CN118283862A - Control method and device of electromagnetic heating circuit and electromagnetic heating circuit - Google Patents
Control method and device of electromagnetic heating circuit and electromagnetic heating circuit Download PDFInfo
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- CN118283862A CN118283862A CN202211718278.3A CN202211718278A CN118283862A CN 118283862 A CN118283862 A CN 118283862A CN 202211718278 A CN202211718278 A CN 202211718278A CN 118283862 A CN118283862 A CN 118283862A
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C7/00—Stoves or ranges heated by electric energy
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C7/00—Stoves or ranges heated by electric energy
- F24C7/08—Arrangement or mounting of control or safety devices
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- 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
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- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
- General Induction Heating (AREA)
- Induction Heating Cooking Devices (AREA)
Abstract
The application discloses a control method and device of an electromagnetic heating circuit and the electromagnetic heating circuit. The electromagnetic heating circuit comprises a power supply module, a resonance module, a driving module and a control module. The resonance module is connected to the power supply module and comprises a heating coil, a first resonance capacitor, N second resonance capacitors, a first switch and N second switches; the first resonant capacitor and the N second resonant capacitors are respectively connected with the heating coil in parallel, and the N second switches are connected into branches where the N second resonant capacitors are located in a one-to-one correspondence manner; the driving module is connected to the control end of the first switch; the control module is connected to the driving module and the N second switches. Because the control module can control whether N second resonance capacitors are connected into the resonance module or not by controlling the switching states of N second switches, the more the connected second resonance capacitors are, the larger the equivalent capacitance value of the resonance capacitors is, the LC resonance parameters of the electromagnetic heating circuit are enlarged, and the heating power is further improved.
Description
Technical Field
The present application relates to the field of electromagnetic heating technologies, and in particular, to a control method and apparatus for an electromagnetic heating circuit, and an electromagnetic heating circuit.
Background
An electromagnetic oven is a cooking utensil made by utilizing the electromagnetic induction heating principle. When the induction cooker is in a working state, the heating coil in the induction cooker is in a charging state by leading the insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, IGBT). After the heating coil is charged, the IGBT is turned off, so that the heating coil charges a resonance capacitor connected in parallel with the heating coil. At this time, the heating coil and the resonance capacitor are in a high-frequency resonance state, and the high-frequency alternating current on the heating coil can form an alternating magnetic field, so that the heating coil is contacted with the electromagnetic oven to generate an eddy current effect at the bottom of the metal cooker, and finally, the food in the cooker is heated.
However, the existing induction cookers often adopt fixed LC resonance parameters, so that the heating power of the induction cookers in operation is in a fixed power interval.
Disclosure of Invention
The embodiment of the application provides a control method and device of an electromagnetic heating circuit and the electromagnetic heating circuit.
In a first aspect, some embodiments of the present application provide an electromagnetic heating circuit that includes a power module, a resonant module, a drive module, and a control module. The resonance module is connected to the power module and comprises a heating coil, a first resonance capacitor, N second resonance capacitors, a first switch and N second switches, wherein N is greater than or equal to 1. The heating coil, the first switch and the power supply module are sequentially connected in series to form a current loop; the first resonant capacitor and the N second resonant capacitors are respectively connected with the heating coil in parallel, and the N second switches are connected into branches where the N second resonant capacitors are located in a one-to-one correspondence mode. The driving module is connected to the control end of the first switch. The control module is connected with the driving module; the control module is configured to: and controlling the heating power of the electromagnetic heating circuit by controlling the switching states of the N second switches.
In a second aspect, some embodiments of the present application further provide an electrical apparatus, where the electrical apparatus includes a housing and the electromagnetic heating circuit described above.
In a third aspect, some embodiments of the present application further provide a control method of an electromagnetic heating circuit, which is applied to the electromagnetic heating circuit, where the method includes: acquiring expected heating power of an electromagnetic heating circuit; determining a target switch state of the second switch based on the desired heating power; based on the target switch state, the actual heating power of the electromagnetic heating circuit is controlled so that the actual heating power approaches the desired heating power.
In a fourth aspect, some embodiments of the present application further provide a control device for an electromagnetic heating circuit, where the control device is applied to the electromagnetic heating circuit, and the control device includes an acquisition module, a determination module, and a control module. The acquisition module is used for acquiring expected heating power of the electromagnetic heating circuit; the determining module is used for determining a target switch state of the second switch based on the expected heating power; the control module is used for controlling the actual heating power of the electromagnetic heating circuit based on the target switch state so that the actual heating power approaches the expected heating power.
In a fifth aspect, some embodiments of the present application also provide an electromagnetic heating circuit comprising one or more processors, a memory, one or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the one or more processors and configured to perform the control method described above.
In some embodiments, the electromagnetic heating circuit includes a control module that includes one or more processors and memory.
In a sixth aspect, embodiments of the present application also provide a computer-readable storage medium having computer program instructions stored therein. Wherein the computer program instructions are executable by the processor to perform the control method as described above.
In a seventh aspect, embodiments of the present application also provide a computer program product that, when executed, implements the above-described method.
The application provides a control method and device of an electromagnetic heating circuit and the electromagnetic heating circuit. The electromagnetic heating circuit comprises a power supply module, a resonance module, a driving module and a control module, wherein the resonance module comprises a first resonance capacitor and N second resonance capacitors which are connected in parallel at two ends of a heating coil, and the control module can control whether the N second resonance capacitors are connected into the resonance module or not by controlling the switching states of the N second switches. The equivalent capacitance value of the resonance capacitor is increased under the condition that the second resonance capacitor is more connected with the resonance module, namely, the LC resonance parameter of the electromagnetic heating circuit is enlarged, so that the heating power of the electromagnetic oven provided with the electromagnetic heating circuit is improved, namely, the heating power interval of the electromagnetic oven is widened.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an electrical device according to an embodiment of the present application.
