WO2024023232A1 - Procédé de commande d'une alimentation en énergie d'un ascenseur - Google Patents

Procédé de commande d'une alimentation en énergie d'un ascenseur Download PDF

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Publication number
WO2024023232A1
WO2024023232A1 PCT/EP2023/070870 EP2023070870W WO2024023232A1 WO 2024023232 A1 WO2024023232 A1 WO 2024023232A1 EP 2023070870 W EP2023070870 W EP 2023070870W WO 2024023232 A1 WO2024023232 A1 WO 2024023232A1
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WO
WIPO (PCT)
Prior art keywords
battery
elevator
charging
power
power module
Prior art date
Application number
PCT/EP2023/070870
Other languages
German (de)
English (en)
Inventor
Valerio Villa
Juri ANZINI
Dominik SCHMITT
Original Assignee
Inventio Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Inventio Ag filed Critical Inventio Ag
Publication of WO2024023232A1 publication Critical patent/WO2024023232A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00—Control systems of elevators in general
    • B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system

Definitions

  • the present invention relates to a method for controlling a power supply to an elevator.
  • the invention further relates to an elevator and a power supply system for an elevator as well as a control unit, a computer program and a computer-readable medium for carrying out the method.
  • An elevator for transporting people and/or objects between different floors of a building can be switched to an energy-saving mode (stand-by) during periods of prolonged inactivity, in which the elevator consumes significantly less electrical energy than in a normal operating mode.
  • certain electrical components of the elevator can be temporarily deactivated, for example disconnected from the power supply.
  • the remaining, non-deactivated components of the elevator, such as control electronics, can then continue to be supplied with electrical energy via the power grid, for example.
  • a first aspect of the invention relates to a computer-implemented method for controlling a power supply to an elevator.
  • the elevator includes a power module configured to supply the elevator with electrical energy from a power grid and/or a battery and to charge the battery.
  • the power module can, for example, include a corresponding charger.
  • the procedure includes, if it is detected that the elevator is in an inactive state, in which less electrical energy is taken from the battery than in an active state of the elevator: adjusting at least one charging parameter for charging the battery to the inactive state, more precisely to the reduced state Energy extraction from the battery; Generating a control command for controlling the power module so that the battery is charged at least in phases according to the at least one charging parameter adapted to the inactive state.
  • the inactive state can be recognized, for example, when the elevator has not been used for a certain period of time.
  • the elevator can be operated in the inactive state in such a way that it consumes significantly less electrical energy compared to the active state, for example a normal operating mode.
  • the battery can be a rechargeable battery, for example a lithium ion or lithium iron phosphate battery.
  • the battery may comprise a plurality of galvanic cells, which may be connected in series and/or parallel with one another.
  • the battery can, for example, have an output voltage of at most 120 V, in particular at most 60 V, preferably 48 V. However, higher DC voltages than the output voltage are also possible.
  • the battery can, for example, have an output voltage of at least 12 V, in particular at least 24 V.
  • the capacity of the battery can be, for example, between 1 Ah and 10 Ah, in particular between 7 Ah and 8 Ah. In other words, the battery can have a capacity of more than 0.1 kWh, more than 0.2 kWh, more than 0.5 kWh or even more than 1 kWh. However, higher capacities are also possible.
  • the power network can be an alternating voltage and/or
  • the alternating voltage or alternating current can be or be multi-phase, especially three-phase.
  • the power network can, for example, be a low-voltage power network with a mains voltage between 200 V and 1000 V, in particular 230 V.
  • the power module can be configured to convert a mains voltage provided by the power grid, a battery voltage provided by the battery or a combination of both voltages into a supply voltage for one or more electrical consumers of the elevator.
  • the supply voltage can in particular be a direct voltage, particularly in the low-voltage range up to 120 volts (see below).
  • the power module can provide either the same supply voltage or different supply voltages for different consumers.
  • the power module can be equipped with an inverter, rectifier, converter, DC-DC converter, brake chopper or a combination of at least two of these examples.
  • the power module can be configured to charge the battery in a controlled manner and - optionally - to discharge it in a controlled manner.
  • the power module can include hardware and/or software modules for controlling the energy supply to the elevator.
  • different control modes for controlling the energy supply can be implemented by different hardware and/or software modules of the power module.
  • the charging parameter can be, for example, a charging power, a charging voltage, a charging current, a charging duration or a parameter dependent on at least one of these examples.
  • the expression “at least one charging parameter” can also be understood to mean a combination of several charging parameters in the form of a charging profile.
  • the method can be carried out automatically by a processor.
  • a second aspect of the invention relates to a control unit with a processor configured to carry out the method described above and below.
  • the control unit is preferably an elevator control unit with an interface for receiving elevator call data and preferably for sending switching commands for switching an electrical component of an elevator.
  • the control unit can include hardware and/or software modules.
  • the control unit can have a memory and wireless data communication interfaces and/or wired data communication with peripheral devices.
  • the control unit or elevator control unit can be electrically connected or connected to elevator components via the interface.
