WO2017202569A2 - Alimentation à découpage à cadence primaire - Google Patents

Alimentation à découpage à cadence primaire Download PDF

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Publication number
WO2017202569A2
WO2017202569A2 PCT/EP2017/060078 EP2017060078W WO2017202569A2 WO 2017202569 A2 WO2017202569 A2 WO 2017202569A2 EP 2017060078 W EP2017060078 W EP 2017060078W WO 2017202569 A2 WO2017202569 A2 WO 2017202569A2
Authority
WO
WIPO (PCT)
Prior art keywords
primary
circuit branch
power supply
switching power
switching
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.)
Ceased
Application number
PCT/EP2017/060078
Other languages
German (de)
English (en)
Other versions
WO2017202569A3 (fr
Inventor
Max JEHLE
Vinay Channagiri VEERACHARY
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.)
Endress and Hauser SE and Co KG
Original Assignee
Endress and Hauser SE 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 Endress and Hauser SE and Co KG filed Critical Endress and Hauser SE and Co KG
Publication of WO2017202569A2 publication Critical patent/WO2017202569A2/fr
Publication of WO2017202569A3 publication Critical patent/WO2017202569A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/041—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using a short-circuiting device
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/04—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
    • H02H7/042—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers for current transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. DC/AC converters
    • H02H7/1227—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. DC/AC converters responsive to abnormalities in the output circuit, e.g. short circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/042—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage comprising means to limit the absorbed power or indicate damaged over-voltage protection device
    • 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
    • H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
    • H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
    • H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
    • H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33507—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters

Definitions

  • the invention relates to a primary-switched switching power supply and a field device with such a switching power supply.
  • Switched-mode power supplies are used today in virtually all electronic devices, both in the private consumer sector, for example in a television, as well as in industrial environments, for example in a field device of automation technology.
  • Such field devices of automation technology are used for detecting and / or influencing process variables.
  • Examples of such field devices are level gauges, mass flowmeters, pressure and temperature measuring devices, pH redox potential measuring devices,
  • field device also includes e.g. a gateway, a radio adapter or other bus users integrated / integrable into a bus system.
  • crowbar circuits are used today, which limit the output voltage of the switching power supply as a last resort.
  • a secondary-side thyristor is triggered in the event of a fault, in particular in the case of an overvoltage, which causes a short circuit between the output voltage and a ground.
  • the secondary-side current rises to such an extent that a fuse blows and the secondary-side current is interrupted, so that the circuit to be supplied to the downstream device from the primary side of
  • Switching power supply is disconnected.
  • a control loop which also typically has a switching power supply, of the
  • the introduced power can only be dissipated via a primary-side circuit branch region with an additional primary winding of the transformer, whereby this primary-side
  • Temperature class 6 according to which a maximum surface temperature may not rise above 85/80 ° C, can not be met. Furthermore, there is dangerous voltage in the circuit of the switching power supply, although it is supplied with only relatively low voltages.
  • the object is achieved by a Primschenaktaktetes switching power supply and a field device of automation technology.
  • the object is achieved by a primary-clocked switched-mode power supply for converting an input voltage into an output voltage, wherein the switched-mode power supply comprises at least the following:
  • a first switch element which can be switched by a control signal and which is arranged in the primary-side circuit branch in such a way that it triggers the primary-side fuse when switching by the control signal;
  • a first feedback element which is designed such that it leads the control signal from the secondary-side circuit branch via the galvanic isolation to the primary side arranged first switching element and in case of failure, especially in the case of an overvoltage, the first switching element based on the control signal, so that the primary side Circuit branch is essentially de-energized.
  • a primary-side fuse is destroyed instead of the secondary-side fuse. Since both the electrical safety as well as for the Ex area a galvanic isolation is required, is a Control signal from the secondary side via the galvanic isolation led to the primary side and in case of failure, for example
  • Switching element comprises a thyristor, a field effect transistor or a relay.
  • Primary winding is arranged in a first circuit branch region of the primary-side circuit branch.
  • the development provides that the first circuit branch region has a second switching element which is in series with the first primary winding and the first
  • the development can provide that the first circuit branch region is a control unit for driving the second
  • the transformer has a second primary winding, which is arranged in a second circuit branch region and the second
  • Control unit is used.
  • the training provides that the
  • Circuit branch is arranged so that the first circuit branch region is substantially free of stress.
  • a start-up circuit is provided in the first circuit branch region, which supplies the control unit with the required energy when starting.
  • the switching power supply further comprises a second feedback element, which is designed such that it is a feedback signal from
  • secondary-side circuit branch leads via the galvanic isolation to the primary side arranged control unit, so that the control unit controls the second switching element for clocking the first primary winding according to the feedback signal.
  • the first and / or the second feedback element comprises at least one optical coupling element, preferably an optocoupler.
  • Feedback element comprise a capacitive or inductive coupler.
  • the object is achieved by a field device of
  • FIG. 1 shows a circuit of a primary-switched switching power supply without security measures according to the invention
  • Fig. 2 shows an example of a circuit of the invention
  • Fig. 3 shows an example of the current through the invention in the
  • FIG. 1 shows a primary-clocked switched mode power supply 1, which has a
  • Switching power supply 1 comprises a first circuit branch region with at least one input connection 14, a rectification unit 15, a
  • Start-up circuit 12 a first primary winding of a transformer 16, a second switching element 9 and a control unit 10th
  • the input terminal 14 serves to connect or apply a
  • Input voltage U a to the switching power supply 1.
  • both an AC wide-range input voltage of typically 80 to 253 V AC and a DC input voltage of typically 18 to 65 V DC can be applied to the input terminal 14.
  • the input voltage U e in the case of being an AC voltage, is rectified by the rectifying unit 15.
  • Such rectifying units 15 generally comprise a bridge rectifier, which consists of four diodes 18.
  • the rectified input voltage is then fed to a start-up circuit 12, which in the starting phase, typically only the first clock cycles, for the switching power supply 1, the required electrical
  • the control unit 10 Based on the electric power provided by the starting circuit 12, the control unit 10 is operated, which serves to drive the second switching element 9 with a corresponding clock frequency. Usual clock frequencies lying after power, between 20 and 300 kHz. Modern control units or control blocks are due to the high clock frequencies and duty cycles of up to 80% capable of correspondingly high performance to drive.
  • the second switching element 9, for example a transistor, is connected in series with a first primary winding 8 of the transformer 16 and clocks the first primary winding 8
  • control unit 10 in accordance with the predetermined by the control unit 10 clock frequency, so as to remove energy portions of the input voltage U e and to a Secondary winding 17 of the transformer 16 in the secondary side
  • Circuit branch 4 to transmit or transform. On the basis of these transmitted energy portions, a consumer who is at the
  • secondary-side circuit branch can be connected to provide energy.
  • the primary-side circuit branch of the switched-mode power supply shown in FIG. 1 comprises a second circuit branch region, which is shown in FIG.
  • the second circuit branch region comprises at least a second primary winding 1 1 of the transformer 16, wherein the second primary winding 1 1 such on other components, for example.
  • the secondary-side circuit branch 4 comprises, as already mentioned, the secondary winding 17 of the transformer 16 and a smoothing means 20 for smoothing the discontinuous energy flow via the transformer 16.
  • the smoothing means comprises a smoothing diode 20.
  • the secondary-side circuit branch 4 comprises a feedback circuit 19 , which is arranged to galvanically decouple a feedback signal from the secondary-side circuit branch 4 to the primary-side
  • a voltage reference 21 which is designed such that when the voltage applied to its input REF, a predetermined threshold, z. B. exceeds 2.5 V, the voltage reference 21 allows a current flow between its terminals C and A, so as to generate the feedback signal.
  • the galvanic decoupling may, for example, be realized by the feedback circuit 19, a second feedback element 13,
  • an optocoupler comprises, which connects the secondary-side and primary-side circuit branch with each other.
  • the second feedback element 13 may alternatively also comprise a capacitive or inductive coupling element.
  • circuit shown in Fig. 1 of the switching power supply 1 is shown greatly simplified and includes, for example. Not known from the prior art and initially mentioned security measures, in particular it does not include, as usual in the art, a secondary side arranged switching element and fuse. Furthermore, the circuit according to FIG. 1 does not include any measures with regard to electromagnetic
  • FIG. 2 shows by way of example a safety circuit according to the invention by which a switched-mode power supply, as shown, for example, in FIG. 1, has to be expanded, so that in the event of an error, for example in the case of an overvoltage, the switched-mode power supply is de-energized on the primary side, so that no further consequential errors occur and / or thermal loads occur more.
  • Fig. 1 shows an AC switching power supply
  • inventive teaching but can be easily transferred to a DC / DC power supply.
  • Feedback circuit 19 is connected in the switching power supply 1.
  • the security circuit comprises at least in the primary-side
  • Circuit branch 2 a fuse 5, preferably a fuse, which interrupts the primary-side current flow l P mär when exceeding a defined current for a defined period of time and a first
  • the first switching element 6 which is switchable by a control signal.
  • the first switching element 6 is arranged such that when switching the primary-side fuse 5 is triggered. This can be realized, for example, that the fuse 5 by the series-connected first Switching element 6 is connected to the ground when the first switching element 6 switches, that is conductive.
  • the first switching element 6 alternatively a
  • Field effect transistor or a relay include. The first
  • Feedback element 7 preferably comprises an optocoupler for galvanically separated transmission of the control signal.
  • the first feedback element 7 may comprise a capacitive or inductive coupling element.
  • Circuit branch 4 arranged voltage monitoring, which is realized in the simplest case in the form of a reverse-biased Zener diode, so that when exceeding a defined voltage value, the corresponding
  • FIG. 3 shows, by way of example, a family of measuring curves i) -v), which represent the
  • the primary-side fuse can be selected accordingly.
  • such a switching power supply can, for example, be used to operate a field device without causing problems in terms of electrical safety and Ex specifications.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

L'invention concerne une alimentation à découpage à cadence primaire (1) pour la conversion d'une tension d'entrée (Ue) en une tension de sortie (Ua), comprenant au moins : un fusible (5) qui est agencé dans la branche de circuit (2) côté primaire et qui est conçu pour interrompre un flux de courant côté primaire, de telle sorte que la branche de circuit (2) côté primaire est sensiblement exempte de tension; un premier élément de commutation (6) qui peut être commuté par un signal de commande et qui est agencé par rapport au fusible (5) dans la branche de circuit (2) côté primaire, de manière à déclencher le fusible (5) côté primaire lorsqu'il est commuté par le signal de commande; un premier élément de rétroaction (7), lequel est conçu de manière à guider le signal de commande de la branche de circuit (4) côté secondaire au premier élément de commutation (6) agencé côté primaire en passant par l'isolation galvanique (3) et, en cas de défaillance, en particulier dans le cas d'une surtension, à commuter le premier élément de commutation (6) sur la base du signal de commande, de telle sorte que la branche de circuit (2) côté primaire soit sensiblement exempte de tension.
PCT/EP2017/060078 2016-05-25 2017-04-27 Alimentation à découpage à cadence primaire Ceased WO2017202569A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016109649.0 2016-05-25
DE102016109649.0A DE102016109649A1 (de) 2016-05-25 2016-05-25 Primärgetaktetes Schaltnetzeil

Publications (2)

Publication Number Publication Date
WO2017202569A2 true WO2017202569A2 (fr) 2017-11-30
WO2017202569A3 WO2017202569A3 (fr) 2018-01-18

Family

ID=58668868

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/060078 Ceased WO2017202569A2 (fr) 2016-05-25 2017-04-27 Alimentation à découpage à cadence primaire

Country Status (2)

Country Link
DE (1) DE102016109649A1 (fr)
WO (1) WO2017202569A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108134600A (zh) * 2018-02-12 2018-06-08 中山市嘉科电子有限公司 一种开关信号隔离电路

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017111431A1 (de) 2017-05-24 2018-11-29 Endress+Hauser SE+Co. KG Primärgetaktetes Schaltnetzeil
DE102023209496A1 (de) * 2023-09-28 2025-04-03 Siemens Mobility GmbH Spannungswandler und Verfahren zum Betreiben eines Spannungswandlers

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CH553495A (de) * 1972-12-27 1974-08-30 Bbc Brown Boveri & Cie Ueberspannungsschutzeinrichtung fuer den ausgang mindestens eines stabilisierten netzgeraets.
DE3732334A1 (de) * 1987-09-25 1989-04-27 Kloeckner Moeller Elektrizit Einrichtung und schaltungsanordnung zum schutz gegen ueberstrom und ueberspannung
FR2670959A1 (fr) * 1990-12-21 1992-06-26 Thomson Csf Circuit de protection d'equipement electrique contre des surtensions de secteur.
US6418002B1 (en) * 2000-06-29 2002-07-09 System General Corp. Power supply supervisor having a line voltage detector
DE102009014252A1 (de) * 2009-03-20 2010-09-23 Siemens Aktiengesellschaft Feldgerät zur Prozessinstrumentierung
JP6040433B2 (ja) * 2011-09-28 2016-12-07 新電元工業株式会社 電力変換装置および該電力変換装置における過電圧保護方法
JP5210424B2 (ja) * 2011-10-05 2013-06-12 株式会社アイ・オー・データ機器 保護機能付きスイッチング電源回路およびそれを用いた電子機器

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108134600A (zh) * 2018-02-12 2018-06-08 中山市嘉科电子有限公司 一种开关信号隔离电路

Also Published As

Publication number Publication date
WO2017202569A3 (fr) 2018-01-18
DE102016109649A1 (de) 2017-11-30

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