CN102281658A - Synchronous signal acquiring circuit and control device for induction cooker and induction cooker - Google Patents
Synchronous signal acquiring circuit and control device for induction cooker and induction cooker Download PDFInfo
- Publication number
- CN102281658A CN102281658A CN2011102087788A CN201110208778A CN102281658A CN 102281658 A CN102281658 A CN 102281658A CN 2011102087788 A CN2011102087788 A CN 2011102087788A CN 201110208778 A CN201110208778 A CN 201110208778A CN 102281658 A CN102281658 A CN 102281658A
- Authority
- CN
- China
- Prior art keywords
- synchronous signal
- voltage
- acquisition circuit
- signal acquisition
- electromagnetic oven
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Inverter Devices (AREA)
Abstract
The invention relates to a synchronous signal acquiring circuit for an induction cooker. The induction cooker comprises an LC (inductance capacitance) resonance circuit and a power switch tube. The LC resonance circuit and the power switch tube are connected in series between a power supply which is rectified by an alternate current voltage to be obtained and the ground. The synchronous signal acquiring circuit comprises a voltage sampling unit and a synchronous signal generating unit for comparing a signal output by the voltage sampling unit with a preset voltage, converting the signal into a synchronous signal and outputting the synchronous signal into an interrupt port of a microcontroller. The voltage sampling unit is used for acquiring a voltage sampling signal by a junction of the LC resonance circuit and the power switch tube for controlling on-off between the LC resonance circuit and the ground. The invention also relates to a control device for the induction cooker and the induction cooker. The implementation of the synchronous signal acquiring circuit for the induction cooker and the induction cooker, which are disclosed by the invention, has the following beneficial effects that the synchronous signal acquiring circuit is convenient to acquire the on-off synchronous signal of the power switch tube; the switching loss of the power switch tube is low; and an output power is stable.
Description
Technical field
The present invention relates to electromagnetism heating field, more particularly, relate to the synchronous signal acquisition circuit, control device and the electromagnetic oven that are used for electromagnetic oven.
Background technology
By the angle of circuit, the principle of electromagnetic oven becomes the high-frequency ac voltage of 20-40KHz again for by rectification circuit the alternating voltage of 50/60Hz being become direct voltage through the LC harmonic conversion.The voltage resonance converter is generally power switch pipe, as the IGBT pipe, is controlled its conducting and ends by drive circuit by control signal.And needing synchronous control signal to cooperate, the generation of this control signal realizes.
In present technology, above-mentioned synchronous control signal is respectively at the sampling of the two ends of resonant capacitance, through electric resistance partial pressure, be transported to the two ends of comparator respectively, through back generation synchronous control signal relatively.Its principle as shown in Figure 1.The two ends sampling of the LC oscillating circuit of forming respectively at resonant capacitance C8 and drum inductance XL obtains its voltage, after resistance R 2, R5, R1 and R3, R4, R6 dividing potential drop, is entered into the backward end and the forward end of comparator respectively.When electromagnetic oven is worked, when IGBT opened, the electric current that flows through inductance coil began to increase by zero, and the voltage left side at resonant capacitance C8 two ends is high right low, voltage is after resistance R 2, R5, R1, R3, R4 and R6 dividing potential drop, comparator UC1 backward end voltage produces low level signal greater than comparator forward end voltage, when IGBT ends, drum inductive loop XL charges to capacitor C 8, the voltage left side at resonant capacitance C8 two ends is low right high, and voltage produces a high level behind comparator UC1.After capacitor C 8 charging voltages peaked, 8 pairs of drum inductance of capacitor C XL discharged, and finishes resonant process one time.When above-mentioned resonant process was in capacitor C 8 discharge and finishes soon, the backward end dividing potential drop of comparator UC1 was greater than the forward end dividing potential drop, and the upset output low level takes place comparator UC1.Comparator is output as synchronizing signal, and this signal is input to the interruptive port of MCU control unit as the MCU interrupt signal.MCU interrupt to adopt trailing edge to trigger, and when MCU detected synchronizing signal and has trailing edge to trigger, MCU control unit output high level was opened IGBT.And so forth, the control continuous conducting of IGBT and ending.The major defect of above-mentioned prior art is: owing to the backward end voltage of comparator is that change in voltage along with the input AC electricity changes, when input voltage raises, voltage after rectification also can be along with rising, comparator backward end voltage also can and then raise, and will appear at like this to produce when having the trailing edge synchronizing signal to trigger, and this moment, resonant capacitance did not also have discharge off, the voltage ratio of collector electrode is higher, open IGBT this moment, causes the turn-on consumption of IGBT very big, fragile IGBT.The backward end voltage of comparator constantly changes with the variation of input voltage simultaneously, causes power output unstable, and it is big and wayward to fluctuate up and down.
