CN109874192B - Electromagnetic heating circuit, heating platform and appliance identification method - Google Patents
Electromagnetic heating circuit, heating platform and appliance identification method Download PDFInfo
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- CN109874192B CN109874192B CN201711271173.7A CN201711271173A CN109874192B CN 109874192 B CN109874192 B CN 109874192B CN 201711271173 A CN201711271173 A CN 201711271173A CN 109874192 B CN109874192 B CN 109874192B
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Abstract
The invention provides an electromagnetic heating circuit, a heating platform and an appliance identification method, wherein the electromagnetic heating circuit comprises the following components: the device comprises a power supply module, an IGBT module, a control module, a heating module, a voltage sampling module and a current sampling module; the source electrode of the IGBT module is connected with the power supply module; the control module is connected with the grid electrode of the IGBT module so as to control the on-off of the IGBT module; a heating module for heating the appliance; one end of the voltage sampling module is connected with the drain electrode of the IGBT module, and the other end of the voltage sampling module is connected with the control module so as to send the acquired voltage value to the control module; one end of the current sampling module is connected with the source electrode of the IGBT module, and the other end of the current sampling module is connected with the control module so as to send the acquired current value to the control module; the control module calculates the power consumed by the appliance according to the voltage value and the current value, and then identifies the type of the appliance according to the power.
Description
Technical Field
The invention relates to the field of cooking appliances, in particular to an electromagnetic heating circuit, a heating platform, an appliance identification method, computer equipment and a computer readable storage medium.
Background
At present, because various types of cookers exist in the market, each cooker can be coupled with a coil to generate different inductance and impedance, so that the resonance parameters of the induction cooker are changed, and the working state of the induction cooker is influenced; therefore, the pan can all be equipped with when general electromagnetism stove leaves the factory, and electromagnetism stove resonance parameter etc. all adjusts according to the pan, if change other pans on the market, can lead to resonance parameter to mismatch, influences the circuit performance, shortens product life.
In the prior art, the processing mode of the problems is to distinguish different cookers by judging the type of the cooker and match the different cookers with different powers; however, in the related art, the frequency determination method is mainly used for determining the cookware, and when the frequencies of two cookware are close to each other, the method is prone to misdetermination.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, a first aspect of the invention proposes an electromagnetic heating circuit.
A second aspect of the invention provides a heated platen.
A third aspect of the invention provides a device identification method.
A fourth aspect of the invention provides a computer device.
A fifth aspect of the invention proposes a computer-readable storage medium.
In view of this, a first aspect of the present invention provides an electromagnetic heating circuit, comprising: the device comprises a power supply module, an Insulated Gate Bipolar Transistor (IGBT) module, a control module, a heating module, a voltage sampling module and a current sampling module, wherein the power supply module is provided with a safety device; the source electrode of the IGBT module is connected with the power supply module; the control module is connected with the grid electrode of the IGBT module so as to control the on-off of the IGBT module; one end of the heating module is connected with the drain electrode of the IGBT module, and the other end of the heating module is connected with the power supply module and used for heating the appliance; one end of the voltage sampling module is connected with the drain electrode of the IGBT module, and the other end of the voltage sampling module is connected with the control module so as to send the acquired voltage value to the control module; one end of the current sampling module is connected with the source electrode of the IGBT module, and the other end of the current sampling module is connected with the control module so as to send the acquired current value to the control module; the control module calculates the power consumed by the appliance according to the voltage value and the current value, and then identifies the type of the appliance according to the power.
In the technical scheme, the electromagnetic heating circuit comprises a power supply module, wherein the power supply module is provided with a safety device, an IGBT module, a control module, a heating module, a voltage sampling module and a current sampling module; the power supply module supplies power to the electromagnetic heating circuit; the safety device is used for protecting the circuit; the grid of the IGBT module is connected with the control module, and the control module controls power by controlling the IGBT module to change the on-off state and the on-time of each time; one end of the heating module is connected with a drain electrode of the IGBT module, the other end of the heating module is connected with the power supply module, and the oscillation voltage is generated through continuous charging and discharging so as to heat the appliance; the voltage sampling module is connected with the drain electrode of the IGBT and the control module, reads the voltage value of the IGBT circuit and sends the voltage value to the control module; the current sampling module is connected with the source electrode of the IGBT module and the control module, reads the current value of the IGBT circuit and sends the current value to the control module; the control module reads the current value and the voltage value of the IGBT module through the voltage acquisition module and the current acquisition module, and calculates the power consumed by the appliance. Because different appliances have different impedances and consume different powers, the type of the appliance is more accurately judged according to the calculated power consumed by the appliance, and the selection range of the user on the appliance is greatly expanded; data such as power parameters of the induction cooker and the like are adjusted according to the type of the appliance, so that extra loss is reduced, and the service life of the heating platform is prolonged; meanwhile, the performance of the electromagnetic heating circuit is improved, the energy efficiency ratio of the electromagnetic heating circuit is improved, the working efficiency of a product is further improved, and the power supply module is provided with a safety device, so that the electromagnetic heating circuit can be effectively protected from being damaged when over-current is generated in commercial power or the electromagnetic heating circuit is struck by lightning.
In addition, the electromagnetic heating circuit in the above technical solution provided by the present invention may further have the following additional technical features:
in the above technical solution, preferably, the electromagnetic heating circuit further includes a voltage sampling module including: a first capacitor and voltage analog-to-digital conversion device; one end of the first capacitor is connected with the drain electrode of the IGBT module, the other end of the first capacitor is grounded, and the voltage analog-digital conversion device is connected with the first capacitor so as to send the voltage value of the first capacitor to the control module.
