CN114698168B - Electromagnetic heating equipment, power control method and power control device thereof - Google Patents
Electromagnetic heating equipment, power control method and power control device thereof Download PDFInfo
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- CN114698168B CN114698168B CN202011589019.6A CN202011589019A CN114698168B CN 114698168 B CN114698168 B CN 114698168B CN 202011589019 A CN202011589019 A CN 202011589019A CN 114698168 B CN114698168 B CN 114698168B
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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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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/08—Pressure-cookers; Lids or locking devices specially adapted therefor
- A47J27/086—Pressure-cookers; Lids or locking devices specially adapted therefor with built-in heating means
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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
- H05B6/08—Control, e.g. of temperature, of power using compensating or balancing arrangements
Abstract
The invention discloses electromagnetic heating equipment, a power control method and a power control device thereof, wherein the power control method comprises the following steps: when a plurality of adjacent heating modules of the electromagnetic heating equipment are determined to work simultaneously, acquiring the target power of each heating module; and determining the power modulation ratio of each heating module according to the target power of the plurality of adjacent heating modules, and controlling the output power of the corresponding heating module according to the power modulation ratio of each heating module so that the plurality of adjacent heating modules work at intervals. According to the power control method of the electromagnetic heating equipment, the working frequency of the plurality of adjacent heating modules is larger than the resonant frequency, the condition that the power tube works in a hard-on state is avoided, the conduction loss of the power tube is reduced, the temperature rise is reduced, and the reliability of products is improved.
Description
Technical Field
The invention relates to the technical field of electromagnetic heating equipment, in particular to electromagnetic heating equipment, a power control method and a power control device thereof.
Background
In the related art, when a plurality of heating areas of an electromagnetic heating device are heated corresponding to a plurality of wire coils in a combined manner and two or more adjacent heating areas are heated simultaneously, when the actual working frequency of some heating areas is lower than the corresponding power resonance parameters output by the wire coils and the cooker, the power tube is hard to open (high-voltage conduction), so that the switching loss of the power tube is high, the temperature is increased, and the reliability is reduced.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a power control method of electromagnetic heating equipment, which avoids the power tube from working in a hard-on state and reduces conduction loss and temperature rise.
The invention also proposes a computer readable storage medium.
The invention also provides electromagnetic heating equipment capable of realizing the power control method.
The invention also provides a power control device of the electromagnetic heating equipment.
In order to achieve the above object, an embodiment of the present invention provides a power control method for an electromagnetic heating apparatus, including the following steps: when a plurality of adjacent heating modules of the electromagnetic heating equipment are determined to work simultaneously, acquiring the target power of each heating module; and determining the power modulation ratio of each heating module according to the target power of the plurality of adjacent heating modules, and controlling the output power of the corresponding heating module according to the power modulation ratio of each heating module so that the plurality of adjacent heating modules work at intervals.
According to the power control method of the electromagnetic heating equipment, the output power of each heating module is controlled according to the power regulation ratio of the corresponding heating module, so that a plurality of adjacent heating modules work at intervals, the working frequency of the plurality of adjacent heating modules is higher than the resonance frequency, the condition that the power tube works in a hard-on state is avoided, the conduction loss of the power tube is reduced, the temperature rise is reduced, and the reliability of products is improved.
In addition, the power control method of the electromagnetic heating apparatus according to the above embodiment of the present invention may further have the following additional technical features:
according to some embodiments of the invention, when the plurality of adjacent heating modules are adjacent first heating modules and second heating modules, determining the power adjustment ratio of each heating module according to the target power of the plurality of adjacent heating modules includes: determining a first calculation power and a second calculation power according to the sum of the target power of the first heating module and the target power of the second heating module and the rated output power of the electromagnetic heating device when the sum of the target power of the first heating module and the target power of the second heating module is greater than or equal to the minimum output power of the electromagnetic heating device and less than or equal to the rated output power of the electromagnetic heating device; dividing the target power of the first heating module by the first calculated power to obtain a power transfer ratio of the first heating module, and dividing the target power of the second heating module by the second calculated power to obtain the power transfer ratio of the second heating module.
