EP2548407A1 - Dispositif de table de cuisson - Google Patents
Dispositif de table de cuissonInfo
- Publication number
- EP2548407A1 EP2548407A1 EP11703704A EP11703704A EP2548407A1 EP 2548407 A1 EP2548407 A1 EP 2548407A1 EP 11703704 A EP11703704 A EP 11703704A EP 11703704 A EP11703704 A EP 11703704A EP 2548407 A1 EP2548407 A1 EP 2548407A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- switching
- period
- switching element
- heating
- control device
- 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.)
- Granted
Links
- 238000010438 heat treatment Methods 0.000 claims abstract description 85
- 238000000034 method Methods 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims abstract description 12
- 230000008859 change Effects 0.000 claims description 19
- 230000000903 blocking effect Effects 0.000 claims description 11
- 230000002457 bidirectional effect Effects 0.000 claims description 3
- 230000000737 periodic effect Effects 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 15
- 239000003990 capacitor Substances 0.000 description 7
- 238000010411 cooking Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 2
- YVRQEGLKRIHRCH-UHFFFAOYSA-N [1,4]benzothiazino[2,3-b]phenothiazine Chemical compound S1C2=CC=CC=C2N=C2C1=CC1=NC3=CC=CC=C3SC1=C2 YVRQEGLKRIHRCH-UHFFFAOYSA-N 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/06—Control, e.g. of temperature, of power
- H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
Definitions
- the invention is based on a hob device according to the preamble of claim 1.
- a cooktop device which comprises a control unit and a switching element which has a first and a second switching element.
- the control unit periodically switches the first and second switching elements. Further, in an operation, the control unit changes a period related time interval existing between a passage time period of the first switching element and a passage time period of the second switching element, which is within one switching period of at least one of the switching elements, to change a heating power of a heating element.
- a cooktop device in which a coil is operated alternately at different frequencies during an operating procedure.
- the object of the invention is in particular to provide a generic device with improved properties in terms of high efficiency.
- the object is achieved by the features of claim 1, while advantageous embodiments and modifications of the invention can be taken from the dependent claims.
- the invention is based on a cooktop device with at least one control device, which is provided, in at least one operating operation, at least one period-related time interval between a passage time period of a first switching element and a passage time period of a second switching element which within a switching period at least one of the switching elements is to change to change a heating power of at least one heating element. It is proposed that the cooktop device has at least one electronic component designed as a switching protective element, which is provided to protect at least one of the switching elements.
- a "control device” should be understood in particular to mean a device which has at least one electronic component which is intended to control a process, the device preferably having a computer unit and / or a memory unit and / or a stored operating program.
- a switching element is to be understood to mean, in particular, an element which has a first and at least one second electrical contact, wherein the element is intended to establish and interrupt an electrically conductive connection between the first and the second electrical contact
- the element is particularly preferably designed as a bipolar transistor with insulated gate electrode.
- a "passage period" of a switching element should be understood in particular a period of time during which a first and a second main contact of the switching element are electrically connected.
- a “main contact” of a switching element is to be understood as meaning, in particular, a contact of the switching element which is provided for conducting a current to a consumer unit which is formed separately from the switching element a frequency with which the switching element is switched to be understood.
- a “time interval” between a first transmission time period and a second transmission time period should, in particular, be understood to be a duration of a time period which begins with an end of the transmission time periods which expires earlier and ends with an initiation of those of the transmission time periods which commence later
- a "period-related" time interval is to be understood as meaning, in particular, a duration of the time interval in seconds divided by a duration of the switching period duration in seconds.
- a "switching protection element which is intended to protect at least one of the switching elements” is to be understood as meaning, in particular, an electronic component which, in a state in which two main contacts of one of the switching elements are connected by an electrically conductive connection, is connected parallel to the conductive connection, wherein the electronic component conducts electrical current better in at least one operating state in a flow direction than in an opposite direction of the flow direction and wherein the electronic component is particularly preferred electric current only in one direction.
- a high efficiency can be achieved.
- a gentle operation of the switching element and in particular a high lifetime of the switching element can be achieved.
- a small energy loss can be achieved when switching the switching element.
- the switching protective element is designed as a diode and / or at least as part of a bidirectional transistor. This allows a structurally simple design can be achieved.
- the control device is provided to change at least one further period-related time interval between the passage time period of the second switching element and a passage time period of the first switching element, which exists within the switching period, to change the heating power of the heating element.
- This allows a high degree of flexibility and in particular a flexible change in the heating power can be achieved.
- it can be achieved that, with a constant switching cycle duration, a large interval of heating powers of the heating element, with which the heating element can be operated, is available.
- two switching elements, which are provided for influencing different heating elements are operated with the same switching period lengths, but with greatly different heating powers of the heating elements.
- the control device is provided to switch at least one of the switching elements in a blocking state, while the relevant switching element is de-energized.
- a "blocking state" of a switching element is to be understood as meaning, in particular, a state of the switching element in which a conduction of electric current between two main contacts of the switching element is prevented by the switching element a current flowing between two main contacts of the switching element current has zero amperes.
- the control device is preferably provided to switch the first switching element at least once while the heating element is de-energized, and to switch the second switching element to passage at least once while the heating element is conducting current.
- the control device is provided for switching the first and the second switching element during at least the operating process such that a period-related passage time of the first switching element differs from a period-related passage time of the second switching element and / or a period-related blocking time of the first switching element differs from a period-related blocking time of the second switching element, and to switch at least one of the switching elements at least once while the heating element is de-energized.
- control device is provided to switch the first and the second switching element at least once in a blocking state during the operating process, while the heating element carries current. In this way, a high degree of flexibility can be achieved.
- the control device is provided to change at least one period-related passage time of at least one switching element for changing the heating power of the heating element in the operating process.
- the cooktop device has a third and at least a fourth switching element, which are provided for adjusting a power supply of at least one further heating element, and at least one further control device which is provided to switch the third and fourth switching element in the operating process such that during the operating process always at least one of the two switching elements is switched to passage.
- a method is proposed in which at least one period-related time interval existing between a passage time period of a first switching element and a passage time period of a second switching element, which is within a switching period of at least one of the switching elements, is changed to change a heating power of a heating element at least one of the switching elements is protected in at least one operating operation by at least one electronic component designed as a switching protective element.
- Fig. 1 is a plan view of a cooking hob with an inventive
- 3 is an illustration of a first mode of operation of the circuit; 4 shows a second circuit of the cooktop device, which is identical to the first circuit,
- FIGS. 5 to 13 show illustrations of further operating modes of the first circuit
- FIG. 14 is a graph showing power curves versus frequency for the modes of operation.
- Fig. 15 shows an alternative embodiment of the first circuit.
- FIG. 1 shows a cooktop with a cooktop device according to the invention.
- the cooktop device has a heating element L designed as a coil, which is part of an electric circuit 48 (FIG. 2) of the cooktop device.
- the hob assembly further circuits, which are identical to the circuit 48 and each having a heating element, these heating elements together with the heating element L form a heater 52, which is used to heat cookware (not shown), which on a cooking surface 50 of the hob device is turned off, is provided.
- the heating elements L With such heating of the cookware, the heating elements L generate time-varying magnetic fields which generate eddy currents in the cookware which heat the cookware.
- the circuit 48 comprises a voltage source U, switching elements 14, 18 formed as a bipolar transistor with insulated gate electrode 14 ', 18', a control device 10, a switching protection element 26 formed as a diode 26 ', another switching protection element formed as a diode 56 , a resistor R and a capacitor C on.
- the term "IGBT" is used for the term insulated gate bipolar transistor A plus pole of the voltage source U is conductively connected to a collector Ki of the IGBT 14 'Another pole of the voltage source is conducting with an emitter E 2
- an emitter Ei of the IGBT 14 ' is conductively connected to a collector K 2 of the IGBT 18'
- the emitter Ei and the collector Ki are main contacts of the IGBT 18 '
- the control device 10 has a first and a second control unit 58, 60.
- the first control unit 58 applies a voltage Vi between a gate G-1 of the first IGBT 14 'and the emitter Ei ( Figures 2 and 3).
- the gate G-1 is not a main contact of the IGBT 14 'and serves to determine a switching behavior of the IGBT 14'.
- the second control unit 60 applies a voltage V 2 between a gate G 2 of the second IGBTs 18 'and emitter E 2 .
- the Resistor formed as a coil heating element L and the capacitor C are connected in series.
- a first contact of the resistor R is conductively connected to the emitter Ei.
- a second contact of the resistor R is conductively connected to a first contact of the heating element L.
- a second contact of the heating element L is conductively connected to a first contact of the capacitor C.
- a second contact of the capacitor C is conductively connected to the emitter E 2 .
- a first contact of the diode 26 ' is connected to the collector Ki.
- a second contact of the diode 26 ' is conductively connected to the emitter Ei.
- the diode 26' blocks.
- a first contact of the diode 56 is conductively connected to the collector K 2 .
- a second contact of the diode 56 is conductively connected to the emitter E 2 .
- the switching protection element 26 formed as the diode 26 ' protects the switching element 14 by flowing a current through the diode 26', thereby dissipating a potential difference between the collector Ki and the emitter Ei, and switching the switching element 14 while the current flows, so that is gentle for the switching element 14.
- the control units 58, 60 switch the IGBTs 14 '18' at a frequency to an oscillating circuit formed by the resistor R, the heating element L formed by a coil, in the operation in which the circuit 48 operates in a first mode of operation and the capacitor C is formed to excite vibrations. This is done by applying the voltages Vi and V 2 ( Figures 2 and 3). In Fig. 3, an abscissa 62 is a time axis.
- a passage time T 2 of the IGBT 18 ' ie a period in which K 2 and E 2 are conductively connected
- a passage time Ti of the IGBT 14' ie a period in which Ei and Ki are conductively connected
- a period-related time interval d- ⁇ which in time within a switching period T of the IGBTs 14 ', which is identical to a switching period of the IGBT 18', is.
- the control units 58, 60 change in the operating process in which a cookware is heated, the period-related time interval d- ⁇ such that the change of the period-related time interval d- ⁇ causes a change in output from the heating element L heating power.
- a passage time T 3 of the IGBT 18 'and the passage time Ti is a dead time (not shown) of the IGBTs 14' 18 ', which is very small compared to the switching period T. Furthermore, the IGBTs 14 ', 18' are in the time interval which exists between the transmission Time periods Ti, T 2 is in a blocking state. During the on-time Ti, the IGBT 18 'blocks, while the pass-times T 2 and T 3 disable the IGBT 14'.
- FIG. 3 also shows a time profile of an output voltage V 0 (see FIG. 2) of the resonant circuit and a time profile of a current i L flowing through the heating element L (see FIG.
- the abscissa 62 indicates a zero value of the current i L or the voltage V 0 .
- the controller 10 Upon completion of the passage period Ti, the controller 10 turns the IGBT 14 'into the off state while the heater L is supplying power. Upon completion of the on-time period T 2 , the controller 10 turns the IGBT 18 'into the off-state while the heater L supplies power. Further, at a start of the passage period Ti, the control device turns on the IGBT 14 'in the on state while the heating element L is de-energized. Further, the control device 10 turns on the IGBT 18 'at a start of the on-time period T 3 while the heater L conducts power, and the switching protection element 26 protects the switching element 14.
- the passage time Ti divided by the cycle period T gives a period-related transmission time D-
- the transmission period T 2 divided by the switching period T yields a period-related transmission time D 2 .
- the control device 10 is further provided to change the passage time Di and / or the passage time D 2 and / or the switching period T and thereby to achieve a change in the heating power of the heating element L.
- the switching element 14 and the switching protection element 26 may also be integrally formed as a bidirectional transistor.
- a circuit 64 of the further circuits of the cooktop device has a third and a fourth switching element 40, 42, which serve to adjust a power supply of a heating element 44 of the circuit 64. Furthermore, the circuit 64 has a control device 46 which, in the operating mode in the operating mode, switches the third and fourth switching elements 40, 42, so that during the operation process gangs always one of the two switching elements 40, 42 is switched to Mandarinskyse. In this case, the control device 46 switches each of the switching elements 40, 42 periodically with the switching period T, wherein each of the two switching elements 40, 42 is switched to fürläse at least once during the switching period T.
- FIGS. 5 to 15 show alternative embodiments, among others operating modes. Substantially identical components, features and functions are basically numbered by the same reference numerals. To distinguish the embodiments, however, the reference numerals of the embodiments in Figures 5 to 15, the letters "a", "b", etc. added. The following description is limited essentially to the differences from the exemplary embodiment in FIGS. 1 to 4, wherein reference can be made to the description of the exemplary embodiment in FIGS. 1 to 4 with regard to components, features and functions remaining the same.
- FIG. 5 illustrates an alternate second mode of operation of the circuit 48.
- the second mode of operation differs from the first mode of operation in that a period related interval d 2 a begins with one end of a transmission period T-ia of the first IGBG 14 ' Beginning of a passage time T 3 a of the second IGBT 18 'ends, is changed to a change in the heating power of the heating element L from the control unit 10, wherein a second period-related time interval between the passage time T ⁇ a and a passage time T 2 a corresponds to a dead time of one of the IGBTs 14 ', 18'.
- FIG. 6 illustrates an alternative third mode of operation of the circuit 48, which differs from the first mode of operation illustrated in FIG. 3 in that one of the IGBTs 14 ', 18' at the end of one of the transmission periods ⁇ , T 2 b from the control device 10 in FIG a blocking state is switched while it is de-energized.
- FIG. 7 illustrates an alternative fourth mode of operation of the circuit 48.
- the fourth mode of operation differs from the third mode of operation only in that a period related interval d 2 c commencing with one end of a transmission period T - C of the first IGBG 14 ' with a start of a passage time period T 3 c of the second IGBT 18 'ends, to a change in the heating power of Heating element L is changed by the control unit 10, wherein a second period-related time interval between the passage period T-
- FIG. 8 illustrates an alternate fifth mode of operation of the circuit 48.
- the fifth mode of operation differs from the first mode of operation in that both a period related interval d 2 d commences with an end of a transmission period of the first IGBG 14 'and a beginning of a period Passing time period T 3 d of the second IGBT 18 'ends, as well as a period-related time interval d-id between the passage time T-
- the controller 10 Upon termination of the on-time period T-
- the controller 10 Upon completion of the on-time period T 2 d, the controller 10 turns the IGBT 18 'into the off state while the heater L is supplying power. Further, at a start of the passage period T-
- d d 2 d and a period-related transmission time D-
- d is equal to a period-related transmission time D 2 d. Furthermore, due to the periodic switching: T 3 d T 2 d.
- FIG. 9 shows another typical illustration of the fifth operating mode, wherein FIG. 9 corresponds to a different cooking process than FIG. 8.
- FIGS. 10 and 11 illustrate two different situations of a sixth operating mode of the circuit 48, which differs from the fifth operating mode only in that d-ie + D-ie is not equal to 0.5.
- FIGS. 12 and 13 illustrate two different situations of a seventh mode of operation of the circuit 48.
- the seventh mode of operation differs from the first mode of operation in that both a period related time interval d 2 f which ends with an end of a transmission period Tif of the first IGBG 14 '. begins and ends with a start of a passage time period T 3 f of the second IGBT 18 ', as well as a period-related time interval d-
- the control device 10 switches one of the IGBTs 14 ', 18' to the off state while the heating element L is conducting current.
- the control device 10 switches one of the IGBTs 14 ', 18' into the blocking state, while the relevant IGBT 14 ', 18' is de-energized.
- the controller turns on the IGBT 14 'to the on-state while the heating element L is de-energized.
- the controller 10 turns on the IGBT 18 'at a start of the on-time period T 3 f while the heating element L is de-energized.
- FIG. 14 shows a diagram in which an output power of the heating element L in watts is plotted on an ordinate 66, and a frequency in kilohertz, with which both IGBTs 14 ', 18' switch, is shown on an abscissa 68.
- Curves SW, ADC, TPDT1, TPDT2, TPDT3, OPDT1 and OPDT2 shown in FIG. 14 apply under the conditions that the heating element L has an inductance of 20 micro-Henry, the capacitor has a capacitance of 1400 nF and that a so-called factor
- the resistor R shown in Figure 2 also includes a resistor which is given by the heating of a cookware.
- the curves ADC, TPDT1, TPDT2, TPDT3, OPDT1 and OPDT2 are all closed.
- the switching period T the passage times Di, D 2 and the time interval d-1 are changed and in the fourth operating mode the switching period T, the passage times Di, D 2 and the time interval d 2 are changed, then all the output power Frequency pairs, which are given by the edges bordered by the curve OPDT2 points adjustable.
- the switching period T when the switching period T, the passage times D 1; D 2 and the time intervals d- 1 and d 2 are changed, then all output power frequency pairs, which are given by the bordered by the curve TPDT1 points adjustable.
- the switching period T, the let-through times Di, D 2 and the time intervals d- 1 and d 2 are changed, then all the output power-frequency pairs which are given by the points bordered by the curve TPDT 2 are adjustable. If, in the seventh operating mode, the switching period T, the passage times Di, D 2 and the time intervals d- 1 and d 2 are changed, then all the output power frequency pairs which are given by the points bordered by the curve TPDT3 are adjustable.
- the curve ADC is a curve for an ADC operating mode in which the IGBTs 14 ', 18' are periodically switched at the same frequency, wherein during one period at a time always one of the IGBTs 14 ', 18' shuts off - tet is.
- the switching elements 14, 18, 40, 42 connected at the same frequency, so that a quiet operation is achieved.
- a very different output power of the two heating elements L and 44 can be achieved in that the circuits 48, 64 are operated in different operating modes.
- the circuit 48 is operated in the ADC operating mode or the SW operating mode and at the same time the circuit 64 is operated in the first, second, fifth or sixth operating mode, wherein the switching elements 14, 18, 40, 42, for example, with a frequency of 35 KHz operate.
- Operating modes one through seven allow operation of circuit 48 at low output power, where optimum heating of cookware, uniform loading of the power grid, and low emission of electromagnetic radiation can be achieved. In particular, it can be avoided to supply current in pulses in order to achieve a low output power.
- a fundamental frequency of a current i L flowing through the heating element L formed as a coil is different from the switching frequency of the IGBTs 14 ', 18' in the third, fourth and seventh modes of operation.
- the resistance R increases with increasing fundamental frequency, so that in these operating modes, the resistance R is high, which is advantageous for a cookware with low resistance.
- FIG. 15 shows an alternative embodiment of a circuit 48g, which has two further controllable IGBTs 70g, 72g besides two IGBTs 14'g, 18'g.
- the above-described operation modes can also be applied to the circuit 48g by controlling the IGBTs 14'g, 72g as the IGBT 14 'and the IGBTs 18'g and 70g like the IGBT 18'.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Cookers (AREA)
- Induction Heating Cooking Devices (AREA)
Abstract
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES201030379A ES2385807B1 (es) | 2010-03-16 | 2010-03-16 | Dispositivo de encimera de cocción. |
PCT/EP2011/052347 WO2011113660A1 (fr) | 2010-03-16 | 2011-02-17 | Dispositif de table de cuisson |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2548407A1 true EP2548407A1 (fr) | 2013-01-23 |
EP2548407B1 EP2548407B1 (fr) | 2014-04-09 |
Family
ID=43903143
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11703704.4A Active EP2548407B1 (fr) | 2010-03-16 | 2011-02-17 | Dispositif de table de cuisson |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2548407B1 (fr) |
ES (1) | ES2385807B1 (fr) |
WO (1) | WO2011113660A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012215257B4 (de) * | 2012-08-28 | 2022-10-06 | Vitesco Technologies GmbH | Schaltungsanordnung zum induktiven Heizen zumindest eines Kraftstoffeinspritzventils sowie Kraftstoffeinspritzventilanordnung mit einer solchen Schaltungsanordnung und Verfahren zum Betreiben einer Schaltungsanordnung und einer Kraftstoffeinspritzventilanordnung |
EP4042834A1 (fr) | 2019-10-08 | 2022-08-17 | BSH Hausgeräte GmbH | Appareil de cuisson |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4885447A (en) * | 1985-01-23 | 1989-12-05 | Balay, S.A. | System for the induction heating of the electric plates of a cooker |
DE19654269C2 (de) * | 1995-12-27 | 2000-02-17 | Lg Electronics Inc | Induktionskochgerät |
CH690891A5 (de) * | 1996-03-07 | 2001-02-15 | Thomann Electronics Ag | Heizleistungsregulierung für Induktionskochherd. |
ES2128958B1 (es) * | 1996-11-21 | 2000-01-16 | Balay Sa | Procedimiento de control de potencia en cocinas de induccion alimentadas mediante inversores multipuente reconfigurables. |
ES2143430B1 (es) * | 1998-09-08 | 2000-12-16 | Balay Sa | Circuito inversor de dos salidas, y circuito y procedimiento de control de la potencia entregada en las salidas del inversor. |
FR2839605B1 (fr) * | 2002-05-07 | 2004-09-10 | Elka | Module de cuisson electrique a induction et procede de commande du module |
FR2839604A1 (fr) * | 2002-05-07 | 2003-11-14 | Jaeger Controls | Module de cuisson electrique a induction et procede de commande du module |
GB2410874B (en) | 2004-02-06 | 2007-01-31 | Agilent Technologies Inc | Broadband system models |
-
2010
- 2010-03-16 ES ES201030379A patent/ES2385807B1/es not_active Revoked
-
2011
- 2011-02-17 WO PCT/EP2011/052347 patent/WO2011113660A1/fr active Application Filing
- 2011-02-17 EP EP11703704.4A patent/EP2548407B1/fr active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2011113660A1 * |
Also Published As
Publication number | Publication date |
---|---|
ES2385807A1 (es) | 2012-08-01 |
ES2385807B1 (es) | 2013-06-17 |
EP2548407B1 (fr) | 2014-04-09 |
WO2011113660A1 (fr) | 2011-09-22 |
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