Fig. 2 is a schematic diagram of a structure of the electromagnetic heating circuit in fig. 1.
Fig. 3 is a schematic diagram of another structure of the electromagnetic heating circuit in fig. 1.
Fig. 4 is a flowchart of a control method of an electromagnetic heating circuit according to a first embodiment of the present application.
Fig. 5 is a flow chart of a control method of an electromagnetic heating circuit according to a second embodiment of the present application.
Fig. 6 is a schematic waveform diagram of a driving voltage according to an embodiment of the present application.
Fig. 7 is a block diagram of a control device of an electromagnetic heating circuit according to an embodiment of the present application.
Fig. 8 is a block diagram of an electromagnetic heating circuit according to an embodiment of the present application.
Fig. 9 is a block diagram of a computer-readable storage medium according to an embodiment of the present application.
Detailed Description
In order to enable those skilled in the art to better understand the solution of the present application, the following description will make clear and complete descriptions of the technical solution of the present application in the embodiments of the present application with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The electromagnetic heating circuit, the electrical equipment and the control method applied to the electromagnetic heating circuit according to the application are further described below with reference to the detailed description and the accompanying drawings.
Referring to fig. 1, an embodiment of the application provides an electromagnetic heating circuit 100 and an electrical apparatus 200 configured with the electromagnetic heating circuit 100. The electric device 200 may be a working device (e.g., an induction cooker, an induction multi-burner, an induction heating rice cooker, etc.) based on an electromagnetic heating principle.
In the embodiment of the present application, the electrical apparatus 200 includes the housing 210, the functional panel 230, and the electromagnetic heating circuit 100 described above. The functional panel 230 is disposed on an outer surface of the housing 210, and is configured to receive a control operation of a user, and the electromagnetic heating circuit 100 is disposed inside the housing 210 and electrically connected to the functional panel 230, so as to adjust an operating parameter of the electromagnetic heating circuit 100 according to different control operations received by the functional panel 230.
In the present embodiment, the housing 210 includes a first housing 212 and a second housing 214, and the first housing 212 and the second housing 214 are covered with each other to form an accommodating space for the electromagnetic heating circuit 100, that is, the housing 210 plays a role in protecting and accommodating the components in the electromagnetic heating circuit 100. Wherein, a fixing structure is disposed in the first housing 212, and the fixing structure is used for fixing a part of the structure (for example, a circuit motherboard) of the electromagnetic heating circuit 100. Specifically, the securing structure includes, but is not limited to, a securing slot, a clip (e.g., a resilient clip), and the like. The outer surface of the second housing 120 is provided with a mounting groove for mounting the functional panel 230.
The function panel 230 is mounted to the outer surface of the second housing 120, and in particular, the function panel 230 may include a plurality of function switches, for example, a power start switch, a heating function start switch, a heating power change-over switch, and the like. When the function panel 230 receives a control operation of a user, the control operation is converted into a corresponding electrical signal, and the electrical signal is transmitted to the electromagnetic heating circuit 100, and the electromagnetic heating circuit 100 determines a corresponding operation mode based on the electrical signal. For example, if the selection switch of the high-power heating mode on the functional panel 230 receives the opening operation of the user, the functional panel 230 generates a corresponding electrical signal and sends the electrical signal to the electromagnetic heating circuit 100, and when the electromagnetic heating circuit 100 receives the electrical signal, it determines that the high-power heating mode is currently required to be entered.
Referring to fig. 2, the electromagnetic heating circuit 100 includes a power module 10, a resonance module 30, a driving module 50, and a control module 70. The resonance module 30 is connected to the power module 10, and the resonance module 30 includes a heating coil 310, a first resonance capacitor 320, N second resonance capacitors 330, a first switch 340, and N second switches 350, where N is greater than or equal to 1. Specifically, the heating coil 310, the first switch 340, and the power module 10 are sequentially connected in series to form a current loop. The first resonant capacitor 320 and the N second resonant capacitors 330 are respectively connected in parallel with the heating coil 310, and the N second switches 350 are connected to the branches where the N second resonant capacitors 330 are located in a one-to-one correspondence. The driving module 50 is connected to the control terminal 341 of the first switch 340. The control module 70 is connected to the driving module 50 and the N second switches 350, and the control module 70 is configured to: by controlling the switching states of the N second switches 350, the heating power of the electromagnetic heating circuit 100 is controlled.
Since the resonance module 30 in this embodiment includes the first resonance capacitors 320 and the N second resonance capacitors 330 connected in parallel to the two ends of the heating coil 310, the control module 70 can control whether the N second resonance capacitors 330 are connected to the resonance module 30 by controlling the switching states of the N second switches 350. Since the resonance module 30 increases the equivalent capacitance value of the resonance capacitor when the second resonance capacitor 330 is more connected, that is, the LC resonance parameter of the electromagnetic heating circuit 100 is increased, and thus the heating power of the electrical equipment 200 (for example, an induction cooker) configured with the electromagnetic heating circuit 100 is increased, and the heating power interval of the induction cooker is widened.
Each of the modules in the electromagnetic heating circuit 100 provided in the embodiment of the present application is described below with reference to fig. 2 and 3.
The power module 10 provides power to the resonance module 30. In fig. 3, the power module 10 may include a full-wave rectifier bridge BD1, a first inductor L1, and a first capacitor C1. The signal input terminal of the full-wave rectifier bridge BD1 is used for inputting an alternating current (e.g., a mains supply), and the full-wave rectifier bridge BD1 is used for rectifying the input alternating current, that is, converting the alternating current into a direct current. The LC filter circuit formed by the first inductor L1 and the first capacitor C1 is connected between the signal output end of the full-wave rectifier bridge BD1 and the resonance module 30, and is used for filtering the direct current output by the full-wave rectifier bridge BD1, and transmitting the filtered direct current to the resonance module 30, so that interference of signal noise in the direct current to the resonance module 30 is reduced.
The resonance module 30 is connected between the power module 10 and the driving module 50, and is used for storing the direct current voltage output by the power module 10 and converting the direct current voltage into high-frequency alternating current so as to generate an eddy current effect. The resonance module 30 in the present embodiment may include a heating coil 310, a first resonance capacitor 320, N second resonance capacitors 330, a first switch 340, and N second switches 350, N being greater than or equal to 1. The heating coil 310, the first switch 340 and the power module 10 are sequentially connected in series to form a current loop. In the embodiment shown in fig. 2 and 3, one end of the heating coil 310 is connected to a first voltage output terminal of the power module 10, the other end of the heating coil 310 is connected to a first connection terminal of the first switch 340, and a second connection terminal of the first switch 340 is connected to a second voltage output terminal of the power module 10.
Specifically, the heating coil 310 may be an induction coil. The first switch 340 may be an insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, IGBT), which is a power semiconductor field-controlled self-turn-off device. In this embodiment, the collector (i.e., the first connection terminal) of the IGBT is connected to the heating coil 310, the emitter (i.e., the second connection terminal) of the IGBT is connected to the power module 10, and the gate (i.e., the control terminal 341) of the IGBT is connected to the driving module 50 for receiving the output voltage transmitted from the driving module 50.
The first resonant capacitor 320 and the N second resonant capacitors 330 are respectively connected in parallel with the heating coil 310, and the N second switches 350 are connected to the branches where the N second resonant capacitors 330 are located in a one-to-one correspondence. Since the N second resonant capacitors 330 and the first resonant capacitors 320 in the present embodiment are connected in parallel, the number of the second resonant capacitors 330 connected in parallel with the first resonant capacitors 320 can be further adjusted by controlling the switching states of the N second switches 350 corresponding to the N second resonant capacitors 330. Specifically, the greater the number of the second resonant capacitors 330 connected in parallel, the greater the equivalent capacitance of the plurality of second resonant capacitors 330 and the first resonant capacitor 320 connected in parallel, that is, the LC resonance parameter of the electromagnetic heating circuit 100 is enlarged, so that the electromagnetic heating circuit 100 has higher heating power.
Specifically, the first and second resonance capacitances 320 and 330 may be withstand voltage capacitances. The second switch 350 may be a switching transistor, such as a bipolar junction transistor (Bipolar Junction Transistor, BJT), a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET), or the like, which is not particularly limited in this embodiment. In this embodiment, the control ends of the N second switches 350 are respectively connected to the control module 70, and are configured to receive a control signal sent by the control module 70. In some embodiments, the control signal may be a high level signal, and the second switch 350 is in a closed state upon receiving the high level signal. In other embodiments, the control signal may be a low level signal, and the second switch 350 is in an off state upon receiving the low level signal. Specifically, the specific values of the high level signal and the low level signal are determined by the type of the switching transistor, which is not particularly limited in the present embodiment.
In this embodiment, N may be equal to 1, that is, the number of the second resonant capacitor 330 and the second switch 350 is one. Referring to fig. 3, a second resonant capacitor 330 and a second switch 350 are connected in series and then connected in parallel to two ends of the first resonant capacitor 320.
The control module 70 is connected to the N second switches 350, and the control module 70 may be a micro control unit (Micro Controller Unit, MCU) or may be implemented by using other control chips. Specifically, the control module 70 is configured to: by controlling the switching states of the N second switches 350, the heating power of the electromagnetic heating circuit 100 is controlled. Specifically, the control module 70 may send control signals (e.g., high-low level signals) to the N second switches 350 to control the second switches 350 to be in the closed state or the open state, so as to adjust the heating power of the electromagnetic heating circuit 100.
The driving module 50 is connected between the first switch 340 in the resonance module 30 and the control module 70, and is configured to output a driving voltage to the control terminal 341 of the first switch 340 under the control of the control module 70, where the driving voltage is used to control the first switch 340 to be in a conductive state. The magnitude of the driving voltage may be determined according to the type and the specific model of the first switch 340, which is not particularly limited in this embodiment. In some possible embodiments, the drive voltage may be greater than 15V and less than 20V, for example, the drive voltage is 18V.
In this embodiment, the driving module 50 may include a plurality of driving units 510, one ends of the driving units 510 are connected to the control module 70, the other ends are connected to the control end 341 of the first switch 340, and driving voltages output by the driving units 510 are different from each other. Specifically, the driving unit 510 may be a dedicated driving chip or may be a driving circuit including a plurality of power electronic components. In this embodiment, the control module 70 may control the plurality of driving units 50 to sequentially output driving voltages in time sequence, and the voltage values of the plurality of driving voltages are gradually increased (i.e. step voltage driving is adopted), so that the hard turn-on loss of the electromagnetic heating circuit 100 under the condition of small LC resonance energy can be reduced, and further, the heating power of the electromagnetic heating circuit 100 is further reduced, so as to realize low-power heating of the electromagnetic heating circuit 100.