According to some embodiments of the invention, the first calculated power is equal to the second calculated power and is equal to a sum of a target power of the first heating module and a target power of the second heating module.
According to some embodiments of the invention, the first heating module has a same duty cycle as the second heating module.
According to some embodiments of the invention, when the plurality of adjacent heating modules are adjacent first heating modules and second heating modules, determining the power adjustment ratio of each heating module according to the target power of the plurality of adjacent heating modules includes: when the sum of the target power of the first heating module and the target power of the second heating module is determined to be smaller than the minimum output power of the electromagnetic heating device, determining third calculation power and fourth calculation power according to the minimum output power of the electromagnetic heating device and the rated output power of the electromagnetic heating device; dividing the target power of the first heating module by the third calculated power to obtain a power transfer ratio of the first heating module, and dividing the target power of the second heating module by the fourth calculated power to obtain the power transfer ratio of the second heating module.
According to some embodiments of the invention, the third calculated power is equal to the fourth calculated power and is equal to one half of a rated output power of the electromagnetic heating device.
According to some embodiments of the invention, the first heating module has a higher duty cycle than the second heating module.
According to some embodiments of the invention, when the plurality of adjacent heating modules are adjacent first heating modules and second heating modules, if it is determined that the interval time between the first heating module and the second heating module is longer than a preset duration, the power adjustment ratio of the first heating module and the power adjustment ratio of the second heating module are respectively divided.
To achieve the above object, an embodiment of the present invention provides a computer readable storage medium having stored thereon a power control program of an electromagnetic heating apparatus, which when executed by a processor, implements a power control method of an electromagnetic heating apparatus according to an embodiment of the present invention.
In order to achieve the above objective, an embodiment of the present invention provides an electromagnetic heating device, including a memory, a processor, and a power control program of the electromagnetic heating device stored in the memory and capable of running on the processor, where the power control program is executed by the processor, to implement the power control method of the electromagnetic heating device according to the embodiment of the present invention.
To achieve the above object, an embodiment of the present invention provides a power control device of an electromagnetic heating apparatus, including: the acquisition module is used for acquiring the target power of each heating module when a plurality of adjacent heating modules of the electromagnetic heating equipment work simultaneously; the determining module is used for determining the power regulation ratio of each heating module according to the target power of the plurality of adjacent heating modules; and the control module is used for controlling the output power of each heating module according to the power regulation ratio of each heating module so that the plurality of adjacent heating modules work at intervals.
According to the power control device of the electromagnetic heating equipment, the output power of each heating module is controlled according to the power regulation ratio of the corresponding heating module, so that a plurality of adjacent heating modules work at intervals, the working frequency of the plurality of adjacent heating modules is higher than the resonance frequency, the condition that the power tube works in a hard-on state is avoided, the conduction loss of the power tube is reduced, the temperature rise is reduced, and the reliability of a product is improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
fig. 1 is a flow chart of a power control method of an electromagnetic heating apparatus according to an embodiment of the present invention;
fig. 2 is a waveform diagram according to a first embodiment of the present invention;
FIG. 3 is a waveform diagram according to a second embodiment of the present invention;
fig. 4 is a waveform diagram according to a third embodiment of the present invention;
FIG. 5 is a schematic diagram of a power control device according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a power control device and a heating module according to one embodiment of the invention.
Description of the drawings:
a power control device 10; an acquisition module 11; a determination module 12; a control module 13;
an ac power supply 20;
a first heating module 31; a second heating module 32;
a first driving module 41; a second drive module 42;
zero crossing detection module 50.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
An electromagnetic heating apparatus, a power control method thereof, and a power control device 10 according to an embodiment of the present invention are described below with reference to the accompanying drawings.