In the technical scheme, the first capacitor is connected with the drain electrode of the IGBT module, and the other end of the first capacitor is grounded, namely the high potential of the first capacitor is equal to the potential of the drain electrode of the IGBT module after being charged, namely the voltage value of the first capacitor after being charged is the voltage value to ground of the drain electrode of the IGBT module, namely the voltage value of the IGBT module; the voltage analog-digital conversion device is connected with the first capacitor, converts the read voltage value of the first capacitor, namely the voltage value of the IGBT module into a digital signal and then sends the digital signal to the control module. The first capacitor is used for collecting the voltage value charged by the first capacitor instead of directly collecting the voltage value of the IGBT module, so that the situation that the collecting device is damaged by directly passing strong current and strong voltage for a long time can be avoided. The collected voltage analog signals can be converted into digital signals through the voltage analog-digital conversion device, and then the digital signals can be received and processed by a CPU of the control module.
In any of the above technical solutions, preferably, the voltage sampling module includes: and the first switch is connected between the drain electrode of the IGBT module and the first capacitor in series.
In the technical scheme, the first switch is connected in series between the drain electrode of the IGBT module and the first capacitor, the first switch is switched on when the voltage of the IGBT module reaches the highest point, the first capacitor is charged at the moment, and the voltage value of the first capacitor is the peak voltage at the moment. The first switch is switched on when the voltage of the IGBT is at the highest point, so that the voltage charged by the first capacitor can be the peak voltage, errors are avoided, and the acquisition device can be prevented from being damaged by direct passing of strong current and strong voltage for a long time.
In any of the above technical solutions, preferably, the voltage sampling module further includes: the first switch is connected with one end of the first capacitor, and the other end of the first resistor is connected with the other end of the first capacitor.
In the technical scheme, the second switch is connected in series with the second resistor and then is connected in parallel with the first capacitor to be grounded, and after the voltage analog-digital conversion device finishes sampling the voltage value of the first capacitor, the second switch is switched on to discharge the first capacitor. The first capacitor is discharged through the second switch, so that the first capacitor can be restored to the initial state, the long-time charging and life-reducing of the first capacitor are avoided, and the acquisition device can be prevented from being damaged through strong current and strong voltage directly for a long time. The second resistor is grounded after being connected with the second switch in series, so that the phenomenon that the first capacitor is short-circuited with the ground during discharging to generate overlarge instantaneous current can be avoided, and the safety of the circuit is protected.
In any of the above technical solutions, preferably, the current sampling module includes: a second capacitor and current analog-to-digital conversion device; one end of the second capacitor is connected with the source electrode of the IGBT module, and the other end of the second capacitor is grounded; and the current analog-to-digital conversion device is connected with the second capacitor so as to send the current value of the second capacitor during charging to the control module.
In the technical scheme, the second capacitor is connected with the source electrode of the IGBT module, and the other end of the second capacitor is grounded, namely the current value of the second capacitor during charging is the current value of the source electrode of the IBGT module, namely the current value of the IGBT module; the current analog-to-digital conversion device is connected with the second capacitor, and converts the read current of the second capacitor during charging, namely the current value of the IGBT into a digital signal and then sends the digital signal to the control module. The second capacitor is introduced to collect the charged current value of the second capacitor instead of directly collecting the current value of the IGBT module, so that the situation that the collecting device is damaged by directly passing strong current and strong voltage for a long time can be avoided. The current analog signal collected can be converted into a digital signal through the current analog-to-digital conversion device, and then can be received and processed by a CPU of the control module.
In any of the above technical solutions, preferably, the current sampling module further includes: and the third switch is connected between the second capacitor and the source electrode of the IGBT module in series.
In the technical scheme, the third switch is connected in series between the source of the IBGT module and the second capacitor, and is turned on when the current passing through the first resistor reaches the highest point to charge the second capacitor, and the current value of the charge of the second capacitor is the peak current. The third switch is switched on when the IGBT current is at the highest point, so that the current charged by the second capacitor can be the peak voltage, errors are avoided, and the acquisition device can be prevented from being damaged by the direct passing of strong current and strong voltage for a long time.
In any of the above technical solutions, preferably, the current sampling module further includes: one end of the third resistor is connected with one end of the second capacitor through the fourth switch, and the other end of the third resistor is connected with the other end of the second capacitor.
In the technical scheme, the fourth switch is connected in series with the third resistor and then is grounded in parallel with the second capacitor, and after the current analog-to-digital conversion device finishes sampling the current value when the second capacitor is charged, the fourth switch is turned on to discharge the second capacitor. The second capacitor is discharged through the fourth switch, so that the second capacitor can be restored to the initial state, the long-time charging and life reduction of the second capacitor are avoided, and the acquisition device can be prevented from being damaged by the strong current and the strong voltage directly for a long time. The third resistor and the fourth switch are grounded after being connected in series, so that the phenomenon that the second capacitor is short-circuited with the ground during discharging to generate overlarge instantaneous current can be avoided, and the safety of the circuit is protected.
In any of the above technical solutions, preferably, the heating module includes: one end of the coil is connected with the drain electrode of the IGBT module, and the other end of the coil is connected with the power supply module; the third capacitor is connected in parallel with the coil.
In the technical scheme, one end of the coil is connected with a drain electrode of the IGBT module, the other end of the coil is connected with the power supply module, when the IGBT module is switched on, the coil is charged, when the IGBT module is switched off, oscillation is generated between the coil and the third capacitor, and the appliance is heated through oscillation voltage; the continuous heating of the appliance can be realized through the continuously repeated process of changing charging and oscillating.
In any one of the above technical solutions, preferably, the electromagnetic heating circuit further includes: and one end of the first resistor is connected with the power supply module, and the other end of the first resistor is connected with the source electrode of the IGBT module.
In the technical scheme, the surge in the circuit is absorbed by arranging the first resistor, so that the operation of the circuit is more stable, and the optimization of the electromagnetic heating circuit is realized.
In any of the above technical solutions, preferably, the power supply module includes: the voltage dependent resistor is connected with the connector; the fourth capacitor is connected with the piezoresistor in parallel; the input end of the power supply conversion device is connected with the piezoresistor in parallel, the anode of the output end of the power supply conversion device is connected with the heating module, and the cathode of the output end of the power supply conversion device is connected with one end of the first resistor.
In the technical scheme, the socket connector is connected with a mains supply, the mains supply is connected to the power converter through the socket connector, the piezoresistor is connected with the socket connector after being connected with the fourth capacitor in parallel, and the power converter converts alternating current of the mains supply into direct current to be supplied to the heating module so as to supply power to the heating module. The piezoresistor is connected with the connector, and voltage clamping is carried out under the condition that the mains supply fluctuation generates overvoltage or lightning stroke, so that redundant current can be absorbed to protect the circuit device; the fourth capacitor is connected with the socket connector after being connected with the piezoresistor in parallel, so that low-frequency signals in the commercial power can be filtered, and clutter can be removed; the power conversion device converts the alternating current after the impurity removal into direct current which can be used by the heating module, and the work of the heating module is ensured.
A second aspect of the present invention provides a heating platform, comprising an electromagnetic heating circuit as described in any one of the above claims, so that the heating platform comprises all the benefits of the electromagnetic heating circuit as described in any one of the above claims.
A third aspect of the invention provides a device identification method for controlling the type of device of an electromagnetic heating circuit as in any one of the first aspect claims, or a heating platform as in the second aspect, comprising: collecting peak currents of at least two oscillation periods; collecting peak voltages of at least two oscillation periods; calculating the power consumed by the appliance according to the peak current and the peak voltage; the type of appliance is identified based on the power.
In the technical scheme, the peak current and the peak voltage of at least two oscillation periods are respectively collected, the power consumed by the current appliance can be obtained through twice calculation, and the collected data can be compared by three or more multiple sampling so as to obtain more accurate data. The type of the appliance can be accurately judged according to the calculated power consumed by the appliance, so that the selection range of the appliance by a user is greatly expanded, data such as power parameters of the induction cooker and the like are adjusted according to the type of the appliance, the extra loss is reduced, and the service life of a heating platform is prolonged; meanwhile, the performance of the electromagnetic heating circuit is improved, the energy efficiency ratio of the electromagnetic heating circuit is improved, and the working efficiency of the product is further improved.
In the above technical solution, preferably, the collecting peak currents of at least two oscillation periods specifically includes: collecting a first peak current of a heating device in a charging process in a first oscillation period; collecting a second peak current of the heating device in the charging process in a second oscillation period; the collecting of the peak voltages of at least two oscillation periods specifically comprises: collecting a first peak voltage of a heating device in a discharging process in a first oscillation period; and collecting a second peak voltage of the heating device in the discharging process in the second oscillation period.
In the technical scheme, at least two oscillation periods, namely a first peak current and a second peak current, a first peak voltage and a second peak voltage of a first oscillation period and a second oscillation period are acquired, the power consumed by the current appliance can be obtained through twice calculation, and three or more multiple samples can more accurately acquire data samples, so that inaccurate sampling caused by power fluctuation is avoided.
In any of the above technical solutions, preferably, the collecting peak currents of at least two oscillation periods specifically includes: in any oscillation period of at least two oscillation periods, judging whether the current value of the heating device in the charging process reaches a peak value; when the judgment result is yes, closing the third switch; collecting peak current; the collecting of the peak voltages of at least two oscillation periods specifically comprises: in any oscillation period of at least two oscillation periods, judging whether the voltage value of the heating device in the discharging process reaches a peak value; when the judgment result is yes, closing the first switch; the peak voltage is collected.
In the scheme, in any oscillation period of at least two oscillation periods, when the current value of the heating device in the charging process is judged to reach the peak value at the moment, the third switch is closed to charge the second capacitor, and the peak current of the second capacitor is collected at the moment; in any oscillation period of the at least two oscillation periods, when the current value of the heating device in the discharging process is judged to reach the peak value, the first switch is closed, the first capacitor is charged, and the peak voltage of the first capacitor is collected at the moment. The peak voltage of the first capacitor and the peak current of the second capacitor are collected by introducing the first capacitor and the second capacitor, so that the situation that the collecting device is damaged by directly passing strong current and strong voltage for a long time can be avoided. When the current of the heating device reaches the peak value, the third switch is closed, so that the second capacitor is charged and the peak current is collected, the charging current of the second capacitor can be ensured to be the peak current, the sampling accuracy is improved, and the current collecting device is prevented from being damaged by long-time direct passing of strong current and strong voltage; the first switch is closed when the voltage of the heating device reaches the peak value, so that the first capacitor is charged and the peak voltage is collected, the charging voltage of the first capacitor can be ensured to be the peak voltage, the sampling accuracy is improved, and the voltage collecting device is prevented from being damaged by direct passing of strong current and strong voltage for a long time.
In any of the above technical solutions, preferably, after the peak current is collected, the appliance identification method further includes: closing the fourth switch to discharge the second capacitor; after collecting the peak voltage, the appliance identification method further includes: the second switch is closed to discharge the first capacitor.
In the technical scheme, after the peak current is collected, the fourth switch is closed to discharge the second capacitor; after the peak voltage is collected, the second switch is closed to discharge the first capacitor; the first capacitor and the second capacitor return to the initial state after discharging, the service life of the first capacitor and the second capacitor is prolonged, and the acquisition device is prevented from being damaged by strong current and strong voltage for a long time. The second resistor is grounded after being connected with the second switch in series, and the third resistor is grounded after being connected with the fourth switch in series, so that the phenomenon that the first capacitor and the second capacitor are short-circuited with the ground during discharging to generate overlarge instantaneous current can be avoided, and the safety of the circuit is protected.