In the embodiment shown in fig. 3, the plurality of driving units 510 may include a first driving unit 512 and a second driving unit 514. Wherein the driving voltage of the first driving unit 512 is greater than the driving voltage of the second driving unit 514, in some possible embodiments, the driving voltage of the first driving unit 512 may be greater than 15V and less than 20V, for example, the driving voltage of the first driving unit 512 is 18V; the driving voltage of the second driving unit 514 may be greater than 7V and less than 12V, for example, the driving voltage of the second driving unit 514 is 9V.
In the present embodiment, the control module 70 is further connected to the driving module 50, and in the case that the driving module 50 includes a plurality of driving units 510, the control module 70 is further configured to: by controlling the switching state of the second switch 350 and the operation mode of the driving module 50, the heating efficiency of the electromagnetic heating circuit 100 is controlled. The driving voltages output to the first switch 340 are different in different operation modes of the driving module 50. Specifically, the driving module 50 may directly output a constant driving voltage to the first switch 340, that is, a rated on voltage of the first switch 340, to implement hard turn-on of the first switch 340. The driving module 50 may also output one or more driving voltages smaller than the rated opening voltage to the first switch 340, where the driving voltages can control the first switch 340 to enter a pre-conductive state, and in the pre-conductive state, the first switch 340 may enter a discharge state; after the first switch 340 enters a discharging state for a period of time, the driving module 50 outputs the rated turn-on voltage to the first switch 340. That is, the driving module 50 turns on the first switch 340 in a step voltage driving manner, so as to reduce the hard turn-on loss of the electromagnetic heating circuit 100 under the condition of smaller LC resonance energy, further reduce the heating power of the electromagnetic heating circuit 100, and realize low-power heating of the electromagnetic heating circuit 100.
In other embodiments, N may be equal to 1, and the plurality of driving units 510 may include a first driving unit 512 and a second driving unit 514. In this case, the control module 70 is further configured to: the second switch 350 is controlled to be closed, and the driving module 50 is controlled to be in the first operation mode, so that the heating power of the electromagnetic heating circuit 100 belongs to the first power interval. The second switch 350 is controlled to be turned off, and the driving module 50 is controlled to be in the first operation mode, so that the heating power of the electromagnetic heating circuit 100 belongs to the second power interval. The second switch 350 is controlled to be turned off, and the driving module 50 is controlled to be in the second operation mode, so that the heating power of the electromagnetic heating circuit 100 belongs to the third power interval. The lower limit value of the first power interval is larger than the upper limit value of the second power interval, and the lower limit value of the second power interval is larger than the upper limit value of the third power interval. The first operation mode refers to an operation mode in which the first driving unit 512 outputs the first driving voltage to the first switch 340 in a designated period. The second operation mode refers to an operation mode in which the second driving unit 514 outputs the second driving voltage to the first switch 340 during a first period of a designated period, and the first driving unit outputs the first driving voltage to the first switch 340 during a second period of the designated period, wherein the first period is earlier than the second period. Specifically, the specific operation of the control module 70 is described in detail in the method embodiments below.
In the embodiment, since the resonant module 30 in the electromagnetic heating circuit 100 includes the first resonant capacitor 320 and the N second resonant capacitors 330 connected in parallel at two ends of the heating coil 310, the control module 70 can control whether the N second resonant capacitors 330 are connected to the resonant module 30 by controlling the switching states of the N second switches 350. Since the resonance module 30 increases the equivalent capacitance value of the resonance capacitor when the second resonance capacitor 330 is more connected, that is, the LC resonance parameter of the electromagnetic heating circuit 100 is increased, and thus the heating power of the electrical equipment 200 (for example, an induction cooker) configured with the electromagnetic heating circuit 100 is increased, and the heating power interval of the induction cooker is widened.
The following describes a control method applied to the electromagnetic heating circuit 100 described above.
Referring to fig. 4, fig. 4 schematically illustrates a control method of an electromagnetic heating circuit according to a first embodiment of the present application, where the control method may include steps S410 to S430.
In step S410, the desired heating power of the electromagnetic heating circuit is obtained.
In this embodiment, the control module in the electromagnetic heating circuit may establish electrical connection with the functional panel on the electrical apparatus, and receive the electrical signal sent by the functional panel. The electric signal can be generated by pressing a key on the functional panel or by stirring a knob on the functional panel. As an embodiment, a heating power map may be stored in the control module, which is used to characterize the mapping between different heating modes and different desired heating powers on the functional panel. And under the condition that the control module receives the electric signal sent by the functional panel, determining a corresponding heating mode based on the electric signal, and further determining the expected heating power of the electromagnetic heating circuit based on the heating power mapping table. Wherein the desired heating power, i.e. the target heating power, characterizes the heating power that the electromagnetic heating circuit needs to reach after a period of operation.
In some embodiments, a heating mode may be preset in the control module, where the heating mode characterizes the corresponding desired heating power at different heating moments. The control module determines the desired heating power from the pre-stored heating parameters in the event that the heating mode is determined.
Step S420, determining a target switch state of the second switch based on the desired heating power.
In this embodiment, the target switch states may be a closed state and an open state. The number of the second switches in the closed state is larger, the number of the second resonance capacitors connected in parallel with the first resonance capacitors is larger, namely the equivalent capacitance of the resonance capacitors in the electromagnetic heating circuit is larger, so that the electromagnetic heating circuit has higher actual heating power. Thus, in case the desired heating power is larger, if the control module needs to make the actual heating power approach the desired heating power, more second switches are controlled to be in a closed state.
As an embodiment, a switch state map may be pre-stored in the control module, where the switch state map characterizes target switch states of the one or more second switches at different heating power intervals. The control module may determine the corresponding heating power interval based on the desired heating power first, and then determine the switch state of the second switch based on the switch state mapping table. Taking the number of second switches as an example, the switch state map may be as shown in table-1.
TABLE-1
| Heating power interval | Second switch |
| (2000W，3500W] | Closed state |
| [300W,2000W] | Off state |
For example, in the case where the desired heating power is 1000W, the control module then determines that the target switch state of the second switch is an off state; in the case where the desired heating power is 3000W, the control module then determines that the target switch state of the second switch is a closed state.
In step S430, based on the target switch state, the actual heating power of the electromagnetic heating circuit is controlled so that the actual heating power approaches the desired heating power.
In this embodiment, the control module may generate a corresponding control signal based on the target switch state of the second switch, and control the second switch based on the control signal, so as to control the actual heating power of the electromagnetic heating circuit, so that the actual heating power approaches the desired heating power.
Taking the number of the second switches as an example, when the expected heating power is 1000W, based on the fact that the target switch state of the second switch is the off state determined by the table-1, the control module generates and sends a low-level signal to the second switch, and only the first resonant capacitor is connected to the electromagnetic heating circuit at this time, that is, the equivalent capacitance value of the resonant capacitor is smaller, the energy of the LC resonant circuit is reduced, and the actual heating power of the electromagnetic heating circuit is reduced. Under the condition that the expected heating power is 3000W, based on the fact that the target switch state of the second switch is the on state, which is determined by the table-1, the control module generates and sends a high-level signal to the second switch, and at the moment, the first resonant capacitor and the second resonant capacitor are connected in parallel to the electromagnetic heating circuit, namely, the equivalent capacitance of the resonant capacitor is increased, namely, LC resonance parameters of the electromagnetic heating circuit are enlarged, and the actual heating power of the electromagnetic heating circuit is increased.
The application provides a control method of an electromagnetic heating circuit, which controls whether N second resonance capacitors are connected into a resonance module or not by controlling the switching states of N second switches. The equivalent capacitance value of the resonance capacitor is increased under the condition that the second resonance capacitor is more connected with the resonance module, namely, LC resonance parameters of the electromagnetic heating circuit are enlarged, and the heating power of the electromagnetic oven provided with the electromagnetic heating circuit is further improved.
Referring to fig. 5, fig. 5 schematically illustrates a control method of an electromagnetic heating circuit according to a second embodiment of the present application, where the control method may include steps S510 to S540.
Step S510, obtaining the desired heating power of the electromagnetic heating circuit.
Step S520, determining a target switch state of the second switch based on the desired heating power.
The specific implementation manner of step S510 to step S520 may refer to the detailed descriptions in step S410 to step S420, and will not be described in detail herein.
In step S530, a target operation mode of the driving module is determined based on the desired heating power.
The target operation mode refers to an output mode of a driving voltage, and the plurality of driving units include a first driving unit and a second driving unit. In some embodiments, the target operating mode may include a first operating mode, and the driving module in the first operating mode may output a constant first driving voltage to the first switch through the first driving unit for a designated period, wherein the first driving voltage may be a rated on voltage (e.g., 18V) of the first switch, and the designated period is a closed period of the first switch. Referring to fig. 6, fig. 6 shows a waveform diagram of a driving voltage. Part (a) of fig. 6 shows a waveform diagram of the driving voltage output by the driving module when the target operation mode is the first operation mode.
It should be noted that, in the case of the first operation mode, the driving module has a larger turn-on loss of the first switch, so that the actual heating power of the electromagnetic heating circuit is larger. For example, the actual heating power of an electromagnetic heating circuit is often greater than 1000W. Accordingly, the control module may determine that the target operating mode of the drive module is the first operating mode if the desired heating power is greater than a specified threshold (e.g., 1000W).
In other embodiments, the target operation mode may include a second operation mode, and the driving module in the second operation mode may output a stepped driving voltage to the first switch in a specified period, and the peak value of the stepped driving voltage is the first driving voltage (i.e., the rated on voltage of the first switch). Referring to fig. 6 again, a schematic waveform of the step-shaped driving voltage is shown in part (b) of fig. 6. Specifically, the driving module outputs a second driving voltage (for example, 9V) to the first switch through the second driving unit during a first period of a designated period, and outputs the first driving voltage to the first switch through the first driving unit during a second period of the designated period. Specifically, the first period is earlier than the second period, and the duration corresponding to the first period and the duration corresponding to the second period may be the same or different, which is not specifically limited in this embodiment.
It is to be understood that, since the second driving voltage is smaller than the first driving voltage and the first driving voltage is the rated on voltage of the first switch, the first period may be understood as a driving discharge period of the first switch and the second period is a normally-closed period of the second switch. When the driving module outputs the second driving voltage, the first switch enters a pre-conduction state, and at the moment, the first switch enters a discharge state, so that the turn-on loss of the first switch is reduced. When the first switch is driven by the driving voltage in the second operation mode, the actual heating power of the electromagnetic heating circuit can be reduced due to lower turn-on loss of the first switch compared with the first operation mode, that is, the actual heating power of the electromagnetic heating circuit can be less than 1000W. Accordingly, the control module may determine that the target operating mode of the drive module is the second operating mode if the desired heating power is less than the specified threshold.
Here, the step S520 and the step S530 are performed in no chronological order, that is, the step S520 may be performed earlier than the step S530, may be performed later than the step S530, or may be performed simultaneously with the step S530.
Step S540, based on the target switch state and the target operation mode, controls the actual heating power of the electromagnetic heating circuit so that the actual heating power approaches the desired heating power.
In this embodiment, the control module may generate a corresponding control signal based on the target switch state, and control the second switch based on the control signal. The control module can also determine the driving voltage output by the driving module based on the target working mode, and then send the driving voltage to the first switch.
In some embodiments, step S540 may specifically include steps S5410 to S5430.
In step S5410, the second switch is controlled to be turned on, and the driving module is controlled to be in the first operation mode, so that the actual heating power of the electromagnetic heating circuit belongs to the first power interval.
In this embodiment, the first operation mode refers to an operation mode in which the first driving unit outputs the first driving voltage to the first switch in a specified period. The first power interval may be an interval greater than 2000W and less than 3500W.
As an implementation manner, the control module may send a high-level signal to the second switch to control the second switch to be closed, and control the first driving unit in the driving module to output the first driving voltage to the first switch in a specified period, so that the actual heating power of the electromagnetic heating circuit belongs to the first power section.
In step S5420, the second switch is controlled to be turned off, and the driving module is controlled to be in the first operation mode, so that the actual heating power of the electromagnetic heating circuit belongs to the second power interval.
In this embodiment, the lower limit value of the first power section is greater than the upper limit value of the second power section. The second power interval may be an interval greater than 1000W and less than 2000W.
As an implementation manner, the control module may send a low-level signal to the second switch to control the second switch to be turned off, and control the first driving unit in the driving module to output the first driving voltage to the first switch in a specified period, so that the actual heating power of the electromagnetic heating circuit belongs to the second power section.
In step S5430, the second switch is controlled to be turned off, and the driving module is controlled to be in the second operation mode, so that the actual heating power of the electromagnetic heating circuit belongs to the third power interval.
In this embodiment, the second operation mode refers to an operation mode in which the second driving unit outputs the second driving voltage to the first switch in the first period of the designated period, and the first driving unit outputs the first driving voltage to the first switch in the second period of the designated period. The lower limit of the second power interval is greater than the upper limit of the third power interval. The third power interval may be an interval greater than 300W and less than 1000W.
As an embodiment, the control module may send a low-level signal to the second switch to control the second switch to be turned off, and control the second driving unit in the driving module to output the second driving voltage to the first switch in the first period of the designated period, and control the first driving unit in the driving module to output the first driving voltage to the first switch in the second period of the designated period, so that the actual heating power of the electromagnetic heating circuit belongs to the third power section.
According to the embodiment, the actual heating power of the electromagnetic heating circuit can be dynamically adjusted by controlling the switching state of the second switch and the voltage waveform of the driving voltage output by the driving module, and particularly, the electromagnetic heating circuit can realize continuous power heating of 300W to 3000W, so that the heating power range of the electromagnetic heating circuit is widened.
Referring to fig. 7, fig. 7 schematically illustrates a control device 700 of an electromagnetic heating circuit according to an embodiment of the application, where the control device 700 is applied to the electromagnetic heating circuit 100. In this embodiment, the control apparatus 700 may include an acquisition module 710, a determination module 720, and a control module 730. Wherein the acquisition module 710 is configured to acquire a desired heating power of the electromagnetic heating circuit. The determination module 720 is configured to determine a target switch state of the second switch based on the desired heating power. The control module 730 is configured to control the actual heating power of the electromagnetic heating circuit based on the target switch state such that the actual heating power approaches the desired heating power.
In some embodiments, the control device 700 may further include a mode determination module (not shown). The mode determination module is configured to determine a target operating mode of the drive module based on the desired heating power. The control module 730 is further configured to control the actual heating power of the electromagnetic heating circuit based on the target switch state and the target operating mode such that the actual heating power approaches the desired heating power.
In some embodiments, the control module 730 is further configured to control the second switch to be closed, and control the driving module to be in the first operation mode, so that the actual heating power of the electromagnetic heating circuit belongs to the first power interval; the second switch is controlled to be disconnected, and the driving module is controlled to be in a first working mode, so that the actual heating power of the electromagnetic heating circuit belongs to a second power interval; the second switch is controlled to be disconnected, and the driving module is controlled to be in a second working mode, so that the actual heating power of the electromagnetic heating circuit belongs to a third power interval; wherein the lower limit value of the first power interval is larger than the upper limit value of the second power interval, and the lower limit value of the second power interval is larger than the upper limit value of the third power interval; the first operation mode refers to an operation mode in which the first driving unit outputs a first driving voltage to the first switch in a specified period; the second operation mode refers to an operation mode in which the second driving unit outputs the second driving voltage to the first switch in a first period of a designated period, and the first driving unit outputs the first driving voltage to the first switch in a second period of the designated period, the first period being earlier than the second period.
It will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the apparatus and modules described above may refer to the corresponding process in the foregoing method embodiment, which is not repeated herein.
In several embodiments provided by the present application, the coupling of the modules to each other may be electrical, mechanical, or other.
In addition, each functional module in each embodiment of the present application may be integrated into one processing module, or each module may exist alone physically, or two or more modules may be integrated into one module. The integrated modules may be implemented in hardware or in software functional modules.
The application provides a control device of an electromagnetic heating circuit, which controls whether N second resonance capacitors are connected with a resonance module or not by controlling the switching states of N second switches. The equivalent capacitance value of the resonance capacitor is increased under the condition that the second resonance capacitor is more connected with the resonance module, namely, LC resonance parameters of the electromagnetic heating circuit are enlarged, and then the heating power interval of the electromagnetic oven provided with the electromagnetic heating circuit is improved.
Referring to fig. 8, fig. 8 schematically illustrates an electromagnetic heating circuit 800 according to an embodiment of the present application, where the electromagnetic heating circuit 800 includes: one or more processors 810, memory 820, and one or more application programs. Wherein one or more application programs are stored in the memory 820 and configured to be executed by the one or more processors 810, the one or more application programs configured to perform the methods described in the above embodiments.
Processor 810 may include one or more processing cores. The processor 810 connects various parts within the overall battery management system using various interfaces and lines, performs various functions of the battery management system and processes data by executing or executing instructions, programs, code sets, or instruction sets stored in the memory 820, and invoking data stored in the memory 820. Alternatively, the processor 810 may be implemented in at least one hardware form of digital signal Processing (DIGITAL SIGNAL Processing, DSP), field-Programmable gate array (Field-Programmable GATE ARRAY, FPGA), programmable logic array (Programmable Logic Array, PLA). The processor 810 may integrate one or a combination of several of a central processor 810 (Central Processing Unit, CPU), an image processor 810 (Graphics Processing Unit, GPU), and a modem, etc. The CPU mainly processes an operating system, a user interface, an application program and the like; the GPU is used for being responsible for rendering and drawing of display content; the modem is used to handle wireless communications. It will be appreciated that the modem may not be integrated into the processor 810 and may be implemented solely by a single communication chip.
The Memory 820 may include a random access Memory 820 (Random Access Memory, RAM) or a Read-Only Memory 820 (ROM). Memory 820 may be used to store instructions, programs, code, sets of codes, or sets of instructions. The memory 820 may include a stored program area and a stored data area, wherein the stored program area may store instructions for implementing an operating system, instructions for implementing at least one function (e.g., a touch function, a sound playing function, an image playing function, etc.), instructions for implementing the various method embodiments described above, and the like. The storage data area may also store data created by the electronic device map in use (e.g., phonebook, audiovisual data, chat log data), and the like.
In some embodiments, electromagnetic heating circuit 800 may include a control module (not shown) that includes one or more processors 810 and memory 820.
Referring to fig. 9, fig. 9 schematically illustrates that an embodiment of the present application further provides a computer readable storage medium 900, where the computer readable storage medium 900 stores computer program instructions 910, and the computer program instructions 910 may be called by a processor to perform the method described in the above embodiment.
The computer readable storage medium 900 may be, for example, a flash Memory, an electrically erasable programmable Read-Only Memory (EEPROM), an electrically programmable Read-Only Memory (ELECTRICAL PROGRAMMABLE READ ONLY MEMORY, EPROM), a hard disk, or a Read-Only Memory (ROM). Optionally, computer readable storage medium 900 includes Non-volatile computer readable storage media (Non-transitory Computer-readable Storage Medium). The computer readable storage medium 900 has storage space for computer program instructions 910 that perform any of the method steps described above. The computer program instructions 910 may be read from or written to one or more computer program products.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the application has been described in detail with reference to the foregoing embodiments, it will be appreciated by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not drive the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. An electromagnetic heating circuit, comprising:
a power module;
the resonance module is connected to the power supply module and comprises a heating coil, a first resonance capacitor, N second resonance capacitors, a first switch and N second switches, wherein N is greater than or equal to 1;
The heating coil, the first switch and the power supply module are sequentially connected in series to form a current loop;
The first resonant capacitor and the N second resonant capacitors are respectively connected with the heating coil in parallel, and the N second switches are connected into branches where the N second resonant capacitors are located in a one-to-one correspondence manner;
The driving module is connected to the control end of the first switch; and
The control module is connected with the driving module and the N second switches; the control module is configured to: and controlling the heating power of the electromagnetic heating circuit by controlling the switching states of the N second switches.
2. The electromagnetic heating circuit according to claim 1, wherein the driving module includes a plurality of driving units, one ends of the plurality of driving units are connected to the control module, the other ends are connected to the control end of the first switch, and driving voltages outputted from the plurality of driving units are different from each other; the control module is specifically configured to:
controlling the heating efficiency of the electromagnetic heating circuit by controlling the switching state of the second switch and the working mode of the driving module; and the driving module outputs different driving voltages to the first switch under different working modes.
3. The electromagnetic heating circuit of claim 2, wherein N is equal to 1; the plurality of driving units comprise a first driving unit and a second driving unit, and the driving voltage of the first driving unit is larger than that of the second driving unit; the control module is specifically configured to:
Controlling the second switch to be closed, and controlling the driving module to be in a first working mode so that the heating power of the electromagnetic heating circuit belongs to a first power interval;
The second switch is controlled to be disconnected, and the driving module is controlled to be in a first working mode, so that the heating power of the electromagnetic heating circuit belongs to a second power interval;
the second switch is controlled to be disconnected, and the driving module is controlled to be in a second working mode, so that the heating power of the electromagnetic heating circuit belongs to a third power interval;
Wherein the lower limit value of the first power interval is greater than the upper limit value of the second power interval, and the lower limit value of the second power interval is greater than the upper limit value of the third power interval; the first working mode refers to a working mode that the first driving unit outputs the first driving voltage to the first switch in a specified period; the second operation mode is an operation mode in which the second driving unit outputs the second driving voltage to the first switch in a first period of the designated period, and the first driving unit outputs the first driving voltage to the first switch in a second period of the designated period, the first period being earlier than the second period.
4. An electrical device, comprising:
A housing; and
An electromagnetic heating circuit as claimed in any one of claims 1 to 3.
5. A control method of an electromagnetic heating circuit, characterized by being applied to the electromagnetic heating circuit as claimed in any one of claims 1 to 3, the method comprising:
acquiring expected heating power of the electromagnetic heating circuit;
determining a target switch state of the second switch based on the desired heating power;
Based on the target switch state, an actual heating power of the electromagnetic heating circuit is controlled so that the actual heating power approaches the desired heating power.
6. The method of claim 5, wherein the method further comprises:
determining a target operating mode of the drive module based on the desired heating power;
the controlling the actual heating power of the electromagnetic heating circuit based on the target switch state so that the actual heating power approaches the desired heating power includes:
and controlling the actual heating power of the electromagnetic heating circuit based on the target switch state and the target working mode so that the actual heating power approaches the expected heating power.
7. The method of claim 6, wherein controlling the actual heating power of the electromagnetic heating circuit based on the target switch state and the target operating mode such that the actual heating power approaches the desired heating power comprises:
Controlling the second switch to be closed, and controlling the driving module to be in a first working mode so that the actual heating power of the electromagnetic heating circuit belongs to a first power interval;
The second switch is controlled to be disconnected, and the driving module is controlled to be in a first working mode, so that the actual heating power of the electromagnetic heating circuit belongs to a second power interval;
The second switch is controlled to be disconnected, and the driving module is controlled to be in a second working mode, so that the actual heating power of the electromagnetic heating circuit belongs to a third power interval;
Wherein the lower limit value of the first power interval is greater than the upper limit value of the second power interval, and the lower limit value of the second power interval is greater than the upper limit value of the third power interval; the first working mode refers to a working mode that the first driving unit outputs the first driving voltage to the first switch in a specified period; the second operation mode is an operation mode in which the second driving unit outputs the second driving voltage to the first switch in a first period of the designated period, and the first driving unit outputs the first driving voltage to the first switch in a second period of the designated period, the first period being earlier than the second period.
8. A control device of an electromagnetic heating circuit, characterized by being applied to an electromagnetic heating circuit as claimed in any one of claims 1 to 3, the method comprising:
the acquisition module is used for acquiring expected heating power of the electromagnetic heating circuit;
a determining module for determining a target switch state of the second switch based on the desired heating power;
and the control module is used for controlling the actual heating power of the electromagnetic heating circuit based on the target switch state so that the actual heating power approaches to the expected heating power.
9. An electromagnetic heating circuit, comprising:
one or more processors;
A memory;
one or more applications, wherein one or more of the applications are stored in the memory and configured to be executed by one or more of the processors and configured to perform the method of any of claims 5-7.
10. A computer readable storage medium having stored therein computer program instructions which are callable by a processor to perform the method according to any one of claims 5-7.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211718278.3A CN118283862A (en) | 2022-12-29 | 2022-12-29 | Control method and device of electromagnetic heating circuit and electromagnetic heating circuit |
| PCT/CN2023/121559 WO2024139476A1 (en) | 2022-12-29 | 2023-09-26 | Control method and apparatus for electromagnetic heating circuit, and electromagnetic heating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211718278.3A CN118283862A (en) | 2022-12-29 | 2022-12-29 | Control method and device of electromagnetic heating circuit and electromagnetic heating circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118283862A true CN118283862A (en) | 2024-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211718278.3A Pending CN118283862A (en) | 2022-12-29 | 2022-12-29 | Control method and device of electromagnetic heating circuit and electromagnetic heating circuit |
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| Country | Link |
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| CN (1) | CN118283862A (en) |
| WO (1) | WO2024139476A1 (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203104830U (en) * | 2012-12-31 | 2013-07-31 | 美的集团股份有限公司 | Electromagnetic heating apparatus |
| CN203457342U (en) * | 2013-07-11 | 2014-02-26 | 美的集团股份有限公司 | Electromagnetic heating device and control circuit thereof |
| CN203708523U (en) * | 2013-12-20 | 2014-07-09 | 美的集团股份有限公司 | Control circuit for electromagnetic heating device and electromagnetic heating device |
| CN204145789U (en) * | 2014-09-25 | 2015-02-04 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic Heating control device and electromagnetic heating apparatus |
| CN204539511U (en) * | 2015-04-07 | 2015-08-05 | 佛山市顺德区美的电热电器制造有限公司 | Cooking apparatus and the electromagnetic heater for cooking apparatus |
| CN106162969B (en) * | 2015-04-07 | 2019-12-31 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating device and resonant circuit thereof |
| WO2017088244A1 (en) * | 2015-11-27 | 2017-06-01 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating device |
| CN108024403B (en) * | 2016-11-03 | 2021-03-19 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating system and control method and device thereof |
-
2022
- 2022-12-29 CN CN202211718278.3A patent/CN118283862A/en active Pending
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2023
- 2023-09-26 WO PCT/CN2023/121559 patent/WO2024139476A1/en unknown
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