WO2005017541A1 - Verfahren und schaltungsanordnung zur überwachung der funktionsweise eines oder mehrerer verbraucherstromkreise, insbesondere eines hausgeräts - Google Patents
Verfahren und schaltungsanordnung zur überwachung der funktionsweise eines oder mehrerer verbraucherstromkreise, insbesondere eines hausgeräts Download PDFInfo
- Publication number
- WO2005017541A1 WO2005017541A1 PCT/EP2004/007789 EP2004007789W WO2005017541A1 WO 2005017541 A1 WO2005017541 A1 WO 2005017541A1 EP 2004007789 W EP2004007789 W EP 2004007789W WO 2005017541 A1 WO2005017541 A1 WO 2005017541A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- measuring resistor
- waves
- voltage
- inverting input
- operational amplifier
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
- G01R31/2825—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere in household appliances or professional audio/video equipment
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
- G01R19/16547—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies voltage or current in AC supplies
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/2513—Arrangements for monitoring electric power systems, e.g. power lines or loads; Logging
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
- G01R31/42—AC power supplies
Definitions
- the invention relates to a method and a circuit arrangement for monitoring the functioning of one or more consumer circuits, in particular a domestic appliance, each of which contains a controllable semiconductor switch, in particular a triac, and an electrical consumer connected to the latter and which are fed by at least one AC voltage source. which provides an alternating voltage with positive and negative voltage half-waves.
- the invention is therefore based on the object of showing a way in which the functioning of one or more consumer circuits which are fed by at least one AC voltage source can be monitored in a relatively simple manner.
- the object outlined above is achieved according to the invention in a method of the type mentioned at the outset in that the currents flowing through all controllable semiconductor switches and electrical consumers are passed through a common low-resistance measuring resistor and in that the voltage drop occurring at this low-resistance measuring resistor with respect to the amplitudes of the positive ones and the negative voltage half-waves is evaluated separately.
- the present invention makes use of the use of a low-resistance measuring resistor, there is only one here only low-resistance measuring resistor is provided for all existing consumer circuits.
- the positive and negative voltage drops occurring in each case at the single low-resistance measuring resistor used, which are due to the current flows through all monitored consumer circuits.
- a circuit arrangement is preferably used to carry out the method according to the invention, which is characterized in that all electrical consumers together with their associated controllable semiconductor switches are connected to the at least one AC voltage source via a low-resistance measuring resistor and that the positive ones are connected to the low-resistance measuring resistor mentioned and the negative voltage half-waves of the said AC voltage are connected to a separately evaluating evaluation arrangement.
- the evaluation arrangement expediently has a first evaluation device which evaluates the positive voltage half-waves of the AC voltage in question and a first evaluation device which evaluates the negative voltage half-waves of the AC voltage in question. evaluating second evaluation device. This results in the advantage of an evaluation arrangement that is particularly simple to set up.
- each of the two evaluation devices is formed by an operational amplifier, which has its inverting input and its non-inverting input
- Input is connected to the two ends of the low-resistance measuring resistor.
- a first operational amplifier with its non-inverting input and a second operational amplifier with its inverting input are expediently connected to one end of the measuring resistor, and said first operational amplifier with its inverting input and said second operational amplifier with its inverting input connected to the other end of the measuring resistor.
- an evaluation circuit is connected to the outputs of the two operational amplifiers, which compares the output signals emitted by the two operational amplifiers in each case with defined threshold value voltages and which is dependent on the magnitude of the specified threshold value voltages being exceeded or undershot the output voltages emitted by the respective operational amplifiers in each case emits signal signals which are either correct
- the method and the circuit arrangement according to the invention are explained in more detail below with reference to a drawing.
- a circuit arrangement according to the present invention is shown.
- the circuit arrangement in question is used in the present case to monitor the functioning of two consumer circuits, which can be provided in particular in a household appliance, such as a washing machine, a dishwasher, a dryer, etc.
- two consumer circuits shown one comprises an electrical consumer R1 and the other comprises an electrical consumer R2.
- These electrical consumers R1, R2 can be electrical motors or heating resistors, for example.
- the two electrical consumers R1 and R2 shown are each connected in series with a controllable semiconductor switch T1 or T2, specifically with the load path of the respective semiconductor switch T1 or T2.
- controllable semiconductor switches in question are formed in the present case by triacs, the control electrodes of which are connected to control outputs (not specified) of a control circuit Ctr, which is fed by an AC voltage source Vac indicated in the drawing.
- triacs the controllable semiconductor switches
- other controllable semiconductor switches can also be used, such as thyristors, power transistors, such as so-called power MOSFETs, etc.
- All of the provided controllable semiconductor switches T1, T2 and the electrical consumers R1 and R2 connected to them are connected together via a low-resistance measuring resistor Rm to the AC voltage source Vac, which supplies an AC voltage with positive and negative voltage half-waves and which, for example, has the usual mains AC voltage of 230V , 50Hz can be.
- This evaluation arrangement Ed comprises two evaluation devices in the form of an operational amplifier Op1, Op2, respectively.
- the operational amplifier Op1 to be referred to as the first operational amplifier, is connected with its non-inverting input (+) to the common connection point of the triacs T1, T2 and the low-resistance measuring resistor Rm, and it is connected with its inverting input (-) via a resistor R5 to the other end of the measuring resistor Rm connected.
- the output of the first operational amplifier Op1 is also connected via a resistor R3 to this other end of the measuring resistor Rm, which may optionally be grounded or may be at ground potential.
- the relevant output of the first operational amplifier Op1 is also connected via a resistor R4 to its inverting input (-).
- the operational amplifier Op2 which can be referred to as the second operational amplifier and which may or may be of the same operational amplifier type as the first operational amplifier Op1, is with its inverting input (-) via a resistor R8 at the common connection point of the triacs T1, T2 and the low-impedance measuring resistor - Stand Rm connected.
- the non-inverting input (+) of the second operational amplifier Op2 is connected to the other end of the low-resistance measuring resistor Rm.
- the output of the second operational amplifier Op2 is connected on the one hand via a resistor R6 to the common connection point of the triacs T1, T2 and the low-resistance measuring resistor Rm, and on the other hand it is connected to its inverting input (-) via a resistor R7.
- the first operational amplifier Op1 operates as a non-inverting amplifier and the positive half-waves to the low-resistance measuring resistor Rm evaluates each falling voltage.
- the second operational amplifier Op2 works as an inverting amplifier. ker, which evaluates the negative half-waves of the voltage drop across the low-resistance measuring resistor Rm.
- Op1 is fed to an input 11 of an evaluation circuit Ec and, in the case of the second operational amplifier Op2, to an input 12 of the evaluation circuit Ec concerned.
- This evaluation circuit compares the relevant output signals with fixed threshold voltages and, depending on the size of the threshold voltages concerned exceeding or falling below, by means of the output signals emitted by the operational amplifiers Op1, Op2 in each case, outputs signals 01 and O2, which either emit one indicate proper current flow or a disturbed current flow through the respective consumer circuit, comprising in the present case, on the one hand, the electrical consumer R1 and the triac T1 in series with it and, on the other hand, the electrical consumer R2 and the triac T2 in series with its main load path.
- a signal indicating a faulty current flow which occurs at one of the outputs O1, 02, for example at a high level, indicates that there is a fault in at least one of the consumer circuits concerned.
- the aforementioned threshold voltages are determined in accordance with the total operation of all consumer circuits. A signal signal, which occurs, for example, at a low level, would then indicate that the detected consumer circuits are operating properly.
- the total consumer circuits present may be divided into groups each having a plurality of consumer circuits and for those belonging to such a consumer circuit group
- Consumer circuits are activated individually one after the other, and on the other hand, the associated consumer circuits are provided with individually associated threshold voltages in the evaluation circuit Ec.
- the signal signals determined in this way are then individually assigned to the relevant consumer circuits, as a result of which a rapid error limitation can be achieved.
- an excessively high current flow can be recognized and derived from this, for example in the event that an electrical consumer is formed by a circulation pump, and it can be derived from this that the circulation pump in question is blocked, whereupon the circuit of the relevant circulation pump can be switched off immediately.
- the controllable semiconductor switch located in the load circuit of this electrical consumer can be dimensioned less powerful and with a smaller cooling surface than in the case that such a shutdown cannot take place immediately due to a lack of appropriate monitoring.
- the monitoring of the functioning of the respective consumer circuits provided by the explained evaluation arrangement Ed can be represented, for example, by a plain text display or by a 7-segment display by means of corresponding display devices, which, in the event of malfunctioning of the consumer circuits concerned, simplifies and speeds up Can lead to fault finding.
- an indication can also be made that no error can be ascertained or that the consumer circuits are functioning properly.
- Such advertisements could also be a customer service by remote inquiry be made available so that diagnoses can be made in advance.
- the present invention enables simplified and faster fault finding in the event of faulty operation of one or more of the existing consumer circuits.
- continuous operation full-wave operation
- half-wave operation in the respective consumer circuit can be recognized in a simple manner by the present invention.
- the detection of permanent half-wave operation is particularly important when using pump motors as electrical consumers, since these pump motors are destroyed during constant half-wave operation.
- the present invention has been explained above in connection with the monitoring of the functioning of two consumer circuits.
- the invention is not limited to this; rather, it can be used to monitor the functioning of at least one consumer circuit, but also to monitor the functioning of more than two consumer circuits.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Multimedia (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Electric Motors In General (AREA)
- Ac-Ac Conversion (AREA)
- Control Of Voltage And Current In General (AREA)
- Measurement Of Current Or Voltage (AREA)
- Control Of Electrical Variables (AREA)
- Electronic Switches (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT04763214T ATE524745T1 (de) | 2003-08-08 | 2004-07-14 | Verfahren und schaltungsanordnung zur überwachung der funktionsweise eines oder mehrerer verbraucherstromkreise, insbesondere eines hausgeräts |
AU2004265730A AU2004265730B2 (en) | 2003-08-08 | 2004-07-14 | Method and circuit arrangement for monitoring the mode of operation of one or more load circuits, especially of a domestic appliance |
EP04763214A EP1654547B1 (de) | 2003-08-08 | 2004-07-14 | Verfahren und schaltungsanordnung zur überwachung der funktionsweise eines oder mehrerer verbraucherstromkreise, insbesondere eines hausgeräts |
US10/567,628 US7339414B2 (en) | 2003-08-08 | 2004-07-14 | Method and circuit arrangement for monitoring the mode of operation of one or more load circuits, especially of a domestic appliance |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10336604A DE10336604A1 (de) | 2003-08-08 | 2003-08-08 | Verfahren und Schaltungsanordnung zur Überwachung der Funktionsweise eines oder mehrerer Verbraucherstromkreise, insbesondere eines Hausgeräts |
DE10336604.0 | 2003-08-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005017541A1 true WO2005017541A1 (de) | 2005-02-24 |
Family
ID=34112072
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2004/007789 WO2005017541A1 (de) | 2003-08-08 | 2004-07-14 | Verfahren und schaltungsanordnung zur überwachung der funktionsweise eines oder mehrerer verbraucherstromkreise, insbesondere eines hausgeräts |
Country Status (7)
Country | Link |
---|---|
US (1) | US7339414B2 (de) |
EP (1) | EP1654547B1 (de) |
AT (1) | ATE524745T1 (de) |
AU (1) | AU2004265730B2 (de) |
DE (1) | DE10336604A1 (de) |
ES (1) | ES2369271T3 (de) |
WO (1) | WO2005017541A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010002877B4 (de) * | 2010-03-15 | 2017-11-23 | BSH Hausgeräte GmbH | Verfahren zum Betreiben eines Haushaltsgeräts und Haushaltsgerät |
DE102014205161A1 (de) * | 2014-03-19 | 2015-09-24 | BSH Hausgeräte GmbH | Haushaltsgerät, insbesondere Kaffeevollautomat, mit Überlast- und Überstromschutzschaltung |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2150888A1 (de) * | 1971-10-13 | 1973-04-19 | Elan Schaltelement Kurt Maecke | Modulator in traegerfrequenz-messverstaerkern |
US4109308A (en) * | 1976-06-16 | 1978-08-22 | Bodenseewerk Perkin-Elmer & Co., Gmbh | Circuit for converting a.c. voltage into a d.c. voltage |
SU840747A1 (ru) * | 1978-03-13 | 1981-06-23 | Новосибирский Электротехническийинститут | Датчик тока нагрузки импульсногопРЕОбРАзОВАТЕл ,ВыпОлНЕННОгО пО MOC-ТОВОй CXEME |
US4464661A (en) * | 1982-02-18 | 1984-08-07 | The Ltv Aerospace And Defense Company | System monitor circuit having first and second phase-sensitive demodulator circuits coupled to first and second loads, and a comparator section for monitoring the loads |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3740482A1 (de) * | 1987-11-28 | 1989-06-08 | Bosch Gmbh Robert | Schaltungsanordnung zum ueberwachen von mehreren parallelen geschalteten leistungsausgaengen |
DE4227827A1 (de) * | 1992-08-21 | 1994-02-24 | Huber Signalbau Ag | Lichtsignalanlage |
US5300917A (en) * | 1993-01-15 | 1994-04-05 | Maue H Winston | Junction box having integrally formed shunt |
DE4341425B4 (de) * | 1993-12-04 | 2004-05-06 | Robert Bosch Gmbh | Verfahren zum Bestimmen des durch eine Last in einem Kfz fließenden Stroms |
US5945802A (en) * | 1996-09-27 | 1999-08-31 | General Electric Company | Ground fault detection and protection method for a variable speed ac electric motor |
JP3517617B2 (ja) * | 1999-09-17 | 2004-04-12 | 株式会社東芝 | 電気機器の漏電検知方法 |
-
2003
- 2003-08-08 DE DE10336604A patent/DE10336604A1/de not_active Withdrawn
-
2004
- 2004-07-14 EP EP04763214A patent/EP1654547B1/de not_active Not-in-force
- 2004-07-14 US US10/567,628 patent/US7339414B2/en not_active Expired - Fee Related
- 2004-07-14 WO PCT/EP2004/007789 patent/WO2005017541A1/de active Application Filing
- 2004-07-14 ES ES04763214T patent/ES2369271T3/es active Active
- 2004-07-14 AU AU2004265730A patent/AU2004265730B2/en not_active Expired - Fee Related
- 2004-07-14 AT AT04763214T patent/ATE524745T1/de active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2150888A1 (de) * | 1971-10-13 | 1973-04-19 | Elan Schaltelement Kurt Maecke | Modulator in traegerfrequenz-messverstaerkern |
US4109308A (en) * | 1976-06-16 | 1978-08-22 | Bodenseewerk Perkin-Elmer & Co., Gmbh | Circuit for converting a.c. voltage into a d.c. voltage |
SU840747A1 (ru) * | 1978-03-13 | 1981-06-23 | Новосибирский Электротехническийинститут | Датчик тока нагрузки импульсногопРЕОбРАзОВАТЕл ,ВыпОлНЕННОгО пО MOC-ТОВОй CXEME |
US4464661A (en) * | 1982-02-18 | 1984-08-07 | The Ltv Aerospace And Defense Company | System monitor circuit having first and second phase-sensitive demodulator circuits coupled to first and second loads, and a comparator section for monitoring the loads |
Non-Patent Citations (1)
Title |
---|
DATABASE WPI Section EI Week 198213, Derwent World Patents Index; Class S01, AN 1982-D6610E, XP002306120 * |
Also Published As
Publication number | Publication date |
---|---|
AU2004265730B2 (en) | 2007-09-20 |
AU2004265730A1 (en) | 2005-02-24 |
EP1654547B1 (de) | 2011-09-14 |
ES2369271T3 (es) | 2011-11-29 |
DE10336604A1 (de) | 2005-03-03 |
ATE524745T1 (de) | 2011-09-15 |
US20060181261A1 (en) | 2006-08-17 |
EP1654547A1 (de) | 2006-05-10 |
US7339414B2 (en) | 2008-03-04 |
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