CN221127133U - Anti-electromagnetic interference circuit - Google Patents
Anti-electromagnetic interference circuit Download PDFInfo
- Publication number
- CN221127133U CN221127133U CN202322423150.0U CN202322423150U CN221127133U CN 221127133 U CN221127133 U CN 221127133U CN 202322423150 U CN202322423150 U CN 202322423150U CN 221127133 U CN221127133 U CN 221127133U
- Authority
- CN
- China
- Prior art keywords
- electrically connected
- diode
- transformer
- circuit
- module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 61
- 229910052724 xenon Inorganic materials 0.000 claims description 46
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims description 46
- 230000005669 field effect Effects 0.000 claims description 4
- 229910044991 metal oxide Inorganic materials 0.000 claims description 4
- 150000004706 metal oxides Chemical class 0.000 claims description 4
- 239000004065 semiconductor Substances 0.000 claims description 4
- 230000005611 electricity Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005286 illumination Methods 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
The utility model discloses an anti-electromagnetic interference circuit which comprises an inversion module, a rectification module and a transformer. The output end of the inversion module is electrically connected with the primary side of the transformer, the secondary side of the transformer is electrically connected with the input end of the rectification module, and the inversion module is also electrically connected with the grounding end. The anti-electromagnetic interference circuit also comprises a safety capacitor. The first end of the safety capacitor is electrically connected with the primary side of the transformer, and the second end of the safety capacitor is electrically connected with the secondary side of the transformer and is used for conveying electromagnetic interference generated by the secondary side of the transformer to the grounding end. Above-mentioned technical scheme passes through the primary side of safety rule electric capacity connection transformer and the secondary side of transformer, and then the electromagnetic interference who produces of secondary side of transformer can reach the earthing terminal of being connected with contravariant module electricity through the primary side of safety rule electric capacity and transformer, derives electromagnetic interference through the earthing terminal, has avoided electromagnetic interference's influence.
Description
Technical Field
The utility model relates to the field of xenon lamps, in particular to an anti-electromagnetic interference circuit.
Background
Xenon lamps are electric light sources which emit light by utilizing xenon discharge, and the light emission is that inert gas xenon is ionized to emit light, and the spectrum and the continuity of the xenon lamps are that the light color of the xenon lamps is close to that of sunlight, so that the xenon lamps are widely used in occasions such as high-power illumination, solar simulated light source equipment, medical operation illumination lamps, large-screen high-definition film projection and the like. In the prior art, a xenon lamp is connected to the secondary side of a transformer, and electromagnetic interference generated by the secondary side of the transformer easily affects the normal operation of the whole circuit.
Disclosure of utility model
The utility model provides an anti-electromagnetic interference circuit, which is used for reducing the influence of electromagnetic interference on the circuit.
In a first aspect, an embodiment of the present utility model provides an anti-electromagnetic interference circuit, including an inverter module, a rectifier module, and a transformer;
The output end of the inversion module is electrically connected with the primary side of the transformer, and the secondary side of the transformer is electrically connected with the input end of the rectification module; the inversion module is also electrically connected with the grounding end;
the anti-electromagnetic interference circuit also comprises an ampere-scale capacitor;
the first end of the safety capacitor is electrically connected with the primary side of the transformer, and the second end of the safety capacitor is electrically connected with the secondary side of the transformer and is used for conveying electromagnetic interference generated by the secondary side of the transformer to the grounding end.
Further, the capacitance value of the safety capacitor is C, wherein C is smaller than 1nF.
Further, the anti-electromagnetic interference circuit further comprises a xenon lamp module; the xenon lamp module comprises a xenon lamp and a magnetic ring, and the magnetic ring is arranged on a connecting line of the xenon lamp and the rectifying module.
Further, the magnetic ring comprises a first magnetic ring and a second magnetic ring; the first magnetic ring is located at the first input end of the xenon lamp, and the second magnetic ring is located at the second input end of the xenon lamp.
Further, the inversion module comprises an inversion circuit and a resonance circuit; the input end of the inverter circuit is electrically connected with the direct current power supply end, the output end of the inverter circuit is electrically connected with the input end of the resonant circuit, and the control end of the inverter circuit is electrically connected with the square wave signal input end; the output end of the resonant circuit is electrically connected with the primary side of the transformer; the primary side of the transformer is electrically connected with the grounding end.
