CN204795665U - Electromagnetic heating system and electromagnetic heating system's power supply circuit - Google Patents
Electromagnetic heating system and electromagnetic heating system's power supply circuit Download PDFInfo
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- CN204795665U CN204795665U CN201520503704.0U CN201520503704U CN204795665U CN 204795665 U CN204795665 U CN 204795665U CN 201520503704 U CN201520503704 U CN 201520503704U CN 204795665 U CN204795665 U CN 204795665U
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Abstract
The utility model discloses an electromagnetic heating system's power supply circuit and the electromagnetic heating system who has it, power supply circuit includes: the rectifier bridge, current -limiting filtering unit, current -limiting filtering unit carries out current -limiting filtering processing in order to obtain the second DC voltage to the first DC voltage of rectifier bridge output, switching power supply chip, switching power supply chip carry out high frequency copped wave to the second DC voltage to be handled in order to obtain pulse voltage, energy storage inductor group, energy storage inductor group include to have the common port between a plurality of energy storage inductance by a plurality of energy storage inductance, and energy storage inductor group alternaties into multichannel DC power supply through a plurality of energy storage inductance with pulse voltage and exports, and multichannel DC power supply passes through, and the common port is related is in the same place, power supply feedback Unit, power supply feedback Unit feedbacks the switching power supply chip with multichannel DC power supply's voltage fluctuation to make the switching power supply chip adjust multichannel DC power supply's voltage simultaneously. This power supply circuit can adjust multichannel DC power supply's voltage simultaneously and export the galvanic current and press.
Description
Technical field
The utility model relates to electromagnetic heating technique field, particularly a kind of power circuit of electromagnetic heating system and a kind of electromagnetic heating system.
Background technology
In electromagnetic oven electric-control system, usual employing BUCK or flyback topology structure circuit convert single high voltage source IC (electric main converts direct current to) to DC power supply that voltage is 18V, then after the voltage stabilizing of voltage stabilizing chip, exports the DC power supply that comparatively stable voltage is 5V through transformer transformation.
But the interaction capabilities of the DC power supply of 18V and the DC power supply of 5V is poor in this power-supply system.Such as, the DC power supply of 18V powers mainly to the blower fan in electromagnetic oven, when blower fan quits work, when namely system is in light load operation mode, voltage is that the load capacity of the DC power supply of 5V is extremely low, when electric current is more than 150mA, 5V voltage will drop to below 3V rapidly, causes power-supply system power supply instability, thus causes the button of electromagnetic oven insensitive, even there is the phenomenon that electromagnetic oven resets, affect user and use.
Utility model content
The utility model is intended to solve one of technical problem in correlation technique at least to a certain extent.For this reason, an object of the present utility model is that proposition is a kind of and can regulates the voltage of multi-channel dc power supply and the power circuit of the electromagnetic heating system of the direct voltage of stable output simultaneously.
Another object of the present utility model is to propose a kind of electromagnetic heating system.
For achieving the above object, the utility model proposes a kind of power circuit of electromagnetic heating system on the one hand, comprising: for carrying out the rectifier bridge of full-wave rectification to the electric main of input; Current limliting filter unit, described current limliting filter unit is connected with described rectifier bridge, and described current limliting filter unit carries out current limliting filtering process to obtain the second direct voltage to the first direct voltage that described rectifier bridge exports; Switching power source chip, described switching power source chip is connected with described current limliting filter unit, and described switching power source chip carries out high frequency chopping process to obtain pulse voltage to described second direct voltage; Energy storage inductor group, described energy storage inductor group comprises multiple energy storage inductor, between described multiple energy storage inductor, there is common port, described pulse voltage is transformed into multi-channel dc power supply by described multiple energy storage inductor and exports by described energy storage inductor group, and described multi-channel dc power supply is associated together by described common port; Power supply feedback unit, described power supply feedback unit is connected with described switching power source chip with described energy storage inductor group respectively, described power supply feedback unit powers to described switching power source chip, and the voltage fluctuation of described multi-channel dc power supply is fed back to described switching power source chip, with the voltage making described switching power source chip regulate described multi-channel dc power supply simultaneously.