The plurality of heating modules (the number of heating modules is two or more) of the electromagnetic heating apparatus may correspond to a plurality of heating zones, which may be used for heating of a plurality of appliances to simultaneously perform a plurality of cooking processes. The electromagnetic heating device may be a multi-head electromagnetic oven or the like, and the heating module may include a heating coil or the like.
A power control method of an electromagnetic heating apparatus according to an embodiment of the first aspect of the present invention is described below with reference to fig. 1 to 4.
As shown in fig. 1, the power control method of the electromagnetic heating apparatus includes steps S1 and S2.
Step S1: and when the plurality of adjacent heating modules of the electromagnetic heating equipment are determined to work simultaneously, acquiring the target power of each heating module. In other words, the target power of the plurality of heating modules is obtained while the plurality of appliances are simultaneously heated by the plurality of adjacent heating modules, respectively, to perform the plurality of cooking processes. The target power is the power required by each heating module to perform the corresponding cooking process, and may be, for example, the power manually input by the user or the power corresponding to the cooking function selected by the user.
Step S2: and determining the power modulation ratio of each heating module according to the target power of the plurality of adjacent heating modules, and controlling the output power of the corresponding heating module according to the power modulation ratio of each heating module so that the plurality of adjacent heating modules work at intervals.
The power tube has small loss and low temperature rise in the soft-on state, and is an ideal working state. The power tube is in a hard on state and has large loss and high temperature. If the actual working frequency of some heating modules is lower than the corresponding power resonance parameters of the heating modules and the cookers, the power tube can work in a hard on state, namely in a high-voltage on state, so that the switching loss of the power tube is large, the temperature is increased, and the reliability is reduced.
Therefore, in the embodiment of the invention, the output power of each heating module is controlled according to the power modulation ratio of the corresponding heating module, so that a plurality of adjacent heating modules work at intervals. For example, the plurality of adjacent heating modules may include a first heating module and a second heating module, the second heating module being deactivated when the first heating module is in operation, the first heating module being deactivated when the second heating module is in operation, thereby enabling spaced operation of the first heating module and the second heating module.
Because a plurality of adjacent heating modules work at intervals, the average power of each heating module reaches the corresponding target power, and the actual working frequency of the heating modules during working can be larger than the resonant frequency, thereby preventing the power tube from working in a hard-on state, reducing the switching loss of the power tube, reducing the temperature rise and improving the reliability.
In each cycle period of the operation of the plurality of adjacent heating modules at intervals, the time ratio of the operation of each heating module to the whole cycle period is the power modulation ratio of the heating module. For example, the period of the ac power is T, in the example shown in fig. 2, the cycle period in which the first heating module and the second heating module are operated at intervals is 2T, the time in which the first heating module is operated in each cycle period is T and the duty ratio is 0.5, and the time in which the second heating module is operated in each cycle period is T and the duty ratio is 0.5; in the example shown in fig. 3, the cycle period in which the first heating module and the second heating module are operated at intervals is 2T, the time in which the first heating module is operated in each cycle period is T and the power modulation ratio is 0.5, and the time in which the second heating module is operated in each cycle period is 0.5T and the power modulation ratio is 0.25; in the example shown in fig. 4, the first heating module and the second heating module are operated at intervals of 4T for a cycle period of 2.5T and a power modulation ratio of 0.625 for the first heating module, and 1.5T and a power modulation ratio of 0.375 for the second heating module.
According to the power control method of the electromagnetic heating equipment, the output power of each heating module is controlled according to the power regulation ratio of the corresponding heating module, so that a plurality of adjacent heating modules work at intervals, the working frequency of the plurality of adjacent heating modules is higher than the resonance frequency, the condition that the power tube works in a hard-on state is avoided, the conduction loss of the power tube is reduced, the temperature rise is reduced, and the reliability of products is improved.
