CN217770403U - Resonance main frequency space radiation shielding and filtering circuit of electromagnetic heating device - Google Patents
Resonance main frequency space radiation shielding and filtering circuit of electromagnetic heating device Download PDFInfo
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- CN217770403U CN217770403U CN202220343293.3U CN202220343293U CN217770403U CN 217770403 U CN217770403 U CN 217770403U CN 202220343293 U CN202220343293 U CN 202220343293U CN 217770403 U CN217770403 U CN 217770403U
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Abstract
The utility model relates to an electromagnetic heating device's resonance dominant frequency space radiation shielding and filter circuit, it includes the solenoid radiation shielding body that is used for shielding and decay electromagnetic field and the filter circuit who is used for filtering solenoid radiation shielding body to return the interference signal of power alternating current output end, filter circuit includes the solenoid radiation shielding body, first filter inductance, second filter inductance, the function earthing terminal, the protection earthing terminal, first electric capacity, the second electric capacity, first wire and second wire, the solenoid radiation shielding body is connected with first filter inductance's one end, the first end and the function earthing terminal of second filter inductance are connected, the second end of second filter inductance is connected with the protection earthing terminal through the second wire. The utility model discloses a resonance dominant frequency space radiation shielding and filter circuit eliminate or weaken the electromagnetic radiation that electromagnetic heating device produced and bring healthy risk to the electrical safety and the device user of surrounding environment.
Description
Technical Field
The utility model relates to an electromagnetic heating device's technical field, in particular to electromagnetic heating device's resonance dominant frequency space radiation shielding and filter circuit.
Background
At present, an electromagnetic resonance circuit of an IGBT (insulated gate bipolar transistor) of an electromagnetic heating device usually adopts a parallel resonance mode or a series resonance mode, and when a resonance parameter for realizing high-power operation of the electromagnetic heating device is adopted, if the electromagnetic heating device is heated at maximum power, the IGBT may have the following problems: when the IGBT, the coil and the capacitor work in a resonance mode, the amplitude of a resonance main frequency space radiation electromagnetic field exceeds a limit value, and the electromagnetic field interference influences the electrical safety of the surrounding environment. And secondly, when the IGBT, the coil and the capacitor work in a resonance mode, the amplitude of a resonance main frequency space radiation electromagnetic field exceeds a limit value, and electromagnetic field interference can bring health risks to device users. Therefore, the circuit of the existing electromagnetic heating device needs to be further improved.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a resonance dominant frequency space radiation shielding and filter circuit of electromagnetic heating device safe in utilization, noiseless, that do not have magnetic radiation.
The purpose of the utility model is realized like this:
the utility model provides an electromagnetic heating device's resonance dominant frequency space radiation shielding and filter circuit, includes the solenoid radiation shielding body that is used for shielding and decay electromagnetic field and is used for filtering solenoid radiation shielding body to return to the filter circuit of the interference signal of power AC output end, filter circuit includes solenoid radiation shielding body, first filter inductance, second filter inductance, function earthing terminal, protection earthing terminal, first electric capacity, second electric capacity, first wire and second wire, solenoid radiation shielding body is connected with first filter inductance's one end, first filter inductance's the other end is connected with function earthing terminal through first wire, power AC output end includes L utmost point AC output end and N utmost point AC output end, the function earthing terminal is connected between first electric capacity and second electric capacity, first electric capacity, second electric capacity series connection are between L utmost point AC output end and N utmost point AC output end, and second filter inductance's first end is connected with the function earthing terminal, second filter inductance's second end is connected with the protection earthing terminal through the second wire.
The utility model can be further improved as follows.
First filter inductance is by first wire coiling forms, consequently the utility model discloses a low in production cost.
The second filter inductance is by the second wire coiling forms, consequently the utility model discloses a low in production cost.
The resonance main frequency space radiation shielding and filtering circuit of the electromagnetic heating device is suitable for alternating current input working voltage and frequency ranges from 80V/50HZ to 380V/50HZ or 80V/60HZ to 240V/60HZ.
The resonance dominant frequency space radiation shielding and filtering circuit of the electromagnetic heating device is suitable for shielding and attenuating electromagnetic fields with electromagnetic interference space radiation frequency range of 9K/HZ (hertz) to 1G/HZ (hertz).
The resonance main frequency space radiation shielding and filtering circuit of the electromagnetic heating device is suitable for the electromagnetic interference conduction disturbance frequency range from 9K/HZ (hertz) to 30M/HZ (hertz).
The electromagnetic coil radiation shielding body is an aluminum plate shielding body with a groove, and an electromagnetic coil panel of the electromagnetic heating device is arranged in the groove, so that the electromagnetic coil radiation shielding body has a good shielding effect on electromagnetic radiation of the electromagnetic coil panel.
The resonance dominant frequency space radiation shielding and filtering circuit of the electromagnetic heating device is suitable for a parallel resonance circuit or a series resonance circuit of the electromagnetic heating device.
The second end of the second filter inductor is connected with the shell of the electromagnetic heating device through a second lead, so that the shell of the electromagnetic heating device can also be used for filtering out noise waves generated when the electromagnetic coil panel works.
The shell of the electromagnetic heating device is made of non-metal materials or metal materials.
The beneficial effects of the utility model are as follows:
the utility model discloses a resonance dominant frequency space radiation shielding and filter circuit eliminate or weaken the electromagnetic radiation that electromagnetic heating device produced and bring healthy risk to the electrical safety and the device user of surrounding environment. Therefore, the electromagnetic heating device of the utility model is safe to use, free of interference and free of magnetic radiation.
Drawings
Fig. 1 is a control circuit diagram of the electromagnetic heating device of the present invention.
Fig. 2 is a circuit diagram of the resonance dominant frequency space radiation shielding and filtering circuit of the electromagnetic heating device of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples.
In a first embodiment, as shown in fig. 1 to 2, a control circuit of an electromagnetic heating device includes a commercial power filter circuit 1, a rectifier circuit 6, a power supply circuit 7, an IGBT control circuit 8, an electromagnetic coil panel L6, and a resonant dominant frequency space radiation shielding and filtering circuit 2, where the commercial power filter circuit 1 includes an L-pole ac output terminal P5, an N-pole ac output terminal P4, an L-pole ac input terminal P1, an N-pole ac input terminal P2, and a third filter inductor L3, a first input terminal of the third filter inductor L3 is connected to the L-pole ac input terminal P1, a second input terminal of the third filter inductor is connected to the N-pole ac input terminal P2, a first output terminal of the third filter inductor L3 is connected to the L-pole ac output terminal P5, and a second output terminal of the third filter inductor L3 is connected to the N-pole ac output terminal P4.
Resonance dominant frequency space radiation shielding and filter circuit 2 includes solenoid radiation shielding body 3, first filter inductance L1, second filter inductance L2, function earthing terminal P6, protection earthing terminal P3, first electric capacity CY2, second electric capacity CY1, first wire S1 and second wire S2, solenoid radiation shielding body 3 is connected with first filter inductance L1 'S one end, first filter inductance L1' S the other end is connected with function earthing terminal P6 through first wire S1, function earthing terminal P6 is connected between first electric capacity and second electric capacity, first electric capacity, second electric capacity series connection are between L utmost point AC output end P5 and N utmost point AC output end P4, and second filter inductance L2 'S first end is connected with the function earthing terminal, second filter inductance L2' S second end is connected with protection earthing terminal P3 through second wire S2.
As a more specific technical solution of the present invention.
Commercial power filter circuit 1 still includes piezo-resistor CNR, first resistance R1 and third electric capacity CX1, piezo-resistor CNR parallel connection is between L utmost point AC input end P1 and N utmost point AC input end P2, and third electric capacity CX1 parallel connection is between L utmost point AC input end P1 and N utmost point AC input end P2, first resistance R1 series connection is between L utmost point AC output end P5 and N utmost point AC output end P4, second electric capacity CY1 and first electric capacity series connection are between L utmost point AC output end P5, N utmost point AC output end P4.
The first filter inductor L1 is a collinear winding inductor, and the first filter inductor L1 is formed by winding a first lead S1.
The second filter inductor L2 is a collinear winding inductor, and the second filter inductor L2 is formed by winding the second lead S2.
The resonance main frequency space radiation shielding and filtering circuit of the electromagnetic heating device is suitable for alternating current input working voltage and frequency ranges from 80V/50HZ to 380V/50HZ or 80V/60HZ to 240V/60HZ.
The resonance main frequency space radiation shielding and filtering circuit of the electromagnetic heating device is suitable for shielding and attenuating electromagnetic fields with electromagnetic interference space radiation frequency range of 9K/HZ (hertz) to 1G/HZ (hertz).
The filter circuit is suitable for the electromagnetic interference conducted disturbance frequency range from 9K/HZ (hertz) to 30M/HZ (hertz).
The electromagnetic coil radiation shield 3 is an aluminum plate shield with a groove, and an electromagnetic coil disc of the electromagnetic heating device is arranged in the groove.
The third filter inductor L3 is a common mode inductor or a differential mode inductor.
The resonance dominant frequency space radiation shielding and filtering circuit of the electromagnetic heating device is suitable for a parallel resonance circuit or a series resonance circuit of the electromagnetic heating device.
And the second end of the second filter inductor is connected with the shell of the electromagnetic heating device through a second lead.
The shell of the electromagnetic heating device is made of non-metal materials or metal materials.
The utility model discloses a theory of operation is: when the electromagnetic heating device works, the electromagnetic coil panel L6 starts to heat the pot body 5, the magnetic field generated by the electromagnetic coil panel leaks magnetic flux outwards, the electromagnetic coil radiation shield body 3 shields most of leaked magnetic lines of force, and therefore the problem of electromagnetic radiation is solved, in addition, the electromagnetic coil radiation shield body 3 also converts magnetic energy into electromotive force so as to generate current, the current flows through the first lead S1 and the first filter inductor L1, the first filter inductor L1 has the functions of electromotive force attenuation and current limiting, most of current signals in the leaked magnetic field are consumed, most of noise waves in the magnetic field are filtered, the later current flows to the functional grounding end P6, in addition, the shell 4 of the electromagnetic heating device also generates electromotive force due to the leaked magnetic field, so that the current is generated, the shell 4 also generates heat, then the current flows to the functional grounding end P6 through the second lead S2, most of noise waves in the magnetic field are filtered by the second filter inductor L2, and electromagnetic interference is eliminated.
Claims (10)
1. The utility model provides an electromagnetic heating device's resonance dominant frequency space radiation shielding and filter circuit, characterized by, including the solenoid radiation shielding body that is used for shielding and decay electromagnetic field and the filter circuit who is used for filtering solenoid radiation shielding body to return the interfering signal of power AC output end, filter circuit includes solenoid radiation shielding body, first filter inductance, second filter inductance, function earthing terminal, protection earthing terminal, first electric capacity, second electric capacity, first wire and second wire, solenoid radiation shielding body is connected with the one end of first filter inductance, the other end of first filter inductance is connected with function earthing terminal through first wire, power AC output end includes L utmost point AC output end and N utmost point AC output end, the function earthing terminal is connected between first electric capacity and second electric capacity, first electric capacity, second electric capacity series connection are between L utmost point AC output end and N utmost point AC output end, and the first end of second filter inductance is connected with the function earthing terminal, the second end of second filter inductance is connected with protection earthing terminal through the second wire.
2. A resonant dominant frequency spatial radiation shielding and filtering circuit for an electromagnetic heating device as claimed in claim 1, wherein the filtering circuit is adapted to shield and attenuate electromagnetic fields with spatial radiation frequencies of electromagnetic interference in the range of 9K/HZ (Hertz) to 1G/HZ (Hertz).
3. A resonant dominant frequency spatial radiation shield and filter circuit for an electromagnetic heating apparatus as claimed in claim 1, wherein the filter circuit is adapted for electromagnetic interference conducted disturbance frequencies in the range of 9K/HZ (Hertz) to 30M/HZ (Hertz).
4. The resonant dominant frequency space radiation shield and filter circuit of an electromagnetic heating apparatus of claim 1, wherein the first filter inductor is wound from the first wire.
5. The resonant dominant frequency space radiation shield and filter circuit of an electromagnetic heating apparatus of claim 1, wherein the second filter inductor is wound from the second wire.
6. A resonant dominant frequency spatial radiation shielding and filtering circuit for an electromagnetic heating device as claimed in claim 1, wherein the filtering circuit is adapted for AC input operating voltages and frequencies in the range of 80V/50HZ-380V/50HZ or 80V/60HZ to 240V/60HZ.
7. The resonant dominant frequency space radiation shield and filter circuit of an electromagnetic heating apparatus of claim 1, wherein the electromagnetic coil radiation shield is an aluminum plate shield having a recess, and an electromagnetic coil disk of the electromagnetic heating apparatus is disposed in the recess.
8. The resonant primary frequency space radiation shielding and filtering circuit of an electromagnetic heating apparatus of claim 1, wherein the resonant primary frequency space radiation shielding and filtering circuit of an electromagnetic heating apparatus is adapted to a parallel resonant circuit or a series resonant circuit of an electromagnetic heating apparatus.
9. The resonant dominant frequency space radiation shield and filter circuit of an electromagnetic heating apparatus of claim 1, wherein the second end of the second filter inductor is connected to the housing of the electromagnetic heating apparatus by a second wire.
10. The resonant dominant frequency space radiation shield and filter circuit of the electromagnetic heating apparatus of claim 9, wherein the housing of the electromagnetic heating apparatus is made of a non-metallic material or a metallic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220343293.3U CN217770403U (en) | 2022-02-19 | 2022-02-19 | Resonance main frequency space radiation shielding and filtering circuit of electromagnetic heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220343293.3U CN217770403U (en) | 2022-02-19 | 2022-02-19 | Resonance main frequency space radiation shielding and filtering circuit of electromagnetic heating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217770403U true CN217770403U (en) | 2022-11-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220343293.3U Active CN217770403U (en) | 2022-02-19 | 2022-02-19 | Resonance main frequency space radiation shielding and filtering circuit of electromagnetic heating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217770403U (en) |
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2022
- 2022-02-19 CN CN202220343293.3U patent/CN217770403U/en active Active
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