CN111225466A - Electronic ballast, ultraviolet lamp and fluorescent lamp - Google Patents
Electronic ballast, ultraviolet lamp and fluorescent lamp Download PDFInfo
- Publication number
- CN111225466A CN111225466A CN202010182025.3A CN202010182025A CN111225466A CN 111225466 A CN111225466 A CN 111225466A CN 202010182025 A CN202010182025 A CN 202010182025A CN 111225466 A CN111225466 A CN 111225466A
- Authority
- CN
- China
- Prior art keywords
- terminal
- circuit
- power switch
- diode
- resistor
- 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.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/24—Circuit arrangements in which the lamp is fed by high frequency ac, or with separate oscillator frequency
Abstract
The invention relates to an electronic ballast, an ultraviolet lamp and a fluorescent lamp, which comprise a rectifying circuit, a filter circuit, a half-bridge switching circuit, a driving transformation circuit and a load circuit connected with the ultraviolet lamp or the fluorescent lamp. The rectifying circuit and the filter circuit are used for converting alternating current into direct current and filtering ripples. The non-closed magnetic circuit core and three groups of coils in the driving voltage transformation circuit drive a half-bridge switching circuit to generate high-frequency alternating voltage. The non-closed magnetic circuit magnetic core adopted by the technical scheme of the invention can be manufactured by adopting an automatic transformer winding machine, has very high production efficiency, and can better control the inductance value, thereby better controlling the self-excited oscillation frequency of the circuit, improving the consistency of products and greatly improving the production efficiency of the electronic ballast.
Description
Technical Field
The invention relates to the technical field of special ultraviolet disinfection, in particular to an electronic ballast, an ultraviolet lamp and a fluorescent lamp.
Background
The ultraviolet disinfection lamp is favored by people due to the obvious disinfection effect and low price. After the new pneumonia outbreak, the demand of ultraviolet disinfection lamps on the market is increased. Both ultraviolet disinfection lamps and conventional fluorescent lamps require the use of an electronic ballast to drive the light source.
In the ultraviolet disinfection lamp and the fluorescent lamp in the prior art, an electronic ballast of the ultraviolet disinfection lamp and the fluorescent lamp is basically in a triode half-bridge framework driven by a self-excitation magnetic ring, but a magnetic ring coil belongs to a closed magnetic circuit, and the consistency of the magnetic ring coil is very difficult to reach an ideal state, so that the reliability of the electronic ballast is low. If the magnetic ring coil with high quality is to be produced, the magnetic ring coil is required to be sorted one by one, and the magnetic ring coil is required to be manually wound to produce, so that the automatic production of a machine cannot be realized, and the production efficiency is low.
Disclosure of Invention
In view of the above, the present invention is directed to an electronic ballast, an ultraviolet lamp and a fluorescent lamp, so as to overcome the problem of low reliability and production efficiency of the conventional electronic ballast.
In order to achieve the purpose, the invention adopts the following technical scheme:
an electronic ballast comprising: the circuit comprises a rectifying circuit, a filter circuit, a half-bridge switching circuit, a driving transformation circuit and a load circuit;
the driving transformation circuit comprises a non-closed magnetic circuit magnetic core and three groups of coils wound on the non-closed magnetic circuit magnetic core, namely a first coil, a second coil and a third coil; wherein the first coil and the third coil are in phase, and the first coil and the second coil are in opposite phase;
the half-bridge switching circuit includes a first power switch and a second power switch;
the input end of the rectifying circuit is input with a mains supply, and the output end of the rectifying circuit is connected with two ends of the filter circuit;
the first end of the first coil is connected with the first end of the first power switch, the second end of the first coil is connected with a circuit node, and the circuit node is respectively connected with the first end of the third coil, the second end of the first power switch and the third end of the second power switch; the first end of the second coil is connected with the first end of the second power switch; the second end of the third coil is connected with the first end of the load circuit;
the first end of the filter circuit is respectively connected with the line node, the third end of the first power switch, the first end of the second power switch and the second end of the load circuit;
and the second end of the filter circuit is respectively connected with the second end of the second power switch, the second end of the second coil and the third end of the load circuit.
Further, the electronic ballast further includes a current-limiting inductor, and the second end of the third coil is connected to the first end of the load circuit through the current-limiting inductor.
Further, the electronic ballast further comprises a soft start circuit;
the soft start circuit comprises a first resistor, a two-phase trigger diode and a first capacitor;
the first end of the first resistor is connected with the first end of the filter circuit, and the second end of the first resistor is respectively connected with the first end of the two-phase trigger diode DI and the first end of the first capacitor;
the second end of the first resistor is also connected with the line node, namely the first end of the filter circuit is connected with the line node through the first resistor;
the second end of the two-phase trigger diode DI is connected with the first end of the second power switch;
and the second end of the first capacitor is connected with the second end of the filter circuit.
Further, in the electronic ballast described above, the half-bridge circuit further includes a first diode, a second diode, a third diode, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, and a second capacitor;
the positive end of the first diode is connected with the second end of the first resistor, and the negative end of the first diode is connected with the line node, namely the first resistor is connected with the line node through the first diode;
the line node is also connected with the first end of the second resistor, the first end of the second capacitor and the positive terminal of the second diode respectively;
the second end of the second resistor and the second end of the second capacitor are connected with the first end of the filter circuit;
the second end of the first power switch is connected with the line node through the third resistor; the first end of the first power switch is connected with the negative electrode end of the second diode, and the first end of the first power switch is also connected with the first end of the first coil through the fourth resistor;
the first end of the second power switch is connected with the first end of the second coil through the fifth resistor, the first end of the second power switch is also connected with the negative electrode end of the third diode, and the positive electrode end of the third diode is connected with the second end of the filter circuit;
and the second end of the second power switch is connected with the second end of the filter circuit through a sixth resistor.
Further, in the electronic ballast, the first power switch is a triode or an MOS transistor;
the second power switch is a triode or an MOS tube.
Further, in the electronic ballast described above, the load circuit includes a first load interface, a second load interface, a third load interface, a fourth capacitor, a fifth capacitor, a sixth capacitor, a fourth diode, and a fifth diode;
the positive end of the fourth diode is used as the first end of the load circuit and is connected with the current-limiting inductor, and the positive end of the fourth diode is also connected with the second load interface;
a negative end of the fourth diode is connected with a first end of the fourth capacitor and the first load interface respectively, a second end of the fourth capacitor is connected with the third load interface and a negative end of the fifth diode respectively, and a positive end of the fifth diode is connected with the fourth load interface;
the fourth load interface is further connected with the first end of the fifth capacitor and the first end of the sixth capacitor respectively, the second end of the fifth capacitor is used as the second end of the load circuit and is connected with the first end of the filter circuit, and the second end of the sixth capacitor is used as the third end of the load circuit and is connected with the second end of the filter circuit.
Further, the electronic ballast described above further includes an EMC circuit, a surge circuit, a protection circuit, and a preheating circuit.
Further, in the electronic ballast described above, the non-closed magnetic core is an EE-type core.
The invention also provides an ultraviolet lamp, which comprises an ultraviolet lamp tube and the electronic ballast;
the electronic ballast is connected with the ultraviolet lamp tube.
The invention also provides a fluorescent lamp, which comprises a fluorescent lamp tube and the electronic ballast;
the electronic ballast is connected with the fluorescent lamp tube.
The invention relates to an electronic ballast, an ultraviolet lamp and a fluorescent lamp, which comprise a rectifying circuit, a filter circuit, a half-bridge switching circuit, a driving transformation circuit and a load circuit connected with a lamp tube. The rectifying circuit and the filter circuit are used for converting alternating current into direct current and filtering ripples. The non-closed magnetic circuit core and three groups of coils in the driving voltage transformation circuit drive a half-bridge switching circuit to generate high-frequency alternating voltage. The non-closed magnetic circuit magnetic core adopted by the technical scheme of the invention can be manufactured by adopting an automatic transformer winding machine, has very high production efficiency, and can well control the inductance value, thereby well controlling the self-oscillation frequency of the circuit, improving the consistency of products and greatly improving the production efficiency of the electronic ballast.
