EP3631958A1 - Alimentation à découpage à cadence primaire - Google Patents

Alimentation à découpage à cadence primaire

Info

Publication number
EP3631958A1
EP3631958A1 EP18724217.7A EP18724217A EP3631958A1 EP 3631958 A1 EP3631958 A1 EP 3631958A1 EP 18724217 A EP18724217 A EP 18724217A EP 3631958 A1 EP3631958 A1 EP 3631958A1
Authority
EP
European Patent Office
Prior art keywords
primary
circuit branch
side circuit
power supply
voltage
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.)
Withdrawn
Application number
EP18724217.7A
Other languages
German (de)
English (en)
Inventor
Max JEHLE
Max Bauer
Patrick Geib
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 EP3631958A1 publication Critical patent/EP3631958A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • H02H3/02—Details
    • H02H3/021—Details concerning the disconnection itself, e.g. at a particular instant, particularly at zero value of current, disconnection in a predetermined order
    • H02H3/023—Details concerning the disconnection itself, e.g. at a particular instant, particularly at zero value of current, disconnection in a predetermined order by short-circuiting
    • 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
    • H02H7/10—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
    • 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
    • H02H7/1213—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 DC-DC converters
    • 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
    • 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
    • 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
    • H02M3/33523—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 with galvanic isolation between input and output of both the power stage and the feedback loop
    • 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
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H02M1/0006—Arrangements for supplying an adequate voltage to the control circuit of converters
    • 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
    • H02M1/36—Means for starting or stopping converters

Definitions

  • the invention relates to a primary-clocked 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.
  • field devices of automation technology are used for detecting and / or influencing process variables. Examples of such field devices are level gauges, mass flow meters, pressure and
  • Temperature measuring devices pH redox potential measuring devices, conductivity measuring devices, etc., which detect the corresponding process variables level, flow, pressure, temperature, pH value or conductivity value as sensors. For influencing
  • Process variables serve so-called actuators, z.
  • actuators As valves that control the flow of a liquid in a pipe section or pumps that change the level in a container.
  • field devices all devices that are used close to the process and supply or process the process-relevant information are referred to as field devices.
  • field device used in connection with the invention, all types of measuring devices and actuators are thus to be subsumed.
  • field device also includes e.g. a gateway, a radio adapter or other bus users integrated / integrable into a bus system. A large number of such field devices are manufactured and distributed by the Endress + Hauser group of companies.
  • Input voltage can be applied, and a secondary side, at the one
  • Output voltage can be tapped off.
  • the energy is transmitted by a high clocking of a transformer to the secondary side.
  • security measures are implemented in the switched-mode power supply.
  • so-called crowbar circuits are used today, which limit the output voltage of the switching power supply as a last resort.
  • a secondary-side thyristor is ignited in the event of a fault, in particular in the case of an overvoltage Short circuit between the output voltage and a ground causes.
  • the secondary-side current increases to such an extent that a fuse burns out and the secondary-side current is interrupted so that the circuit to be supplied of the downstream device is disconnected from the primary side of the switched-mode power supply.
  • a control loop which likewise typically has a switched-mode power supply, is disconnected from the primary side of the switched-mode power supply, so that the switched-mode power supply recognizes on the primary side that the secondary-side output voltage is too low and controls accordingly.
  • the switched-mode power supply recognizes on the primary side that the secondary-side output voltage is too low and controls accordingly.
  • the output voltage increases up to several 100 volts.
  • the introduced power can only be provided via a primary-side
  • Circuit branch region are discharged with an additional primary winding of the transformer, whereby this primary-side circuit branch region is extremely loaded. This leads to the fact that the components involved become very hot and thus specific temperature classes for intrinsic safety, in particular the
  • 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 invention has for its object to propose a switching power supply, which turns off in the event of an error as safe as possible or out of service.
  • Input voltage into an output voltage comprises at least:
  • one of the primary-side circuit branch separate secondary-side circuit branch on which the output voltage can be tapped;
  • secondary-side circuit branch which comprises at least one transformer, wherein the transformer at least one in the primary side
  • Circuit branch arranged first primary and arranged in the secondary-side circuit branch first secondary winding for electrically isolated energy transfer from the primary side to the secondary side
  • the transformer further comprises one in the primary side Circuit branch disposed second primary winding for supplying power to at least parts of the primary-side circuit branch;
  • a fuse arranged in the primary-side circuit branch and configured to interrupt a primary-side current flow so that the primary-side circuit branch is essentially free of voltage
  • a first switchable switching element which is arranged in the primary-side circuit branch for securing such that it triggers the primary-side fuse when switching;
  • Circuit branch arranged monitoring unit which is adapted to monitor a characteristic of the second primary winding electrical signal and in the event that the characteristic electrical signal exceeds a threshold, the first switching element switches, so that the primary-side fuse is triggered.
  • An advantageous embodiment of the invention provides that the characteristic electrical signal is dependent on the second primary winding voltage signal, in particular a voltage applied to the output of the second primary winding
  • Voltage signal includes.
  • a further advantageous embodiment of the invention further provides for a diode arranged in the primary-side circuit branch, the diode having an anode connected to the second primary winding and the characteristic electrical signal comprising a voltage signal applied to a cathode of the diode.
  • Monitoring unit comprises at least one comparator, in particular a Schmitt trigger, to which the electrical signal is supplied and which compares the electrical signal with the threshold and in the case that the electrical signal exceeds the threshold, the first switching element switches.
  • comparator in particular a Schmitt trigger
  • Monitoring unit has an RC element, which in such a way with the second
  • the embodiment can provide that the RC element and the comparator are connected to one another in such a way that the comparator is supplied with the voltage summed up by the RC element, and wherein the comparator compares the accumulated voltage with the threshold value.
  • a further advantageous embodiment of the invention provides that the comparator is connected in such a way that the threshold value is supplied at a first input. Again, an advantageous embodiment of the invention provides that the comparator is further connected such that at a second input, the electrical signal is supplied. A further advantageous embodiment of the invention provides that the first
  • Switching element comprises a thyristor, a transistor, in particular a field effect transistor, or a relay.
  • a further advantageous embodiment of the invention provides that the primary-side circuit branch has a second switching element, which in series with the first
  • the embodiment can provide that the primary-side circuit branch has a control unit connected to the second switching element for driving the second switching element and / or that in the primary-side circuit branch a start-up circuit is provided, which supplies the control unit at start with the required energy.
  • the embodiment may comprise at least one first feedback element, which is designed such that it carries a feedback signal from the secondary-side circuit branch 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 and or that the first feedback element comprises at least one optical coupling element, preferably an optocoupler or an infrared light emitting diode.
  • the object is achieved by a field device of
  • Automation technology solved which comprises at least a primary-switched switching power supply according to one of the embodiments described above.
  • Fig. 2 an inventively configured circuit of a Primäraktakteten
  • FIG. 1 shows a primary-clocked switched-mode power supply 1, which has a primary-side
  • the primary-side circuit branch 2 of the switched-mode power supply 1 shown in FIG. 1 comprises a first circuit branch region with at least one input connector a rectifying unit 15, a starting circuit 12, a first primary winding of a transformer 16, a second switching element 9 and a control unit 10.
  • 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.
  • rectified input voltage U e is then fed to a start-up circuit 12, which provides the required electrical energy for the switching power supply 1 in the start phase, typically only the first clock cycles.
  • a start-up circuit 12 which provides the required electrical energy for the switching power supply 1 in the start phase, typically only the first clock cycles.
  • Regulating unit 10 operated, which serves to drive the second switching element 9 with a corresponding clock frequency.
  • Typical clock frequencies are, depending on the 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% in a position
  • 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 according to 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 which can be connected to the secondary-side circuit branch can be supplied with energy. Furthermore, the primary-side circuit branch 2 of the illustrated in Fig. 1
  • Switching power supply a second circuit branch region which essentially serves to supply power to the control unit 10.
  • the second circuit branch region comprises at least a second primary winding 1 1 of the transformer 16.
  • the second primary winding 1 1 is so on other components, for example.
  • the secondary-side circuit branch 4 comprises, as already mentioned, the
  • the smoothing means comprises a smoothing diode 20.
  • the secondary-side circuit branch 4 comprises a feedback circuit 19, which is adapted to a
  • 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, the more so
  • the galvanic decoupling can be realized, for example, by the feedback circuit 19 comprising a first feedback element 13, which connects the secondary-side and primary-side circuit branch to one another.
  • the 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 compatibility (EMC).
  • EMC electromagnetic compatibility
  • FIG. 2 shows by way of example a circuit designed according to the invention
  • FIGS. 1 and 2 show an AC switching power supply, the teaching according to the invention can also be transferred without problems to a DC / DC power supply.
  • the monitoring unit 7, the first switching element 6 and the primary-side fuse 5 are used in the event of an error, for example. In case of overvoltage, the switching power supply 1 primary side to de-energize, so that no further consequential errors and / or thermal loads occur more. Because of that, both the
  • Monitoring unit 7 and the first switching element 6 are arranged on the primary side, a transmission of a signal for driving the first switching element 6 from the secondary side to the primary side via the electrical isolation 3 is not necessary. This allows the switching power supply according to the invention in an advantageous manner at
  • the exemplary solution according to the invention shown in FIG. 2 comprises, at least in the primary-side circuit branch 2, a fuse 5, preferably one
  • Fuse which interrupts the primary-side current flow l r imär when exceeding a defined current for a defined period of time. So that the fuse 5 interrupts the primary-side current flow is also a first switching element 6, which is switchable by a control signal, provided on the primary side of the switching power supply.
  • the first switching element 6 is arranged in such a way in the primary-side circuit branch that when switching the primary-side fuse 5 is triggered. This can be realized, for example, that the fuse 5 by the first
  • Switching element 6 is connected to the ground when the first switching element 6 switches, i. E. is conductive.
  • the first switching element 6, which preferably comprises a thyristor or field effect transistor, is controlled by a monitoring unit such that it is in
  • the first switching element 6 may alternatively comprise a bipolar transistor or a relay.
  • the monitoring unit 7 comprises a comparator 7b, for example a Schmitt trigger, which has a threshold value at a first input (negative pole or inverting input) and an electrical signal at a second input (positive pole or non-inverting input). which is determined or defined by the second primary winding 11, is supplied.
  • the electrical signal may include, for example, a voltage signal applied across the second primary winding of the transformer. The voltage signal can either at an output of the second primary winding 1 1, i.
  • the voltage signal is tapped example of the diode at the cathode and fed to the comparator.
  • the voltage signal is tapped example of the diode at the cathode and fed to the comparator.
  • a characteristic electrical signal can also be used as a characteristic electrical signal.
  • the characteristic electrical signal can, in principle, be fed directly to the comparator 7b, ie without further electrical components. It is advantageous, however, the electrical signal, in particular in the case that this comprises the voltage signal to supply via an RC element (resistor-capacitor element) 7a to the comparator 7b.
  • the RC element 7a has an accumulating effect on the electrical signal, so that a pure peak detection is not performed by the comparator 7b. This offers the advantage that the electrical signal is less susceptible to interference, especially with regard to EMC interference.
  • an adaptation unit 7d for adaptation, in particular voltage adjustment, of the characteristic electrical signal may be provided, to which the electrical signal or the accumulated signal is supplied.
  • the adaptation unit 7d comprises a voltage divider with two resistors connected in series with each other, which are dimensioned such that a level, in particular a
  • the characteristic electrical signal or the summed signal is brought to a desired level.
  • the desired level is dependent on a threshold value which is supplied via a threshold value circuit 7c to the comparator 7b as a comparison reference.
  • the threshold value in turn is determined by the threshold circuit 7c in dependence on whether the electrical signal is picked up directly at the output of the second primary winding 11 or at the cathode of the diode 22.
  • the threshold circuit 7c comprises a zener diode and a resistor connected in series therewith, wherein the threshold via a center tap between the zener diode and the resistor to the first input (neg. Pol or inverting input) of the comparator 7b is guided.
  • the comparator 7b is arranged to compare the supplied electrical signal with the threshold value and, depending on the comparison, the first one
  • Control element 6 via a control signal.
  • the comparator 7b illustrated in FIG. 2 compares the supplied electrical signal with the threshold value and provides at an output the control signal which indicates whether the electrical signal or the threshold value is higher. If the electrical signal at the second input (positive or non-inverting input) is higher than the threshold value applied to the first input (negative or inverting input), then the control signal approaches a positive supply voltage of the comparator 7b that the first switching element 6 is switched or triggered by the control signal and the fuse 5 triggers. By triggering the fuse 5, the primary-side current flow l r is then imär interrupted and the switching power supply is set on the primary side out of action. LIST OF REFERENCE NUMBERS

Landscapes

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

Abstract

L'invention concerne une alimentation à découpage (1) à cadence primaire servant à convertir une tension d'entrée (Ue) en une tension de sortie (Ua). L'alimentation à découpage à cadence primaire comprend au moins : une branche de circuit côté primaire (2), sur laquelle la tension d'entrée (Ue) peut être appliquée ; une branche de circuit côté secondaire (4) séparée de la branche de circuit côté primaire (2), sur laquelle la tension de sortie (Ua) peut être appliquée ; une séparation (3) galvanique entre la branche de circuit côté primaire et la branche de circuit côté secondaire (4) ; un fusible (5) disposé dans la branche de circuit côté primaire (2) afin de commuter sensiblement sans tension la branche de circuit côté primaire (2) ; un premier élément de commutation (6) commutable, qui est disposé dans la branche de circuit côté primaire (2) de telle manière qu'il déclenche le fusible (5) côté primaire lors de la commutation ; une unité de surveillance (7) reliée au premier élément de commutation et disposée dans la branche de circuit côté primaire (2), laquelle est mise au point pour surveiller un signal électrique caractéristique défini par le deuxième enroulement primaire (11) et qui commute le premier élément de commutation (6) en cas de dépassement d'une valeur de seuil.
EP18724217.7A 2017-05-24 2018-05-09 Alimentation à découpage à cadence primaire Withdrawn EP3631958A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017111431.9A DE102017111431A1 (de) 2017-05-24 2017-05-24 Primärgetaktetes Schaltnetzeil
PCT/EP2018/062059 WO2018215215A1 (fr) 2017-05-24 2018-05-09 Alimentation à découpage à cadence primaire

Publications (1)

Publication Number Publication Date
EP3631958A1 true EP3631958A1 (fr) 2020-04-08

Family

ID=62152560

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18724217.7A Withdrawn EP3631958A1 (fr) 2017-05-24 2018-05-09 Alimentation à découpage à cadence primaire

Country Status (5)

Country Link
US (1) US10971917B2 (fr)
EP (1) EP3631958A1 (fr)
CN (1) CN110679070B (fr)
DE (1) DE102017111431A1 (fr)
WO (1) WO2018215215A1 (fr)

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JP5811246B1 (ja) 2014-07-25 2015-11-11 Smk株式会社 Ｄｃ−ｄｃコンバータ
DE102016109649A1 (de) 2016-05-25 2017-11-30 Endress + Hauser Gmbh + Co. Kg Primärgetaktetes Schaltnetzeil

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US20200177086A1 (en) 2020-06-04
CN110679070A (zh) 2020-01-10
DE102017111431A1 (de) 2018-11-29
WO2018215215A1 (fr) 2018-11-29
CN110679070B (zh) 2021-08-10

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