Summary of the invention
The technical problem to be solved in the present invention is, at above-mentioned prior art synchronizing signal instability, cause the switching loss of power switch pipe big, the unsettled defective of power output, provide a kind of stable and reliably, solved the big and unsettled electromagnetic oven synchronous signal acquisition of the power circuit of switching loss of rate switching tube.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of synchronous signal acquisition circuit that is used for electromagnetic oven, described electromagnetic oven comprises LC resonant tank and power switch pipe, described LC resonant tank and described power switch pipe be serially connected in by ac voltage rectifier power supply and ground between, described synchronous signal acquisition circuit comprises the voltage sample unit and described voltage sample element output signal and setting voltage comparison is converted to synchronizing signal and outputs to the synchronizing signal generation unit of microcontroller interruptive port; Described voltage sample unit is by described LC resonant tank and control conducting between described LC resonant tank and the ground or the tie point of the power switch pipe of disconnection is obtained described voltage sampling signal.
At the synchronous signal acquisition circuit that is used for electromagnetic oven of the present invention, described voltage sample unit is to be serially connected in tie point between described power switch pipe and the described LC resonant tank and the bleeder circuit between the ground, described bleeder circuit is the resistance of two serial connections, and described voltage sampling signal is obtained by the link of described two resistance.
At the synchronous signal acquisition circuit that is used for electromagnetic oven of the present invention, described power switch pipe comprises IGBT, the collector electrode of described IGBT is connected with described LC resonant tank one end, the described LC resonant tank other end is connected the dc voltage output end that is obtained by AC rectification, the grounded emitter of described IGBT.
At the synchronous signal acquisition circuit that is used for electromagnetic oven of the present invention, described synchronizing signal generation unit comprises comparator, the negative input end of described comparator is connected with a fixed voltage generator, and described comparator positive input terminal is electrically connected with the output of described voltage sample unit.
At the synchronous signal acquisition circuit that is used for electromagnetic oven of the present invention, described fixed voltage generation unit is for being fixed direct voltage+5V dividing potential drop two divider resistances of voltage, and described fixed voltage is by the tie point output of described two resistance.
At the synchronous signal acquisition circuit that is used for electromagnetic oven of the present invention, described voltage sample unit output is connected to described comparator positive input terminal by first electric capacity, second resistance, and the tie point of described first electric capacity and second resistance also is connected to ground by first resistance.
At the synchronous signal acquisition circuit that is used for electromagnetic oven of the present invention, also comprise the double limiting unit that is connected described comparator positive input terminal.
At the synchronous signal acquisition circuit that is used for electromagnetic oven of the present invention, described double limiting unit is first diode and second diode, the positive pole of described first diode is connected described comparator positive input terminal, and its negative pole is connected the power supply positive pole of described comparator; Described second diode cathode is connected described comparator positive input terminal, and its positive pole is connected to ground.
The invention still further relates to a kind of battery stove control device, comprise other circuit of synchronous signal acquisition circuit and realization functions of induction cookers, wherein, described synchronous signal acquisition circuit is above-mentioned any described synchronous signal acquisition circuit that is used for electromagnetic oven.
The invention still further relates to a kind of electromagnetic oven, comprise other circuit of synchronous signal acquisition circuit and realization functions of induction cookers, wherein, described synchronous signal acquisition circuit is above-mentioned any described synchronous signal acquisition circuit that is used for electromagnetic oven.
Implement the synchronous signal acquisition circuit that is used for electromagnetic oven of the present invention, control device and electromagnetic oven, has following beneficial effect: because synchronous acquisition circuit is only obtained a voltage sample value by the tie point of power switch pipe and LC resonant tank, and replace another voltage sample value that may occur changing in the prior art with stable setting voltage, obtain synchronizing signal by more above-mentioned two magnitudes of voltage, so the time that this synchronizing signal produces comparatively suitably can't fluctuate with the fluctuation of input ac voltage, thereby makes this power switch pipe not fragile, power output is stable.
Description of drawings
Fig. 1 is the structural representation that is used for the synchronous signal acquisition circuit of electromagnetic oven in the prior art;
Fig. 2 is the structural representation of the present invention's synchronous signal acquisition circuit, control device and electromagnetic oven embodiment synchronous signal acquisition circuit of being used for electromagnetic oven;
Fig. 3 is the synchronous signal acquisition circuit theory diagrams among the described embodiment;
Fig. 4 is the crest voltage and the synchronization waveform schematic diagram of switching tube collector electrode among the described embodiment;
Fig. 5 is synchronizing signal and a driving signal of power switching tube waveform schematic diagram among the described embodiment;
Fig. 6 is the waveform schematic diagram of the crest voltage of the drive signal of switching tube among the described embodiment and switching tube collector electrode.
Embodiment
Embodiments of the present invention is further illustrated below in conjunction with accompanying drawing.
As shown in Figure 2, at synchronous signal acquisition circuit and the electromagnetic oven embodiment thereof that is used for electromagnetic oven of the present invention, the circuit of electromagnetic oven comprises LC resonant tank 21 and power switch pipe 22 at least, wherein, LC resonant tank 21 and power switch pipe 22 be serially connected in by ac voltage rectifier power supply (being the terminal of the direct voltage that obtains behind the AC rectification that marks among Fig. 2) and ground between, and the synchronous signal acquisition circuit in the present embodiment comprises voltage sample unit 23 and voltage sample unit 23 output signals are converted to synchronizing signal with setting voltage (referring to Fig. 2) comparison and output to the synchronizing signal generation unit 24 of the interruptive port of microcontroller (MCU) 25; Voltage sampling signal is obtained by the tie point of the power switch pipe 22 of conducting or disconnection between LC resonant tank 21 and control LC resonant tank 21 and the ground in voltage sample unit 23.In the present embodiment, the control end of above-mentioned power switch pipe 22 input triggering signal is controlled ending and conducting of this power switch pipe 22, thereby makes an end and the earth potential disconnection or the connection of above-mentioned LC resonant tank in parallel.Above-mentioned triggering signal is equally from an input/output end port of microcontroller (being MCU) 25, and specifically, when the interruptive port of MCU25 was received synchronizing signal, its corresponding input/output end port output triggering signal made power switch pipe 22 conductings.In Fig. 2, produce synchronizing signal owing to just obtaining a voltage sample value with the fixed voltage comparison by the tie point of LC resonant tank 21 and power switch pipe 22, this makes that the relation of the generation of synchronizing signal and variation of AC voltage is less, the influence that the alternating voltage that can not be imported changes, its work is comparatively stable.
In the present embodiment, referring to Fig. 3, above-mentioned voltage sample unit 23 is IGBT among Fig. 3 for being serially connected in power switch pipe 22() be inductance XL and capacitor C 2 in parallel among Fig. 3 with LC resonant tank 21() between tie point and the bleeder circuit between the ground, this bleeder circuit is the resistance (resistance R 1 among Fig. 3 and resistance R 2) of two serial connections, and this voltage sample value is obtained by the link of above-mentioned two resistance (resistance R 1 and resistance R 2).As shown in Figure 3, power switch pipe 22 is IGBT in this enforcement, the collector electrode of this IGBT is connected with LC resonant tank 21 1 ends, it (is an end of inductance L 1 among Fig. 3 that LC resonant tank 21 other ends are connected the dc voltage output end that is obtained by AC rectification, the other end of inductance L 1 is connected with the dc output end of rectifier bridge heap CB1), the grounded emitter of IGBT.Certainly, in other embodiments, above-mentioned power switch pipe 22 can not be IGBT also, but other the device for power switching that meets the demands for example, can be power MOSFET or the like.
In the present embodiment, synchronizing signal generation unit 24 comprises comparator ICA, and the negative input end of comparator ICA is connected with a fixed voltage generator, and the positive input terminal of comparator ICA is electrically connected with the output of voltage sample unit 23.In the present embodiment, the fixed voltage generation unit is to be fixed two divider resistances (being resistance R 9 and the resistance R 10 among Fig. 3) of voltage through the direct voltage+5V dividing potential drop of over commutation, voltage stabilizing, and said fixing voltage is by the tie point output of above-mentioned two resistance (being resistance R 9 and resistance R 10).Because resistance R 9 and resistance R 10 are that 5V is carried out dividing potential drop, so needn't use high-power resistance, two general resistance just can be realized.Because the cost of power resistor is higher, and needs to use more power resistor in the prior art, in the present embodiment, the use of above-mentioned general resistance makes the cost of entire circuit be minimized.In addition, the output of voltage sample unit 23 is connected to comparator ICA positive input terminal by first electric capacity (capacitor C 3 among Fig. 3), second resistance (resistance R 8 among Fig. 3), and the tie point of above-mentioned first electric capacity (capacitor C 3 among Fig. 3) and second resistance (resistance R 8 among Fig. 3) also is connected to ground by first resistance (resistance R 7 among Fig. 3).
In the present embodiment, above-mentioned synchronous signal acquisition circuit also comprises the double limiting unit that is connected comparator ICA positive input terminal.The double limiting unit is the first diode D13 and the second diode D6, the positive pole of the first diode D13 is connected the positive input terminal of comparator ICA, its negative pole is connected the power supply positive pole of comparator ICA, and the supply power voltage that makes voltage on the above-mentioned positive input terminal be up to this comparator adds the conducting voltage of diode; The negative pole of the second diode D6 is connected the positive input terminal of comparator ICA, and its positive pole is connected to ground.Above-mentioned amplitude limit unit has further limited the voltage on the comparator positive input terminal, makes its more stable work.
Generally, concrete circuit as shown in Figure 3.Produce the reference voltage of backward end of the comparator of synchronizing signal, by 5V voltage through resistance R 9 and resistance R 10 dividing potential drops after, take out the voltage of resistance R 10 and get.Because after the voltage of comparator backward end is fixing, when switching tube transfers to when turn-offing by opening, inductive load charges to resonant capacitance C2, the collector voltage of switching tube raises, after voltage reaches peak-peak voltage, discharge through inductance XL then, the IGBT collector voltage reduces, when collector voltage reduces to certain voltage, upset takes place and produces a trailing edge signal from high to low in comparator, this synchronizing signal is given MCU and is interrupted detecting the I/O mouth, and MCU detects in the synchronizing signal and has no progeny, and produces a drive signal and opens IGBT.Because the backward end voltage of comparator ICA is adjustable, power tube can accomplish that almost no-voltage is open-minded, reach and open low-loss effect, signal waveform as shown in Figure 4, half-wave sinusoidal waveform figure among Fig. 4 is the collector voltage waveform of IGBT, the sync break signal that another waveform among Fig. 4 produces for comparator ICA.After MCU detected interrupt signal, MCU just exported a drive signal and opens switching tube IGBT.At this moment, signal waveform as shown in Figure 5, in Fig. 5, square wave is a drive signal.
Because the reference voltage of sync comparator is fixed, the fluctuation with input voltage does not change, so when producing the sync break signal at every turn, collector electrode and emitter voltage are certain, and voltage difference is close to zero, so when opening IGBT, loss to IGBT is very little, realizes soft synchronous.In the application of reality, can realize the soft purpose of opening of IGBT by the resistance of adjusting resistance R 9 and resistance R 10, turn-on consumption is dropped to minimum.At this moment, sync waveform as shown in Figure 6, the semisinusoidal waveform figure among the figure is the collector voltage waveform of IGBT, square wave is the drive signal that MCU produces.
In the present embodiment, also relate to a kind of electromagnetic oven control device, it has the synchronous signal acquisition circuit and other realize the circuit of functions of induction cookers, and its synchronous signal acquisition circuit is exactly above-mentioned synchronous signal acquisition circuit.
In the present embodiment, also relate to a kind of electromagnetic oven, it has the synchronous signal acquisition circuit and other realize the circuit of functions of induction cookers, and its synchronous signal acquisition circuit is exactly above-mentioned synchronous signal acquisition circuit.
The above embodiment has only expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (10)
1. synchronous signal acquisition circuit that is used for electromagnetic oven, described electromagnetic oven comprises LC resonant tank and power switch pipe, described LC resonant tank and described power switch pipe are serially connected between the power supply and ground that is got by ac voltage rectifier, it is characterized in that described synchronous signal acquisition circuit comprises the voltage sample unit and with described voltage sample element output signal and setting voltage comparison and be converted to synchronizing signal and output to the synchronizing signal generation unit of microcontroller interruptive port; Described voltage sample unit is by described LC resonant tank and control conducting between described LC resonant tank and the ground or the tie point of the power switch pipe of disconnection is obtained described voltage sampling signal.
2. the synchronous signal acquisition circuit that is used for electromagnetic oven according to claim 1, it is characterized in that, described voltage sample unit is to be serially connected in tie point between described power switch pipe and the described LC resonant tank and the bleeder circuit between the ground, described bleeder circuit is the resistance of two serial connections, and described voltage sampling signal is obtained by the link of described two resistance.
3. the synchronous signal acquisition circuit that is used for electromagnetic oven according to claim 2, it is characterized in that, described power switch pipe comprises IGBT, the collector electrode of described IGBT is connected with described LC resonant tank one end, the described LC resonant tank other end is connected the dc voltage output end that is obtained by AC rectification, the grounded emitter of described IGBT.
4. the synchronous signal acquisition circuit that is used for electromagnetic oven according to claim 3, it is characterized in that, described synchronizing signal generation unit comprises comparator, the negative input end of described comparator is connected with a fixed voltage generator, and described comparator positive input terminal is electrically connected with the output of described voltage sample unit.
5. the synchronous signal acquisition circuit that is used for electromagnetic oven according to claim 4, it is characterized in that, described fixed voltage generation unit is for being fixed direct voltage+5V dividing potential drop two divider resistances of voltage, and described fixed voltage is by the tie point output of described two resistance.
6. the synchronous signal acquisition circuit that is used for electromagnetic oven according to claim 5, it is characterized in that, described voltage sample unit output is connected to described comparator positive input terminal by first electric capacity, second resistance, and the tie point of described first electric capacity and second resistance also is connected to ground by first resistance.
7. the synchronous signal acquisition circuit that is used for electromagnetic oven according to claim 6 is characterized in that, also comprises the double limiting unit that is connected described comparator positive input terminal.
8. the synchronous signal acquisition circuit that is used for electromagnetic oven according to claim 7, it is characterized in that, described double limiting unit is first diode and second diode, the positive pole of described first diode is connected described comparator positive input terminal, and its negative pole is connected the power supply positive pole of described comparator; Described second diode cathode is connected described comparator positive input terminal, and its positive pole is connected to ground.
9. an electromagnetic oven control device comprises the synchronous signal acquisition circuit, it is characterized in that described synchronous signal acquisition circuit is any described synchronous signal acquisition circuit that is used for electromagnetic oven of claim 1-8.
