2, are with an electrical component, here in Fig. 2 for example the door lock 22, connected.

[0050] The voltage converter circuit 4 includes an energy storage device 32. The energy storage device 32 has a capacitor 321 as the component storing the electrical energy. The capacitor 321 can be configured as a single capacitor or as a combination of several capacitors. The capacitor 321 is designed as an electrolytic capacitor, which is cost-effective, and has a voltage rating of preferably 35 V, 50 V, or 60 V, in any case higher than the regular supply voltage at the supply line 31.

[0051] The energy storage device 32 is connected to the supply line 31 via a boost converter or step-up converter 41. The boost converter increases the supply voltage of the supply line in order to charge the energy storage device 32, or the capacitor(s) 321, with a higher voltage than is normally present on the supply line. This higher voltage allows for a higher storage density of electrical energy in the energy storage device.

[0052] A step-down converter 42 is arranged at the output of the energy storage device. This step-down converter reduces the high voltage of the energy storage device to a lower voltage in order to power the connected electrical component in an emergency, in this example the Fig. 2. To supply the door lock 22 with electrical energy.

[0053] The priority circuit 43 has two diodes connected in such a way that the voltage source with the higher voltage is switched on to the electrical component or the door lock. Under normal operating conditions, the voltage applied to the priority circuit 43 via the supply line 31 is higher, so the supply voltage is passed through to the door lock 22 via the upper diode. If the supply voltage from the supply line fails, the voltage across the upper diode drops, and the lower diode becomes conductive, automatically connecting the output voltage of the step-down converter 42 to the door lock 22. This means that in the event of a failure or fault in the supply voltage on the supply line, the emergency power supply is automatically and seamlessly switched over or activated by the priority circuit 43.As soon as the supply line 31 provides a regular supply voltage again, the priority circuit 43 automatically and without interruption restores the supply to the door lock 22 to the regular supply voltage via the supply line 31. The energy storage device 32 can now be recharged via the step-up converter 41 to ensure that the energy storage device 32 is always as fully charged as possible.

[0054] The current or voltage supplied via the step-down converter 42 is designed to be at a lower voltage level than the supply voltage of the supply line 31. This lower voltage level, referred to as emergency voltage, allows the door lock 22 to automatically switch to emergency or power-saving mode. A simple voltage detector in the control unit 221 of the door lock 22 is sufficient for this purpose, and no external control line is required to switch the door lock 22 to emergency or power-saving mode.

[0055] The Fig. Figure 3 shows an exemplary circuit diagram of an embodiment of the emergency power supply device 3 according to the invention. In the circuit diagram of the Fig.On the left side of terminal 3 is the connection to the supply line 31. On the right side are the connections for supplying an electrical component, for example, a door lock 22. Also on the right side is the priority circuit 43, which includes the two diodes D7 and D3. The energy storage device 32 has two capacitors 321 connected in parallel, which are labeled C7 and C8 in the circuit diagram. On the left side of the circuit diagram is the boost controller 41, which is an integrated switching regulator. On the right side of the circuit diagram, between the energy storage device 32 and the priority circuit 43, is the buck controller 42. The buck controller 42 also has an integrated switching regulator. To achieve high energy storage efficiency, both the boost controller 41 and the buck controller 42 are designed to have high efficiency, i.e.,have an efficiency greater than 90%.

[0056] The step-down regulator 42 can be adjusted with respect to its emergency voltage. Two switches or jumpers, J7 and J8, are provided for this purpose, allowing the level of the emergency voltage to be set. This enables the emergency voltage supplied by the emergency power supply device 3 during emergency operation to be adjusted, thus allowing the emergency power supply device to be adapted to supplying different electrical components.

[0057] The plan is for the emergency power supply device 3 to supply one electrical component with emergency electrical power. However, it would also be conceivable to connect two or three electrical components to the emergency power supply device 3 in order to supply them with electrical energy in an emergency. Reference symbol list 1 door 11 door leaves 12 door frames 13a Door hinge 13b Door hinge 14 Door handle 15 Power supply 16 Cable transition 21 door openers 211 Door opener control unit 22 Door lock 221 Door lock control unit 23 Door drive 231 Door drive control unit 3 Emergency power supply 31 Supply line 32 energy storage devices 321 Capacitor 4 Voltage converter circuit 41 Step-up converters 42 Step-down converters 43 Priority switching

Claims

[1] Emergency power supply device for supplying an electrical component of a door (1) or window, i.e. a lock (22), and / or a drive (23), and / or a latch, and / or a door opener (21), wherein the electrical component (21, 22, 23) is supplied with a supply voltage via a supply line (31) during normal operation, and comprising an energy storage device (32) comprising at least one capacitor (321), wherein the energy storage device (32) is connectable to the supply line (31) and is charged via the supply line (31) during normal operation, as well as with a voltage converter circuit (4), characterized by , that the voltage converter circuit (4) switches to emergency power supply in the event of disturbances or failures of the supply voltage and supplies the electrical component (21, 22, 23) with electrical energy by discharging the at least one capacitor (321); that in normal operation the supply is provided via the supply line (31) through a house network and a power supply unit; that the voltage converter circuit (4) increases the supply voltage in order to charge the at least one capacitor (321) with a higher voltage than the supply voltage; and that in emergency operation or for emergency power supply the voltage converter circuit (4) decreases the voltage of the at least one capacitor (321) in order to supply the electrical component (21, 22, 23) with electrical energy.and that the lock (22) or the drive (23) or the door opener (21) automatically switches to emergency operation and to a predetermined emergency state when supplied with emergency voltage, and that in emergency operation an emergency current with an emergency voltage lower than the regular supply voltage of the supply line is provided, and that the at least one capacitor (321) has a voltage withstand rating of at least 35 V or at least 50 V or at least 63 V. [2] Emergency power supply device according to claim 1, characterized by , that the voltage of the at least one capacitor (321) is at least 1.5 times, or at least twice, or at least three times, or at least four times, or in particular several times, the supply voltage. [3] Emergency power supply device according to any of the preceding claims, characterized by, that the voltage converter circuit (4) includes a boost converter, in particular a step-up converter (41) for increasing the supply voltage and charging the at least one capacitor (321). [4] Emergency power supply device according to any of the preceding claims, characterized by , that the voltage converter circuit (4) includes a step-down converter, in particular a step-down converter (42), to reduce the voltage of the at least one capacitor (321) for supplying the electrical component (21, 22, 23) in emergency operation or for emergency supply. [5] Emergency power supply device according to any of the preceding claims, characterized by, that the voltage converter circuit (4) has a switching device comprising a voltage detector for measuring the voltage on the supply line (31), and that the switching device automatically switches to emergency supply when a predetermined minimum voltage value on the supply line (31) is undershot, and / or automatically switches to normal operation when a predetermined switching threshold is exceeded. [6] Emergency power supply device according to any of the preceding claims, characterized by , that the voltage converter circuit (4) has a priority circuit (43) which in normal operation connects the electrical component to be supplied to the supply line (31) and in emergency operation connects the electrical component to be supplied (21, 22, 23) to the at least one capacitor (321) and / or the buck converter, in particular step-down converter (42). [7] Emergency power supply device according to any of the preceding claims, characterized by , that the priority circuit (43) has at least two interconnected diodes, in particular that the cathodes of the at least two diodes are interconnected. [8] Emergency power supply device according to any of the preceding claims, characterized by , that at least one capacitor (321) is designed as an electrolytic capacitor and / or as a tantalum capacitor. [9] Emergency power supply device according to any of the preceding claims, characterized by , that the voltage converter circuit (4) is designed for connection to a supply line (31) with a supply voltage in the range of 6 V to 30 V, in particular that the energy storage device (32) supplies the electrical component (21, 22, 23) with electrical energy via the supply line (31) in the event of an emergency supply. [10] Emergency power supply device according to any of the preceding claims, characterized by that the emergency voltage is adjustable. [11] System comprising an emergency power supply device according to one of the preceding claims and a door lock (22), and / or a door drive (23), and / or a door opener (21), connected to a supply line (31). [12] System according to claim 11, characterized by that the emergency power supply device (3) is designed as a module or a component unit and can be inserted into a housing of the door lock (22) or the door drive (23) or the door opener (21), or can be attached to a side wall of such a housing, in particular pluggable, preferably extending through a wall of the housing. [13] System according to claim 11 or 12, characterized by, that the electrical component (21, 22, 23), preferably the door lock (22) or the door drive (23) or the door opener (21), has a control unit which includes a normal operation and an emergency operation and switches to normal operation when supplied with electrical energy at a voltage equal to the supply voltage and switches to emergency operation when supplied with electrical energy at the level of the emergency voltage. [14] System according to claim 13, characterized by that emergency operation has a lower power consumption than normal operation. [15] System according to claim 13 or 14, characterized by , that in emergency operation the control unit controls the electrical component (21, 22, 23) to control a defined position, preferably an unlocked state, or a locked state, or to control the achievement of a closed position. [16] Method for supplying a door lock (22) or a door drive (23) or a door opener (21) with emergency power, wherein in normal operation the door lock (22) or the door drive (23) or the door opener (21) is operated with a supply voltage, providing an energy storage device (32) with at least one capacitor (321), wherein the capacitor (321) is charged in normal operation from a supply line of the door lock (22) or the door drive (23) or the door opener (21), automatically switching to emergency power in the event of faults or failure of the supply voltage and supplying the door lock (22) or the door drive (23) or the door opener (21) with emergency power while discharging the at least one capacitor (321), characterized by, that the capacitor (321) is charged with a higher voltage than the supply voltage normally present on the supply line (31), wherein the capacitor (321) is charged with a voltage of up to 35 V or 50 V or 63 V, and that the voltage converter circuit (4) increases the supply voltage in order to charge the at least one capacitor (321) with a higher voltage than the supply voltage, and that in emergency operation or for emergency power supply, the voltage converter circuit (4) reduces the voltage of the at least one capacitor (321) in order to supply the electrical component (21, 22, 23) with electrical energy,and that the door lock (22) or the door drive (23) or the door opener (21) automatically switches or is switched to emergency operation and to a predetermined emergency state when supplied with emergency voltage, and that in normal operation the supply is provided via the supply line (31) through a house network and a power supply unit, and that in emergency operation an emergency current with an emergency voltage lower than the regular supply voltage of the supply line is provided. [17] Method according to claim 16, characterized by that the level of emergency voltage is adjustable.

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