According to some embodiments of the present invention, when the plurality of adjacent heating modules are the adjacent first heating module and the adjacent second heating module, determining the power adjustment ratio of each heating module according to the target power of the plurality of adjacent heating modules in step S2 may include:
step S21: determining a first calculation power and a second calculation power according to the sum of the target power of the first heating module and the target power of the second heating module and the rated output power of the electromagnetic heating device when the sum of the target power of the first heating module and the target power of the second heating module is greater than or equal to the minimum output power of the electromagnetic heating device and less than or equal to the rated output power of the electromagnetic heating device;
step S22: the target power of the first heating module is divided by the first calculated power to obtain a power transfer ratio of the first heating module, and the target power of the second heating module is divided by the second calculated power to obtain a power transfer ratio of the second heating module.
Specifically, as shown in fig. 2, the target power of the first heating module is P1, the first calculated power is Pa, the power modulation ratio is K1, the target power of the second heating module is P2, the second calculated power is Pb, the power modulation ratio is K2, the minimum output power of the electromagnetic heating device is Pmin, and the rated output power of the electromagnetic heating device is P0.
When Pmin is less than P1+P2 and less than or equal to P0, pa and Pb are determined according to P1+P2 and P0, wherein P1+P2 and less than or equal to Pa and less than or equal to P0, and P1+P2 and less than or equal to Pb and less than or equal to P0. Power regulating ratio of the first heating module
The power regulation ratio of the second heating module>
In the process of controlling the first heating module and the second heating module to work at intervals, in each cycle period, the first heating module works at the time corresponding to the power regulation ratio K1 with Pa power and does not work at other times, so that the average power of the first heating module in the cycle period is K1×Pa, namely the target power P1; the second heating module works with Pb power for the time corresponding to the power regulation ratio K2 and does not work at other times, so that the average power of the first heating module in the cycle period is K2×Pb, namely the target power P2. Thus, pa is greater than P1, Pb is larger than P2, when the target power is smaller, the output power requirement can be met, the actual working frequency is larger than the resonant frequency, and the power tube is prevented from working in a hard-on state.
Further, in some embodiments, the first calculated power is equal to the second calculated power and is equal to a sum of the target power of the first heating module and the target power of the second heating module. That is, pa=pb=p1+p2. From this first heating module and second heating module's operating frequency equals to avoid multiple frequency mixing together to produce synthetic frequency in the course of the work, avoid synthesizing the difference frequency signal and produce sharp and harsher noise, be favorable to improving user's use experience.
Further, in some embodiments, the duty cycle of the first heating module is the same as the duty cycle of the second heating module. That is, k1=k2. For example, in the example shown in fig. 2, K1 and K2 are both 0.5, the uniformity of heating the cookware by the first heating module and the second heating module respectively is better, and the power control method is simpler.
According to some embodiments of the present invention, when the plurality of adjacent heating modules are the adjacent first heating module and the adjacent second heating module, determining the power adjustment ratio of each heating module according to the target power of the plurality of adjacent heating modules in step S2 may include:
step S23: when the sum of the target power of the first heating module and the target power of the second heating module is smaller than the minimum output power of the electromagnetic heating device, determining third calculation power and fourth calculation power according to the minimum output power of the electromagnetic heating device and the rated output power of the electromagnetic heating device;
step S24: dividing the target power of the first heating module by the third calculated power to obtain a power transfer ratio of the first heating module, and dividing the target power of the second heating module by the fourth calculated power to obtain the power transfer ratio of the second heating module.
Specifically, as shown in fig. 3, the target power of the first heating module is P1, the third calculated power is Pc, the power modulation ratio is K1, the target power of the second heating module is P2, the fourth calculated power is Pd, the power modulation ratio is K2, the minimum output power of the electromagnetic heating device is Pmin, and the rated output power of the electromagnetic heating device is P0.