Further, the inverter circuit includes a first transistor and a second transistor; the resonant circuit comprises a resonant capacitor and a resonant inductor;
The drain electrode of the first transistor is electrically connected with the direct current power supply end, the source electrode of the first transistor is electrically connected with the drain electrode of the second transistor, and the source electrode of the second transistor is electrically connected with the primary side of the transformer and the grounding end respectively;
the square wave signal input end comprises a first square wave signal input end and a second square wave signal input end, the grid electrode of the first transistor is electrically connected with the first square wave signal input end, the grid electrode of the second transistor is electrically connected with the second square wave signal input end, and the waveforms of the square wave signals output by the first square wave signal input end and the second square wave signal input end are different;
The first polar plate of the resonance capacitor is electrically connected with the source electrode of the first transistor and the drain electrode of the second transistor respectively, the second polar plate of the resonance capacitor is electrically connected with the first end of the resonance inductor, and the second end of the resonance inductor is electrically connected with the primary side of the transformer.
Further, the first transistor and the second transistor are both N-channel metal oxide semiconductor field effect transistors.
Further, the inversion module further comprises a filter circuit, and the filter circuit is arranged between the input end of the inversion circuit and the direct-current power supply end;
The filter circuit comprises a filter capacitor, wherein a first polar plate of the filter capacitor is respectively and electrically connected with the direct-current power supply end and the drain electrode of the first transistor, and a second polar plate of the filter capacitor is respectively and electrically connected with the source electrode of the second transistor and the grounding end.
Further, the rectifying module comprises a full-bridge rectifying circuit, the input end of the full-bridge rectifying circuit is electrically connected with the secondary side of the transformer, and the output end of the full-bridge rectifying circuit is electrically connected with the input end of the xenon lamp module.
Further, the full-bridge rectifier circuit comprises a first diode, a second diode, a third diode and a fourth diode;
The first diode and the second diode are connected in series to form a first diode module, the third diode and the fourth diode are connected in series to form a second diode module, and the first diode module and the second diode module are connected in parallel; the secondary side of the voltage divider is respectively connected with the first diode and the second transistor, and between the third diode and the fourth diode, the second end of the second diode and the second end of the fourth diode are both connected with the first input end of the xenon lamp module, and the first end of the first diode and the first end of the third diode are both connected with the second input end of the xenon lamp module.
The anti-electromagnetic interference circuit comprises an inversion module, a rectification module and a transformer. The output end of the inversion module is electrically connected with the primary side of the transformer, the secondary side of the transformer is electrically connected with the input end of the rectification module, and the inversion module is also electrically connected with the grounding end. The anti-electromagnetic interference circuit also comprises a safety capacitor. The first end of the safety capacitor is electrically connected with the primary side of the transformer, and the second end of the safety capacitor is electrically connected with the secondary side of the transformer and is used for conveying electromagnetic interference generated by the secondary side of the transformer to the grounding end. So connect the primary side of transformer and the secondary side of transformer through safety rule electric capacity, and then the electromagnetic interference who produces of secondary side of transformer can reach the earthing terminal of being connected with contravariant module electricity through safety rule electric capacity and the primary side of transformer, derive electromagnetic interference through the earthing terminal, avoided electromagnetic interference's influence.
Drawings
FIG. 1 is a schematic diagram of an anti-electromagnetic interference circuit according to an embodiment of the present utility model;
Fig. 2 is a specific circuit diagram of an anti-electromagnetic interference circuit according to an embodiment of the present utility model.
Detailed Description
In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be fully described below by way of specific embodiments with reference to the accompanying drawings in the examples of the present utility model. It is apparent that the described embodiments are some, but not all, embodiments of the present utility model, and that all other embodiments, which a person of ordinary skill in the art would obtain without making inventive efforts, are within the scope of this utility model.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a schematic block diagram of an anti-electromagnetic interference circuit according to an embodiment of the present utility model, where, as shown in fig. 1, the anti-electromagnetic interference circuit includes an inverter module 10, a rectifier module 20 and a transformer 30, an output end of the inverter module 10 is electrically connected to a primary side of the transformer 30, a secondary side of the transformer 30 is electrically connected to an input end of the rectifier module 20, and the inverter module 10 is further electrically connected to a ground end GND. The anti-electromagnetic interference circuit further comprises a safety capacitor 40, wherein a first end of the safety capacitor 40 is electrically connected with a primary side of the transformer 30, and a second end of the safety capacitor is electrically connected with a secondary side of the transformer 30, and is used for conveying electromagnetic interference generated by the secondary side of the transformer 30 to a grounding end GND.
Specifically, as shown in fig. 1, the inverter module 10 is configured to invert a dc power source into an ac power source, an output end of the inverter module 10 is electrically connected to a primary side of the transformer 30, and then the ac power source is transmitted to the primary side of the transformer 30, the transformer 30 changes an ac voltage of the ac power source according to an electromagnetic induction principle, and the transformed ac power source is output through a secondary side of the transformer 30. The primary side of the transformer 30 is understood to be the input side of the transformer 30, and the secondary side of the transformer 30 is understood to be the output side of the transformer 30, that is, for a step-up transformer, the primary side is the low-voltage side of the step-up transformer, the secondary side is the high-voltage side of the step-up transformer, and for a step-down transformer, the primary side is the high-voltage side of the step-down transformer, and the secondary side is the low-voltage side of the step-down transformer. The secondary side of the transformer 30 is electrically connected with the rectifying module 20, and the transformed ac power is converted into dc by the rectifying module 20 and then is transmitted to the electric device, so that the electric device is used to start working. In addition, the inverter module 10 is further provided with a grounding end GND, and the grounding end GND is used for bringing static electricity into the ground for release when electric leakage occurs to each electric appliance in the inverter module 10, so as to ensure equipment and personal safety.
In the prior art, the primary side of the transformer 30 and the secondary side of the transformer 30 are in a floating state, that is, there is no connection relationship between the primary side and the secondary side of the transformer 30, and electromagnetic interference generated by the secondary side of the transformer 30 cannot be timely led out, so that normal operation of the whole circuit can be affected.
Therefore, in the embodiment of the present utility model, the safety capacitor 40 is disposed between the primary side of the transformer 30 and the secondary side of the transformer 30, where the safety capacitor 40 refers to a safety capacitor that will not cause electric shock and will not endanger personal safety after the capacitor fails, for example, the safety capacitor 40 may be a Y capacitor, and the first end of the safety capacitor 40 is connected to the primary side of the transformer 30, and the second end of the safety capacitor 40 is connected to the secondary side of the transformer 30, that is, the secondary side of the transformer 30 is connected to the primary side of the transformer 30 through the safety capacitor 40, so that electromagnetic interference generated by the secondary side of the transformer 30 may be transmitted to the ground terminal GND electrically connected to the inverter module 10 through the safety capacitor 40 and the primary side of the transformer 30, and the electromagnetic interference is guided to the ground through the ground terminal GND, thereby avoiding the influence of the electromagnetic interference.
In summary, in the embodiment of the utility model, the first end of the safety capacitor is electrically connected with the primary side of the transformer, and the second end of the safety capacitor is electrically connected with the secondary side of the transformer, so that the primary side of the transformer and the secondary side of the transformer are connected through the safety capacitor, and electromagnetic interference generated by the secondary side of the transformer can reach the grounding end electrically connected with the inversion module through the safety capacitor and the primary side of the transformer, and the electromagnetic interference is led out through the grounding end, so that the influence of the electromagnetic interference is avoided.
Optionally, the capacitance value of the safety capacitor 40 is C, where C < 1nF. Specifically, the safety capacitor 40 has the function of isolating direct current from alternating current in a circuit, when the capacitance value C of the safety capacitor 40 is smaller, the frequency of an alternating current power supply capable of passing through the safety capacitor is larger, if the capacitance value C of the safety capacitor 40 is too large, the function of reducing electromagnetic interference cannot be achieved, that is, in order to ensure that the safety capacitor 40 can transmit high-frequency electromagnetic interference to a grounding end, the function of reducing electromagnetic interference is achieved, the capacitance value C of the safety capacitor 40 needs to be set small enough, for example, the safety capacitor 40 can be set at a pF level, that is, the capacitance value C of the safety capacitor 40 is satisfied, and C is smaller than 1nF.