10. an electromagnetic oven comprises the synchronous signal acquisition circuit, it is characterized in that, described synchronous signal acquisition circuit is any described synchronous signal acquisition circuit that is used for electromagnetic oven of claim 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102087788A CN102281658A (en) | 2011-07-25 | 2011-07-25 | Synchronous signal acquiring circuit and control device for induction cooker and induction cooker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102087788A CN102281658A (en) | 2011-07-25 | 2011-07-25 | Synchronous signal acquiring circuit and control device for induction cooker and induction cooker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102281658A true CN102281658A (en) | 2011-12-14 |
Family
ID=45106752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102087788A Pending CN102281658A (en) | 2011-07-25 | 2011-07-25 | Synchronous signal acquiring circuit and control device for induction cooker and induction cooker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102281658A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103904871A (en) * | 2014-03-25 | 2014-07-02 | 深圳麦格米特电气股份有限公司 | Control method of high-frequency heating power switch tube protection circuit |
| CN104640257A (en) * | 2015-02-04 | 2015-05-20 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating switch control circuit and electromagnetic heating device with same |
| CN104850165A (en) * | 2015-03-16 | 2015-08-19 | 昂宝电子（上海）有限公司 | Control circuit and control method for induction cooker and induction cooker |
| CN105191489A (en) * | 2012-12-12 | 2015-12-23 | 阿塞里克股份有限公司 | An induction heating cooktop |
| CN106211392A (en) * | 2015-04-30 | 2016-12-07 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating system and switching tube thereof open control apparatus and method |
| CN106211394A (en) * | 2015-04-30 | 2016-12-07 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating system and switching tube thereof open control apparatus and method |
| CN106714354A (en) * | 2015-11-13 | 2017-05-24 | 比亚迪股份有限公司 | Electromagnetic heating device and control method thereof |
| CN106714351A (en) * | 2015-08-03 | 2017-05-24 | 佛山市顺德区美的电热电器制造有限公司 | Zero crossing conduction time determination method and determination system and electromagnetic heating device |
| CN106937423A (en) * | 2015-12-31 | 2017-07-07 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heater and its laser heating control method |
| CN107959988A (en) * | 2016-10-17 | 2018-04-24 | 佛山市顺德区美的电热电器制造有限公司 | Drive circuit and cooking apparatus |
| CN108155817A (en) * | 2016-12-02 | 2018-06-12 | 中惠创智（深圳）无线供电技术有限公司 | A kind of synchronous rectification switch, circuit and chip |
| CN106152193B (en) * | 2015-04-08 | 2019-01-11 | 美的集团股份有限公司 | Electromagnetic heating system and its cookware detection circuit, detection method |
| CN114205941A (en) * | 2020-09-18 | 2022-03-18 | 杭州九阳小家电有限公司 | Electromagnetic heating control circuit and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002299027A (en) * | 2001-03-30 | 2002-10-11 | Hitachi Hometec Ltd | Induction cooker |
| JP2002343547A (en) * | 2001-05-10 | 2002-11-29 | Toshiba Home Technology Corp | Electromagnetic heating control device |
| CN101159998A (en) * | 2007-10-30 | 2008-04-09 | 深圳市和而泰电子科技有限公司 | Synchronous control method and circuit of electromagnetic stove |
-
2011
- 2011-07-25 CN CN2011102087788A patent/CN102281658A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002299027A (en) * | 2001-03-30 | 2002-10-11 | Hitachi Hometec Ltd | Induction cooker |
| JP2002343547A (en) * | 2001-05-10 | 2002-11-29 | Toshiba Home Technology Corp | Electromagnetic heating control device |
| CN101159998A (en) * | 2007-10-30 | 2008-04-09 | 深圳市和而泰电子科技有限公司 | Synchronous control method and circuit of electromagnetic stove |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105191489A (en) * | 2012-12-12 | 2015-12-23 | 阿塞里克股份有限公司 | An induction heating cooktop |
| CN103904871A (en) * | 2014-03-25 | 2014-07-02 | 深圳麦格米特电气股份有限公司 | Control method of high-frequency heating power switch tube protection circuit |
| CN103904871B (en) * | 2014-03-25 | 2016-09-07 | 深圳麦格米特电气股份有限公司 | The control method of high-frequency heating power switching tube protection circuit |
| CN104640257A (en) * | 2015-02-04 | 2015-05-20 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating switch control circuit and electromagnetic heating device with same |
| CN104850165A (en) * | 2015-03-16 | 2015-08-19 | 昂宝电子（上海）有限公司 | Control circuit and control method for induction cooker and induction cooker |
| CN106152193B (en) * | 2015-04-08 | 2019-01-11 | 美的集团股份有限公司 | Electromagnetic heating system and its cookware detection circuit, detection method |
| CN106211394A (en) * | 2015-04-30 | 2016-12-07 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating system and switching tube thereof open control apparatus and method |
| CN106211392A (en) * | 2015-04-30 | 2016-12-07 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating system and switching tube thereof open control apparatus and method |
| CN106211394B (en) * | 2015-04-30 | 2019-05-31 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating system and its switching tube open control device and method |
| CN106211392B (en) * | 2015-04-30 | 2019-07-02 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating system and its switching tube open control device and method |
| CN106714351A (en) * | 2015-08-03 | 2017-05-24 | 佛山市顺德区美的电热电器制造有限公司 | Zero crossing conduction time determination method and determination system and electromagnetic heating device |
| CN106714354A (en) * | 2015-11-13 | 2017-05-24 | 比亚迪股份有限公司 | Electromagnetic heating device and control method thereof |
| CN106937423A (en) * | 2015-12-31 | 2017-07-07 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heater and its laser heating control method |
| CN107959988A (en) * | 2016-10-17 | 2018-04-24 | 佛山市顺德区美的电热电器制造有限公司 | Drive circuit and cooking apparatus |
| CN107959988B (en) * | 2016-10-17 | 2024-01-30 | 佛山市顺德区美的电热电器制造有限公司 | Drive circuit and cooking utensil |
| CN108155817A (en) * | 2016-12-02 | 2018-06-12 | 中惠创智（深圳）无线供电技术有限公司 | A kind of synchronous rectification switch, circuit and chip |
| CN114205941A (en) * | 2020-09-18 | 2022-03-18 | 杭州九阳小家电有限公司 | Electromagnetic heating control circuit and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102281658A (en) | Synchronous signal acquiring circuit and control device for induction cooker and induction cooker | |
| CN100539768C (en) | A kind of electromagnetic oven synchronisation control means and circuit thereof | |
| CN102723886B (en) | High power factor switch power supply and controller and control method thereof | |
| US10330711B2 (en) | Method and device for detecting current of inductor of PFC circuit | |
| CN102332814B (en) | Power factor correction control circuit for reducing EMI (electro magnetic interference) | |
| CN102570830B (en) | Modular photovoltaic power electronic converter based on coupling inductance | |
| CN102055344B (en) | Switch power supply | |
| CN201063536Y (en) | Power converter with active power factor emendation | |
| CN106685242B (en) | Single-stage AC to DC converter | |
| CN108696164A (en) | The single-phase photovoltaic grid-connected Miniature inverter of flyback and control method of DCM frequency control | |
| CN102435828B (en) | Isolated type circuit-voltage zero-crossing detecting circuit | |
| CN103825475A (en) | Circuit and control method for improving vehicle-mounted charger power factor | |
| CN103633828B (en) | Control circuit in a kind of circuit of power factor correction | |
| CN105515415A (en) | Power conversion circuit, power conversion method and air conditioner | |
| CN105305578B (en) | A kind of high-efficiency high power wireless electric vehicle charging device | |
| CN109568788A (en) | Output power regulating circuit and frequency spectrum therapeutic instrument | |
| CN203840236U (en) | Pulse power supply | |
| CN109004850A (en) | A kind of half-bridge active power factor correction circuit and a kind of frequency-variable controller and a kind of power circuit | |
| CN102769394A (en) | Single-phase controllable rectification circuit | |
| CN104578454A (en) | Novel single-phase load wireless electric energy transmission system and design method thereof | |
| CN204967397U (en) | Car charger | |
| CN203801099U (en) | Power circuit and microwave oven | |
| CN203896194U (en) | Switch power supply | |
| CN206004637U (en) | IGBT drive circuit, half-bridge electromagnetic heating circuit and induction cooker | |
| CN106160558A (en) | A kind of pure sine wave inverter with high frequency chopping signal isolation features |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20111214 |