According to the power circuit of the electromagnetic heating system of the utility model embodiment, the electric main of rectifier bridge to input carries out full-wave rectification to export the first direct voltage, current limliting filter unit carries out current limliting filtering process to obtain the second direct voltage to the first direct voltage, switching power source chip carries out high frequency chopping process to obtain pulse voltage to the second direct voltage, pulse voltage is transformed into multi-channel dc power supply by multiple energy storage inductor and exports by energy storage inductor group, and multi-channel dc power supply is associated together by common port, power supply feedback unit is powered to switching power source chip, and the voltage fluctuation of multi-channel dc power supply is fed back to switching power source chip, with the voltage making switching power source chip regulate multi-channel dc power supply simultaneously, improve the interactivity of the voltage of multi-channel dc power supply, and this power circuit can the direct voltage of stable output, improve the stability of system.
Particularly, described multiple energy storage inductor is the first energy storage inductor and the second energy storage inductor, one end of described first energy storage inductor is connected with the first end of described power supply feedback unit, and export the first DC power supply, the other end of described first energy storage inductor is connected with one end of described second energy storage inductor, between the other end of described first energy storage inductor and one end of described second energy storage inductor, there is first node, described first node is connected with the second end of described power supply feedback unit, and the other end of described second energy storage inductor exports the second DC power supply.
Wherein, the voltage of described first DC power supply and the voltage of described second DC power supply are multiple proportion.
Particularly, described power supply feedback unit comprises: the first diode, and the anode of described first diode is connected with one end of described first energy storage inductor, and the negative electrode of described first diode is connected with the feeder ear of described switching power source chip; First voltage-stabiliser tube, the anode of described first voltage-stabiliser tube is connected with the feedback end of described switching power source chip, and the negative electrode of described first voltage-stabiliser tube is connected with the negative electrode of described first diode; First electric capacity, one end of described first electric capacity is connected with the feedback end of described switching power source chip with the anode of described first voltage-stabiliser tube respectively, and the other end of described first electric capacity is connected with the output of described first node with described switching power source chip; Second electric capacity, one end of described second electric capacity is connected with the negative electrode of described first voltage-stabiliser tube with the negative electrode of described first diode respectively, and the other end of described second electric capacity is connected with the output of described switching power source chip with the other end of described first node, described first electric capacity respectively.
Particularly, the power circuit of above-mentioned electromagnetic heating system, also comprise: fly-wheel diode, the negative electrode of described fly-wheel diode is connected with the output of described first node with described switching power source chip respectively, the anode of described fly-wheel diode is connected with the other end of the second diode with described second energy storage inductor by the first filter capacitor, and the plus earth of described fly-wheel diode.
Particularly, the power circuit of above-mentioned electromagnetic heating system, also comprise: voltage-stabilizing device, the input of described voltage-stabilizing device is connected with one end of described first filter capacitor with the negative electrode of described diode respectively, the other end ground connection of described first filter capacitor, described voltage-stabilizing device generates the 3rd DC power supply according to described second DC power supply and exports, and wherein, the voltage of described 3rd DC power supply is less than the voltage of described second DC power supply; Second filter capacitor, one end of described second filter capacitor is connected with the output of described voltage-stabilizing device, the other end ground connection of described second filter capacitor, and described second filter capacitor carries out filtering process to described 3rd DC power supply.
For achieving the above object, the utility model proposes a kind of electromagnetic heating system on the other hand, and it comprises the power circuit of above-mentioned electromagnetic heating system.
This electromagnetic heating system, by the power circuit of above-mentioned electromagnetic heating system, can improve the interactivity of the voltage of multi-channel dc power supply and the direct voltage of stable output, improve the stability of system.
Accompanying drawing explanation
Fig. 1 is the block diagram of the power circuit of electromagnetic heating system according to the utility model embodiment.
Fig. 2 is the circuit diagram of the power circuit of electromagnetic heating system according to the utility model embodiment.
Fig. 3 is the circuit diagram of the power circuit of electromagnetic heating system according to another embodiment of the utility model.
Embodiment
Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.
Power circuit and the electromagnetic heating system of the electromagnetic heating system of the utility model embodiment are described with reference to the accompanying drawings.