Optionally, with continued reference to fig. 1 based on the above embodiment, the anti-electromagnetic interference circuit further includes a xenon lamp module 50. The xenon lamp module 50 includes a xenon lamp 510 and a magnetic ring 520, and the magnetic ring 520 is disposed on a connection path of the xenon lamp 510 and the rectifying module 20.
In particular, in the prior art, when dealing with the electromagnetic interference problem, the problem is often focused on the power supply system, that is, the electromagnetic interference problem is solved by improving the power supply system, and other electromagnetic interference is easily ignored. The present utility model considers that the light emitting mode of the xenon lamp 510 is arc discharge, and a large amount of electromagnetic interference is generated during operation, which also affects the circuit. Therefore, in the embodiment of the utility model, the magnetic ring 520 is arranged on the connecting line between the input end of the xenon lamp 510 and the output end of the rectifying module 20, and the magnetic ring 520 is sleeved on the line of the input end of the xenon lamp 510, so that electromagnetic interference can be effectively inhibited, and the electromagnetic interference of the whole circuit can be greatly reduced.
In one embodiment, the magnetic ring 520 includes a first magnetic ring 521 and a second magnetic ring 522, the first magnetic ring 521 being positioned at a first input of the xenon lamp 510, and the second magnetic ring 522 being positioned at a second input of the xenon lamp 510. Preferably, the magnetic rings 520 are disposed at both input ends of the xenon lamp 510, so as to further enhance the electromagnetic interference suppression effect.
Optionally, fig. 2 is a specific circuit diagram of an anti-electromagnetic interference circuit provided in the embodiment of the present utility model, referring to fig. 1 and fig. 2, the inverter module 10 includes an inverter circuit 110 and a resonant circuit 120, an input end of the inverter circuit 110 is electrically connected to a dc power supply end HV, an output end of the inverter circuit 110 is electrically connected to an input end of the resonant circuit 120, a control end of the inverter circuit 110 is electrically connected to a square wave signal input end V, an output end of the resonant circuit 120 is electrically connected to a primary side of the transformer 30, and a primary side of the transformer 30 is electrically connected to a ground end GND.
Specifically, the inverter module 10 includes an inverter circuit 110 and a resonance circuit 120. The control end of the inverter circuit 110 is electrically connected with the square wave signal input end V, a square wave signal (switch control signal) is provided for the inverter circuit 110 through the square wave signal input end V, the input end of the inverter circuit 110 is electrically connected with the dc power end HV, and then the dc power transmitted by the dc power end HV is inverted into an ac power under the action of the square wave signal, the output end of the inverter circuit 110 is electrically connected with the input end of the resonant circuit 120, the output end of the resonant circuit 120 is electrically connected with the primary side of the transformer 30, the resonant circuit 120 has the function of selective conduction, that is, an ac signal with the same resonant frequency as the resonant circuit 120 can pass through the resonant circuit 120, and then the ac power output by the inverter circuit 110 is input into the primary side of the transformer 30 after being screened by the resonant circuit 120. In addition, the primary side of the transformer 30 and the inverter circuit 110 are electrically connected to the ground GND, so as to ensure the safety of equipment and personnel.
Further, with continued reference to fig. 2, the inverter circuit 110 includes a first transistor Q1 and a second transistor Q2, and the resonant circuit 120 includes a resonant capacitor C1 and a resonant inductance L. The drain of the first transistor Q1 is electrically connected to the dc power source HV, the source of the first transistor Q1 is electrically connected to the drain of the second transistor Q2, and the source of the second transistor Q2 is electrically connected to the primary side of the transformer 30 and the ground GND, respectively. The square wave signal input end V comprises a first square wave signal input end V1 and a second square wave signal input end V2, a grid electrode of the first transistor Q1 is electrically connected with the first square wave signal input end V1, a grid electrode of the second transistor Q2 is electrically connected with the second square wave signal input end V2, and waveforms of square wave signals output by the first square wave signal input end V1 and the second square wave signal input end V2 are different. The first polar plate of the resonance capacitor C1 is electrically connected with the source electrode of the first transistor Q1 and the drain electrode of the second transistor Q2, respectively, the second polar plate of the resonance capacitor C1 is electrically connected with the first end of the resonance inductor L, and the second end of the resonance inductor L is electrically connected with the primary side of the transformer 30.
Specifically, the inverter circuit 110 includes a first transistor Q1 and a second transistor Q2, where the gate of the first transistor Q1 and the gate of the second transistor Q2 are electrically connected to the first square wave signal input terminal V1 and the second square wave signal input terminal output V2, respectively, and waveforms of the square wave signals of the first square wave signal input terminal V1 and the second square wave signal input terminal output V2 are different, that is, switch control signals of the first transistor Q1 and the second transistor Q2 are different, and further the first transistor Q1 and the second transistor Q2 are turned on in turn, so as to invert the dc power provided by the dc power terminal HV into the ac current. The resonant circuit 120 is connected between the first transistor Q1 and the second transistor Q2, that is, the first polar plate of the resonant capacitor C1 is electrically connected with the source of the first transistor Q1 and the drain of the second transistor Q2, the second polar plate of the resonant capacitor C1 is electrically connected with the first end of the resonant inductor L, the second end of the resonant inductor L is electrically connected with the primary side of the transformer 30, and the ac power source output by the first transistor Q1 and the second transistor Q2 screens out an ac signal conforming to the resonant frequency after passing through the series resonant capacitor C2 and the resonant inductor L, and inputs the ac signal to the primary side of the transformer 30.
Optionally, the first transistor Q1 and the second transistor Q2 are both N-channel mosfets. Specifically, the metal oxide semiconductor field effect transistor has low power consumption, high speed, small volume and high stability, and further the first transistor Q1 and the second transistor Q2 are N-channel metal oxide semiconductor field effect transistors, so that the control mode of the circuit can be ensured to be simple and convenient.
Optionally, the inverter module 10 further includes a filter circuit 130, where the filter circuit 130 is disposed between the input terminal of the inverter circuit 110 and the dc power source terminal HV. The filter circuit 130 includes a filter capacitor C2, a first plate of the filter capacitor C2 is electrically connected to the dc power supply terminal VT and the drain of the first transistor Q1, and a second plate of the filter capacitor C2 is electrically connected to the source of the second transistor Q2 and the ground terminal GND. Specifically, the filter circuit 130 is disposed between the input end of the inverter circuit 110 and the dc power end HV, so that the dc power input to the inverter circuit 110 from the dc power end VT is filtered by the filter circuit 130 to reduce the influence of the high-frequency signal.
Optionally, with continued reference to fig. 2 based on the above embodiment, the rectifying module 20 includes a full-bridge rectifying circuit 210, an input end of the full-bridge rectifying circuit 210 is electrically connected to the secondary side of the transformer 30, and an output end of the full-bridge rectifying circuit 210 is electrically connected to the input end of the xenon lamp module 50. Specifically, the input end of the full-bridge rectifier circuit 210 is electrically connected to the secondary side of the transformer 30, and the output end is electrically connected to the input end of the xenon lamp module 50, so that the ac power input by the secondary side of the transformer 30 is converted into the dc power by the full-bridge rectifier circuit 210, and the dc power is output to the xenon lamp module 50, so that the xenon lamp 510 starts to operate. In addition, the full-bridge rectifier circuit 210 also has an anti-reverse function.
Optionally, with continued reference to fig. 2, the full-bridge rectifier circuit 210 includes a first diode D1, a second diode D2, a third diode D3, and a fourth diode D4, where the first diode D1 and the second diode D2 are connected in series as a first diode module, the third diode D3 and the fourth diode D4 are connected in series as a second diode module, and the first diode module and the second diode module are connected in parallel. The secondary side of the transformer 30 is respectively connected between the first diode D1 and the second transistor D2, and between the third diode D3 and the fourth diode D4, the second end of the second diode D3 and the second end of the fourth diode D4 are both connected to the first input end of the xenon lamp module 50, and the first end of the first diode D1 and the first end of the third diode D3 are both connected to the second input end of the xenon lamp module 50.
