CN2472453Y - Electronic ballast for fluorescent tube - Google Patents
Electronic ballast for fluorescent tube Download PDFInfo
- Publication number
- CN2472453Y CN2472453Y CN 01212560 CN01212560U CN2472453Y CN 2472453 Y CN2472453 Y CN 2472453Y CN 01212560 CN01212560 CN 01212560 CN 01212560 U CN01212560 U CN 01212560U CN 2472453 Y CN2472453 Y CN 2472453Y
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- circuit
- resistance
- capacitor
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Abstract
The utility model discloses an electronic ballast for fluorescent lamps, which consists of an electromagnetic interference suppressing circuit, a primary harmonic wave absorbing circuit, a soft start trigger circuit, an error state self-protective circuit, a switching circuit and a resonant load circuit; wherein, the soft start trigger circuit and the error state self-protective circuit are combined into a thick film IC by adopting IC chips and discrete components. With the performance and reliability meeting the requirements of the national standard, the electronic ballast is low in cost and enjoys marked economic and social benefits.
Description
The utility model relates to a kind of electronic ballast for fluorescent lamps.
Existing electric ballast, ubiquity harmonic wave suppress not reach the national standard requirement, and current wave crest ratio is too high, and EMI filtering imperfection in addition, has adopted the magnet ring structure, bring components and parts screening trouble and job insecurity.
The purpose of this utility model is to overcome the weak point that above-mentioned prior art exists, optimize circuit structure, the thick film integrated circuit module that adopts integrated circuit (IC) chip and discrete component to combine produces high-performance, highly reliable electronic ballast for fluorescent lamps.
For achieving the above object; the technical solution adopted in the utility model is: this electric ballast absorbs circuit, switching circuit and load resonant circuit by electromagnetic interference suppression circuit, main harmonic and forms; it is characterized in that: absorb to be connected between circuit and the switching circuit at main harmonic and delay start triggering circuit and abnormality self-protection circuit; the version of slow start triggering circuit is resistance R
1A termination positive supply, the other end and electrochemical capacitor C
1Positive pole link to each other C
1Minus earth.From resistance R
1With capacitor C
1Continuous contact extract the power end that connects chip IC out.Resistance R
2A termination positive supply, the other end passes through resistance R
4Ground connection.From resistance R
2With resistance R
4The contact that links to each other is extracted connecting resistance R out
3, resistance R
3The other end and electrochemical capacitor C
2Positive pole link to each other C
2Minus earth.From resistance R
3With capacitor C
2The contact that links to each other is extracted connecting resistance R out
5, resistance R
5The other end receive triode T
1Base stage, T
1Grounded emitter, collector electrode passes through capacitor C
3Series resistance R
6Receive 2 pin of chip IC.From resistance R
6With capacitor C
3The contact that links to each other is extracted out and is connect 3 pin of chip IC, and passes through capacitor C
4Connect 4 pin of chip IC, I
C4 pin ground connection.Two outputs of chip IC pass through resistance R respectively
7, R
8Receive the base stage of two switching tubes in the switching circuit, 6 pin of chip IC are received an end of primary winding of mutual inductor in the switching circuit,
Abnormality self-protection circuit's version is, from resistance R
1With capacitor C
1The contact that links to each other is extracted the anode that meets controlled thyristor SCR, the minus earth of SCR, resistance R out
10With capacitor C
5Be connected between the control utmost point and ground of SCR resistance R after the parallel connection
11With electrochemical capacitor C
6After the parallel connection, again with resistance R
9, voltage-stabiliser tube DW series connection between the control utmost point and ground of SCR, resistance R
12With diode D
1Series connection is connected on electrochemical capacitor C
6In anode and the switching circuit between the end of instrument transformer secondary coil.
Advantage of the present utility model is: because in slow start triggering circuit and abnormality self-protection circuit; adopted integrated circuit (IC) chip and discrete component to be combined into integrated circuit modules; do not adopt the magnet ring structure; make startup stable, safe and reliable; thereby improved the performance and the reliability of product, and cost is low.
Fig. 1 is a circuit block diagram of the present utility model.
Fig. 2 is the physical circuit figure that delays start triggering circuit and abnormality self-protection circuit among Fig. 1.
Fig. 3 is the physical circuit figure that main harmonic absorbs a kind of embodiment of circuit among Fig. 1.
In conjunction with the accompanying drawings the utility model is described in further detail.
By Fig. 1, the utility model absorbs circuit 2, slow start triggering circuit 3, abnormality self-protection circuit 4, switching circuit 5 and load resonant circuit 6 by electromagnetic interference suppression circuit 1, main harmonic and forms.
Electromagnetic interference suppression circuit 1 has two effects: the one, eliminate external electromagnetic interference, and the 2nd, suppress the interference of electric ballast to electrical network, cooperate main harmonic to absorb circuit and help out.Main harmonic absorbs circuit 2 2～39 subharmonic content in the electric ballast input current is controlled in the scope of national standard permission.
By Fig. 2, the version of slow start triggering circuit 3 is resistance R
1A termination positive supply, the other end and electrochemical capacitor C
1Positive pole link to each other C
1Minus earth, from resistance R
1With capacitor C
1The contact that links to each other is extracted the power end that connects chip IC out, provides operating voltage to IC.Resistance R
2A termination positive supply, the other end passes through resistance R
4Ground connection.From resistance R
2With resistance R
4The contact that links to each other is extracted connecting resistance R out
3, resistance R
3The other end and electrochemical capacitor C
2Positive pole link to each other C
2Minus earth.From resistance R
3With capacitor C
2The contact that links to each other is extracted connecting resistance R out
5, resistance R
5The other end receive triode T
1Base stage, T
1Grounded emitter, collector electrode passes through capacitor C
3Series resistance R
6Receive 2 pin of chip IC.From resistance R
6With capacitor C
3The contact that links to each other is extracted out and is connect 3 pin of chip IC, and passes through capacitor C
4Connect 4 pin of chip IC, I
C4 pin ground connection.Resistance R
6, capacitor C
4Output pulse frequency during the work of decision chip IC; Two outputs of chip IC pass through resistance R respectively
7, R
8Receive the base stage of two switching tubes in the switching circuit 5,6 pin of chip IC are received an end of primary winding of mutual inductor in the switching circuit 5,
By Fig. 2, abnormality self-protection circuit 4 version is, from resistance R
1With capacitor C
1The contact that links to each other is extracted the anode that meets controlled thyristor SCR, the minus earth of SCR, resistance R out
10With capacitor C
5Be connected between the control utmost point and ground of SCR resistance R after the parallel connection
11With capacitor C
6After the parallel connection, again with resistance R
9, be connected between the control utmost point and ground of SCR resistance R after the voltage-stabiliser tube DW series connection
12With diode D
1Series connection is connected on electrochemical capacitor C
6In anode and the switching circuit between the end of instrument transformer secondary coil, by taking out through diode D from instrument transformer
1With resistance R
12, to capacitor C
6Charging offers voltage-stabiliser tube DW voltage.
In the utility model, main harmonic absorbs circuit 2 except can adopting existing general absorption circuit, also can adopt circuit as shown in Figure 3, and its version is diode D
3With capacitor C
10Be in parallel, be serially connected in the R in electromagnetic interference suppression circuit 1 malleation output and the slow start triggering circuit 3
1Between the input, diode D
4With capacitor C
11Be in parallel, be serially connected between the earth terminal of electromagnetic interference suppression circuit 1 negative pressure output and slow start triggering circuit 3 capacitor C
8, C
9Be in series, be connected on diode D
3Positive pole and diode D
4Negative pole between, resistance R
13With electrochemical capacitor C
12Be in parallel, be connected on diode D
3Negative pole and diode D
4Positive pole between, calm C
8, C
9Continuous contact extract out and connect load resonant circuit 6.
Slow start triggering circuit 3 and abnormality self-protection circuit 4 all can adopt the thick film integrated circuit module, and it is disposable to have improved production technology.
Implementation process of the present utility model is as follows: as shown in Figure 1; after connecting the 220V power supply; absorb direct voltage about circuit 2 output 300V through electromagnetic interference suppression circuit 1, main harmonic, give two switching tube pulse triggering signals in the switching circuit 5 by slow start triggering circuit 3 and abnormality self-protection circuit 4.Simultaneously through time-delay, make fluorescent tube obtain enough voltage, light and activate, start to the 1-2 that just lighted in second at lamp, the high frequency frequency is about 40KHz, after 1～2 second, and the triode T in the slow start triggering circuit 3
1Work, capacitor C
3With capacitor C
4Parallel connection, switching frequency is by resistance R
6, capacitor C
3, C
4Decide, change the chip IC output pulse frequency, two switching tube alternate conduction work in the switching circuit 5 are stabilized in about 25KHz.
Do not start when overcurrent, short circuit, lamp open circuit, lamp appear in load, during abnormality such as fluorescent tube rectifying effect, the electric current in the current circuit surpasses more than several times of normal value, at this moment by being arranged on the sampling on the instrument transformer in the switching circuit 5, through diode D
1Rectification is to capacitor C
6Charging, voltage-stabiliser tube DW breakdown triggering SCR conducting, abnormality self-protection circuit's 5 work.Through resistance R
1, diode SCR is providing slow start triggering circuit 3, two switching tube operation DC voltage to cut off, at this moment, slow start triggering circuit 3 quits work, entire circuit is in the self-shield state.SCR safeguards that electric current is by resistance R
1Provide, treat that abnormality is got rid of after, energized, electric ballast is resumed work.
Claims (3)
1, a kind of electronic ballast for fluorescent lamps; absorbing circuit, switching circuit and load resonant circuit by electromagnetic interference suppression circuit, main harmonic forms; it is characterized in that: between main harmonic absorption circuit and switching circuit, be connected to slow start triggering circuit (3) and abnormality self-protection circuit (4)
The version of slow start triggering circuit (3) is resistance R
1, a termination positive supply, the other end and electrochemical capacitor C
1Anodal continuous, C
1Minus earth is from resistance R
1With capacitor C
1The contact that links to each other is extracted the power end that connects chip IC, resistance R out
2One termination positive supply, the other end passes through resistance R
4Ground connection is from resistance R
2With resistance R
4The contact that links to each other is extracted connecting resistance R out
3, resistance R
3The other end and electrochemical capacitor C
2Positive pole link to each other C
2Minus earth, from resistance R
3With capacitor C
2The contact that links to each other is extracted connecting resistance R out
5, resistance R
5The other end receive triode T
1Base stage, T
1Grounded emitter, collector electrode passes through capacitor C
3Series resistance R
6Receive 2 pin of chip IC, from resistance R
6With capacitor C
3The contact that links to each other is extracted out and is connect 3 pin of chip IC, and passes through capacitor C
4Connect 4 pin of chip IC, I
C4 pin ground connection, two outputs of chip IC pass through resistance R respectively
7, R
8Receive the base stage of two switching tubes in the switching circuit, 6 pin of chip IC are received an end of primary winding of mutual inductor in the switching circuit,
Abnormality self-protection circuit's version is, from resistance R
1With capacitor C
1The contact that links to each other is extracted the anode that meets controlled thyristor SCR, the minus earth of SCR, resistance R out
10With capacitor C
5Be connected between the control utmost point and ground of SCR resistance R after the parallel connection
11With electrochemical capacitor C
6After the parallel connection, again with resistance R
9, voltage-stabiliser tube DW series connection between the control utmost point and ground of SCR, resistance R
12With diode D
1Series connection is connected on electrochemical capacitor C
6In anode and the switching circuit between the end of instrument transformer secondary coil.
2, electric ballast according to claim 1 is characterized in that: the version that main harmonic absorbs circuit 2 is diode D
3With capacitor C
10Be in parallel, be serially connected in the R in electromagnetic interference suppression circuit (1) malleation output and the slow start triggering circuit (3)
1Between the input, diode D
4With capacitor C
11Be in parallel, be serially connected between the earth terminal of electromagnetic interference suppression circuit (1) negative pressure output and slow start triggering circuit (3) capacitor C
8, C
9Be in series, be connected on diode D
3Positive pole and diode D
4Negative pole between, resistance R
13With electrochemical capacitor C
12Be in parallel, be connected on diode D
3Negative pole and diode D
4Positive pole between, calm C
8, C
9Continuous contact extract out and connect load resonant circuit (6).
3, electric ballast according to claim 1 and 2 is characterized in that: slow start triggering circuit (3) and abnormality self-protection circuit (4) adopt integrated circuit die I C and thick film element to be combined into the thick film integrated circuit module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01212560 CN2472453Y (en) | 2001-02-23 | 2001-02-23 | Electronic ballast for fluorescent tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01212560 CN2472453Y (en) | 2001-02-23 | 2001-02-23 | Electronic ballast for fluorescent tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2472453Y true CN2472453Y (en) | 2002-01-16 |
Family
ID=33631721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01212560 Expired - Fee Related CN2472453Y (en) | 2001-02-23 | 2001-02-23 | Electronic ballast for fluorescent tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2472453Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101577495B (en) * | 2008-05-07 | 2011-06-15 | 群康科技(深圳)有限公司 | Current converting circuit |
| CN101555999B (en) * | 2002-04-26 | 2013-06-19 | 通达商业集团国际公司 | Inductively powered lamp assembly |
-
2001
- 2001-02-23 CN CN 01212560 patent/CN2472453Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101555999B (en) * | 2002-04-26 | 2013-06-19 | 通达商业集团国际公司 | Inductively powered lamp assembly |
| CN101577495B (en) * | 2008-05-07 | 2011-06-15 | 群康科技(深圳)有限公司 | Current converting circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |