CN203219529U - Synchronous width modulation type induction heating device - Google Patents
Synchronous width modulation type induction heating device Download PDFInfo
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- CN203219529U CN203219529U CN 201320167379 CN201320167379U CN203219529U CN 203219529 U CN203219529 U CN 203219529U CN 201320167379 CN201320167379 CN 201320167379 CN 201320167379 U CN201320167379 U CN 201320167379U CN 203219529 U CN203219529 U CN 203219529U
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Abstract
The utility model discloses a synchronous width modulation type induction heating device which comprises an output circuit, a high-frequency rectifying and shaping circuit, a pulse modulation module and a driving circuit. Current signal output ends of the output circuit are connected with input ends of the high-frequency rectifying and shaping circuit, an output end of the high-frequency rectifying and shaping circuit is connected with an input end of the pulse modulation module, an output end of the pulse modulation module is connected with an input end of the driving circuit, an output end of the driving circuit is connected with an input end of the output circuit, and another current signal output end of the output circuit is connected with a heating plate. The synchronous width modulation type induction heating device has the advantages that pulses of the driving circuit are assuredly accurately outputted at zero-crossing moments of currents of the output circuit, and constantly keep synchronously running with resonant frequencies of the output circuit, so that power consumption is effectively reduced, and high-frequency oscillation and whistling of an induction cooker are prevented.
Description
Technical field
The utility model relates to the electromagnetic heating technique field, relates in particular to a kind of synchronous width modulation type induction heating equipment.
Background technology
At present, the electromagnetic oven that in our daily life, uses, comprise that inversion drives generation, modulation, the control circuit of signal, normally adopt the pulse frequency modulated mode that load (heat coil dish) is discharged, make voltage, electric current, pulse duration and the impulse waveform parameter of output all meet the demands, but still exist output frequency and resonant circuit natural frequency to differ bigger defective, make electromagnetic oven produce the higher-order of oscillation easily and utter long and high-pitched sounds, but also have problems such as power loss height, power tube heating are many; Some electromagnetic oven inserts phase-locked loop circuit among the pulse frequency modulated mode in addition, but still can not realize synchronous stable control fully, and circuit loss is still high.
The utility model content
Technical problem to be solved in the utility model is: a kind of synchronous width modulation type induction heating equipment is provided, the generation that guarantees the drive circuit pulse is constantly all the time at the zero crossing of output circuit, and remain the synchronous operation with the output circuit resonance frequency, reduced the loss of power effectively, prevented that electromagnetic oven from producing the higher-order of oscillation and uttering long and high-pitched sounds.
For solving the problems of the technologies described above, the utility model proposes a kind of synchronous width modulation type induction heating equipment, comprise output circuit, high-frequency rectification shaping circuit, pulse modulation module, drive circuit, the current signal output end of described output circuit connects the input of high-frequency rectification shaping circuit, the output of high-frequency rectification shaping circuit connects the input of pulse modulation module, the output of pulse modulation module connects the input of drive circuit, the output of drive circuit connects the input of output circuit, and the current signal output end of described output circuit is connected with heating plate.
Further, described pulse modulation module comprises oscillator and pulse modulator, the synchronous end Tb of the output connection oscillator of high-frequency rectification shaping circuit, the external capacitor end Ct of oscillator connects the positive pole of pulse modulator, the negative pole of pulse modulator connects control level signal In, and the output of pulse modulator connects the input of drive circuit; The external capacitor end Ct of oscillator is by oscillating capacitor ground connection, and the outer meeting resistance end Rt of oscillator is by oscillation resistance device ground connection.
Further, described output circuit comprises two current signal output ends; The high-frequency rectification shaping circuit comprises bridge rectifier QD and amplifier comparator M1, two inputs of bridge rectifier QD are connected with two current signal output ends of output circuit, the negativing ending grounding of bridge rectifier QD output, the positive terminating resistor R1 of bridge rectifier QD output, the other end of resistance R 1 connects the negative pole of resistance R 2 and amplifier comparator M1, the other end ground connection of resistance R 2, the positive pole of amplifier comparator M1 connects the series connection contact of resistance R 3 and resistance R 4, the other end of resistance R 3 connects Vcc, the other end ground connection of resistance R 4, the output of amplifier comparator M1 connects the synchronous end Tb of pulse modulation module; The Vi end of described pulse modulation module connects control level signal In, the two-way output of pulse modulation module connects two inputs of drive circuit, the external capacitor end Ct of pulse modulation module is by oscillating capacitor ground connection, the outer meeting resistance end Rt of pulse modulation module is by oscillation resistance device ground connection, the output GND ground connection of pulse modulation module.
Technique scheme has following beneficial effect at least: the utility model is by adopting the input that the current signal output end of described output circuit is connected the high-frequency rectification shaping circuit, the output of high-frequency rectification shaping circuit connects the input of pulse modulation module, the output of pulse modulation module connects the input of drive circuit, the output of drive circuit connects the input of output circuit, the current signal output end of described output circuit also is connected with heating plate, guarantee that the output time point of drive circuit pulse occurs in the zero passage moment of output circuit electric current exactly, and remain the synchronous operation with the output circuit resonance frequency, reduced the loss of power effectively, prevented that electromagnetic oven from producing the higher-order of oscillation and uttering long and high-pitched sounds.
Description of drawings
Fig. 1 is the theory diagram of the synchronous width modulation type induction heating equipment of the utility model.
Fig. 2 is the schematic diagram of the synchronous width modulation type induction heating equipment of the utility model embodiment one.
Fig. 3 is the schematic diagram of the synchronous width modulation type induction heating equipment of the utility model embodiment two.
Embodiment
Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.Below in conjunction with accompanying drawing the utility model is described further.
As shown in Figure 1, the synchronous width modulation type induction heating equipment of the utility model embodiment, comprise output circuit 10, high-frequency rectification shaping circuit 20, pulse modulation module 30, drive circuit 40, the current signal output end of described output circuit 10 connects the input of high-frequency rectification shaping circuit 20, the output of high-frequency rectification shaping circuit 20 connects the input of pulse modulation module 30, the output of pulse modulation module 30 connects the input of drive circuit 40, the output of drive circuit 40 connects the input of output circuit 10, and the current signal output end of described output circuit 10 is connected with heating plate 5.
As Fig. 2, in embodiment one of the present utility model, described pulse modulation module 30 comprises oscillator 301 and pulse modulation comparator 302, the synchronous end Tb of the output connection oscillator 301 of high-frequency rectification shaping circuit 20, the external capacitor end Ct of oscillator 301 connects the positive pole of pulse modulation comparator 302, the negative pole of pulse modulation comparator 302 connects control level signal In, and the output of pulse modulation comparator 302 connects the input of drive circuit 40; Oscillator 301 external capacitor end Ct are by oscillating capacitor ground connection, and the outer meeting resistance end Rt of oscillator 301 is by oscillation resistance device ground connection.
As Fig. 3, in embodiment two of the present utility model, described output circuit 10 comprises two current signal output ends; High-frequency rectification shaping circuit 20 comprises bridge rectifier QD and amplifier comparator M1, be connected with two current signal output ends of output circuit 10 by two inputs after the bridge rectifier QD ground connection, ground connection after the positive pulse output resistance R 1 of bridge rectifier QD and resistance R 2 dividing potential drops, resistance R 1 is connected the negative pole of amplifier comparator M1 with the link of resistance R 2, the positive pole of amplifier comparator M1 connects ground connection after resistance R 4 dividing potential drops, the positive pole of amplifier comparator M1 is by the reference voltage output end Vcc of resistance R 3 connection pulse modulation module 30, and the output of amplifier comparator M1 connects the synchronous end Tb of pulse modulation module 30; The Vi end of described pulse modulation module 30 connects control level signal In, the two-way output of pulse modulation module 30 connects two inputs of drive circuit 40, the external capacitor end Ct of pulse modulation module 30 is by oscillating capacitor ground connection, the outer meeting resistance end Rt of pulse modulation module 30 is by oscillation resistance device ground connection, the output GND ground connection of pulse modulation module 30.
To sum up, during work, sine wave output electric current in the output circuit 10, when the amplitude of current signal in the output circuit 10 was similar to zero point, high-frequency rectification shaping circuit 20 was exported a direct impulse, and was delivered to the synchronous end Tb of oscillator 301.Before this, the frequency of oscillation of oscillator 301 is determined by the numerical value of oscillation resistance and oscillating capacitance, and the natural resonance frequency that is slightly less than output circuit 10 is set, if control level is change not, then oscillator 301 is under the direct impulse effect, and upset in advance enters next circulation vibration, pulse after the modulation promotes output circuit 10 work after driving amplification; If control level change, then oscillator 301 oscillatory work under another frequency.
The utility model occurs in the zero passage moment of output circuit 10 electric currents exactly by the output time point that guarantees drive circuit 40 pulses, and remain the synchronous operation with output circuit 10 resonance frequencys, reduced the loss of power effectively, prevented that electromagnetic oven from producing the higher-order of oscillation and uttering long and high-pitched sounds.
The above is embodiment of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also are considered as protection range of the present utility model.
Claims (3)
1. synchronous width modulation type induction heating equipment, it is characterized in that, comprise output circuit (10), high-frequency rectification shaping circuit (20), pulse modulation module (30), drive circuit (40), the current signal output end of described output circuit (10) connects the input of high-frequency rectification shaping circuit (20), the output of high-frequency rectification shaping circuit (20) connects the input of pulse modulation module (30), the output of pulse modulation module (30) connects the input of drive circuit (40), the output of drive circuit (40) connects the input of output circuit (10), and the current signal output end of described output circuit (10) also is connected with heating plate (50).
2. synchronous width modulation type induction heating equipment as claimed in claim 1, it is characterized in that, described pulse modulation module (30) comprises oscillator (301) and pulse modulation comparator (302), the synchronous end Tb of the output connection oscillator (301) of high-frequency rectification shaping circuit (20), the external capacitor end Ct of oscillator (301) connects the positive pole of pulse modulation comparator (302), the negative pole of pulse modulation comparator (302) connects control level signal In, and the output of pulse modulation comparator (302) connects the input of drive circuit (40); The external capacitor end Ct of oscillator (301) is by oscillating capacitor ground connection, and the outer meeting resistance end Rt of oscillator (301) is by oscillation resistance device ground connection.
3. synchronous width modulation type induction heating equipment as claimed in claim 1 is characterized in that, described output circuit (10) comprises two current signal output ends; High-frequency rectification shaping circuit (20) comprises bridge rectifier QD and amplifier comparator M1, two inputs of bridge rectifier QD are connected with two current signal output ends of output circuit (10), the negativing ending grounding of bridge rectifier QD output, the positive terminating resistor R1 of bridge rectifier QD output, the other end of resistance R 1 connects the negative pole of resistance R 2 and amplifier comparator M1, the other end ground connection of resistance R 2, the positive pole of amplifier comparator M1 connects the series connection contact of resistance R 3 and resistance R 4, the other end of resistance R 3 connects Vcc, the other end ground connection of resistance R 4, the output of amplifier comparator M1 connects the synchronous end Tb of pulse modulation module (30); The Vi end of described pulse modulation module (30) connects control level signal In, the two-way output of pulse modulation module (30) connects two inputs of drive circuit (40), the external capacitor end end Ct of pulse modulation module (30) is by oscillating capacitor ground connection, the outer meeting resistance end Rt of pulse modulation module (30) is by oscillation resistance device ground connection, the output GND ground connection of pulse modulation module (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320167379 CN203219529U (en) | 2013-04-07 | 2013-04-07 | Synchronous width modulation type induction heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320167379 CN203219529U (en) | 2013-04-07 | 2013-04-07 | Synchronous width modulation type induction heating device |
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| Publication Number | Publication Date |
|---|---|
| CN203219529U true CN203219529U (en) | 2013-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320167379 Expired - Lifetime CN203219529U (en) | 2013-04-07 | 2013-04-07 | Synchronous width modulation type induction heating device |
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| CN (1) | CN203219529U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103237375A (en) * | 2013-04-07 | 2013-08-07 | 广东鼎燊科技有限公司 | Synchronous width modulation type induction heating device |
-
2013
- 2013-04-07 CN CN 201320167379 patent/CN203219529U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103237375A (en) * | 2013-04-07 | 2013-08-07 | 广东鼎燊科技有限公司 | Synchronous width modulation type induction heating device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 518000 A 405, Da Bai Hui hi tech Industrial Park, deep salt road, Yantian District, Shenzhen, Guangdong Patentee after: GUANGDONG DINGSHEN YUNCHU TECHNOLOGY CO.,LTD. Address before: 518000 A 405, Da Bai Hui hi tech Industrial Park, deep salt road, Yantian District, Shenzhen, Guangdong Patentee before: GUANGDONG DINGSHEN TECHNOLOGY CO.,LTD. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 518000 Guangdong province Shenzhen city road salt Yantian District grand Parkway high tech Industrial Park A building 405 Patentee after: Guangdong Yiai cloud kitchen Technology Co.,Ltd. Address before: 518000 Guangdong province Shenzhen city road salt Yantian District grand Parkway high tech Industrial Park A building 405 Patentee before: GUANGDONG DINGSHEN YUNCHU TECHNOLOGY Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130925 |