When P1+P2 is less than Pmin, pc and Pd are determined according to Pmin and P0, wherein Pmin is less than or equal to Pc and less than or equal to P0, and Pmin is less than or equal to Pd and less than or equal to P0. Power regulating ratio of the first heating module
The power regulation ratio of the second heating module>
In the process of controlling the first heating module and the second heating module to work at intervals, in each cycle period, the first heating module works at the time corresponding to the power regulation ratio K1 of Pc power and does not work at other times, so that the average power of the first heating module in the cycle period is K1×Pc, namely the target power P1; the second heating module works with Pd power for the time corresponding to the power regulation ratio K2 and does not work at other times, so that the average power of the first heating module in the cycle period is K2×Pd, namely the target power P2. Therefore, pc is larger than P1, pd is larger than P2, when the target power is smaller, the output power requirement can be met, the actual working frequency is larger than the resonant frequency, and the power tube is prevented from working in a hard-on state.
Further, in some embodiments, the third calculated power is equal to the fourth calculated power and is equal to one-half of the rated output power of the electromagnetic heating device. That is to say,
therefore, lower target power can be realized, and the working frequencies of the first heating module and the second heating module are equal, so that the situation that multiple frequencies are mixed together to generate synthesized frequencies in the working process is avoided, sharp and harsher noise caused by synthesis of difference frequency signals is avoided, and the use experience of a user is improved.
Further, in some embodiments, as shown in fig. 3, the power ratio of the first heating module is greater than the power ratio of the second heating module. That is, K1 > K2. For example, in the example shown in fig. 3, K1 is 0.75 and K2 is 0.25, thereby making the average power of the second heating module smaller and capable of meeting the lower target power demand.
Further, the applicant has found that when the alternating interval of a plurality of adjacent heating modules is long, that is, when the time for which each heating module is stopped is long, a heating uniformity is liable to be poor. Thus, according to some embodiments of the present invention, when the plurality of adjacent heating modules are adjacent first and second heating modules, if it is determined that the interval time between the first and second heating modules is greater than the preset duration, the power ratio of the first heating module and the power ratio of the second heating module are divided, respectively. In other words, the first heating module is operated a plurality of times and the second heating module is operated a plurality of times during each cycle, and the first heating module and the second heating module are not operated at the same time. Here, the preset time period may be flexibly set according to actual situations, for example, the preset time period may be 2T.
For example, in the example shown in fig. 4, the period of the ac power is T, the cycle period in which the first heating module and the second heating module are operated at intervals is 4T, the time in which the first heating module is operated in each cycle period is 2.5T and the power modulation ratio is 0.625, and the time in which the second heating module is operated in each cycle period is 1.5T and the power modulation ratio is 0.375. In each cycle period, the power regulation ratio of the first heating module is divided into 0.375 and 0.25, and the working time is 1.5T and T respectively; the power regulation ratio of the second heating module is divided into 0.125 and 0.25, and the working time is respectively and correspondingly 0.5T and T; during the 0-1.5T time period, the first heating module is operated and the second heating module is not operated; during the 1.5T-2T period, the second heating module is operated and the first heating module is not operated; during the 2T-3T time period, the first heating module is operated and the second heating module is not operated; during the 3T-4T period, the second heating module is active and the first heating module is inactive. Thus, the duration of each time the first and second heating modules are deactivated is shorter in each cycle period, thereby improving the uniformity of heating.
The computer-readable storage medium according to an embodiment of the present invention has stored thereon a power control program of an electromagnetic heating apparatus, which when executed by a processor, implements a power control method of an electromagnetic heating apparatus as in the embodiment of the present invention. Because the power control method of the electromagnetic heating device according to the embodiment of the present invention has the above beneficial technical effects, the computer readable storage medium according to the embodiment of the present invention implements the power control method described in the above embodiment when the stored power control program is executed by the processor, and controls the output power of each heating module according to the power regulation ratio of the corresponding heating module, so that the plurality of adjacent heating modules work at intervals, so that the working frequency of the plurality of adjacent heating modules is greater than the resonant frequency, and the situation that the power tube works in the hard-on state does not occur, thereby reducing the conduction loss of the power tube, reducing the temperature rise, and improving the reliability of the product.
