WO2013030156A2 - Appareil ménager comprenant une circuiterie électrique ayant un mode de veille et un mode de fonctionnement ainsi que procédé pour faire fonctionner une circuiterie d'un appareil ménager - Google Patents

Appareil ménager comprenant une circuiterie électrique ayant un mode de veille et un mode de fonctionnement ainsi que procédé pour faire fonctionner une circuiterie d'un appareil ménager Download PDF

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Publication number
WO2013030156A2
WO2013030156A2 PCT/EP2012/066610 EP2012066610W WO2013030156A2 WO 2013030156 A2 WO2013030156 A2 WO 2013030156A2 EP 2012066610 W EP2012066610 W EP 2012066610W WO 2013030156 A2 WO2013030156 A2 WO 2013030156A2
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WO
WIPO (PCT)
Prior art keywords
voltage
smoothing capacitor
primary
amplitude
mode
Prior art date
Application number
PCT/EP2012/066610
Other languages
German (de)
English (en)
Other versions
WO2013030156A3 (fr
Inventor
Lubos Hajduk
Anton Chomic
Robert Elko
Original Assignee
BSH Bosch und Siemens Hausgeräte GmbH
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 BSH Bosch und Siemens Hausgeräte GmbH filed Critical BSH Bosch und Siemens Hausgeräte GmbH
Publication of WO2013030156A2 publication Critical patent/WO2013030156A2/fr
Publication of WO2013030156A3 publication Critical patent/WO2013030156A3/fr

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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
    • 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
    • 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
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/005—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting using a power saving mode
    • 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
    • H02M1/0032—Control circuits allowing low power mode operation, e.g. in standby mode
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems

Definitions

  • the invention relates to a household appliance with an electrical circuit arrangement which can be switched between an operating mode and a standby mode.
  • the circuit arrangement has a circuit input which has a first and a second input connection, between which an alternating voltage
  • the circuit also includes a line filter coupled to the circuit input. It also includes a rectifier downstream of the line filter, which rectifier for rectifying
  • Smoothing capacitor is used for smoothing the rectified AC voltage, so that applied to the smoothing capacitor, a primary DC voltage.
  • Circuitry also includes a coupled to the smoothing capacitor switching power supply, which picks up the primary DC voltage on the smoothing capacitor and is adapted to a tapped from the primary DC voltage
  • the switching power supply has a transformer, which a
  • Secondary winding comprises, at which the secondary voltage can be tapped for the electrical load.
  • the switching power supply also has a switched with the primary winding in series switching device, which is used to control a
  • the circuit arrangement has means for reducing the amplitude of the primary DC voltage in the standby mode, so that the amplitude of the primary DC voltage in the standby mode is lower than in the operating mode.
  • the invention also relates to a method for operating such a circuit arrangement of a household appliance. It is state of the art that a home appliance can be switched between a normal mode and a standby mode.
  • the standby mode is also referred to as a standby mode. In such a standby mode, electrical energy is to be saved. Therefore, most of the home appliance's electrical appliances are turned off in standby mode; only a standby control unit can be activated, which can switch the household appliance back into the operating mode.
  • the standby controller may
  • Receive control signals from an operating device of the household appliance and then switch the household appliance in the operating mode or activate when the user makes a corresponding input to the operating device.
  • a household appliance with a circuit arrangement of the type mentioned is known for example from the document EP 0 873 651 B1. This known
  • Circuit arrangement includes a switching power supply having a primary winding and two secondary windings. Parallel to the primary winding is a
  • the circuit arrangement includes a device which generates the primary DC voltage from the AC voltage in standby mode.
  • the device is designed such that the amplitude of the primary DC voltage at the smoothing capacitor in standby mode is lower than in the operating mode.
  • the device may be formed by the X capacitors of a network filter.
  • the device may include a transistor, so that the device according to the principle of
  • the circuit arrangement according to document EP 0 873 651 B1 has the disadvantage that the device for reducing the amplitude of the primary DC voltage is relatively complicated and has a multiplicity of components which are required for reducing the amplitude of the primary DC voltage.
  • This circuit thus claimed on the one hand relatively much space; On the other hand, it is also relatively expensive, because active components - such as transistors - must be used.
  • the device for reducing the amplitude of the primary DC voltage is therefore also unsuitable, integrated into existing circuit arrangements especially in those already existing
  • An inventive household appliance comprises an electrical circuit arrangement which between an operating mode - corresponds to an operating mode of the
  • the circuit arrangement comprises a circuit input having a first and a second input terminal, between which an AC voltage can be applied.
  • the circuit input is a line filter (so-called EMC filter, electromagnetic compatibility) coupled.
  • the line filter is followed by a rectifier for rectifying the AC voltage.
  • the rectifier in turn is followed by a smoothing capacitor, which is designed to smooth the rectified AC voltage, so that on the
  • Smoothing capacitor is applied a primary DC voltage.
  • the smoothing capacitor is a switching power supply coupled to the smoothing capacitor
  • the smoothing capacitor can also be integrated in the switched-mode power supply.
  • the switching power supply has a transformer.
  • the transformer includes a primary winding coupled to the smoothing capacitor, as well as a secondary winding to which the secondary voltage for the electrical load can be tapped.
  • the switching power supply also has a switching device connected in series with the primary winding, which switching device is designed to control a current flow through the primary winding.
  • the circuit also includes means for reducing the amplitude of the primary DC voltage in standby mode so that the amplitude of the DC primary voltage in standby mode is lower than in the operating mode.
  • the means for reducing the amplitude have a different from the line filter and in series with the switching power supply switched current limiting element, which is designed to limit the current strength of a current flowing through the smoothing capacitor charging current.
  • an electrical switch which is connected in parallel to the current limiting element and by means of which the
  • the effect of the invention is achieved in that the means for reducing the amplitude of a passive component - especially only a single
  • Component - includes a passive current limiting element connected in series with the switching power supply and limits the current flow to the smoothing capacitor in the standby mode to a value greater than zero, so that the smoothing capacitor is charged slower in standby mode than in the operating mode.
  • the current limiting element is bridged by means of the switch. In standby mode thus electrical energy is saved, because the electrical power, which is consumed by the switching power supply or the smoothing capacitor, is by the
  • the household appliance according to the invention has the advantage that the means for reducing the amplitude are particularly simple and thus space-saving and cost-reduced, so that these means without much
  • Housekeeping is used. This may for example be a large household appliance, such as a washing machine, a tumble dryer, a Dishwasher, a cooking appliance, an extractor hood or a refrigerator, such as a refrigerator, a freezer or a fridge-freezer. But this can also be a small household appliance, such as a coffee machine or a food processor.
  • the current limiting element may be an ohmic resistor. However, it proves to be particularly advantageous if the current limiting element is a current limiting capacitor.
  • a capacitive voltage divider can be formed, which ensures the reduction of the amplitude of the primary DC voltage in standby mode. This capacitive voltage divider thus contains on the one hand the current limiting capacitor and on the other hand also already existing in the household appliance anyway.
  • the means for reducing the amplitude preferably include only a single component. Waiving further components, these means can therefore only the current limiting element - in particular the
  • the circuit arrangement can be designed so that only the current limiting element can be bridged with the electrical switch. It is therefore unnecessary bridging other components with the associated
  • the switching device may comprise a Zener diode whose cathode is connected to the
  • Primary winding and the anode are coupled to a reference potential (ground).
  • An electric current flows through the primary winding when the amplitude of the primary DC voltage dropping across the smoothing capacitor reaches one of the
  • Breaking voltage of the Zener diode dependent threshold exceeds.
  • the zener diode causes the current flow through the primary winding, if one at this
  • Capacitor voltage applied exceeds the breakdown voltage of the Zener diode. In this way, it is possible to generate a rectangular or alternating current flow through the primary winding, so that the energy of the
  • Primary winding can be transmitted to the secondary winding. Namely, when the amplitude of the capacitor connected in parallel with the zener diode reaches the breakdown voltage of the zener diode, the zener diode is turned on so that electric current flows through the primary winding. The parallel to the Zener diode switched
  • Capacitor is then discharged, and the zener diode locks again. Because the
  • Smoothing capacitor is significantly larger than the parallel connected to the Zener diode capacitor and is designed for operation at higher voltages, the small capacitor is charged again with electrical energy, and the zener diode is turned on again. This switching process is repeated until the smoothing capacitor is discharged and the amplitude of the primary DC voltage again reaches a minimum.
  • the current limiting element may be dimensioned such that in the standby mode, a charging process of the smoothing capacitor lasts longer than its discharging process effected by the switching device. After a switching operation of the switching device then the current flow through the primary winding is blocked until the
  • Smoothing capacitor is recharged and the amplitude of the primary DC voltage again reaches the threshold. Between the switching operations of the switching device thus takes place in each case a charging of the smoothing capacitor. Unlike in the Operating mode in which the smoothing capacitor bypassing the
  • the current-limiting element can always be charged continuously and the switching device can continuously cause the flow of current through the primary coil, electrical energy is saved in standby mode, therefore, because the switching device is only temporarily turned on.
  • the current-limiting element can be dimensioned such that just an electrical charging current can flow through the smoothing capacitor, which causes slow charging of the battery
  • Standby state electrical energy can be transferred from the primary side to the secondary side; On the other hand, the energy consumption in standby mode is particularly low.
  • the secondary voltage can be tapped.
  • the secondary winding may also be followed by a rectifier - such as a diode -, and parallel to the secondary winding, a capacitor may be connected, which smoothes the secondary voltage, so that at this capacitor
  • Secondary DC voltage can be tapped.
  • the electrical load can be supplied with this smoothed secondary DC voltage.
  • Such a consumer may be, for example, said electrical switch, which serves to bridge the current limiting element.
  • the secondary voltage can therefore be used to close the electrical switch and thereby to switch the circuit arrangement from the standby mode to the operating mode.
  • the household appliance can thus always be reliably and effectively switched to the operating mode.
  • such an electrical load can also be a standby control unit, which is supplied with the secondary voltage in standby mode.
  • This standby control unit can monitor in standby mode whether operator signals present, due to which the electrical switch is closed and the household appliance to be switched to the operating mode.
  • An inventive method is designed for operating a circuit arrangement of a household appliance, which is switched between an operating mode and a standby mode. It will be an AC electrical voltage on one
  • the alternating voltage is rectified by means of a rectifier connected downstream of a line filter.
  • the rectified AC voltage is smoothed by means of a rectifier downstream smoothing capacitor, so that on the smoothing capacitor
  • the primary DC voltage is at the
  • the switched-mode power supply comprises a transformer having a primary winding which is coupled to the smoothing capacitor and a secondary winding to which the secondary voltage for the electrical load is tapped.
  • the switching power supply further comprises a switching device connected in series with the primary winding, which controls a current flow through the primary winding.
  • the circuit arrangement also includes means which reduce the amplitude of the primary DC voltage in standby mode so that the amplitude of the primary DC voltage in the standby mode is lower than in the standby mode
  • the means for reducing the amplitude comprise a different from the line filter and connected in series to the switching power supply
  • 1 is a schematic representation of a circuit arrangement of a
  • FIG. 2 is a schematic representation of the circuit arrangement according to FIG. 1, wherein components of a switched-mode power supply are shown in detail;
  • FIG. 2 is a schematic representation of the circuit arrangement according to FIG. 1, wherein components of a switched-mode power supply are shown in detail;
  • FIG. 3 shows a schematic illustration of a switching device of the switched-mode power supply
  • 4a to 4c show a time course of a primary DC voltage, a temporal
  • a circuit arrangement 1 shown in FIG. 1 is used to operate a
  • Household appliance (not shown).
  • the circuit 1 - like the household appliance - can be switched back and forth between an operating mode and a standby mode.
  • the standby mode represents a power saving mode in which electrical energy is saved.
  • the circuit arrangement 1 comprises a circuit input 2 with a first input terminal 3 and a second input terminal 4, between which an electrical AC voltage UN (mains voltage) is applied when the circuit input connected to an electrical power grid.
  • a line filter 5 is connected, which is an EMC filter (electromagnetic compatibility).
  • This mains filter 5 includes a coil 6 connected to the first input terminal 3, and a parallel circuit comprising a capacitor 7 and a capacitor
  • the mains filter 5 is a rectifier 9 downstream, which, for example, a
  • Bridge rectifier can be.
  • the rectifier 9 is used to rectify the
  • Rectifier 9 is a switching power supply 10 is connected, which provides a secondary DC voltage US from the rectified AC voltage UG.
  • Secondary DC voltage US is an electrical load 1 1 - about a standby control unit - supplied.
  • a standby control unit - supplied Between the line filter 5 on the one hand and the rectifier 9 on the other hand is a
  • Current limiting capacitor 12 is arranged, which is connected in series with the switching power supply 10.
  • the current limiting capacitor 12 constitutes a current limiting element in the sense of the present invention.
  • an electrical switch 13 is connected, by means of which the
  • the switching of the household appliance from the operating mode to the standby mode thus takes place by opening the switch 13. And vice versa, the switching of the household appliance in the operating mode, ie the activation of the household appliance, by closing the electrical switch 13.
  • the switch 13 can as a Relay with a coil 14 may be formed.
  • the coil 14 may on the one hand be connected to an output 15 of the switched mode power supply 10 to which the secondary DC voltage US is applied;
  • the coil 14 may be coupled via a switching element 16 to a reference potential 17.
  • the switching element 16 may be, for example, an operating element which can be actuated by the user. Additionally or alternatively, the switching element 16 can be automatically actuated by means of the electrical load 1 1 (standby control unit). By closing the switching element 16 is a current flow caused by the coil 14, so that the electric switch 13 is closed and the household appliance is switched to the operating mode.
  • a circuit node 18 is arranged between the current limiting capacitor 12 on the one hand and the rectifier 9 on the other hand.
  • This circuit node 18 is coupled via a first voltage divider 19, which has three resistors 20, 21, 22, to one of the reference potential 17 galvanically isolated reference potential 17 '.
  • a voltage divider node 23 may be coupled to a control unit ( ⁇ ). This allows the control unit to measure the voltage applied to the circuit node 18 electrical voltage. Via a second voltage divider 24 with resistors 25, 26, 27, the control unit can detect a frequency of the AC voltage UN. For this purpose, another voltage divider node 28 is connected to the control unit.
  • circuit arrangement 1 is shown in detail, wherein the sake of clarity, the representation of the second voltage divider 24 has been omitted. Likewise, the representation of the network filter 5 has been omitted.
  • the rectifier 9 includes four rectifier diodes and is designed as a bridge rectifier.
  • the rectifier 9, the switching power supply 10 is connected downstream, which is now shown in detail in Fig. 2.
  • the switching power supply 10 includes a smoothing capacitor 29, which is connected downstream of the rectifier 9 and is located between a node 30 and a reference potential 31.
  • Smoothing capacitor 29 is designed for operation at relatively high voltages, namely at voltages of 400V.
  • the smoothing capacitor 29 is used for smoothing the rectified voltage UG, so that on the smoothing capacitor
  • the smoothing capacitor 29 may be integrated into the switched-mode power supply 10 or it may be a separate component from the switched mode power supply 10.
  • the switching power supply 10 includes a transformer 32, which has a primary winding 33 on the one hand and a secondary winding 34 on the other hand. In series to
  • Primary winding 33 is connected to a switching device 35, which is used to control a current flow through the primary winding 33 and thus for controlling the Energy transfer from the primary winding 33 to the secondary winding 34 is formed.
  • a switching device 35 which is used to control a current flow through the primary winding 33 and thus for controlling the Energy transfer from the primary winding 33 to the secondary winding 34 is formed.
  • the primary winding 33 namely with the
  • the switching device 35 is also coupled via a capacitor 36 to the reference potential 31.
  • the switching power supply 10 includes a rectifier 37, which is electrically connected to the secondary winding 34 and formed in the embodiment in the form of a single diode. The cathode of this diode is coupled via a capacitor 38 to the secondary-side reference potential 17, so that the capacitor 38 is connected substantially parallel to the secondary winding 34.
  • This secondary voltage US is rectified by means of the rectifier 37 and smoothed by means of the capacitor 38, so that the above-mentioned secondary DC voltage US applied to the capacitor 38, which can be tapped from the electrical load 1 1 and serve to close the electrical switch 13.
  • Fig. 3 is a schematic diagram of the switching device 35 is shown, wherein the
  • Fig. 3 has been dispensed with the representation of the primary winding 33 and other components.
  • Primary winding 33 is however - as shown in Fig. 2 - connected in series with the switching device 35, namely between a node 39 and the switching device 35.
  • the smoothing capacitor 29 is connected, ie between the Node 39 and the
  • the switching device 35 comprises a Zener diode 40, the cathode of which is connected to a node 41 and whose anode is connected to the reference potential 31.
  • the smoothing capacitor 29 is designed to operate at high voltages, namely at voltages of about 400V
  • the capacitor 36 is designed to operate at lower voltages, namely at voltages of about 10V to 16V.
  • the capacitor 36 is thus dimensioned significantly smaller than the smoothing capacitor 29.
  • a device 42 is connected between the two nodes 39 and 41, which, for example, as
  • Voltage regulator or voltage divider or as a resistor with a dynamically variable resistance value can be realized.
  • this device 42 is achieved that flows through the capacitor 36, a lower current than through the smoothing capacitor 29, so that due to the different dimensions of the capacitors 29 on the one hand and 36 on the other hand substantially the same or approximately the same charging times of the two capacitors 29, 36 can be achieved ,
  • the electrical switch 13 (see FIG. 2) is opened so that an electric current flows through the current limiting capacitor 12.
  • Current limiting capacitor 12 throttles the current and thus reduces the amplitude of the primary DC voltage UP in standby mode.
  • the current limiting capacitor 12 is dimensioned such that the amplitude of the primary DC voltage UP in standby mode can reach a value from a value range of 16V to 20V. As already stated, however, the amplitude of the voltage UK is about 10V to 16V.
  • the current limiting capacitor 12 is thus dimensioned so that in standby mode just by the smoothing capacitor 29, an electric current can flow and thus this smoothing capacitor 29 can charge slowly.
  • Switching power supply 10 in standby mode delivered electrical power is less than a convertible from the power supply 10 power. This means that the
  • Charging the smoothing capacitor 29 lasts longer than its discharge due to the energy transfer to the secondary side of the transformer 32.
  • the smoothing capacitor 29 is thus charged slowly, then the transmission of the energy stored in the smoothing capacitor 29 to the secondary side, so that the Smoothing capacitor 29 is discharged, and then the smoothing capacitor 29 is recharged.
  • the two capacitors namely the smoothing capacitor 29 and the capacitor 36, are charged. If the amplitude of the primary DC voltage UP reaches a threshold value depending on the breakdown voltage of the zener diode 40 or if the amplitude of the voltage UK exceeds the breakdown voltage of the zener diode 40, the zener diode 40 is turned on so that the primary winding 33 is conductively connected to the reference potential 31. It flows through the primary winding 33, an electric current. The energy is now out of the
  • Breakdown voltage of the zener diode 40 Breakdown voltage of the zener diode 40.
  • the zener diode 40 is again turned on. Such a switching back and forth of the Zener diode 40 takes place until all the energy is transferred from the smoothing capacitor 29 to the secondary side and the smoothing capacitor 29 is thus discharged. Then the
  • FIG. 4 a shows a profile of the primary direct voltage UP over time t. 4b, however, shows a time profile of the voltage drop across the capacitor 36 UK.
  • Fig. 4c shows a time course of the secondary DC voltage US.
  • T1 the two capacitors 29, 36 are charged with electrical energy, so that the respective amplitudes of the
  • the capacitor 36 is alternately charged and discharged and the Zener diode 40 is alternately switched between the conductive and the off-state. As stated above, the capacitor 36 discharges particularly quickly and can be recharged quickly.
  • Time interval T3 thus drops an alternating voltage at the capacitor 36, so that an alternating current also flows through the primary winding 33, so that the energy from the smoothing capacitor 29 can be transmitted to the secondary side.
  • This switching back and forth of the zener diode 40 lasts until the smoothing capacitor 29 is discharged again or the amplitude of the primary direct voltage UP reaches a minimum W.
  • the capacitor 38 on the secondary side is already charged - this is charged during the time interval T3.
  • the capacitors 29 and 36 must be recharged, while the amplitude of the secondary DC voltage US slowly decreases.
  • the switching operations of the zener diode 40 are then repeated after a further time interval T4.
  • the current limiting capacitor 12 is thus dimensioned so small that the output to the switching power supply 10 electrical power is less than a power requirement of the switching power supply 10. If the household appliance is activated or the

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Rectifiers (AREA)
  • Dc-Dc Converters (AREA)

Abstract

L'invention concerne un appareil ménager comprenant une circuiterie électrique (1) qui peut être commutée entre un mode de fonctionnement et un mode de veille et qui comprend : une entrée de circuiterie (2) comprenant une première et une deuxième borne d'entrée (3, 4) entre lesquelles une tension alternative (UN) peut être appliquée; un filtre de réseau (5); un redresseur (9) pour redresser la tension alternative (UN); un condensateur de lissage (29) pour lisser la tension alternative (UN) redressée afin qu'une tension continue primaire (UP) soit présente au niveau du condensateur de lissage (29); un bloc d'alimentation à découpage (10) qui est couplé au condensateur de lissage (29) et prélève la tension continue primaire (UP) sur le condensateur de lissage (29) et produit à partir de la tension continue primaire (UP) prélevée une tension secondaire (US') avec laquelle un consommateur électrique (11, 14) de l'appareil ménager peut être alimenté. Le bloc d'alimentation à découpage (10) présente un transformateur (32) ayant un enroulement primaire (33) qui est couplé au condensateur de lissage (29) et un enroulement secondaire (34) sur lequel la tension secondaire (US') pour le consommateur électrique (11, 14) peut être prélevée. Le bloc d'alimentation à découpage (10) présente en outre un dispositif de commutation (35) connecté en série à l'enroulement primaire (33) pour commander un flux de courant à travers l'enroulement primaire (33). La circuiterie (1) présente des moyens (12) pour réduire l'amplitude de la tension continue primaire (UP) dans le mode de veille afin que l'amplitude de la tension continue primaire (UP) dans le mode de veille soit moindre que dans le mode de fonctionnement. Les moyens (12) pour réduire l'amplitude présentent un élément de limitation de courant (12) passif différent du filtre de réseau (5) et connecté en série au bloc d'alimentation à découpage (10) et qui est conçu pour limiter l'intensité d'un courant de charge passant par le condensateur de lissage (29). Un commutateur électrique (13) est connecté en parallèle à l'élément de limitation de courant (12) et sert à court-circuiter l'élément de limitation de courant (12) dans le mode de fonctionnement.
PCT/EP2012/066610 2011-08-31 2012-08-27 Appareil ménager comprenant une circuiterie électrique ayant un mode de veille et un mode de fonctionnement ainsi que procédé pour faire fonctionner une circuiterie d'un appareil ménager WO2013030156A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011081877A DE102011081877A1 (de) 2011-08-31 2011-08-31 Haushaltsgerät mit einer elektrischen Schaltungsanordnung mit einem Standby-Modus und einem Betriebsmodus sowie Verfahren zum Betreiben einer Schaltungsanordnung eines Haushaltsgeräts
DE102011081877.4 2011-08-31

Publications (2)

Publication Number Publication Date
WO2013030156A2 true WO2013030156A2 (fr) 2013-03-07
WO2013030156A3 WO2013030156A3 (fr) 2013-04-25

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DE (1) DE102011081877A1 (fr)
WO (1) WO2013030156A2 (fr)

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Publication number Priority date Publication date Assignee Title
EP0873651B1 (fr) 1996-01-12 1999-10-06 Siemens Aktiengesellschaft Alimentation a decoupage avec mode attente a faible dissipation de puissance

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EP1355410A1 (fr) * 1997-04-30 2003-10-22 Fidelix Y.K. Une alimentation à découpage
US7289340B2 (en) * 2004-10-13 2007-10-30 Shindengen Electric Manufacturing Co., Ltd. Switching power supply device
DE102005015724A1 (de) * 2005-03-31 2006-10-05 E.G.O. Elektro-Gerätebau GmbH Netzteil mit Transformator sowie elektrisches Gerät mit einem solchem Netzteil

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0873651B1 (fr) 1996-01-12 1999-10-06 Siemens Aktiengesellschaft Alimentation a decoupage avec mode attente a faible dissipation de puissance

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WO2013030156A3 (fr) 2013-04-25

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