Fig. 1 is the block diagram of the power circuit of electromagnetic heating system according to the utility model embodiment.As shown in Figure 1, the power circuit of this electromagnetic heating system comprises rectifier bridge 10, current limliting filter unit 20, switching power source chip 30, energy storage inductor group 40 and power supply feedback unit 50.
Wherein, the electric main of rectifier bridge 10 to input carries out full-wave rectification.Current limliting filter unit 20 is connected with rectifier bridge 10, and the first direct voltage that current limliting filter unit 20 pairs of rectifier bridges 10 export carries out current limliting filtering process to obtain the second direct voltage.Switching power source chip 30 is connected with current limliting filter unit 20, and switching power source chip 30 carries out high frequency chopping process to obtain pulse voltage to the second direct voltage.Energy storage inductor group 40 comprises multiple energy storage inductor, has common port between multiple energy storage inductor, and pulse voltage is transformed into multi-channel dc power supply by multiple energy storage inductor and exports by energy storage inductor group 40, and multi-channel dc power supply is associated together by common port.Power supply feedback unit 50 is connected with switching power source chip 30 with energy storage inductor group 40 respectively, power supply feedback unit 50 powers to switching power source chip 30, and the voltage fluctuation of multi-channel dc power supply is fed back to switching power source chip 30, with the voltage making switching power source chip 30 regulate multi-channel dc power supply simultaneously.
According to an embodiment of the present utility model, as shown in Figure 2, multiple energy storage inductor is the first energy storage inductor L1 and the second energy storage inductor L2, one end of first energy storage inductor L1 is connected with the first end of power supply feedback unit 50, and export the first DC power supply, the other end of the first energy storage inductor L1 is connected with one end of the second energy storage inductor L2, between the other end of the first energy storage inductor L1 and one end of the second energy storage inductor L2, there is first node J1, first node J1 is connected with the second end of power supply feedback unit 50, and the other end of the second energy storage inductor L2 exports the second DC power supply.
Wherein, according to an embodiment of the present utility model, the voltage of the first DC power supply and the voltage of the second DC power supply are multiple proportion.
Specifically, as shown in Figure 2, the pulse voltage that switching power source chip 30 exports is transformed into the first DC power supply V1 and exports by the first energy storage inductor L1, the first stable DC power supply V1 is obtained after the 4th electric capacity C4 filtering, the voltage of this DC power supply can be 18V (being generally 18V in electromagnetic heating system), power to give the blower fan in electromagnetic heating system and switching device such as the critical pieces such as IGBT (InsulatedGateBipolarTransistor, insulated gate bipolar transistor).Simultaneously, the pulse voltage that switching power source chip 30 exports is transformed to the second DC power supply V2 and exports by the second energy storage inductor L2, after the second diode D2 and the first filter capacitor CL1, obtain the second stable DC power supply V2, the voltage of this DC power supply can be 8V.
According to an embodiment of the present utility model, as shown in Figure 2, power supply feedback unit 50 comprises the first diode D1, first voltage-stabiliser tube Z1, there is the first electric capacity C1 and the second electric capacity C2 of filter action, wherein, the anode of the first diode D1 is connected with one end of the first energy storage inductor L1, the negative electrode of the first diode D1 is connected with the feeder ear of switching power source chip 30, the anode of the first voltage-stabiliser tube Z1 is connected with the feedback end of switching power source chip 30, the negative electrode of the first voltage-stabiliser tube Z1 is connected with the negative electrode of the first diode D1, one end of first electric capacity C1 is connected with the feedback end of switching power source chip 30 with the anode of the first voltage-stabiliser tube Z1 respectively, the other end of the first electric capacity C1 is connected with the output of switching power source chip 30 with first node J1 respectively, one end of second electric capacity C2 is connected with the negative electrode of the first voltage-stabiliser tube Z1 with the negative electrode of the first diode D1 respectively, the other end of the second electric capacity C2 respectively with first node J1, the other end of the first electric capacity C1 is connected with the output of switching power source chip 30.
That is, through first energy storage inductor L1 export the first DC power supply V1 not only as the power supply of switching power source chip 30, also as feedback signal back to switching power source chip 30 feedback end, so that switching power source chip 30 can detect in real time and adjust the DC power supply exported, ensure the DC power supply of stable output.Be understandable that, because the first energy storage inductor L1 and the second energy storage inductor L2 has common port, when giving an energy storage inductor charging in the first energy storage inductor L1 and the second energy storage inductor L2 when switching power source chip 30, another energy storage inductor also charges simultaneously, because the first energy storage inductor L1 is different with the coil turn of the second energy storage inductor L2, the different DC power supply of voltage therefore can be obtained as the first DC power supply V1 and the second DC power supply V2.When fluctuation occurs the voltage of the first DC power supply V1, the first DC power supply V1 feeds back to switching power source chip 30 through the first diode D1 and the first voltage-stabiliser tube Z1, is regulated by switching power source chip 30; Because the first DC power supply V1 and the second DC power supply V2 is connected in parallel by common port, therefore when fluctuation occurs the voltage of the second DC power supply V2, its voltage fluctuation will feed back to the first energy storage inductor L1, feed back to switching power source chip 30 by the first energy storage inductor L1, regulated by switching power source chip 30.
According to an embodiment of the present utility model, as shown in Figure 2, the power circuit of above-mentioned electromagnetic heating system also comprises sustained diode 5, the negative electrode of sustained diode 5 is connected with the output of switching power source chip 30 with first node J1 respectively, the anode of sustained diode 5 is connected with the other end of the second energy storage inductor L2 with the second diode D2 by the first filter capacitor CL1, and the plus earth GND of sustained diode 5.When the device of switching power source chip 30 inside turns off, carry out afterflow by sustained diode 5, to provide discharge loop to the inner multiple energy storage inductor of energy storage inductor group 40.
According to another embodiment of the present utility model, as shown in Figure 3, the power circuit of above-mentioned electromagnetic heating system also comprises: voltage-stabilizing device U1 and the second filter capacitor CL2, wherein, the input of voltage-stabilizing device U1 is connected with one end of the first filter capacitor CL1 with the negative electrode of the second diode D2 respectively, the other end ground connection GND of the first filter capacitor CL1, voltage-stabilizing device U1 generates the 3rd DC power supply V3 according to the second DC power supply V2 and exports, wherein, the voltage of the 3rd DC power supply V3 is less than the voltage of the second DC power supply V2, one end of second filter capacitor CL2 is connected with the output of voltage-stabilizing device U1, the other end ground connection GND of the second filter capacitor CL2, second filter capacitor CL2 carries out filtering process to the 3rd DC power supply V3.
Briefly, step-down and filtering can be carried out, with the 5V voltage of stable output by voltage-stabilizing device U1 and the second filter capacitor CL2 to the voltage of the second DC power supply V2 that energy storage inductor group 40 exports such as 8V.
In embodiments more of the present utility model, as shown in Figure 3, the power circuit of above-mentioned electromagnetic heating system can also comprise power conversion unit 60, power conversion unit 60 comprises the second resistance R2 and the 5th electric capacity C5 of series connection, wherein, one end of second resistance R2 respectively with one end of the first energy storage inductor L1, one end of 4th electric capacity C4 is connected, the other end of the second resistance R2 is connected with one end of the 5th electric capacity C5, the other end ground connection GND of the 5th electric capacity C5, between the other end of the second resistance R2 and one end of the 5th electric capacity C5, there is the 3rd node J3, and as the output of the 4th DC power supply V4.
In addition, as shown in Figure 2 or Figure 3, rectifier bridge 10 comprises the 3rd diode D3 and the 4th diode D4, wherein, 3rd diode D3 is connected with wherein one end of electric main respectively with the anode of the 4th diode D4,3rd diode D3 is connected with the negative electrode of the 4th diode D4, and electric main exports the first direct voltage after the 3rd diode D3 and the 4th diode D4 full-wave rectification.
Current limliting filter unit 20 comprises the first resistance R1 and the 3rd electric capacity C3 of series connection, wherein, one end of first resistance R1 is connected with the output of rectifier bridge 10, the other end of the first resistance R1 is connected with one end of the 3rd electric capacity C3, the other end ground connection GND of the 3rd electric capacity C3, have Section Point J2 between the other end of the first resistance R1 and one end of the 3rd electric capacity C3, Section Point J2 is connected with switching power source chip 30.The first direct voltage that rectifier bridge 10 exports is after the first resistance R1 and the 3rd electric capacity C3 current limliting filtering, obtain the second direct voltage that voltage compare is high and stable, this direct voltage is that switching power source chip 30 such as VIPER12 powers, and switching power source chip 30 carries out high frequency chopping process to obtain pulse voltage to the second direct voltage.
Illustrate that switching power source chip 30 regulates the operation principle of the voltage of multi-channel dc power supply simultaneously below in conjunction with Fig. 3.
When there is fluctuation as 18V in the voltage of the first DC power supply V1, voltage such as the 18V of the first DC power supply V1 directly feeds back to switching power source chip 30 by the first diode D1 and the first voltage-stabiliser tube Z1, switching power source chip 30 by the pulse duration of regulating impulse voltage to obtain the first stable DC power supply V1.In addition, because the coil turn of the first energy storage inductor L1 and the coil turn of the second energy storage inductor L2 are multiple proportion, and the first energy storage inductor L1 and the second energy storage inductor L2 has common port, therefore, while the first DC power supply V1 is regulated, also can obtain the second stable DC power supply V2.
And when the voltage of the second DC power supply V2, as 8V, fluctuation occurs, because the first energy storage inductor L1 and the second energy storage inductor L2 has common port, therefore, the voltage fluctuation of the second DC power supply V2 will feed back on the first energy storage inductor L1, switching power source chip 30 can be fed back to after the first diode D1 and the first voltage-stabiliser tube Z1, switching power source chip 30 by the pulse duration of regulating impulse voltage to obtain the second stable DC power supply V2.Because the first DC power supply V1 and the second DC power supply V2 is more stable, therefore, the 3rd DC power supply V3 and the 4th DC power supply V4 is also more stable.
To sum up, as long as the multi-channel dc power supply Zhong mono-tunnel DC power supply that energy storage inductor group exports fluctuates, voltage fluctuation signal feeds back in switching power source chip by capital, PWM adjustment is carried out according to feedback signal by switching power source chip, thus make the multi-channel dc power supply of output more stable, and greatly improve the interacting strip loading capability of multi-channel dc power supply.
According to the power circuit of the electromagnetic heating system of the utility model embodiment, the electric main of rectifier bridge to input carries out full-wave rectification to export the first direct voltage, current limliting filter unit carries out current limliting filtering process to obtain the second direct voltage to the first direct voltage, switching power source chip carries out high frequency chopping process to obtain pulse voltage to the second direct voltage, pulse voltage is transformed into multi-channel dc power supply by many group inductance and exports by transformer, the voltage of multi-channel dc power supply is fed back to switching power source chip by feedback unit simultaneously, with the voltage making switching power source chip regulate multi-channel dc power supply simultaneously, improve the interactivity of the voltage of multi-channel dc power supply, and this power circuit can the direct voltage of stable output, improve the stability of system.
In addition, embodiment of the present utility model also proposed a kind of electromagnetic heating system, and it comprises the power circuit of above-mentioned electromagnetic heating system.
This electromagnetic heating system, by the power circuit of above-mentioned electromagnetic heating system, can improve the interactivity of the voltage of multi-channel dc power supply and the direct voltage of stable output, improve the stability of system.
In description of the present utility model, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In description of the present utility model, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the utility model, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, the concrete meaning of above-mentioned term in the utility model can be understood as the case may be.
In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary indirect contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this specification or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and described embodiment of the present utility model above, be understandable that, above-described embodiment is exemplary, can not be interpreted as restriction of the present utility model, those of ordinary skill in the art can change above-described embodiment, revises, replace and modification in scope of the present utility model.
Claims (7)
1. a power circuit for electromagnetic heating system, is characterized in that, comprising:
For carrying out the rectifier bridge of full-wave rectification to the electric main of input;
Current limliting filter unit, described current limliting filter unit is connected with described rectifier bridge, and described current limliting filter unit carries out current limliting filtering process to obtain the second direct voltage to the first direct voltage that described rectifier bridge exports;
Switching power source chip, described switching power source chip is connected with described current limliting filter unit, and described switching power source chip carries out high frequency chopping process to obtain pulse voltage to described second direct voltage;
Energy storage inductor group, described energy storage inductor group comprises multiple energy storage inductor, between described multiple energy storage inductor, there is common port, described pulse voltage is transformed into multi-channel dc power supply by described multiple energy storage inductor and exports by described energy storage inductor group, and described multi-channel dc power supply is associated together by described common port;
Power supply feedback unit, described power supply feedback unit is connected with described switching power source chip with described energy storage inductor group respectively, described power supply feedback unit powers to described switching power source chip, and the voltage fluctuation of described multi-channel dc power supply is fed back to described switching power source chip, with the voltage making described switching power source chip regulate described multi-channel dc power supply simultaneously.
2. the power circuit of electromagnetic heating system as claimed in claim 1, it is characterized in that, described multiple energy storage inductor is the first energy storage inductor and the second energy storage inductor, one end of described first energy storage inductor is connected with the first end of described power supply feedback unit, and export the first DC power supply, the other end of described first energy storage inductor is connected with one end of described second energy storage inductor, between the other end of described first energy storage inductor and one end of described second energy storage inductor, there is first node, described first node is connected with the second end of described power supply feedback unit, the other end of described second energy storage inductor exports the second DC power supply.
3. the power circuit of electromagnetic heating system as claimed in claim 2, it is characterized in that, the voltage of described first DC power supply and the voltage of described second DC power supply are multiple proportion.
4. the power circuit of electromagnetic heating system as claimed in claim 2, it is characterized in that, described power supply feedback unit comprises:
First diode, the anode of described first diode is connected with one end of described first energy storage inductor, and the negative electrode of described first diode is connected with the feeder ear of described switching power source chip;
First voltage-stabiliser tube, the anode of described first voltage-stabiliser tube is connected with the feedback end of described switching power source chip, and the negative electrode of described first voltage-stabiliser tube is connected with the negative electrode of described first diode;
First electric capacity, one end of described first electric capacity is connected with the feedback end of described switching power source chip with the anode of described first voltage-stabiliser tube respectively, and the other end of described first electric capacity is connected with the output of described switching power source chip with the described first node of difference;
Second electric capacity, one end of described second electric capacity is connected with the negative electrode of described first voltage-stabiliser tube with the negative electrode of described first diode respectively, and the other end of described second electric capacity is connected with the output of described switching power source chip with the other end of described first node, described first electric capacity respectively.
5. the power circuit of electromagnetic heating system as claimed in claim 4, is characterized in that, also comprise:
Fly-wheel diode, the negative electrode of described fly-wheel diode is connected with the output of described first node with described switching power source chip respectively, the anode of described fly-wheel diode is connected with the other end of the second diode with described second energy storage inductor by the first filter capacitor, and the plus earth of described fly-wheel diode.
6. the power circuit of electromagnetic heating system as claimed in claim 5, is characterized in that, also comprise:
Voltage-stabilizing device, the input of described voltage-stabilizing device is connected with one end of described first filter capacitor with the negative electrode of described second diode respectively, the other end ground connection of described first filter capacitor, described voltage-stabilizing device generates the 3rd DC power supply according to described second DC power supply and exports, wherein, the voltage of described 3rd DC power supply is less than the voltage of described second DC power supply;
Second filter capacitor, one end of described second filter capacitor is connected with the output of described voltage-stabilizing device, the other end ground connection of described second filter capacitor, and described second filter capacitor carries out filtering process to described 3rd DC power supply.
7. an electromagnetic heating system, is characterized in that, comprises the power circuit of the electromagnetic heating system according to any one of claim 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520503704.0U CN204795665U (en) | 2015-07-13 | 2015-07-13 | Electromagnetic heating system and electromagnetic heating system's power supply circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520503704.0U CN204795665U (en) | 2015-07-13 | 2015-07-13 | Electromagnetic heating system and electromagnetic heating system's power supply circuit |
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| CN204795665U true CN204795665U (en) | 2015-11-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115622418A (en) * | 2022-12-15 | 2023-01-17 | 无锡芯朋微电子股份有限公司 | Multi-output switching power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115622418A (en) * | 2022-12-15 | 2023-01-17 | 无锡芯朋微电子股份有限公司 | Multi-output switching power supply |
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