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 circuit diagram provided by an embodiment of the electronic ballast of the present invention;
fig. 2 is a circuit diagram provided by another embodiment of the electronic ballast of the present invention;
fig. 3 is a circuit diagram of an ultraviolet lamp according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Fig. 1 is a circuit diagram provided by an embodiment of the electronic ballast of the present invention. Referring to fig. 1, the electronic ballast of the present embodiment includes: the device comprises a rectifying circuit 1, a filter circuit 2, a half-bridge switching circuit 3, a driving transformation circuit 4 and a load circuit 5, wherein the load circuit is used for connecting lamp wicks of an ultraviolet lamp tube or a fluorescent lamp tube.
The driving transformer circuit 4 comprises a non-closed magnetic circuit core and three groups of coils wound on the non-closed magnetic circuit core, namely a first coil A1, a second coil A2 and a third coil A3; the first coil a1 and the third coil A3 have the same phase, the first coil a1 and the second coil a2 have opposite phases, and the non-closed magnetic circuit core is preferably an EE-type core, for example, an EE 10-type core. It should be noted that, this is only for illustration, and the non-closed magnetic core is not limited to be EE10 type only, and other types of non-closed magnetic cores are also within the protection scope of the present embodiment. The driving voltage transformation circuit 4 adopts a 4+4PIN mode, three coils are wound respectively, and a closed non-breathing design mode is adopted. The turn ratio of the first coil a1, the second coil a2 and the third coil A3 can be set according to practical situations, for example, set to 5: 5, etc., and the present embodiment is not limited.
The half-bridge switching circuit 3 includes a first power switch Q1 and a second power switch Q2. The first power switch Q1 and the second power switch Q2 may both use a transistor or a MOS transistor as a switching device.
An input end of the rectifying circuit 1 inputs a 220V alternating current commercial power supply, and an output end of the rectifying circuit 1 is connected with two ends of the filter circuit 2. The rectifying circuit 1 is used for converting a 220V alternating current power supply provided by a mains supply into a direct current power supply, and the filter circuit 2 is used for filtering ripples.
A first terminal of the first coil a1 of the half-bridge switch circuit 3 is connected to a first terminal of a first power switch Q1, a second terminal of the first coil a1 is connected to a line node a, and the line node a is connected to a first terminal of a third coil A3, a second terminal of the first power switch Q1 and a third terminal of a second power switch Q2, respectively; a first terminal of the second coil a2 is connected to a first terminal of a second power switch Q2; a second end of the third coil a3 is connected to a first end of the load circuit 5; a first end of the filter circuit 2 is connected with a line node a, a third end of the first power switch Q1, a first end of the second power switch Q2 and a second end of the load circuit 5 respectively; the second terminal of the filter circuit 2 is connected to the second terminal of the second power switch Q2, the second terminal of the second coil a2, and the third terminal of the load circuit 5, respectively.
Specifically, in the present embodiment, the first power switch Q1 and the second power switch Q2 are both NPN-type triodes with model 13003 as an example, and it should be noted that the first power switch Q1 and the second power switch Q2 are not limited herein.
The first terminals of the first power switch Q1 and the second power switch Q2 are bases, the second terminals of the first power switch Q1 and the second power switch Q2 are emitters, and the third terminals of the first power switch Q1 and the second power switch Q2 are collectors. The first terminal of the filter circuit 1 is preferably a positive terminal, and the second terminal of the filter circuit 1 is preferably a negative terminal. The current generated by the mains supply is rectified by the rectifying circuit 1, the ripple waves are filtered by the filter circuit 2, the current is discharged to the base electrode of the second power switch Q2, the second power switch Q2 is turned on, and the current flowing out of the first end of the filter circuit 2 returns to the second end of the filter circuit 2 after passing through the load circuit 5, the third coil A3 and the second power switch Q2.