The electromagnetic heating device according to the embodiment of the invention comprises a memory, a processor and a power control program of the electromagnetic heating device which is stored in the memory and can run on the processor, and when the processor executes the power control program, the power control method of the electromagnetic heating device according to the embodiment of the invention is realized. Because the power control method of the electromagnetic heating device according to the embodiment of the invention has the beneficial technical effects, the electromagnetic heating device according to the embodiment of the invention controls the output power of the corresponding heating module according to the power regulation ratio of each heating module, so that a plurality of adjacent heating modules work at intervals, the working frequency of the plurality of adjacent heating modules is higher than the resonant frequency, the condition that the power tube works in a hard-on state can not occur, the conduction loss of the power tube is reduced, the temperature rise is reduced, and the reliability of the product is improved.
As shown in fig. 5, a power control apparatus 10 of an electromagnetic heating device according to an embodiment of the present invention includes: an acquisition module 11, a determination module 12 and a control module 13.
The acquiring module 11 is configured to acquire a target power of each heating module when a plurality of adjacent heating modules of the electromagnetic heating apparatus operate simultaneously. The determination module 12 is configured to determine a power modulation ratio for each heating module based on target power for a plurality of adjacent heating modules. The control module 13 is used for controlling the output power of each heating module according to the power modulation ratio of the corresponding heating module so as to enable a plurality of adjacent heating modules to work at intervals.
The control module 13 controls the output power of each heating module according to the power regulation ratio of the corresponding heating module, so that a plurality of adjacent heating modules work at intervals. For example, the plurality of adjacent heating modules may include a first heating module 31 and a second heating module 32, and the control module 13 controls the first heating module 31 to operate while the second heating module 32 is stopped, and the control module 13 controls the second heating module 32 to operate while the first heating module 31 is stopped, thereby realizing the interval operation of the first heating module 31 and the second heating module 32.
Because a plurality of adjacent heating modules work at intervals, the average power of each heating module reaches the corresponding target power, and the actual working frequency of the heating modules during working can be larger than the resonant frequency, thereby preventing the power tube from working in a hard-on state, reducing the switching loss of the power tube, reducing the temperature rise and improving the reliability.
In each cycle period in which the control module 13 controls the plurality of adjacent heating modules to work at intervals, the time ratio of each heating module to work in the whole cycle period is the power modulation ratio of the heating module. For example, the ac power supply 20 has a period of T, and in the example shown in fig. 2, the first heating module 31 and the second heating module 32 are operated at intervals of 2T, the first heating module 31 is operated for a period of T and the power modulation ratio is 0.5 in each cycle, and the second heating module 32 is operated for a period of T and the power modulation ratio is 0.5 in each cycle; in the example shown in fig. 3, the cycle period in which the first heating module 31 and the second heating module 32 are operated at intervals is 2T, the time in which the first heating module 31 is operated in each cycle period is T and the duty ratio is 0.5, and the time in which the second heating module 32 is operated in each cycle period is 0.5T and the duty ratio is 0.25; in the example shown in fig. 4, the cycle period in which the first heating module 31 and the second heating module 32 are operated at intervals is 4T, the time in which the first heating module 31 is operated in each cycle period is 2.5T and the power modulation ratio is 0.625, and the time in which the second heating module 32 is operated in each cycle period is 1.5T and the power modulation ratio is 0.375.
According to the power control device 10 of the electromagnetic heating equipment, the output power of each heating module is controlled according to the power regulation ratio of the corresponding heating module, so that a plurality of adjacent heating modules work at intervals, the working frequency of the plurality of adjacent heating modules is higher than the resonance frequency, the condition that the power tube works in a hard-on state is avoided, the conduction loss of the power tube is reduced, the temperature rise is reduced, and the reliability of the electromagnetic heating equipment is improved.
In the embodiment of the present invention, the method for determining the power adjustment ratio of each heating module by the determining module 12 and the method for controlling the output power of the corresponding heating module by the control module 13 may refer to the power control method of the electromagnetic heating device in the embodiment of the present invention, which is not described herein.
The power control apparatus 10 and the power control method of the electromagnetic heating device according to one embodiment of the present invention will be described in detail with reference to the accompanying drawings, it being understood that the following description is merely illustrative and is not to be construed as limiting the invention.
In one embodiment of the present invention, as shown in fig. 6, the power control device 10 of the electromagnetic heating apparatus is connected to the first heating module 31 through the first driving module 41 and connected to the second heating module 32 through the second driving module 42 to output PWM (Pulse Width Modulation ) signals to control the first heating module 31 and the second heating module 32. The first heating module 31 includes a first upper bridge power tube, a first lower bridge power tube, a first heating coil, and a first resonant capacitor pair; the second heating module 32 includes a second upper bridge power tube, a second lower bridge power tube, a second heating coil, and a second resonant capacitor pair. The power control device 10 of the electromagnetic heating equipment outputs PWM signals to the driving module, the driving module outputs complementary PWM signals to control the upper bridge power tube and the lower bridge power tube to be alternately conducted in turn, the heating coil is controlled to output alternating current, an alternating magnetic field is generated, the alternating magnetic field enables a metal pot placed on the heating coil to induce alternating eddy currents, and the alternating eddy currents enable the pot to heat, so that food can be heated.
The zero-volt signal is generated by the zero-crossing detection module 50 at the moment that the ac power supply 20 is at the zero-crossing point (is zero volt) and is input to the power control device 10, and the power control device 10 can count the zero-crossing point after detecting the zero-volt signal so as to judge whether the first heating module 31 and the second heating module 32 switch the working state according to the number of the zero-crossing points. For example, in the example shown in fig. 2, zero-crossing points are cleared at the beginning of each cycle period, and the first heating module 31 is controlled to operate and the second heating module 32 is controlled to be not operated, and when zero-crossing points are 2, the first heating module 31 is controlled to stop operating and the second heating module 32 is controlled to operate, and when zero-crossing points are 4, the first heating module 31 is controlled to operate, the second heating module 32 is controlled to stop operating and zero-crossing points are cleared, each time zero-crossing point of a zero-volt signal is detected to be plus one.
Other constructions and operations of electromagnetic heating devices according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and additional implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order from that shown or discussed, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.
Logic and/or steps represented in the flowcharts or otherwise described herein, e.g., a ordered listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.
It is to be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. As with the other embodiments, if implemented in hardware, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.
The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like. While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (10)
1. A power control method of an electromagnetic heating apparatus, comprising the steps of:
when a plurality of adjacent heating modules of the electromagnetic heating equipment are determined to work simultaneously, acquiring the target power of each heating module;
determining the power modulation ratio of each heating module according to the target power of the plurality of adjacent heating modules, and controlling the output power of the corresponding heating module according to the power modulation ratio of each heating module so that the plurality of adjacent heating modules work at intervals;
when the plurality of adjacent heating modules are adjacent first heating modules and second heating modules, determining the power modulation ratio of each heating module according to the target power of the plurality of adjacent heating modules, including:
determining a first calculation power and a second calculation power according to the sum of the target power of the first heating module and the target power of the second heating module and the rated output power of the electromagnetic heating device when the sum of the target power of the first heating module and the target power of the second heating module is greater than or equal to the minimum output power of the electromagnetic heating device and less than or equal to the rated output power of the electromagnetic heating device;
dividing the target power of the first heating module by the first calculated power to obtain a power transfer ratio of the first heating module, and dividing the target power of the second heating module by the second calculated power to obtain the power transfer ratio of the second heating module.
2. The power control method of an electromagnetic heating apparatus according to claim 1, wherein the first calculated power is equal to the second calculated power and is equal to a sum of a target power of the first heating module and a target power of the second heating module.
3. The power control method of an electromagnetic heating apparatus according to claim 1 or 2, wherein a duty ratio of the first heating module is the same as a duty ratio of the second heating module.
4. The method of power control of an electromagnetic heating apparatus of claim 1, wherein when the plurality of adjacent heating modules are adjacent first and second heating modules, determining the power adjustment ratio of each heating module according to the target power of the plurality of adjacent heating modules comprises:
when the sum of the target power of the first heating module and the target power of the second heating module is determined to be smaller than the minimum output power of the electromagnetic heating device, determining third calculation power and fourth calculation power according to the minimum output power of the electromagnetic heating device and the rated output power of the electromagnetic heating device;
dividing the target power of the first heating module by the third calculated power to obtain a power transfer ratio of the first heating module, and dividing the target power of the second heating module by the fourth calculated power to obtain the power transfer ratio of the second heating module.
5. The power control method of an electromagnetic heating apparatus according to claim 4, wherein the third calculated power is equal to the fourth calculated power and is equal to one half of a rated output power of the electromagnetic heating apparatus.
6. The power control method of an electromagnetic heating apparatus according to claim 4 or 5, wherein a modulation ratio of the first heating module is greater than a modulation ratio of the second heating module.
7. The method of controlling power of an electromagnetic heating apparatus according to claim 1, wherein when the plurality of adjacent heating modules are adjacent first and second heating modules, if it is determined that an interval time between the first and second heating modules is longer than a preset period of time, the power adjustment ratio of the first heating module and the power adjustment ratio of the second heating module are divided, respectively.
8. A computer-readable storage medium, characterized in that a power control program of an electromagnetic heating apparatus is stored thereon, which power control program, when executed by a processor, implements the power control method of an electromagnetic heating apparatus as claimed in any one of claims 1-7.
9. An electromagnetic heating device comprising a memory, a processor and a power control program of the electromagnetic heating device stored on the memory and executable on the processor, the processor implementing the power control method of the electromagnetic heating device according to any one of claims 1-7 when executing the power control program.
10. A power control apparatus of an electromagnetic heating device, characterized by comprising an electromagnetic heating device as claimed in claim 9:
the acquisition module is used for acquiring the target power of each heating module when a plurality of adjacent heating modules of the electromagnetic heating equipment work simultaneously;
the determining module is used for determining the power regulation ratio of each heating module according to the target power of the plurality of adjacent heating modules;
and the control module is used for controlling the output power of each heating module according to the power regulation ratio of each heating module so that the plurality of adjacent heating modules work at intervals.
Priority Applications (2)
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| CN202011589019.6A CN114698168B (en) | 2020-12-29 | 2020-12-29 | Electromagnetic heating equipment, power control method and power control device thereof |
| PCT/CN2021/140570 WO2022143351A1 (en) | 2020-12-29 | 2021-12-22 | Electromagnetic heating device, and power control method and power control apparatus therefor |
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| CN202011589019.6A CN114698168B (en) | 2020-12-29 | 2020-12-29 | Electromagnetic heating equipment, power control method and power control device thereof |
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| JP4854567B2 (en) * | 2007-03-30 | 2012-01-18 | 三井造船株式会社 | Induction heating method and induction heating apparatus |
| JP5089490B2 (en) * | 2008-05-29 | 2012-12-05 | 三菱電機株式会社 | Induction heating cooker |
| CN103105875B (en) * | 2011-11-15 | 2016-08-17 | 美的集团股份有限公司 | The control method of pancake cooked by a kind of electric pressure cooking saucepan |
| CN105982510A (en) * | 2015-02-06 | 2016-10-05 | 飞利浦（嘉兴）健康科技有限公司 | Electromagnetic heating kitchenware as well as controller and control method thereof |
| CN106175403B (en) * | 2015-05-05 | 2018-10-16 | 佛山市顺德区美的电热电器制造有限公司 | Method for heating and controlling, heating control apparatus and cooking apparatus |
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| WO2022143351A1 (en) | 2022-07-07 |
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