EP4285461A1 - Installation de transfert inductif d'énergie électrique et procédé de fonctionnement d'une installation - Google Patents

Installation de transfert inductif d'énergie électrique et procédé de fonctionnement d'une installation

Info

Publication number
EP4285461A1
EP4285461A1 EP21835219.3A EP21835219A EP4285461A1 EP 4285461 A1 EP4285461 A1 EP 4285461A1 EP 21835219 A EP21835219 A EP 21835219A EP 4285461 A1 EP4285461 A1 EP 4285461A1
Authority
EP
European Patent Office
Prior art keywords
secondary winding
handset
control
sensors
value
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
EP21835219.3A
Other languages
German (de)
English (en)
Inventor
Thomas Uhl
Valentin Kuhfuss
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SEW Eurodrive GmbH and Co KG
Original Assignee
SEW Eurodrive GmbH and Co KG
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 SEW Eurodrive GmbH and Co KG filed Critical SEW Eurodrive GmbH and Co KG
Publication of EP4285461A1 publication Critical patent/EP4285461A1/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H02M1/327—Means for protecting converters other than automatic disconnection against abnormal temperatures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/01—Resonant DC/DC converters
    • H02M3/015—Resonant DC/DC converters with means for adaptation of resonance frequency, e.g. by modification of capacitance or inductance of resonance circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/50—Charging of capacitors, supercapacitors, ultra-capacitors or double layer capacitors

Definitions

  • the invention relates to a system for the inductive transmission of electrical power and a method for operating a system.
  • a vehicle-mounted charging module is known from DE 10 2013 215 785 A1.
  • a system for inductive charging is known from WO 2020/002 240 A1.
  • the object of the invention is therefore to improve the operational reliability of systems.
  • the object is achieved in the system for inductive transmission of electrical power according to the features specified in claim 1 and in the method for operating a system according to the features specified in claim 15.
  • Important features of the invention in the system for the inductive transmission of electrical power from a primary conductor system of the system to a secondary winding of a mobile part of the system that can be moved relative to the primary conductor system are that the secondary winding is connected to capacitances to form an oscillating circuit, wherein the handset has a controllable switch, by means of which the oscillating circuit can be detuned and/or by means of which at least a partial area of the oscillating circuit can be short-circuited.
  • the advantage here is that the inductive transmission can be terminated after a risk has been detected, in particular after a threshold value has been exceeded, in particular at a voltage, a current or a temperature.
  • the capacitances are connected in series with the secondary winding, thus in particular forming a series circuit, with an AC/DC converter being supplied from the series circuit, in particular with the series circuit being arranged on the AC voltage-side connection of the AC/DC converter and/or or applied, a load being able to be fed from the DC voltage-side connection of the AC/DC converter, in particular a load being connected in parallel with it.
  • the advantage here is that a high level of efficiency can be achieved even with weak inductive coupling between the primary conductor system and the secondary winding.
  • the partial area has a series connection made up of the secondary winding and a first capacitance, the resonant circuit being a series connection made up of a second capacitance and the partial area.
  • the switch is less stressed when switching, in particular short-circuiting or opening, since a lower current strength or voltage strength occurs in the partial area.
  • the partial area can be fixed or fixed by a connecting element. The advantage here is that, depending on the respective system, a different partial area can be short-circuited.
  • the connecting element is a bridge that can be fitted in a variety of ways, a changeover switch or a bridge fitted on a printed circuit board.
  • the advantage here is that a simple, cost-effective implementation of a flexibly selectable connection can be achieved.
  • controllable switch is fed a control signal from a control of the handset, the control being connected to one or more sensors, in particular the control signal being generated by the control as a function of the values of physical variables of the handset detected by the sensor or sensors becomes.
  • the or one of the sensors detects the value of the temperature of the secondary winding and/or is suitably arranged on the handset, in particular designed as an infrared temperature sensor for non-contact detection of the temperature of the secondary winding.
  • the advantage here is that the transmission of electrical power can be switched off in the event of excess temperature, and the operational reliability can therefore be increased. In particular, the risk of fire can be reduced.
  • the or one of the sensors detects the value of the temperature of the AC/DC converter, in particular the rectifier or controllable rectifier, secondary winding and/or is suitably arranged on the handset, in particular is designed as an infrared temperature sensor for non-contact detection of the temperature of the AC/DC converter.
  • the advantage here is that the transmission of electrical power can be switched off in the event of excess temperature, and the operational reliability can therefore be increased. In particular, the risk of fire can be reduced.
  • the or one of the sensors detects the value of the voltage present at the DC or AC connection of the AC/DC converter, in particular the rectifier or controllable rectifier, and/or is suitably arranged on the handset.
  • the advantage here is that in the event of an overvoltage, the transmission of electrical power can be switched off and the operational reliability can thus be increased. In particular, the voltage breakdown and thus the risk of fire can be reduced.
  • the or one of the sensors detects the value of the current flowing through the secondary winding and/or is suitably arranged on the mobile part.
  • the advantage here is that in the event of an overcurrent, it is possible to switch off the transmission of electrical power and the operational reliability can therefore be increased. In particular, the risk of fire can be reduced.
  • the or one of the sensors detects the value of the current entering or exiting the DC-side connection of the AC/DC converter and/or is suitably arranged on the mobile part.
  • the advantage here is that in the event of an overcurrent, it is possible to switch off the transmission of electrical power and the operational reliability can therefore be increased. In particular, the risk of fire can be reduced.
  • control has a comparison means which compares the values of the respective physical variable or variables of the mobile part detected by the sensor or sensors with a respective threshold value, the control generating the control signal for the controllable switch depending on the output signal of the comparison means and/or or depending on the result of the comparison.
  • control monitors the values of the respective physical variable or variables of the handset detected by the sensor or sensors for exceeding an impermissible degree of deviation from a setpoint value, the control generating the control signal for the controllable switch depending on the output signal of the monitoring and/or or generated depending on the result of the monitoring.
  • control is suitably designed in such a way that monitoring for an impermissibly high degree of deviation from a functional relationship, in particular from a proportionality, of the values detected by two of the sensors is carried out, in particular by the control and the control generates the control signal for the controllable switch depending on the result of the monitoring.
  • Important features of the method for operating a system are that electrical power is transmitted from a primary conductor system of the system to a secondary winding of a mobile part of the system that can be moved relative to the primary conductor system, with capacitances being connected to the secondary winding to form an oscillating circuit from which a rectifier is fed , the output voltage of which is made available to a consumer, with values of physical variables of the handset being recorded and monitored for an impermissibly high degree of deviation from a functional relationship, in particular from proportionality, with the resonant circuit being detuned or at least a partial area depending on the result of the monitoring of the resonant circuit is short-circuited.
  • the advantage here is that an abnormal operating state can be recognized immediately and damage can be avoided by switching off the power transmission; in particular, the risk of fire is reduced and operational safety is thus increased.
  • a first of the physical variables of the handset is the temperature of the resonant circuit and a second of the physical variables of the handset is the temperature of the rectifier, with the quotient of the detected values of the both physical variables is formed and is monitored for an impermissibly high degree of deviation from a setpoint.
  • FIG. 1 shows the secondary part of a system for the inductive transmission of electrical power.
  • FIG. 2 An exemplary embodiment of the system is shown in FIG. 2, a triac being used as the controllable switch 2 .
  • the system has a primary conductor system, which preferably has an elongated line conductor laid in the system.
  • a mobile part arranged to be movable along the primary conductor system has a secondary winding 1 which is provided inductively coupled to the primary conductor system.
  • An alternating current is applied to the primary conductor system, with the frequency of the alternating current preferably being a medium frequency.
  • the frequency of the alternating current preferably being a medium frequency.
  • a frequency between 10 kHz and 1 MHz is used as the frequency of the alternating current.
  • capacitors (6, 7), in particular a first capacitor 6 and a second capacitor 7, are connected in series to the secondary winding 1 in resonant operation, with these being dimensioned in such a way that the capacitors (6, 7 ) and the resonant circuit formed by the secondary winding 1 has a resonant frequency which is equal to the frequency of the alternating current impressed on the primary conductor system.
  • capacitors (6, 7 ) and the resonant circuit formed by the secondary winding 1 has a resonant frequency which is equal to the frequency of the alternating current impressed on the primary conductor system.
  • a rectifier 4 which is preferably designed to be controlled, is fed from the resonant circuit, the output voltage of which feeds a load 8 and a smoothing capacitor 9 arranged in parallel therewith.
  • the output voltage is detected by a sensor and monitored for exceeding a first threshold value by an electronic controller connected to the sensor, which also acts as a driver 5 for a controllable switch 2, in particular a controllable semiconductor switch.
  • controllable switch 2 detunes the oscillating circuit by bridging part of the oscillating circuit.
  • Which part is bridged can be determined by a connecting element 3, in particular by a bridge that can be fitted variably, by a changeover switch or by a bridge that can be fitted on a printed circuit board.
  • a connecting element 3 the secondary winding itself is short-circuited.
  • a part of the oscillating circuit containing the secondary winding 1 and a first capacitance 6 is short-circuited, a second capacitance 7 of the oscillating circuit not belonging to this short-circuited part.
  • the entire resonant circuit is short-circuited, i.e. the input of rectifier 4.
  • the resonant circuit is detuned or short-circuited in such a way that practically no voltage is available at the input of the rectifier 4, even if a voltage is induced at the secondary winding 1.
  • the oscillating circuit When the switch 2 is open, the oscillating circuit remains untuned, so that the full voltage generated by the oscillating circuit is present at the input of the rectifier 4 .
  • the switch 2 When the first threshold value is exceeded, the switch 2 is closed and the connecting element 3 is thus effective in such a way that no voltage is made available at the input of the rectifier 4 .
  • the switch 2 When the value falls below the first threshold value, the switch 2 is opened and the full voltage that can be generated by the resonant circuit is thus made available at the input of the rectifier 4 .
  • a sensor for detecting the temperature of the rectifier 4 and/or the oscillating circuit 1 can also be provided.
  • the switch 2 can be closed even if a respective further threshold value is exceeded, and a protective effect can thus be achieved for the arrangement. Because if the temperature is too high, there is a risk of fire.
  • a sensor for detecting a current in particular the current of the secondary winding 1 or the output current at the rectifier 4, can be provided if a third threshold value is exceeded.
  • the switch 2 is thus closed when a current threshold value is exceeded.
  • the switch 2 is already closed when a single one of all the threshold values is exceeded. The switch 2 is therefore only opened if none of the threshold values is exceeded.
  • At least one energy store of the handset can also be provided as a consumer 8, from which the drive of the handset is supplied.
  • the energy store is preferably a capacitor, in particular an ultracap.
  • a hysteresis is provided around the respective threshold value.
  • a sensor for detecting the temperature of the secondary winding and a sensor for detecting the temperature of the rectifier 4 are provided. It is monitored whether the two recorded temperatures change in a predicted way or not.
  • the switch 2 if there is an impermissibly large deviation from the proportionality of the two temperatures, the switch 2 is activated in such a way that the switch closes. Otherwise the switch 2 remains open, in particular if the value of a respective physical quantity detected by one or more other sensors does not exceed a respective threshold value.
  • the quotient of the two detected temperatures can be formed in a simple manner, with the quotient then being monitored for an impermissibly large degree of absolute deviation from a target value. Mathematically equivalent is the monitoring of falling below and exceeding corresponding threshold values.
  • a functional relationship in particular the deviation from the proportionality, of the values detected by two of the sensors is also monitored and depending on the result of the monitoring, i.e. in particular when an impermissibly high degree of absolute deviation from a setpoint is exceeded, switch 2 is closed.
  • controllable switch can be implemented as a triac, which can be controlled electrically isolated from the control 5 via an optocoupler.
  • the TRIAC is triggered by a control current in the control terminal and conducts equally in both directions. If the control signal were lost, the TRIAC would go out at the next current zero crossing if it were operated at a low frequency, in particular with a mains frequency of 50 Hz or 60 Hz.
  • the triac since it is operated according to the invention with a medium-frequency alternating current, in particular with an alternating current whose frequency is between 10 kHz and 1 MHz, in particular between 20 kHz and 100 kHz, the triac conducts after ignition until the effective value of the alternating current becomes zero. This is because the frequency of the alternating current is so high that the component cannot switch to the blocking state when the current passes through zero. The conductive state of the component thus only stops when the secondary winding 1 is no longer magnetically flooded by the primary conductor system of the system.
  • the controllable switch 2 designed as a triac is arranged as an SMD component on a printed circuit board.
  • This printed circuit board has a metal carrier 30, in particular made of aluminum or copper, with an insulation layer 31 being arranged on the metal carrier 30 for electrical insulation.
  • conductor track sections (32, 33) are arranged, which are used for electrical contacting and for holding the triac.
  • a connecting plate 34 of the triac 35 is soldered to one of the conductor track sections (32, 33) and a metallic outer surface of the triac 35 rests against another conductor track section (32, 33) and is soldered to it.
  • the insulation layer is electrically insulating, but has a very good thermal conductivity. The heat loss of the triac is thus efficiently spread out via the conductor track sections (32, 33) and the insulating layer 31 and the metal carrier 30.
  • the triac can thus also be exposed to currents of more than 10 amperes, in particular more than 30 or even 100 amperes.
  • controllable switches in particular controllable semiconductor switches
  • connecting element in particular bridge that can be fitted in a variety of ways, changeover switch or bridge that can be fitted on a printed circuit board
  • metal carrier in particular made of aluminum or copper

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Protection Of Static Devices (AREA)
  • Rectifiers (AREA)

Abstract

Installation permettant le transfert inductif d'énergie électrique entre un système de conducteur primaire de l'installation et un enroulement secondaire d'une partie mobile de l'installation, ladite partie mobile étant mobile par rapport au système conducteur primaire, et procédé de fonctionnement d'une installation, l'enroulement secondaire étant connecté à des condensateurs de manière à former un circuit oscillant, la partie mobile présentant un commutateur commandable au moyen duquel le circuit oscillant peut être désaccordé et/ou au moyen duquel au moins une sous-zone du circuit oscillant peut être court-circuitée.
EP21835219.3A 2021-01-26 2021-12-08 Installation de transfert inductif d'énergie électrique et procédé de fonctionnement d'une installation Pending EP4285461A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021000377 2021-01-26
PCT/EP2021/084834 WO2022161678A1 (fr) 2021-01-26 2021-12-08 Installation de transfert inductif d'énergie électrique et procédé de fonctionnement d'une installation

Publications (1)

Publication Number Publication Date
EP4285461A1 true EP4285461A1 (fr) 2023-12-06

Family

ID=79171328

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21835219.3A Pending EP4285461A1 (fr) 2021-01-26 2021-12-08 Installation de transfert inductif d'énergie électrique et procédé de fonctionnement d'une installation

Country Status (3)

Country Link
EP (1) EP4285461A1 (fr)
DE (1) DE102021006055A1 (fr)
WO (1) WO2022161678A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006022223A1 (de) 2006-05-11 2007-11-15 Sew-Eurodrive Gmbh & Co. Kg Anlagenteil und Anlage
US9680326B2 (en) * 2012-12-28 2017-06-13 Avago Technologies General Ip (Singapore) Pte. Ltd. Power transfer architecture employing coupled resonant circuits
DE102013215785B4 (de) 2013-08-09 2015-04-02 Continental Automotive Gmbh Fahrzeugseitiges Lademodul, induktives Ladesystem und Verfahren zum induktiven Laden eines Energiespeichers
DE112019003274A5 (de) 2018-06-29 2021-03-11 Brusa Elektronik Ag Primärkreisvorrichtung, Sekundärkreisvorrichtung und System zum induktiven Laden

Also Published As

Publication number Publication date
DE102021006055A1 (de) 2022-07-28
WO2022161678A1 (fr) 2022-08-04

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