In any of the above technical solutions, preferably, identifying the type of the appliance according to the power specifically includes: calculating the coupling impedance of the appliance and the heating device according to the power; the type of appliance is identified based on the coupling impedance.
In the technical scheme, the power consumption is calculated according to the collected peak current and peak voltage, and different coupling impedances of different appliances consume different powers, so that the coupling impedance of the appliance and the heating device can be calculated according to the power, the type of the appliance can be judged according to the calculated coupling impedance, the type of the appliance can be judged more accurately, and the selection range of a user on the appliance is greatly expanded.
A fourth aspect of the present invention provides a computer device, including a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the appliance identification method according to any one of the above-mentioned technical solutions when executing the computer program, and therefore, the computer device includes all the advantages of the appliance identification method according to any one of the above-mentioned technical solutions.
A fifth aspect of the present invention provides a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the appliance identification method according to any of the above-mentioned aspects, and therefore, includes all the advantageous effects of the appliance identification method according to any of the above-mentioned aspects.
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 above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 shows a schematic structural diagram of an electromagnetic heating circuit according to one embodiment of the present invention;
FIG. 2 shows a schematic diagram of a voltage peaking circuit, according to one embodiment of the present invention;
FIG. 3 illustrates an IGBT switching current voltage waveform diagram according to an embodiment of the present invention;
FIG. 4 shows a schematic diagram of a current peaking circuit, according to an embodiment of the present invention;
FIG. 5 shows a flow of an appliance identification method according to an embodiment of the invention;
FIG. 6 shows a flow diagram of an appliance identification method according to another embodiment of the invention;
FIG. 7 shows a flow chart of an appliance identification method according to yet another embodiment of the invention;
FIG. 8 shows a flow chart of an appliance identification method according to yet another embodiment of the invention;
FIG. 9 shows a flow chart of an appliance identification method according to yet another embodiment of the invention;
wherein, the correspondence between the reference numbers and the part names in fig. 1 to 4 is:
1 an electromagnetic heating circuit; 101 a power supply module; 1011 connector; 1012 a voltage dependent resistor; 1013 a fourth capacitance; 1014 power conversion means; 1015 a safety device; 102 an IGBT module; 103 heating the module; 1031 coil; 1032 a third capacitance; 104 a voltage sampling module; 1041 a first capacitor; 1042 a first switch; 1043 a second switch; 1044 a second resistance; 1045 voltage analog-to-digital conversion device; 105 a current sampling module; 1051 a second capacitor; 1052 a third switch; 1053 a fourth switch; 1054 a third resistor; 1055 current analog-to-digital conversion means; 106 a first resistance; 107 control the module.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
An electromagnetic heating circuit, a heating platform, a method of appliance identification, a computer device and a computer readable storage medium according to some embodiments of the present invention are described below with reference to fig. 1 to 9.
As shown in fig. 1, in an electromagnetic heating circuit 1 provided in an embodiment of the first aspect of the present invention, a power supply module 101 supplies power to the electromagnetic heating circuit; the power supply module 101 is provided with a safety device 1015; the grid of the IGBT module 102 is connected with a control module 107, and the control module 107 controls power by controlling the IGBT module 102 to change on and off states and the time of each on; one end of the heating module 103 is connected with the drain of the IGBT module 102, and the other end is connected with the power supply module 101, and the oscillating voltage is generated by continuous charging and discharging so as to heat the appliance; the voltage sampling module 104 is connected with the drain of the IGBT module 102 and the control module 107, reads the voltage value of the IGBT circuit and sends the voltage value to the control module 102; the current sampling module 105 is connected with the source of the IGBT module 102 and the control module 107, reads the current value of the IGBT circuit and sends the current value to the control module 102; the control module 107 reads the current value and the voltage value of the IGBT module 102 through the voltage acquisition module 104 and the current acquisition module 105, and calculates the power consumed by the device accordingly.
In this embodiment, the electromagnetic heating circuit 1, the current sampling module 105 and the voltage sampling module 104 may sample the current and voltage values of the IGBT module 102, and the control module 107 may calculate the power currently consumed by the appliance from the current and voltage values. Because different appliances have different impedances, the consumed power is different, and the type of the appliance can be more accurately judged according to the calculated power consumed by the appliance, so that the selection range of the user on the appliance is greatly expanded; data such as power parameters of the induction cooker and the like are adjusted according to the type of the appliance, so that extra loss is reduced, and the service life of the heating platform is prolonged; meanwhile, the performance of the electromagnetic heating circuit is improved, the energy efficiency ratio of the electromagnetic heating circuit is improved, the working efficiency of a product is further improved, and due to the fact that the power supply module 101 is provided with the safety device 1015, the electromagnetic heating circuit 1 can be effectively protected from being damaged when overcurrent is generated in commercial power or when the commercial power is struck by lightning.
In one embodiment of the present invention, preferably, as shown in fig. 1, the voltage sampling module 104 includes a first capacitor 1041; a first switch 1042; a second switch 1043; a second resistor 1044; a voltage analog-to-digital conversion device 1045.
In this embodiment, the first capacitor 1041 is connected to the drain of the IGBT module 102, and the other end is grounded, that is, the high potential of the first capacitor 1041 is equal to the drain potential of the IGBT module 102 after charging, that is, the voltage value of the charged first capacitor 1041 is the voltage value to ground of the drain of the IGBT module 102, that is, the voltage value of the IGBT module 102; the voltage analog-to-digital conversion device 1045 is connected to the first capacitor 1041, and reads a voltage value of the first capacitor 1041, that is, a voltage value of the IGBT module 102, and then sends the voltage value to the control module 107. The first capacitor 1041 is introduced to collect the voltage value charged by the first capacitor 1041 instead of directly collecting the voltage value of the IGBT module 102, so that the situation that the collecting device is damaged by directly passing strong current and strong voltage for a long time can be avoided. The collected voltage analog signal can be converted into a digital signal by the voltage analog-to-digital conversion device 1045, and then can be received and processed by the CPU of the control module 107.
In an embodiment of the present invention, preferably, as shown in fig. 1 to fig. 3, the voltage sampling module 104 circuit, i.e., the peak value obtaining circuit shown in fig. 2, further includes a first switch 1042, and the first switch 1042 is connected in series between the drain of the IGBT module 102 and the first capacitor 1041.
In this embodiment, the first switch 1042 is connected in series between the drain of the IGBT module 102 and the first capacitor 1041, and as shown in fig. 3, is turned on when the voltage of the IGBT module 102 is at the highest point B, at this time, the first capacitor 1041 is charged, and at this time, the voltage value of the first capacitor 1041 is the peak voltage. The first switch 1042 is turned on when the voltage of the IGBT is at the highest point, so that the voltage charged by the first capacitor 1041 is the peak voltage, which avoids errors, and also avoids the acquisition device from being damaged by a strong current and a strong voltage directly for a long time.
In an embodiment of the present invention, preferably, as shown in fig. 1 and fig. 2, the voltage sampling module 104 further includes: a second switch 1043 and a second resistor 1044, one end of the second resistor 1044 is connected to one end of the first capacitor 1041 through the second switch 1043, and the other end is connected to the other end of the first capacitor 1041.
In this embodiment, the second switch 1043 is connected in series with the second resistor 1044 and then grounded in parallel with the first capacitor 1041, and after the voltage analog-to-digital conversion device 1045 sends the sampling of the voltage value of the first capacitor 1041, the second switch 1043 is turned on, so that the first capacitor 1041 is discharged. The first capacitor 1041 is discharged through the second switch 1043, so that the first capacitor 1041 can be restored to an initial state, the long-time charging and life-reducing of the first capacitor 1041 are avoided, and the acquisition device can be prevented from being damaged by a strong current and a strong voltage directly for a long time. The second resistor 1044 is grounded after being connected in series with the second switch 1043, so that the first capacitor 1041 can be prevented from being short-circuited with the ground during discharging, and excessive instantaneous current cannot be generated, thereby protecting the safety of the circuit.
In an embodiment of the present invention, preferably, as shown in fig. 1 and 4, the current sampling module 105 further includes: a second capacitor 1051 and a current analog-to-digital conversion device 1055; one end of the second capacitor 1051 is connected with the source of the IGBT module 102, and the other end is grounded; the current analog-to-digital conversion device 1055 is connected to the second capacitor 1051 to send the current value of the second capacitor 1051 during charging to the control module 107.
In this embodiment, the second capacitor 1051 is connected to the source of the IGBT module 102, and the other end is grounded, that is, the current value of the second capacitor 1051 during charging is the current value of the source of the IBGT module 102, that is, the current value of the IGBT module 102; the current analog-to-digital conversion device 1055 is connected to the second capacitor 1051, and reads the current of the second capacitor 1051 during charging, that is, the current value of the IGBT, and sends the current value to the control module 107. The second capacitor 1051 is introduced to collect the charged current value of the second capacitor instead of directly collecting the current value of the IGBT module 102, so that the situation that the collecting device is damaged by directly passing strong current and strong voltage for a long time can be avoided. The current analog-to-digital conversion device 1055 can convert the collected current analog signal into a digital signal, and then the digital signal can be received and processed by the CPU of the control module 107.
In an embodiment of the present invention, preferably, as shown in fig. 1, 3 and 4, the current sampling module 105 further includes: a third switch 1052, the third switch 1052 being connected in series between the second capacitor 1051 and the source of the IGBT module 102.
In this embodiment, the third switch 1052 is connected in series between the source of the IBGT module 102 and the second capacitor 1051, and as shown in fig. 3, is turned on when the current passing through the first resistor 106 reaches the highest point a, and charges the second capacitor 1051, where the current value of the charged second capacitor 1051 is the peak current. The third switch 1052 is turned on when the IGBT current is at the highest point, so that the current charged by the second capacitor 1051 can be the peak voltage, thereby avoiding an error, and also avoiding the collection device from being damaged by a strong current or a strong voltage directly for a long time.
In one embodiment of the present invention, preferably, as shown in fig. 1 and 4, the current sampling module 105 further includes: a fourth switch 1053 and a third resistor 1054, wherein one end of the third resistor 1054 is connected with one end of the second capacitor 1051 through the fourth switch 1053, and the other end is connected with the other end of the second capacitor 1051.
In this embodiment, the fourth switch 1053 is connected in series with the third resistor 1054 and then connected in parallel with the second capacitor 1051 to ground, and after the current value sampling when the current analog-to-digital conversion device 1055 completes charging the second capacitor 1051, the fourth switch 1053 is turned on to discharge the second capacitor 1051. The second capacitor 1051 is discharged through the fourth switch 1053, so that the second capacitor 1051 can be restored to the initial state, the long-time charging and life reduction of the second capacitor 1051 are avoided, and the acquisition device can be prevented from being damaged by strong current and strong voltage. The third resistor 1054 and the fourth switch 1053 are connected in series and then grounded, so that the second capacitor 1051 can be prevented from being short-circuited with the ground during discharging, and overlarge instantaneous current can not be generated, thereby protecting the safety of the circuit.
In one embodiment of the present solution, preferably, as shown in fig. 1, the heating module 103 comprises: a coil 1031 and a third capacitor 1032, wherein one end of the coil 1031 is connected with the drain of the IGBT module 102, and the other end is connected with the power supply module 101; a third capacitor 1032 is connected in parallel with the coil 1031.
In this embodiment, one end of the coil 1031 is connected to the drain of the IGBT module 102, and the other end is connected to the power supply module 101, and when the IGBT module 102 is turned on, the coil 1031 is charged, and when the IGBT module 102 is turned off, oscillation is generated between the coil 1031 and the third capacitor 1032, and the appliance is heated by the oscillation voltage; the continuous heating of the appliance can be realized through the continuously repeated process of changing charging and oscillating.
When the induction cooker works, the IGBT module 102 is conducted to charge the coil 1031, the current of the IGBT module 102 rises at the moment, when the IGBT module 102 is closed, LC oscillation is generated between the coil 1031 and the third capacitor 1302, and the oscillation voltage heats the appliance; after the peak voltage and the peak current of two oscillation periods are obtained, the following formula is used:
wherein C is a capacitance value of the third capacitor 1032, L is an inductance of the coil 1031, U is a peak voltage, I is a peak current, and W is a power consumed by the appliance; after calculation, we obtain the value of the power W consumed by the appliance and the value of the inductance L of the coil 1031, according to the formula:
W＝δ×R；
wherein R is the appliance coupling impedance and δ is a coefficient; after calculation we obtain the coupling impedance R of the appliance. The coupling impedance R of the appliance can be further calculated from the calculated power W consumed by the appliance and the type of appliance determined accordingly.
In one embodiment of the present disclosure, preferably, the electromagnetic heating circuit further includes: and a first resistor 106, wherein one end of the first resistor 106 is connected to the power supply module 101, and the other end of the first resistor 106 is connected to the source of the IGBT module 102.
In this embodiment, by setting the first resistor 106, the surge in the circuit is absorbed, so that the operation of the circuit is more stable, and the optimization of the electromagnetic heating circuit is realized.
In one embodiment of the present solution, preferably, as shown in fig. 1, the power supply module 101 includes: the voltage-sensitive resistor comprises a connector 1011, a voltage-sensitive resistor 1012, a fourth capacitor 1013 and a power conversion device 1014, wherein the voltage-sensitive resistor 1012 is connected with the connector 1011; the fourth capacitor 1013 is connected in parallel with the piezo-resistor 1012; the input end of the power conversion device 1014 is connected in parallel with the voltage dependent resistor 1012, the positive pole of the output end of the power conversion device 1014 is connected with the heating module 103, and the negative pole of the output end of the power conversion device 1014 is connected with one end of the first resistor 106.
In this embodiment, the connector 1011 is connected to the commercial power, the commercial power is connected to the power conversion device 1014 through the connector 1011, the voltage dependent resistor 1012 is connected to the fourth capacitor 1013 in parallel and then connected to the connector 1011, and the power converter 1014 converts the ac power of the commercial power into dc power to be supplied to the heating module 103 to supply power to the heating module 103. The piezoresistor 1012 is connected with the connector 1011, and voltage clamping is carried out under the condition that the mains supply fluctuation generates overvoltage or lightning stroke, so that redundant current can be absorbed to protect circuit devices; the fourth capacitor 1013 is connected with the connector 1011 after being connected with the piezoresistor 1012 in parallel, so that low-frequency signals in the mains supply can be filtered, and noise can be removed; the power conversion device 1014 converts the ac power after removing the impurity into dc power which can be used by the heating module 103, thereby ensuring the operation of the heating module 103.
Embodiments of the second aspect of the present invention provide a heating platform, which includes the electromagnetic heating circuit according to any of the above embodiments, and therefore, the heating platform includes all the benefits of the electromagnetic heating circuit according to any of the above embodiments.
As shown in fig. 5, an appliance identification method according to an embodiment of the third aspect of the present invention is an appliance identification method for controlling an electromagnetic heating circuit according to any one of the above embodiments or a heating platform according to any one of the above embodiments to identify an appliance type, and the appliance identification method includes: s501, collecting peak currents of at least two oscillation periods; s502, collecting peak voltages of at least two oscillation periods; s503, calculating the power consumed by the appliance according to the peak current and the peak voltage; and S504, identifying the type of the appliance according to the power.
In this embodiment, the peak current and the peak voltage of at least two oscillation periods are respectively collected, the power consumed by the current appliance can be obtained through two calculations, and the collected data can be compared through three or more multiple samplings to obtain more accurate data. Therefore, the type of the appliance can be accurately judged according to the calculated power consumed by the appliance, the selection range of the appliance by a user is greatly expanded, data such as power parameters of the induction cooker and the like are adjusted according to the type of the appliance, extra loss is reduced, and the service life of a heating platform is prolonged; meanwhile, the performance of the electromagnetic heating circuit is improved, the energy efficiency ratio of the electromagnetic heating circuit is improved, and the working efficiency of the product is further improved.
In another embodiment of the present invention, as shown in fig. 6, S601, a first peak current of a charging process of a heating device in a first oscillation period is collected; s602, collecting a second peak current of the heating device in the charging process in a second oscillation period; s603, collecting a first peak voltage of a heating device in a discharging process in a first oscillation period; s604, collecting a second peak voltage of the heating device in the discharging process in a second oscillation period; s605, calculating the power consumed by the appliance according to the peak current and the peak voltage; and S606, identifying the type of the appliance according to the power.
In the embodiment, at least two oscillation periods, namely a first peak current and a second peak current, a first peak voltage and a second peak voltage of a first oscillation period and a second oscillation period are acquired, the first oscillation period and the second oscillation period can be two adjacent oscillation periods, the power consumed by the current appliance can be obtained through two times of calculation, and three or more multiple sampling can more accurately acquire data samples, so that inaccurate sampling caused by power fluctuation is avoided.
In another embodiment of the present invention, as shown in fig. 7, S701, it is determined whether the current of the heating device during the charging process reaches a peak value; if the judgment result is yes, S702 is carried out, the third switch is closed, and the peak current is collected; s703, judging whether the voltage of the heating device in the discharging process reaches a peak value; if the judgment result is yes, S704, closing the first switch and collecting the peak voltage; s705, calculating the power consumed by the appliance according to the peak current and the peak voltage; and S706, identifying the type of the appliance according to the power.
In this embodiment, in any oscillation period of the at least two oscillation periods, when it is determined that the current value of the heating device in the charging process reaches the peak value at this time, the third switch is closed to charge the second capacitor, and the peak current of the second capacitor is collected at this time; in any oscillation period of the at least two oscillation periods, when the current value of the heating device in the discharging process is judged to reach the peak value, the first switch is closed, the first capacitor is charged, and the peak voltage of the first capacitor is collected at the moment. By introducing the first capacitor and the second capacitor, the peak voltage of the first capacitor and the peak current of the second capacitor are adopted, so that the situation that the acquisition device is damaged by directly passing strong current and strong voltage for a long time can be avoided. When the current of the heating device reaches the peak value, the third switch is closed, so that the second capacitor is charged and the peak current is collected, the charging current of the second capacitor can be ensured to be the peak current, the sampling accuracy is improved, and the current collecting device is prevented from being damaged by long-time direct passing of strong current and strong voltage; the first switch is closed when the voltage of the heating device reaches the peak value, so that the first capacitor is charged and the peak voltage is collected, the charging voltage of the first capacitor can be ensured to be the peak voltage, the sampling accuracy is improved, and the voltage collecting device is prevented from being damaged by direct passing of strong current and strong voltage for a long time.
In another embodiment of the present invention, as shown in fig. 8, S801, it is determined whether the current of the heating device during charging reaches a peak value; if the judgment result is yes, S802, closing the third switch and collecting peak current; s803, closing the fourth switch to discharge the second capacitor; s804, judging whether the voltage of the heating device in the discharging process reaches a peak value; if the judgment result is yes, S805, closing the first switch and collecting the peak voltage; s806, closing the second switch to discharge the first capacitor; s807, calculating the power consumed by the appliance according to the peak current and the peak voltage; and S808, identifying the type of the appliance according to the power.
In this embodiment, after the peak current is collected, the fourth switch is closed to discharge the second capacitor; after the peak voltage is collected, the second switch is closed to discharge the first capacitor; the first capacitor and the second capacitor return to the initial state after discharging, the service life of the first capacitor and the second capacitor is prolonged, and the acquisition device is prevented from being damaged by strong current and strong voltage for a long time. The second resistor is grounded after being connected with the second switch in series, and the third resistor is grounded after being connected with the fourth switch in series, so that the first capacitor and the second capacitor are prevented from being short-circuited with the ground when being discharged, and overlarge instantaneous current cannot be generated, and the safety of the circuit is protected.
In yet another embodiment of the present invention, as shown in S901 of fig. 9, peak currents of at least two oscillation periods are collected; s902, collecting peak voltages of at least two oscillation periods; s903, calculating the power consumed by the appliance according to the peak current and the peak voltage; s904, calculating the coupling impedance of the appliance and the heating device according to the power; and S905, identifying the type of the appliance according to the coupling impedance. The peak current and the peak voltage of at least two oscillation periods are respectively collected, the power consumed by the current appliance can be obtained through two times of calculation, and the collected data can be compared by three or more times of multi-sampling so as to obtain more accurate data. The type of the appliance can be accurately judged according to the calculated power consumed by the appliance, so that the selection range of the appliance by a user is greatly expanded, data such as power parameters of the induction cooker and the like are adjusted according to the type of the appliance, the extra loss is reduced, and the service life of a heating platform is prolonged; meanwhile, the performance of the electromagnetic heating circuit is improved, the energy efficiency ratio of the electromagnetic heating circuit is improved, and the working efficiency of the product is further improved.
In this embodiment, in accordance with the power consumption calculated from the peak current and the peak voltage that have been collected, since different coupling impedances of different appliances consume different powers, the coupling impedance of the appliance and the heating apparatus can be calculated from the power, and the type of the appliance can be determined in accordance with the calculated coupling impedance.
When the induction cooker works, the IGBT module 102 is conducted to charge the coil 1031, the current of the IGBT module 102 rises at the moment, when the IGBT module 102 is closed, the heating module generates oscillation, and the oscillation voltage heats the appliance; after the peak voltage and the peak current of two oscillation periods are obtained, the following formula is used:
wherein C is a capacitance value of the third capacitor 1032, L is an inductance of the coil 1031, U is a peak voltage, I is a peak current, and W is a power consumed by the appliance; the value of the power W consumed by the appliance and the value of the inductance L of the coil 1031 are obtained after calculation, and according to the formula:
W＝δ×R；
wherein R is the coupling impedance and δ is a coefficient; and calculating to obtain the coupling impedance R. And the type of the appliance can be judged more accurately, so that the selection range of the appliance for a user is greatly expanded.
An embodiment of the fourth aspect of the present invention provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the appliance identification method according to any of the embodiments described above, and therefore, the computer device includes all the beneficial effects of the appliance identification method according to any of the embodiments described above.
An embodiment of the fifth aspect of the present invention provides a computer-readable storage medium, on which a computer program is stored, wherein the computer program, when executed by a processor, implements the appliance identification method according to any of the embodiments described above, and therefore, the computer-readable storage medium includes all the advantages of the appliance identification method according to any of the embodiments described above.
In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically limited, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, the description of the terms "one embodiment," "some embodiments," "specific embodiments," 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 the present invention, the schematic representations of the terms used above do not necessarily refer 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.
While the invention has been described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (17)
1. An electromagnetic heating circuit, comprising:
the power supply module is provided with a safety device;
the source electrode of the IGBT module is connected with the power supply module;
the control module is connected with the grid electrode of the IGBT module so as to control the on-off of the IGBT module;
one end of the heating module is connected with the drain electrode of the IGBT module, and the other end of the heating module is connected with the power supply module and used for heating an appliance;
one end of the voltage sampling module is connected with the drain electrode of the IGBT module, and the other end of the voltage sampling module is connected with the control module so as to send the acquired voltage value to the control module;
one end of the current sampling module is connected with the source electrode of the IGBT module, and the other end of the current sampling module is connected with the control module so as to send the acquired current value to the control module;
the control module calculates the power consumed by the appliance according to the voltage value and the current value, and then identifies the type of the appliance according to the power;
the voltage sampling module includes:
one end of the first capacitor is connected with the drain electrode of the IGBT module, the other end of the first capacitor is grounded,
and the voltage analog-to-digital conversion device is connected with the first capacitor so as to send the voltage value of the first capacitor to the control module.
2. The electromagnetic heating circuit of claim 1, wherein the voltage sampling module comprises:
a first switch connected in series between the drain of the IGBT module and the first capacitor.
3. The electromagnetic heating circuit of claim 2, wherein the voltage sampling module further comprises:
a second switch;
and one end of the second resistor is connected with one end of the first capacitor through a second switch, and the other end of the second resistor is connected with the other end of the first capacitor.
4. The electromagnetic heating circuit of claim 1, wherein the current sampling module comprises:
one end of the second capacitor is connected with the source electrode of the IGBT module, and the other end of the second capacitor is grounded;
and the current analog-to-digital conversion device is connected with the second capacitor so as to send the current value of the second capacitor during charging to the control module.
5. The electromagnetic heating circuit of claim 4, wherein the current sampling module further comprises:
a third switch connected in series between the second capacitor and the source of the IGBT module.
6. The electromagnetic heating circuit of claim 5, wherein the current sampling module further comprises:
a fourth switch;
and one end of the third resistor is connected with one end of the second capacitor through a fourth switch, and the other end of the third resistor is connected with the other end of the second capacitor.
7. The electromagnetic heating circuit according to any one of claims 1 to 6, characterized in that the heating module comprises:
a coil; one end of the coil is connected with the drain electrode of the IGBT module, and the other end of the coil is connected with the power supply module;
a third capacitor connected in parallel with the coil.
8. The electromagnetic heating circuit according to any one of claims 1 to 6, further comprising:
and one end of the first resistor is connected with the power supply module, and the other end of the first resistor is connected with the source electrode of the IGBT module.
9. The electromagnetic heating circuit of claim 8, wherein the power supply module comprises:
a connector assembly;
the piezoresistor is connected with the connector;
a fourth capacitor connected in parallel with the piezoresistor;
the input end of the power conversion device is connected with the piezoresistor in parallel, the anode of the output end of the power conversion device is connected with the heating module, and the cathode of the output end of the power conversion device is connected with one end of the first resistor.
10. A heated platform comprising an electromagnetic heating circuit as claimed in any one of claims 1 to 9.
11. An appliance identification method for controlling an electromagnetic heating circuit according to any one of claims 1 to 9 or a heating platform according to claim 10 to identify an appliance type, the appliance identification method comprising:
collecting peak currents of at least two oscillation periods;
collecting peak voltages of at least two oscillation periods;
calculating the power consumed by the appliance according to the peak current and the peak voltage;
identifying a type of the appliance from the power.
12. The appliance identification method according to claim 11,
the collecting of the peak currents of at least two oscillation periods specifically comprises:
collecting a first peak current of a heating device in a charging process in a first oscillation period;
collecting a second peak current of the heating device in the charging process in a second oscillation period;
the collecting of the peak voltages of at least two oscillation periods specifically comprises:
collecting a first peak voltage of a heating device in a discharging process in a first oscillation period;
and collecting a second peak voltage of the heating device in the discharging process in the second oscillation period.
13. The appliance identification method of claim 11, the voltage sampling module comprising:
a first switch connected in series between the drain of the IGBT module and the first capacitor; the current sampling module further comprises: a third switch, characterized in that,
the collecting of the peak currents of at least two oscillation periods specifically comprises:
in any oscillation period of the at least two oscillation periods, judging whether the current value of the heating device in the charging process reaches a peak value;
when the judgment result is yes, closing the third switch;
collecting the peak current;
the collecting of the peak voltages of at least two oscillation periods specifically comprises:
in any oscillation period of the at least two oscillation periods, judging whether the voltage value of the heating device in the discharging process reaches the peak value;
when the judgment result is yes, closing the first switch;
and collecting the peak voltage.
14. The appliance identification method of claim 11, the current sampling module comprising:
one end of the second capacitor is connected with the source electrode of the IGBT module, and the other end of the second capacitor is grounded; the current sampling module further comprises: a fourth switch; the voltage sampling module further comprises: a second switch, characterized in that,
after the collecting the peak current, the appliance identification method further comprises:
closing the fourth switch to discharge the second capacitance;
after the collecting the peak voltage, the appliance identification method further comprises:
closing the second switch to discharge the first capacitance.
15. The appliance identification method according to any of the claims 11 to 14, wherein identifying the type of the appliance from the power is in particular:
calculating the coupling impedance of the appliance and the heating device according to the power;
identifying a type of the appliance from the coupling impedance.
16. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the appliance identification method according to any of claims 11 to 15 when executing the computer program.
17. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out an appliance identification method according to any one of claims 11 to 15.
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| CN114680564B (en) * | 2020-12-29 | 2024-01-23 | 珠海优特智厨科技有限公司 | Cooking control method, cooking control device, storage medium and computer equipment |
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