Because the phases of the first coil a1 and the third coil A3 are the same, the phases of the first coil a1 and the second coil a2 are opposite, the current loop performs positive feedback, the second power switch Q2 immediately enters a deep saturation state along with the increase of the current, the current passing through the third coil A3 is gradually reduced, the current flowing through the first coil a1 is gradually increased, when the current flowing through the first coil a1 is increased to a certain degree, the first power switch Q1 is turned on, the current is reversed, and at this time, the current flowing out of the first end of the filter circuit 2 passes through the first power switch Q1, the third coil A3 and the load circuit 5 and then returns to the second end of the filter circuit 2.
Further, as the current in the first coil a1 increases further, the first power switch Q1 enters the deep saturation state immediately, and the second power switch Q2 exits the saturation state, the current reverses again, and the circuit is in the continuous inversion state.
The embodiment adopts the magnetic core with the non-closed magnetic circuit, can be manufactured by adopting the automatic winding machine of the transformer, has very high production efficiency, and can well control the inductance value, thereby well controlling the self-oscillation frequency of the circuit, improving the consistency of products and greatly improving the production efficiency of the electronic ballast.
Fig. 2 is a circuit diagram provided by another embodiment of the electronic ballast of the present invention. Referring to fig. 2, the electronic ballast of the present embodiment further includes a current-limiting inductor L, and the second terminal of the third coil a3 is connected to the first terminal of the load circuit 5 through the current-limiting inductor L. The current-limiting inductor L can realize the current-limiting function, so as to control the current passing through the load circuit and avoid damaging the lamp tube due to overlarge current.
Further, the electronic ballast described above further includes a soft-start circuit 6. The soft start circuit 6 includes a first resistor R1, a two-phase trigger diode DI, and a first capacitor C1. The first resistor R1 in this embodiment preferably includes two resistors R11 and R12, as shown in fig. 2.
A first terminal of the first resistor R1 is connected to a first terminal of the filter circuit 2, and a second terminal of the first resistor R1 is connected to a first terminal of the two-phase trigger diode DI and a first terminal of the first capacitor C1, respectively. The second terminal of the first resistor R1 is also connected to the line node a, i.e. the first terminal of the filter circuit 2 is connected to the line node a via a first resistor R1. A second terminal of the two-phase trigger diode DI is connected to a first terminal of the second power switch Q2, and a second terminal of the first capacitor C1 is connected to a second terminal of the filter circuit 2.
Specifically, the filtered current charges the first capacitor C1 through the first resistor R1, and when the voltage of the first capacitor C1 reaches the trigger voltage of the two-phase trigger diode DI, the two-phase trigger diode DI is turned on and then discharges to the base of the second power switch Q2. Furthermore, the device can be prevented from being burnt down due to sudden increase of current or voltage.
Further, in the electronic ballast as described above, the half-bridge circuit further includes a first diode D1, a second diode D2, a third diode D3, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a second capacitor C2.
As shown in fig. 2, the positive terminal of the first diode D1 is connected to the second terminal of the first resistor R1, and the negative terminal of the first diode D1 is connected to the line node a, i.e., the first resistor R1 is connected to the line node a through the first diode D1; the line node a is also respectively connected with a first end of a second resistor R2, a first end of a second capacitor C2 and the positive end of a second diode D2; a second end of the second resistor R2 and a second end of the second capacitor C2 are connected with a first end of the filter circuit 1; a second terminal of the first power switch Q1 is connected to the line node a through a third resistor R3; a first terminal of the first power switch Q1 is connected to the negative terminal of the second diode D2, and a first terminal of the first power switch Q1 is further connected to a first terminal of the first coil a1 through a fourth resistor R4; a first end of the second power switch Q2 is connected to the first end of the second coil a2 through a fifth resistor R5, the first end of the second power switch Q2 is further connected to a negative terminal of a third diode D3, and a positive terminal of the third diode D3 is connected to the second terminal of the filter circuit 2; a second terminal of the second power switch Q2 is connected to a second terminal of the filter circuit 2 through a sixth resistor R6.
Further, in the electronic ballast, the rectifying circuit 1 is preferably a rectifying bridge, and the filter circuit 2 is preferably an aluminum electrolytic capacitor C3, as shown in fig. 2.
Further, the load circuit 15 described above includes a first load interface B1, a second load interface B2, a third load interface B3, a fourth load interface B4, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a fourth diode D4, and a fifth diode D5.
As shown in fig. 2, in this embodiment, the positive terminal of the fourth diode D4 is used as the first terminal of the load circuit 15 and connected to the current-limiting inductor L, the positive terminal of the fourth diode D4 is further connected to the second load interface B2, the negative terminal of the fourth diode D4 is connected to the first terminal of the fourth capacitor C4 and the first load interface B1, the second terminal of the fourth capacitor C4 is connected to the third load interface B3 and the negative terminal of the fifth diode D5, and the positive terminal of the fifth diode D5 is connected to the fourth load interface B4. The fourth load interface B4 is further connected to the first terminal of the fifth capacitor C5 and the first terminal of the sixth capacitor C6, respectively, the second terminal of the fifth capacitor C5 is connected to the first terminal of the filter circuit 2 as the second terminal of the load circuit 5, and the second terminal of the sixth capacitor C6 is connected to the second terminal of the filter circuit 2 as the third terminal of the load circuit 5.
Specifically, when the lamp is connected as a load, and the second power switch Q2 is turned on, the current flows out from the first end of the filter circuit 2, and the specific route that the current passes through is as follows:
the first end of the filter circuit 2 → the fifth capacitor C5 → the fourth load interface B4 → the third load interface B3 → the fourth capacitor C4 → the first load interface B1 → the second load interface B2 → the current-limiting inductor L → the third coil a3 → the line node a → the second power switch Q2 → the sixth resistor R6 → the second end of the filter circuit 2.
When the first power switch Q1 is turned on, the current flows out from the first end of the filter circuit 2, and the specific route is as follows:
the first end of the filter circuit 2 → the first power switch Q1 → the line node a → the third coil A3 → the current-limiting inductor L → the second load interface B2 → the first load interface B1 → the fourth capacitor C4 → the third load interface B3 → the fourth load interface B4 → the sixth capacitor C6 → the second end of the filter circuit 2.
Further, the electronic ballast further comprises an EMC circuit, a surge circuit, a protection circuit and a preheating circuit. EMC circuit, surge circuit, protection circuit and preheating circuit are conventional structures in electronic ballasts, and those skilled in the art can refer to the prior art, and are not described herein.
Fig. 3 is a circuit diagram of an ultraviolet lamp according to an embodiment of the present invention. The ultraviolet lamp of the present embodiment includes an ultraviolet lamp tube 6 and an electronic ballast 7 described in the above embodiment, and the electronic ballast 7 is connected to the ultraviolet lamp tube 6.
The invention also provides a fluorescent lamp, which comprises a fluorescent lamp tube and the electronic ballast in the embodiment, wherein the electronic ballast is connected with the fluorescent lamp tube.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that the terms "first," "second," and the like in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present invention, the meaning of "a plurality" means at least two unless otherwise specified.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. An electronic ballast, comprising: the circuit comprises a rectifying circuit (1), a filter circuit (2), a half-bridge switching circuit (3), a driving transformation circuit (4) and a load circuit (5);
the driving transformer circuit (4) comprises a non-closed magnetic circuit magnetic core and three groups of coils wound on the non-closed magnetic circuit magnetic core, namely a first coil (A1), a second coil (A2) and a third coil (A3); wherein the first coil (A1) and the third coil (A3) are in phase, the first coil (A1) and the second coil (A2) are in phase opposition;
the half-bridge switching circuit (3) comprises a first power switch (Q1) and a second power switch (Q2);
the input end of the rectifying circuit (1) is input with a mains supply, and the output end of the rectifying circuit (1) is connected with two ends of the filter circuit (2);
a first terminal of the first coil (a1) is connected to a first terminal of the first power switch (Q1), a second terminal of the first coil (a1) is connected to a line node (a) which is connected to a first terminal of the third coil (A3), a second terminal of the first power switch (Q1) and a third terminal of the second power switch (Q2), respectively; a first end of the second coil (A2) is connected to a first end of the second power switch (Q2); a second end of the third coil (a3) is connected to a first end of the load circuit (5);
a first terminal of the filter circuit (2) is connected to the line node (a), the third terminal of the first power switch (Q1), the first terminal of the second power switch (Q2) and the second terminal of the load circuit (5), respectively;
a second terminal of the filter circuit (2) is connected to a second terminal of the second power switch (Q2), a second terminal of the second coil (a2), and a third terminal of the load circuit (5), respectively.
2. Electronic ballast according to claim 1, further comprising a current limiting inductor (L), the second terminal of the third coil (a3) being connected to the first terminal of the load circuit (5) via the current limiting inductor (L).
3. An electronic ballast as claimed in claim 1, further comprising a soft start circuit (6);
the soft start circuit (6) comprises a first resistor (R1), a two-phase trigger Diode (DI) and a first capacitor (C1);
a first end of the first resistor (R1) is connected with a first end of the filter circuit (2), and a second end of the first resistor (R1) is respectively connected with a first end of the two-phase trigger Diode (DI) and a first end of the first capacitor (C1);
the second end of the first resistor (R1) is also connected to the line node (a), i.e. the first end of the filter circuit (2) is connected to the line node (a) via the first resistor (R1);
a second terminal of the two-phase trigger Diode (DI) is connected to a first terminal of the second power switch (Q2);
the second end of the first capacitor (C1) is connected with the second end of the filter circuit (2).
4. The electronic ballast according to claim 3, wherein the half-bridge circuit further comprises a first diode (D1), a second diode (D2), a third diode (D3), a second resistor (R2), a third resistor (R3), a fourth resistor (R4), a fifth resistor (R5), a sixth resistor (R6), and a second capacitor (C2);
the positive terminal of the first diode (D1) is connected with the second terminal of the first resistor (R1), the negative terminal of the first diode (D1) is connected with the line node (a), namely, the first resistor (R1) is connected with the line node (a) through the first diode (D1);
the line node (a) is further connected to a first terminal of the second resistor (R2), a first terminal of the second capacitor (C2) and a positive terminal of the second diode (D2), respectively;
a second end of the second resistor (R2) and a second end of the second capacitor (C2) are connected with a first end of the filter circuit (1);
a second terminal of the first power switch (Q1) is connected to the line node (a) through the third resistor (R3); a first terminal of the first power switch (Q1) is connected to the negative terminal of the second diode (D2), and a first terminal of the first power switch (Q1) is further connected to a first terminal of the first coil (a1) through the fourth resistor (R4);
a first end of the second power switch (Q2) is connected to the first end of the second coil (a2) through the fifth resistor (R5), the first end of the second power switch (Q2) is further connected to a negative terminal of the third diode (D3), and a positive terminal of the third diode (D3) is connected to the second terminal of the filter circuit (2);
a second terminal of the second power switch (Q2) is connected to a second terminal of the filter circuit (2) through a sixth resistor (R6).
5. The electronic ballast according to claim 1, wherein the first power switch is a triode or a MOS transistor;
the second power switch is a triode or an MOS tube.
6. Electronic ballast according to claim 1, characterized in that the load circuit (15) comprises a first load interface (B1), a second load interface (B2), a third load interface (B3), a fourth load interface (B4), a fourth capacitor (C4), a fifth capacitor (C5), a sixth capacitor (C6), a fourth diode (D4) and a fifth diode (D5);
the positive end of the fourth diode (D4) is used as the first end of the load circuit (15) and is connected with the current-limiting inductor (L), and the positive end of the fourth diode (D4) is also connected with the second load interface (B2);
a negative terminal of the fourth diode (D4) is connected to the first terminal of the fourth capacitor (C4) and the first load interface (B1), respectively, a second terminal of the fourth capacitor (C4) is connected to the negative terminals of the third load interface (B3) and the fifth diode (D5), respectively, and a positive terminal of the fifth diode (D5) is connected to the fourth load interface (B4);
the fourth load interface (B4) is further connected to the first terminal of the fifth capacitor (C5) and the first terminal of the sixth capacitor (C6), respectively, the second terminal of the fifth capacitor (C5) is connected to the first terminal of the filter circuit (2) as the second terminal of the load circuit (5), and the second terminal of the sixth capacitor (C6) is connected to the second terminal of the filter circuit (2) as the third terminal of the load circuit (5).
7. The electronic ballast of claim 1, further comprising an EMC circuit, a surge circuit, a protection circuit and a preheat circuit.
8. The electronic ballast according to claim 1, wherein said non-closed magnetic circuit core is an EE-type core.
9. An ultraviolet radiation lamp comprising an ultraviolet radiation lamp tube and an electronic ballast according to any one of claims 1 to 8;
the electronic ballast is connected with the ultraviolet lamp tube.
10. A fluorescent lamp comprising a fluorescent tube and an electronic ballast according to any one of claims 1 to 8;
the electronic ballast is connected with the fluorescent lamp tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010182025.3A CN111225466A (en) | 2020-03-16 | 2020-03-16 | Electronic ballast, ultraviolet lamp and fluorescent lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010182025.3A CN111225466A (en) | 2020-03-16 | 2020-03-16 | Electronic ballast, ultraviolet lamp and fluorescent lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111225466A true CN111225466A (en) | 2020-06-02 |
Family
ID=70831743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010182025.3A Pending CN111225466A (en) | 2020-03-16 | 2020-03-16 | Electronic ballast, ultraviolet lamp and fluorescent lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111225466A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113368651A (en) * | 2021-06-30 | 2021-09-10 | 江苏保丽洁环境科技股份有限公司 | System for monitoring ultraviolet lamp and oil smoke purifier with system |
-
2020
- 2020-03-16 CN CN202010182025.3A patent/CN111225466A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113368651A (en) * | 2021-06-30 | 2021-09-10 | 江苏保丽洁环境科技股份有限公司 | System for monitoring ultraviolet lamp and oil smoke purifier with system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8035318B2 (en) | Apparatus and method enabling fully dimmable operation of a compact fluorescent lamp | |
| JP2003520407A (en) | Power feedback power factor correction scheme for multiple lamp operation. | |
| JP3187727B2 (en) | Ballast circuit for fluorescent lamp | |
| JP5048920B2 (en) | Current resonance type inverter circuit and power control means | |
| WO2013026267A1 (en) | Self-excited push-pull converter | |
| CN108770117B (en) | A kind of integrated LED drive power of compatible electronic transformer | |
| JPH11507176A (en) | Single switch ballast with power factor correction | |
| JP2008153198A (en) | Current driven toroid-free feedback type ballast | |
| EP2015617A2 (en) | Electronic ballasts without toroidal-magnetic-core and fluorescent lamps employing the same | |
| CN111225466A (en) | Electronic ballast, ultraviolet lamp and fluorescent lamp | |
| CN211792108U (en) | Electronic ballast, ultraviolet lamp and fluorescent lamp | |
| Brumatti et al. | Single stage self-oscillating HPF electronic ballast | |
| CN201114946Y (en) | Dual vertical tube electronic ballast | |
| CN100517934C (en) | Dimmable ballast with resistive input and low electromagnetic interference | |
| CN111934564B (en) | High-frequency alternating current power supply control circuit of electron tube power amplifier | |
| WO2009027727A1 (en) | Lighting controllers | |
| CN1674757B (en) | Electromagnetic inductive lamp circuit | |
| CN104754844B (en) | A kind of electronic ballast for fluoresent lamp | |
| CN108124341B (en) | LED driver and LED lighting device | |
| van Casteren et al. | Transition mode stacked buck converter for HID lamps | |
| US5977721A (en) | Controlled power-factor-corrected ballast | |
| CN2678308Y (en) | Electronic ballast | |
| CN2253559Y (en) | Self-excitation electronic ballast | |
| JP3009683U (en) | Stable discharge current control circuit for discharge lamp | |
| CN2381093Y (en) | Electronic ballast |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |