CN217088200U - Improved resonance dominant frequency space radiation shielding and filtering circuit of electromagnetic heating device - Google Patents
Improved resonance dominant frequency space radiation shielding and filtering circuit of electromagnetic heating device Download PDFInfo
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- CN217088200U CN217088200U CN202220343292.9U CN202220343292U CN217088200U CN 217088200 U CN217088200 U CN 217088200U CN 202220343292 U CN202220343292 U CN 202220343292U CN 217088200 U CN217088200 U CN 217088200U
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Abstract
The utility model relates to an electromagnetic heating device's improvement 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 interfering signal of power alternating current output end, filter circuit includes first filter inductance, the function earthing terminal, first electric capacity, second electric capacity and first 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 the one end of first resistance through first wire, the other end and the function earthing terminal of first resistance are connected. The utility model discloses an improve resonance dominant frequency space radiation shielding and filter circuit and 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 improvement 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 an electromagnetic heating device's safe in utilization, noiseless, no magnetic radiation's improvement resonance dominant frequency space radiation shielding and filter circuit.
The purpose of the utility model is realized like this:
an improved resonance main frequency space radiation shielding and filtering circuit of an electromagnetic heating device comprises an electromagnetic coil radiation shielding body for shielding and attenuating an electromagnetic field and a filtering circuit for filtering an interference signal returned from the electromagnetic coil radiation shielding body to an alternating current output end of a power supply, the filter circuit comprises a first filter inductor, a functional ground terminal, a first resistor, a first capacitor, a second capacitor and a first lead, the electromagnetic coil radiation shield is connected with one end of a first filter inductor, the other end of the first filter inductor is connected with one end of a first resistor through a first lead, the other end of the first resistor is connected with a functional grounding end, the power supply alternating current output end comprises an L-pole alternating current output end and an N-pole alternating current output end, the functional grounding end is connected between the first capacitor and the second capacitor, and the first capacitor and the second capacitor are connected between the L-pole alternating current output end and the N-pole alternating current output end in series.
The utility model can be further improved as follows.
First filter inductance is the collineation coiling inductance, first filter inductance be by first 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/60 HZ.
The filter circuit is suitable for shielding and attenuating electromagnetic fields with electromagnetic interference space radiation frequency ranging from 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 of 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 utility model discloses still include the second wire, electromagnetic heating device's shell is connected with the function earthing terminal through the second wire, electromagnetic heating device's shell is made by non-metallic material or metal material, and consequently electromagnetic heating device's shell also can be used to filter out the clutter of electromagnetic coil panel during operation.
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 utility model has the advantages as follows:
the utility model discloses an improve resonance dominant frequency space radiation shielding and filter circuit and 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 improved 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 an improved resonant dominant frequency space radiation shielding and filtering circuit 2, where the commercial power filter circuit 1 includes an L-pole ac input end P1, an N-pole ac input end P2, an L-pole ac output end P5, an N-pole ac output end P4, and a second filter inductor L3, a first input end of the second filter inductor L3 is connected to the L-pole ac input end P1, a second input end of the second filter inductor L3 is connected to the N-pole ac input end P2, a first output end of the second filter inductor L3 is connected to the L-pole ac output end P5, a second output end of the second filter inductor L3 is connected to the N-pole ac output end P4, and the improved resonant dominant frequency space radiation shielding and filtering circuit 2 includes an electromagnetic coil radiation shielding body for shielding and attenuating an electromagnetic field radiation shielding body 3 and a filter circuit for filtering out interference signals returned from the electromagnetic coil radiation shield to the alternating current output end of the power supply, the filter circuit comprises a first filter inductor L1, a first capacitor CY2, a first resistor R1, a second capacitor CY1, a first conductor S1, a functional ground P6 and a second conductor S2, the electromagnetic coil radiation shield 3 is connected with one end of a first filter inductor L1, the other end of the first filter inductor L1 is connected with one end of a first lead and a first resistor R1 through a first lead S1, the other end of the first resistor R1 is connected with a functional grounding end, the power supply alternating current output end comprises an L pole alternating current output end P5 and an N pole alternating current output end P4, the functional ground terminal is connected between the first capacitor CY2 and the second capacitor CY1, and the first capacitor CY2 and the second capacitor CY1 are connected in series between the L-pole alternating current output terminal P5 and the N-pole alternating current output terminal P4.
As a more specific technical solution of the present invention.
Commercial power filter circuit 1 still includes piezo-resistor CNR, second resistance R2 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, third electric capacity CX1 parallel connection is between L utmost point ac input end P1 and N utmost point ac input end P2, second filter inductance L3's first input and L utmost point ac input end P1 are connected, second filter inductance L3's second input and N utmost point ac input end P2 are connected, second filter inductance L3's first output and L utmost point ac output end P5 are connected, second filter inductance L3's second output and N utmost point ac output end P4 are connected, second resistance R2 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 CY2 series connection are at L utmost point ac output end P5, Between the N pole ac output terminals P4.
The first filter inductor is a collinear winding inductor, and the first filter inductor L1 is formed by winding the first lead.
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/60 HZ.
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 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 panel 9 of the electromagnetic heating device is arranged in the groove.
The second filter inductor L3 is a common mode inductor or a differential mode inductor.
The shell 4 of the electromagnetic heating device is connected with a functional grounding end through a second lead S2, and the shell 4 of the electromagnetic heating device is made of non-metal materials or metal materials.
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 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 3 shields most of the leaked magnetic lines of force, and further solves the problem of electromagnetic radiation, in addition, the electromagnetic coil radiation shield 3 also converts magnetic energy into electromotive force, so as to generate induced current, the current flows through the first lead S1 and the first filter inductor L1, the first filter inductor L1 and the first resistor R1 have the function of attenuating electromotive force, so as to consume most of current signals in the leaked magnetic field, filter most of noise in the magnetic field, the subsequent current flows to the functional grounding end P6, and then is exchanged and converged to the alternating current output filter circuit through the first capacitor CY2 and the second capacitor CY1, in addition, the shell 4 of the electromagnetic heating device also generates electromotive force due to the leaked magnetic field, thereby generating an induced current to generate heat, filtering out most of the noise in the magnetic field, eliminating the electromagnetic interference, and then the current flows to the functional ground P6 through the second wire S2.
Claims (9)
1. The utility model provides an electromagnetic heating device's improvement 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 the interfering signal that the solenoid radiation shielding body returned to power AC output, filter circuit includes first filter inductance, function earthing terminal, first resistance, first electric capacity, second electric capacity and first 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 the one end of first resistance through first wire, the other end and the function earthing terminal of first resistance are connected, 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, The second capacitor is connected in series between the L-pole alternating current output end and the N-pole alternating current output end.
2. An improved resonant dominant frequency spatial radiation shielding and filtering circuit for an electromagnetic heating apparatus as claimed in claim 1, wherein said filtering circuit is adapted to shield and attenuate electromagnetic interference spatial radiation in the frequency range of 9K/HZ to 1G/HZ.
3. An improved resonant dominant frequency spatial radiation shield and filter circuit for an electromagnetic heating apparatus as claimed in claim 1 wherein said filter circuit is adapted for emi conducted disturbance frequencies in the range of 9K/HZ to 30M/HZ.
4. An improved resonant dominant frequency space radiation shield and filter circuit for an electromagnetic heating apparatus as claimed in claim 1 wherein said first filter inductor is wound from said first wire.
5. An improved resonant dominant frequency spatial radiation shield and filter circuit for an electromagnetic heating apparatus as claimed in claim 1 wherein said filter circuit is adapted for ac input operating voltages and frequencies in the range of 80V/50HZ-380V/50HZ or 80V/60HZ to 240V/60 HZ.
6. The improved resonant dominant frequency space radiation shield and filter circuit of the electromagnetic heating apparatus of claim 1, wherein the electromagnetic coil radiation shield is an aluminum plate shield having a recess, and wherein the electromagnetic coil disk of the electromagnetic heating apparatus is disposed within the recess.
7. The improved resonant dominant frequency space radiation shield and filter circuit of an electromagnetic heating apparatus of claim 1, further comprising a second wire, wherein the housing of the electromagnetic heating apparatus is connected to a functional ground via the second wire.
8. The improved resonant dominant frequency space radiation shield and filter circuit of the electromagnetic heating apparatus of claim 7, wherein the housing of the electromagnetic heating apparatus is made of a non-metallic material or a metallic material.
9. An improved resonant dominant frequency space radiation shield and filter circuit for an electromagnetic heating apparatus as claimed in claim 1 wherein the resonant dominant frequency space radiation shield and filter circuit of the electromagnetic heating apparatus is adapted for use in a parallel resonant circuit or a series resonant circuit of an electromagnetic heating apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220343292.9U CN217088200U (en) | 2022-02-19 | 2022-02-19 | Improved resonance dominant frequency space radiation shielding and filtering circuit of electromagnetic heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220343292.9U CN217088200U (en) | 2022-02-19 | 2022-02-19 | Improved resonance dominant frequency space radiation shielding and filtering circuit of electromagnetic heating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217088200U true CN217088200U (en) | 2022-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220343292.9U Active CN217088200U (en) | 2022-02-19 | 2022-02-19 | Improved resonance dominant frequency space radiation shielding and filtering circuit of electromagnetic heating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217088200U (en) |
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2022
- 2022-02-19 CN CN202220343292.9U patent/CN217088200U/en active Active
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