  • Elevator components that send elevator call data to the control unit or elevator control unit via the interface are, for example, floor panels or cabin panels (in English landing operating panels (LOP), car operating panels (COP)), destination call controls or mobile phones (for example via GSM or Bluetooth with the control unit or elevator control). connected) with the corresponding app.
  • Elevator components for switching are, for example, car and/or shaft lighting, an electric car drive for moving at least one car of the elevator, an electric door drive for moving at least one car and/or shaft door of the elevator, a sensor, for example a light barrier or a load or Distance measuring device.
  • a third aspect of the invention relates to a power supply system for an elevator.
  • the power supply system includes: a grid connection for connecting the power supply system to a power grid; a battery connection for connecting the power supply system to a battery; a power module configured to supply the elevator with electrical energy from the power grid and/or the battery and to charge the battery; the control unit described above and below.
  • a fourth aspect of the invention relates to an elevator.
  • the elevator includes: a car movable in a shaft between multiple floors of a building; an electric drive for driving the cabin; a battery; the energy supply system described above and below.
  • the elevator further comprises at least one electrical component from the list comprising car and/or shaft lighting, an electric car drive for moving at least one car of the elevator, an electric door drive for moving at least one car and/or shaft door of the elevator, a sensor , for example a light barrier or a load or distance measuring device.
  • the elevator is direct, i.e. H. without additional rectification and/or without additional DC voltage conversion, is supplied with a battery voltage that is present at the battery terminals.
  • the electric drive may include one, two or more than two electric motors for driving the cabin.
  • each electric motor can be coupled with its own counterweight.
  • Further aspects of the invention relate to a computer program and a computer-readable medium on which the computer program is stored.
  • the computer program includes commands that cause a control unit, as described above and below, to carry out the method steps of the method described above and below.
  • the computer-readable medium may be a volatile or non-volatile data storage device.
  • the computer-readable medium may be a hard drive, a USB storage device, a RAM, a ROM, an EPROM, a flash memory, or a combination of at least two of these examples.
  • the computer-readable medium can also be a data communication network that enables a download of program code, such as the Internet, or a cloud.
  • Embodiments of the invention may be considered based on the ideas and findings described below, without limiting the invention.
  • the at least one charging parameter can be adjusted using a first characteristic curve that describes a relationship between the at least one charging parameter and an efficiency when charging the battery.
  • the at least one charging parameter can be optimized taking into account a desired efficiency that is to be achieved when charging the battery.
  • Efficiency can mean an efficiency of a charger for charging the battery, an efficiency of the battery that is currently being charged, or an overall efficiency when charging the battery.
  • the at least one charging parameter can be adjusted using a second characteristic curve that describes a relationship between the at least one charging parameter and a service life of the battery.
  • the at least one charging parameter can be optimized taking into account a desired service life that the battery should achieve.
  • the first and/or second characteristic curve can be stored in a memory of the control unit, for example in the form of a look-up table and/or a mathematical function be. It is also possible to optimize the minimum charging parameter outside the control unit, ie offline. In this case, for example, differently optimized charging parameters or charging profs for charging the battery in different states of the elevator, including the active and the inactive state, can be stored in the memory.
  • the efficiency and the service life can be weighted differently when adjusting the at least one charging parameter.
  • the service life can be weighted more heavily than the efficiency.
  • the charging parameter can be optimized so that the battery is charged as gently as possible when inactive.
  • both criteria can be weighted equally.
  • the at least one charging parameter can be a charging power.
  • the battery can have a significantly lower, e.g. B. more than 10%, more than 30%, more than 50%, more than 70% or more than 90% lower (average) charging power than in the active state.
  • control command can be generated to control the power module so that the battery is alternately charged and discharged in several charging and discharging phases.
  • the elevator can be disconnected from the power grid during each discharging phase and supplied with electrical energy via the battery. Repeated charging and discharging can prevent the battery from being over-discharged when the elevator is inactive for a long time. This can have a positive effect on the lifespan of the battery.
  • the battery can be charged with electrical energy from the power grid in each charging phase.
  • the energy required to charge the battery can theoretically also be provided by an elevator drive motor operating as a generator.
  • the parameters defining the charging and discharging phases should be coordinated in such a way that a good compromise between energy efficiency and protection of the battery is achieved.
  • This makes it possible to avoid conversion losses, which can occur in designs in which the supply voltage in the inactive state is provided exclusively via the power network (usually an AC network).
  • Such losses are generally greater than those that occur when the supply voltage is provided via a battery, especially if the supply voltage is a (comparatively low) direct voltage.
  • an elevator when it is operated in a particularly energy-saving stand-by mode, only has a low power consumption of, for example, less than 100 W or less than 50 W and the provision of such low power via the power grid is often necessary significant losses, especially conversion losses.
  • the battery can be charged in advance and/or in between in short charging phases with high power, so that relatively low conversion losses occur.
  • the electrical energy stored in the battery during such efficient charging can then be used with high efficiency during discharging in order to supply the elevator with low power in standby.
  • the energy efficiency of the elevator can be improved.
  • the battery can be supplied with 10 to 100 times, in particular 10 to 50 times, more power in each charging phase than is drawn from the battery in each discharging phase. This enables an improvement in efficiency compared to versions with lower energy consumption in the charging phases.
  • the state of charge of the battery at the end of each charging phase can be between 65% and 100%, in particular between 70% and 90%. This has a positive effect on the lifespan of the battery.
  • the state of charge of the battery at the end of each discharging phase can be between 30% and 50%, in particular between 35% and 45%. This also has a positive effect on the lifespan of the battery. Furthermore, at the end of each discharging phase, the battery still has enough capacity to enable emergency operation of the elevator, especially if the elevator's supply via the power grid is disrupted. According to one embodiment, each discharging phase can last at least 20 times, in particular at least 50 times, longer than each charging phase. Such values have proven to be particularly favorable in tests.
  • each charging phase can last less than 15 minutes, in particular less than 10 minutes. In tests, charging phases of 6 minutes each proved to be particularly practical.
  • each discharging phase can last, for example, more than 1 hour, in particular more than 2 hours. In tests, discharging phases of 3 hours each proved to be particularly practical.
  • power between 30 W and 60 W can be supplied to the elevator in each discharging phase.
  • a power of between 30 W and 60 W can be drawn from the battery in each discharging phase.
  • This power can, for example, correspond to the power that the elevator is allowed to consume at most in each discharging phase when inactive in order to meet certain energy efficiency standards. In particular, this power should not be higher than 50 W.
  • the battery can be supplied with a power of between 700 W and 1000 W in each charging phase.
  • a power of between 700 W and 1000 W in each charging phase can be drawn from the power grid in each charging phase.
  • each charging phase an energy of at least 70 Wh, in particular at least 90 Wh, e.g. B. 95 Wh can be implemented.
  • control command can also be generated in order to disconnect the battery and/or the power module from the power grid at least in phases.
  • the battery and/or the power module can be disconnected from the power grid in each discharging phase.
  • the method may further comprise, if it is detected that the elevator is in the inactive state: switching at least one electrical component of the elevator from a current state to an energy-saving state in which the at least one electrical component uses less electrical energy than in current state consumed.
  • the electrical component can be switched off at least temporarily, for example by being separated from an output of the power module.
  • the electrical component can remain switched on at least temporarily in the energy-saving state, with the power module supplying the electrical component with a lower input power than in the current state.
  • the at least one electrical component can, for example, be at least one of the following components: a car and/or shaft lighting, an electric car drive for moving at least one car of the elevator, an electric door drive for moving at least one car and/or shaft door of the elevator, a Sensor, for example a light barrier or a load or distance measuring device.
  • the method can further comprise, if it is detected that the elevator is in the active state again: adjusting the at least one charging parameter to the active state; Generating a further control command for controlling the power module, so that the battery is charged at least in phases according to the at least one charging parameter adapted to the active state.
  • the battery can be charged with a different charging mode when the elevator is active than when the elevator is inactive.
  • the at least one charging parameter adapted to the active state can have been optimized in contrast to the inactive state with a view to achieving the highest possible efficiency (see also above).
  • the active state can be recognized, for example, when a new destination call is registered and/or a car and/or shaft door of the elevator is to be opened.
  • the active state can, for example, correspond to a normal operating mode, i.e. H. correspond to (trouble-free) operation of the elevator. Load peaks can be better absorbed through the combined use of the power grid and battery.
  • the battery can also be used to provide emergency power to the elevator in the event of disruptions, such as a disruption in the (normal) power supply from the mains.
  • the power module may be configured to provide an output voltage of the battery as a supply voltage for supplying the elevator with electrical energy.
  • the supply voltage can for example, a direct voltage of at least 12 V and at most 120 V, in particular at most 60 V, preferably 48 V (see also above). Such supply voltages in the low-voltage range enable particularly energy-saving operation of the elevator.
  • the output voltage of the battery can be used as the supply voltage without additional conversion. This improves the efficiency of the elevator compared to designs in which the supply voltage is only provided by converting the battery voltage, for example by changing its voltage level, since this results in additional losses.
  • Fig. 1 shows an elevator according to an embodiment of the invention.
  • Fig. 2 shows a sequence of charging and discharging phases for charging or discharging a battery of the elevator in a method according to an embodiment of the invention.
  • Fig. 3 shows a first characteristic curve for use in a method according to an embodiment of the invention.
  • Fig. 4 shows a second characteristic curve for use in a method according to an embodiment of the invention.
  • Fig. 1 shows an elevator 1 for transporting people and/or objects between several floors 3 of a building 5.
  • the elevator 1 comprises a cabin 7, which is movably arranged in a vertical shaft 9 of the building 5, and an electric drive 13 , which is designed to raise and lower the cabin 7.
  • the elevator 1 is supplied with electrical energy by one
  • Energy supply system 14 ensures that a power module 15, a
  • Battery connection 16, a power connection 17 and a control unit 18 includes.
  • the Power module 15 is connected on the input side via the mains connection 17 to a power network 19, for example a three-phase network, and via the battery connection 16 to a rechargeable battery 20 and on the output side to the electric drive 13 and other electrical consumers of the elevator 1 (not shown), for example to a Cabin or shaft lighting, an electric door drive for opening or closing cabin and/or shaft doors, light barriers in the door area of the cabin 7 and/or the floors 3 or a load measuring device for measuring a load on the cabin 7.
  • the power module 15 can be configured to supply certain electrical consumers of the elevator 1 with electrical energy from the power grid 19 or the battery 20 or from both energy sources at the same time.
  • the power module 15 can be configured to charge the battery 20 with electrical energy from the power grid 19. It is also possible to charge the battery 20 through recuperation, provided that the electric drive 13 is used to brake the cabin 7, i.e. as a generator.
  • the control unit 18 controls the power module 15.
  • the control unit 18 can be configured to control the power module 15 so that the electric drive 13 accelerates or brakes the cabin 7.
  • the control unit 18 can switch the elevator 1 from a current operating mode to an energy saving mode if it detects that the elevator 1 has not been used for a certain time. This can be the case, for example, when all outstanding destination calls have been processed and all doors of the cabin 7 and/or the shaft 9 are closed.
  • the entire elevator 1 can be deactivated with the exception of its control electronics (which can include the control unit 18 and the power module 15). The energy consumption of the elevator 1 can thus be drastically reduced.
  • the deactivated and/or non-deactivated consumers can then be powered via the battery 20.
  • the control unit 18 includes a memory 23 in which a computer program is stored and a processor 25 configured to execute the Computer program to carry out the method described below for controlling the energy supply of the elevator 1.
  • control unit 18 when the control unit 18 detects that the elevator 1 is to be operated in energy saving mode, it generates a control command 26 which causes the power module 15 to alternately charge and charge the battery 20 in a specific sequence of charging phases 27 and discharging phases 29 to be discharged (see also Fig. 2).
  • the battery 20 can be connected to the power grid 19 in the charging phases 27, whereby the remaining consumers of the elevator 1 can be separated from the power grid 19 and can be supplied with power via the battery 20.
  • the elevator 1 is supplied with power exclusively via the battery 20.
  • the power module 15 can be configured to supply the elevator 1 with the same supply voltage in the different charging phases 27 and discharging phases 29.
  • This can be a DC voltage in the low voltage range up to 120 V, for example 48 V.
  • an alternating voltage is also possible as a supply voltage.
  • the supply voltage can be equal to or essentially equal to a battery voltage present at the connection terminals of the battery 20. An additional voltage conversion can therefore be omitted, which further improves the energy efficiency of the elevator 1.
  • the charging phases 27 and the discharging phases 29 can be constant, for example characterized by a constant length and/or constant charging or discharging power (the ordinate of the diagram shown in Fig. 2 indicates that of the battery 20 absorbed or emitted power or energy). However, it is also possible for the charging and/or discharging phases to vary in their properties over time.
  • control unit 18 can also be configured to generate a deactivation command 30, which causes one or more of the above-mentioned electrical consumers of the elevator 1 to remain disconnected from the power network 19 and, in addition, from the battery 20 as long as the elevator 1 is operated in energy saving mode. It is possible for the control unit 18 to switch the elevator 1 back to normal operating mode as soon as a new destination call is received or a door of the car 7 and/or the shaft 9 is opened. For this purpose, the control unit 18 generates a further control command 31, which causes the power module 15 to supply the elevator 1 with electrical energy primarily via the power grid 19, optionally supported by the battery 20 in order to absorb load peaks.
  • the sequence of charging phases 27 and discharging phases 29 extends over a period of around 24 hours.
  • the elevator 1 absorbs a required power of 40 W in a discharging phase 29 of 3 hours
  • the battery 20 is taken from the battery 20 with energy of 120 Wh.
  • the battery 20 has a state of charge (SOC) of 30%.
  • SOC state of charge
  • the total power is 950 W, which corresponds to an energy consumption of 95 Wh.
  • the battery 20 may be charged and discharged according to the following sequence. “R” stands for a six-minute charging phase 27 and “D” for a one-hour discharging phase 29:
  • the battery 20 can be charged with one or more charging parameters specially adapted to the energy saving mode, here a charging power P.
  • the charging power P can be, for example, using a first characteristic curve 33 (see FIG. 3), which indicates a relationship between P and an efficiency q when charging, and a second characteristic curve 35 (see FIG. 4), which indicates a relationship between P and a service life L of the battery 20, can be optimized.
  • the efficiency p increases as the charging power P increases, whereas the service life L becomes shorter as the charging power P increases (the two characteristic curves 33, 35 are, so to speak, in opposite directions).
  • the further control command 31 can be generated in this case in order to further keep the battery 20 in the active state, i.e. H. in normal operating mode, with a set of charging parameters specifically adapted to this condition.

Abstract

L'invention concerne un procédé de commande d'une alimentation en énergie d'un ascenseur (1) comprenant un module de puissance (15) pour alimenter l'ascenseur (1) en énergie électrique à partir d'un système de réseau (19) et/ou d'une batterie (20) et pour charger la batterie (2). Lorsqu'il est établi que l'ascenseur se trouve dans un état inactif, dans lequel moins d'énergie électrique est prélevée de la batterie (20) que dans un état actif de l'ascenseur (1), le procédé consiste à : adapter au moins un paramètre de charge (P) pour charger la batterie (20) dans l'état inactif ; générer une instruction de commande (26) pour commander le module de puissance (15) de sorte que la batterie (20) est chargée au moins dans certaines phases en fonction dudit paramètre de charge (P) adapté à l'état inactif.
PCT/EP2023/070870 2022-07-29 2023-07-27 Procédé de commande d'une alimentation en énergie d'un ascenseur WO2024023232A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP22187890 2022-07-29
EP22187890.3 2022-07-29

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WO2024023232A1 true WO2024023232A1 (fr) 2024-02-01

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PCT/EP2023/070870 WO2024023232A1 (fr) 2022-07-29 2023-07-27 Procédé de commande d'une alimentation en énergie d'un ascenseur

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009067520A (ja) * 2007-09-12 2009-04-02 Mitsubishi Electric Corp エレベータの制御装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009067520A (ja) * 2007-09-12 2009-04-02 Mitsubishi Electric Corp エレベータの制御装置

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