CN216414632U - Projection lamp system for anechoic chamber or shielding chamber - Google Patents
Projection lamp system for anechoic chamber or shielding chamber Download PDFInfo
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- CN216414632U CN216414632U CN202122445796.XU CN202122445796U CN216414632U CN 216414632 U CN216414632 U CN 216414632U CN 202122445796 U CN202122445796 U CN 202122445796U CN 216414632 U CN216414632 U CN 216414632U
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Abstract
The utility model discloses a projection lamp system for anechoic chamber or shielding chamber, comprising: the LED lamp panel comprises an alternating current power supply, a reinforced differential mode filter circuit, a driving circuit and an LED lamp panel; the first end of the enhanced differential mode filter circuit is connected with the power supply, the second end of the enhanced differential mode filter circuit is connected with the first end of the driving circuit, and the second end of the driving circuit is connected with the LED lamp panel; the drive circuit includes: the circuit comprises a resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, a first inductor, a second inductor and a rectifier bridge; the utility model can reduce energy consumption, prolong the service life of the lighting equipment, and does not need to frequently replace the lighting equipment, thereby reducing the maintenance frequency of the lighting equipment and reducing potential safety hazard.
Description
Technical Field
The utility model relates to the technical field of lamps, in particular to a light projecting lamp system for an anechoic chamber or a shielding chamber.
Background
Halogen lamps are generally adopted as lighting equipment of a anechoic chamber or a shielding chamber, and when an electromagnetic compatibility test laboratory is used for radiation disturbance tests, national standard 5-grade or military standard-grade tests are used, so that the requirement that the noise of the anechoic chamber and the shielding chamber is very low is met, and the requirements of common halogen lamps on noise of soles are difficult to meet; and lamps and lanterns are installed at the top of darkroom, and the halogen lamp is powerful lamps and lanterns mostly, and it is fairly big to generate heat, and the energy consumption is big, and life is short, often needs to be changed to lead to maintenance frequency height, the potential safety hazard is big.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide a projection lamp system for an anechoic chamber or a shielding chamber, and aims to solve the technical problems that lighting equipment in the anechoic chamber or the shielding chamber in the prior art cannot meet the requirement of sole noise, and is high in maintenance frequency and high in potential safety hazard.
To achieve the above object, the present invention provides a projector system for an anechoic chamber or a shielded room, comprising: the LED lamp panel comprises an alternating current power supply, a reinforced differential mode filter circuit, a driving circuit and an LED lamp panel; the first end of the enhanced differential mode filter circuit is connected with the power supply, the second end of the enhanced differential mode filter circuit is connected with the first end of the driving circuit, and the second end of the driving circuit is connected with the LED lamp panel; the drive circuit includes: the circuit comprises a resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, a first inductor, a second inductor and a rectifier bridge; the first end of the resistor is electrically connected with a live wire end of the alternating current power supply through the enhanced differential mode filter circuit, and the second end of the resistor is electrically connected with a first pin of the first inductor and a first end of the first capacitor; the first capacitor and the second pin of the first inductor are electrically connected with the alternating current power supply through the zero line end of the enhanced differential mode filter circuit; a third pin of the first inductor is electrically connected with a first end of the second inductor and a first alternating current end of the rectifier bridge, and a fourth pin of the first inductor is electrically connected with a second end of the second inductor and a first end of the third capacitor; the second end of the third capacitor is electrically connected with the second alternating current end of the rectifier bridge; the positive end of the rectifier bridge is electrically connected with the second end of the fourth capacitor and the second pin of the second inductor, and the negative end of the rectifier bridge is electrically connected with the first end of the fourth capacitor and the first pin of the second inductor; the third pin of the second inductor is electrically connected with the fifth capacitor, the sixth capacitor, the seventh capacitor and the first end of the LED lamp panel, and the fourth pin of the second inductor is electrically connected with the fifth capacitor, the sixth capacitor, the seventh capacitor and the second end of the LED lamp panel.
Furthermore, the capacitances of the first capacitor, the second capacitor, the third capacitor, the fourth capacitor, the fifth capacitor, the sixth capacitor and the seventh capacitor are 0.68uF, 0.1uF, 4-14 uF, 0.1uF, 220uF, 104uF and 103uF, respectively.
Further, the first inductor is an UUF type inductor, and the inductance is greater than 200 mH; the second inductor is a common-mode amorphous inductor, and the inductance is larger than 300 mH.
Furthermore, the magnetic ring of the second inductor is an amorphous magnetic ring, the first inductor and the second inductor are coated with a magnetic field shielding film, and the first inductor and the second inductor are grounded.
Further, the magnetic field shielding film is an aluminum foil.
Furthermore, the LED lamp panel consists of 50-60 strings of LED lamp beads; the direct current voltage of the LED lamp bead is 160V-180V.
Further, the third capacitor is 4uF, the power of the LED lamp of the rectifier bridge is 30W, or the third capacitor is 8uF, the power of the LED lamp of the rectifier bridge is 50W, or the third capacitor is 14uF, and the power of the LED lamp of the rectifier bridge is 75W.
Furthermore, the enhanced differential mode filter circuit is a differential mode filter circuit containing an electromagnetic compatibility filter.
The utility model provides a projector lamp system for an anechoic chamber or a shielding chamber, which has the advantages that: the LED lamp can be converted into alternating current, so that the power supply has the characteristics of constant current and linearity, the basic requirements of LED lamp driving are perfectly combined with the low background noise of a darkroom, and even if the external voltage is as high as 250V or even 300V, the LED lamp cannot be burnt out due to overcurrent under the characteristic of constant current.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a block diagram schematically illustrating the construction of a projector system for anechoic or shielded rooms;
fig. 2 is a circuit diagram of the driving circuit.
In the drawings, each reference numeral denotes:
1. an alternating current power supply; 2. a reinforced differential mode filter circuit; 3. a drive circuit; 4. an LED lamp panel; r, resistance; c1, a first capacitance; c2, a second capacitor; c3, a third capacitance; c4, a fourth capacitance; c5, a fifth capacitance; c6, a sixth capacitor; c7, a seventh capacitance; l1, a first inductor; l2, a second inductor; D. a rectifier bridge.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a projector system for anechoic chamber or shielded room includes: the LED lamp comprises an alternating current power supply 1, a reinforced differential mode filter circuit 2, a drive circuit 3 and an LED lamp panel 4; the first end of the enhanced differential mode filter circuit 2 is connected with the power supply, the second end of the enhanced differential mode filter circuit is connected with the first end of the driving circuit 3, and the second end of the driving circuit 3 is connected with the LED lamp panel 4.
In the present embodiment, the drive circuit 3 includes: the circuit comprises a resistor R, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, a first inductor L1, a second inductor L2 and a rectifier bridge D; the first end of the resistor R is electrically connected with a live wire end L of the alternating current power supply 1 through the enhanced differential mode filter circuit 2, and the second end of the resistor R is electrically connected with a first pin a of the first inductor L1 and a first end of the first capacitor C1; the first capacitor C1 and the second pin b of the first inductor L1 are electrically connected with the zero line end N of the alternating current power supply 1 through the enhanced differential mode filter circuit 2; a third pin C of the first inductor L1 is electrically connected to the first end of the second inductor L2 and the first ac end of the rectifier bridge D, and a fourth pin D of the first inductor L1 is electrically connected to the second end of the second inductor L2 and the first end of the third capacitor C3; the second end of the third capacitor C3 is electrically connected with the second alternating current end of the rectifier bridge D; the positive terminal of the rectifier bridge D is electrically connected with the second terminal of the fourth capacitor C4 and the second pin b of the second inductor L2, and the negative terminal of the rectifier bridge D is electrically connected with the first terminal of the fourth capacitor C4 and the first pin a of the second inductor L2; a third pin C of the second inductor L2 is electrically connected to the fifth capacitor C5, the sixth capacitor C6, the seventh capacitor C7, and the first end of the LED lamp panel 4, and a fourth pin d of the second inductor L2 is electrically connected to the fifth capacitor C5, the sixth capacitor C6, the seventh capacitor C7, and the second end of the LED lamp panel 4.
In this embodiment, through using strenghthened type differential mode filter circuit 2, drive circuit 3, can the conversion alternating current, make the power have constant current and linear characteristic, thereby with the perfect combination of LED lamp drive basic requirement and the low end noise of darkroom, under the characteristic that has the constant current, even if external voltage is as high as 250V even 300V, the LED lamp can not overflow and burn out, because this is high internal resistance power, the internal resistance comes from the capacitive reactance, and does not generate heat, thereby reduced the energy consumption, increased life, need not frequent change, consequently reduced lighting apparatus's maintenance frequency, and reduced the potential safety hazard.
In one embodiment, the capacitances of the first capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C4, the fifth capacitor C5, the sixth capacitor C6 and the seventh capacitor C7 are 0.68uF, 0.1uF, 4-14 uF, 0.1uF, 220uF, 104uF and 103uF, respectively.
In the present embodiment, the withstand voltage of the third capacitor C3 is 400V, so that the ac power supply 1 can be stepped down and bridge-rectified.
In other embodiments, the third capacitor C3 may be 4uF, and the LED lamp power of the rectifier bridge D is 30W.
In other embodiments, the third capacitor C3 may also be 8uF, and the LED lamp power of the rectifier bridge D is 50W.
In other embodiments, the third capacitor C3 may also be 14uF, and the LED lamp power of the rectifier bridge D is 75W.
In one embodiment, the first inductor L1 is a UUF type inductor with inductance greater than 200 mH; the second inductor L2 is a common mode amorphous inductor with inductance greater than 300 mH.
In one embodiment, the LED lamp panel 4 is composed of 50-60 strings of LED lamp beads; the direct current voltage of the LED lamp bead is 160V-180V.
In this embodiment, the LED lamp panel 4 that sets up like this can reach the less efficiency of whole electric current for the volume of first inductance L1 and second inductance L2 is also difficult for saturating under less circumstances.
In one embodiment, the magnetic ring of the second inductor L2 is an amorphous magnetic ring, the first inductor L1 and the second inductor L2 are wrapped with a magnetic field shielding film, and the first inductor L1 and the second inductor L2 are grounded. In this embodiment, the magnetic shielding film is an aluminum foil.
In this embodiment, the amorphous magnetic ring is a magnetic ring made of VAC, and the amorphous magnetic ring is wound into a common mode inductor with an inductance value of 300mH, which is the second inductor L2 in this embodiment, so that the common mode inductor can satisfy an unsaturated working condition.
In this embodiment, the aluminum foil can better block the magnetic field. Because the formula rectification can generate electromagnetic oscillation with the frequency ranging from hundreds of hertz to thirty megahertz in a switching period, the oscillation interference is far lower than various civil limit values under the general condition, but the background noise of an EMC darkroom is not allowed, and the low-frequency radiation can be well suppressed by using the aluminum foil as a magnetic field shielding film.
In one embodiment, enhanced differential mode filter circuit 2 is a differential mode filter circuit including an electromagnetic compatibility filter.
The above description of the projector system for anechoic chamber or shielded room provided by the present invention is provided for persons skilled in the art, and the concepts of the embodiments of the present invention may be changed in the specific implementation manners and the application ranges.
Claims (8)
1. A projector system for use in an anechoic or screened room, comprising:
the LED lamp panel comprises an alternating current power supply, a reinforced differential mode filter circuit, a driving circuit and an LED lamp panel;
the first end of the enhanced differential mode filter circuit is connected with the power supply, the second end of the enhanced differential mode filter circuit is connected with the first end of the driving circuit, and the second end of the driving circuit is connected with the LED lamp panel;
the drive circuit includes: the circuit comprises a resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, a first inductor, a second inductor and a rectifier bridge;
the first end of the resistor is electrically connected with a live wire end of the alternating current power supply through the enhanced differential mode filter circuit, and the second end of the resistor is electrically connected with the first pin a of the first inductor and the first end of the first capacitor; the first capacitor and the second pin b of the first inductor are electrically connected with the alternating current power supply through the zero line end of the enhanced differential mode filter circuit; a third pin c of the first inductor is electrically connected with a first end of the second inductor and a first alternating current end of the rectifier bridge, and a fourth pin of the first inductor is electrically connected with a second end of the second inductor and a first end of the third capacitor; the second end of the third capacitor is electrically connected with the second alternating current end of the rectifier bridge; the positive end of the rectifier bridge is electrically connected with the second end of the fourth capacitor and the second pin b of the second inductor, and the negative end of the rectifier bridge is electrically connected with the first end of the fourth capacitor and the first pin a of the second inductor; a third pin c of the second inductor is electrically connected with the fifth capacitor, the sixth capacitor, the seventh capacitor and the first end of the LED lamp panel, and a fourth pin d of the second inductor is electrically connected with the fifth capacitor, the sixth capacitor, the seventh capacitor and the second end of the LED lamp panel.
2. The projector system as claimed in claim 1, wherein the first capacitor, the second capacitor, the third capacitor, the fourth capacitor, the fifth capacitor, the sixth capacitor and the seventh capacitor have a capacitance of 0.68uF, 0.1uF, 4 to 14uF, 0.1uF, 220uF, 104uF and 103uF, respectively.
3. The projector system for anechoic or screened rooms as claimed in claim 1, wherein the first inductor is UUF type inductor with inductance greater than 200 mH; the second inductor is a common-mode amorphous inductor, and the inductance is larger than 300 mH.
4. The projector system as claimed in claim 1, wherein the magnetic ring of the second inductor is an amorphous magnetic ring, the first inductor and the second inductor are covered with a magnetic shielding film, and the first inductor and the second inductor are grounded.
5. The projector system for anechoic or shielded room as defined in claim 4, wherein said magnetic field shielding film is aluminum foil.
6. The projector system for anechoic or shielded room as claimed in claim 1, wherein the LED lamp panel is composed of 50-60 strings of LED lamp beads; the direct current voltage of the LED lamp bead is 160V-180V.
7. The projector system for anechoic or screened rooms as claimed in claim 2,
the third capacitor is 4uF, the power of the LED lamp of the rectifier bridge is 30W, or,
the third capacitor is 8uF, the power of the LED lamp of the rectifier bridge is 50W, or,
the third capacitor is 14uF, and the power of the LED lamp of the rectifier bridge is 75W.
8. The projector system as claimed in claim 1, wherein the enhanced differential mode filter circuit is a differential mode filter circuit comprising an electromagnetic compatibility filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122445796.XU CN216414632U (en) | 2021-10-11 | 2021-10-11 | Projection lamp system for anechoic chamber or shielding chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122445796.XU CN216414632U (en) | 2021-10-11 | 2021-10-11 | Projection lamp system for anechoic chamber or shielding chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216414632U true CN216414632U (en) | 2022-04-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122445796.XU Active CN216414632U (en) | 2021-10-11 | 2021-10-11 | Projection lamp system for anechoic chamber or shielding chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216414632U (en) |
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2021
- 2021-10-11 CN CN202122445796.XU patent/CN216414632U/en active Active
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