Specifically, four identical rectifier diodes are connected into a bridge form, namely, a first diode D1 and a second diode D2 are connected in series to form a first diode module, a third diode D3 and a fourth diode D4 are connected in series to form a second diode module, and the first diode module and the second diode module are connected in parallel, so that an alternating current power supply is converted into a direct current power supply through the first diode D1, the second diode D2, the third diode D3 and the fourth diode D4 in the bridge form. Illustratively, during the positive half-cycle of the input ac power source, the second diode D2 and the third diode D3 are forward biased, i.e., the second diode D2 and the third diode D3 are conductive, and act as closed switches in the circuit, and the first diode D1 and the fourth diode D4 are reverse biased, i.e., the first diode D1 and the fourth diode D4 are non-conductive, corresponding to the switches being open. While during the negative half cycle of the input ac power source, the first diode D1 and the fourth diode D4 are forward biased, i.e., the first diode D1 and the fourth diode D4 are conductive, and the second diode D2 and the third diode D3 are reverse biased, i.e., the second diode D2 and the third diode D3 are non-conductive, so that the ac power source can be converted into a dc power source by the full-bridge rectifier circuit 210. The second end of the second diode D3 and the second end of the fourth diode D4 are both connected to the first input end of the xenon lamp module 50, and the first end of the first diode D1 and the first end of the third diode D3 are both connected to the second input end of the xenon lamp module 50, so that the dc power output by the full-bridge rectifying circuit 210 is transmitted to the xenon lamp module 50, so that the xenon lamp module 50 works normally.
Note that the above is only a preferred embodiment of the present utility model and the technical principle applied. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements, combinations, and substitutions can be made by those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.
Claims (10)
1. An anti-electromagnetic interference circuit is characterized by comprising an inversion module, a rectification module and a transformer;
The output end of the inversion module is electrically connected with the primary side of the transformer, and the secondary side of the transformer is electrically connected with the input end of the rectification module; the inversion module is also electrically connected with the grounding end;
the anti-electromagnetic interference circuit also comprises an ampere-scale capacitor;
the first end of the safety capacitor is electrically connected with the primary side of the transformer, and the second end of the safety capacitor is electrically connected with the secondary side of the transformer and is used for conveying electromagnetic interference generated by the secondary side of the transformer to the grounding end.
2. The anti-electromagnetic interference circuit of claim 1, wherein the capacitance of the safety capacitor is C, wherein C < 1nF.
3. The anti-electromagnetic interference circuit of claim 1, further comprising a xenon lamp module; the xenon lamp module comprises a xenon lamp and a magnetic ring, and the magnetic ring is arranged on a connecting line of the xenon lamp and the rectifying module.
4. The anti-electromagnetic interference circuit of claim 3, wherein the magnetic loop comprises a first magnetic loop and a second magnetic loop; the first magnetic ring is located at the first input end of the xenon lamp, and the second magnetic ring is located at the second input end of the xenon lamp.
5. The anti-electromagnetic interference circuit of claim 1, wherein the inverter module comprises an inverter circuit and a resonant circuit;
The input end of the inverter circuit is electrically connected with the direct current power supply end, the output end of the inverter circuit is electrically connected with the input end of the resonant circuit, and the control end of the inverter circuit is electrically connected with the square wave signal input end;
The output end of the resonant circuit is electrically connected with the primary side of the transformer;
The primary side of the transformer is electrically connected with the grounding end.
6. The anti-electromagnetic interference circuit of claim 5, wherein the inverter circuit comprises a first transistor and a second transistor; the resonant circuit comprises a resonant capacitor and a resonant inductor;
The drain electrode of the first transistor is electrically connected with the direct current power supply end, the source electrode of the first transistor is electrically connected with the drain electrode of the second transistor, and the source electrode of the second transistor is electrically connected with the primary side of the transformer and the grounding end respectively;
the square wave signal input end comprises a first square wave signal input end and a second square wave signal input end, the grid electrode of the first transistor is electrically connected with the first square wave signal input end, the grid electrode of the second transistor is electrically connected with the second square wave signal input end, and the waveforms of the square wave signals output by the first square wave signal input end and the second square wave signal input end are different;
The first polar plate of the resonance capacitor is electrically connected with the source electrode of the first transistor and the drain electrode of the second transistor respectively, the second polar plate of the resonance capacitor is electrically connected with the first end of the resonance inductor, and the second end of the resonance inductor is electrically connected with the primary side of the transformer.
7. The anti-electromagnetic interference circuit of claim 6, wherein the first transistor and the second transistor are both N-channel metal oxide semiconductor field effect transistors.
8. The anti-electromagnetic interference circuit of claim 6, wherein the inverter module further comprises a filter circuit disposed between an input of the inverter circuit and a dc power source terminal;
The filter circuit comprises a filter capacitor, wherein a first polar plate of the filter capacitor is respectively and electrically connected with the direct-current power supply end and the drain electrode of the first transistor, and a second polar plate of the filter capacitor is respectively and electrically connected with the source electrode of the second transistor and the grounding end.
9. The anti-electromagnetic interference circuit of claim 3 wherein the rectifying module comprises a full-bridge rectifying circuit, an input of the full-bridge rectifying circuit being electrically connected to a secondary side of the transformer, an output of the full-bridge rectifying circuit being electrically connected to an input of the xenon lamp module.
10. The anti-electromagnetic interference circuit of claim 9, wherein,
The full-bridge rectifying circuit comprises a first diode, a second diode, a third diode and a fourth diode;
The first diode and the second diode are connected in series to form a first diode module, the third diode and the fourth diode are connected in series to form a second diode module, and the first diode module and the second diode module are connected in parallel; the secondary side of the transformer is respectively connected between the first diode and the second diode, and between the third diode and the fourth diode, the second end of the second diode and the second end of the fourth diode are both connected to the first input end of the xenon lamp module, and the first end of the first diode and the first end of the third diode are both connected to the second input end of the xenon lamp module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322423150.0U CN221127133U (en) | 2023-09-06 | 2023-09-06 | Anti-electromagnetic interference circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322423150.0U CN221127133U (en) | 2023-09-06 | 2023-09-06 | Anti-electromagnetic interference circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221127133U true CN221127133U (en) | 2024-06-11 |
Family
ID=91371004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322423150.0U Active CN221127133U (en) | 2023-09-06 | 2023-09-06 | Anti-electromagnetic interference circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221127133U (en) |
-
2023
- 2023-09-06 CN CN202322423150.0U patent/CN221127133U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20020011801A1 (en) | Power feedback power factor correction scheme for multiple lamp operation | |
| US9906169B1 (en) | DC-AC conversion circuit having a first double ended DC pulse stage and a second AC stage | |
| TW347642B (en) | Ballast system | |
| CN103493348A (en) | Lighting power circuit with peak current limiter for EMI filter | |
| Vilela et al. | An electronic ballast with high power factor and low voltage stress | |
| CN109842973A (en) | Electric power distribution | |
| CN101944857B (en) | Power adapter including power reducer | |
| CN202696960U (en) | Novel LED (light emitting diode) lamp driving power source | |
| CN102307424A (en) | High-power dimming electrodeless lamp | |
| US9642199B2 (en) | LED driver circuit and electronic device | |
| CN221127133U (en) | Anti-electromagnetic interference circuit | |
| CN210609810U (en) | LED emergency power supply circuit | |
| CN103256509B (en) | Sectional type LED dimming lamp without externally arranged dimmer and dimming method thereof | |
| US9825550B1 (en) | Bi-directional power converter for converting power between alternating current and direct current | |
| CN210351017U (en) | High-power high-voltage direct-current power supply for pulse power | |
| Bekoski et al. | LED driver with reduced redundant power processing and dimming for street lighting applications | |
| CN101447163A (en) | Power conversion circuit for plasma display panel | |
| CN203289704U (en) | Sectional type LED (Light-Emitting Diode) lamp capable of light modulation and free of external light modulator | |
| CN104377962A (en) | Direct-current and high-voltage power supply of flocking machine | |
| CN204231199U (en) | A kind of DC high-voltage power supply of flocking machine | |
| CN203340390U (en) | Power supply circuit of HID lamp | |
| JP2017085705A (en) | Drive circuit | |
| CN205544952U (en) | A variable -frequency power supply | |
| CN203872059U (en) | Dry type small-power high-frequency resonance voltage-multiplying power source for electric precipitation | |
| CN104638969A (en) | Half-bridge inverter, electronic ballast using half-bridge inverter, and lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |