CN201349352Y - Electronic ballast - Google Patents
Electronic ballast Download PDFInfo
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- CN201349352Y CN201349352Y CNU2009200500581U CN200920050058U CN201349352Y CN 201349352 Y CN201349352 Y CN 201349352Y CN U2009200500581 U CNU2009200500581 U CN U2009200500581U CN 200920050058 U CN200920050058 U CN 200920050058U CN 201349352 Y CN201349352 Y CN 201349352Y
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Abstract
The utility model relates to the technical field of ballast, and particularly relates to an electronic ballast, which comprises a rectifying filter circuit, a DC/AC circuit, a power factor correcting circuit, a DC/AC reduction voltage circuit and an integrated control circuit. Since the power factor correcting circuit is added, compared with the prior electronic ballast, the utility model can improve the power factors; furthermore, the utility model further comprises the integrated control circuit; and the integrated control circuit controls the DC/AC reduction voltage circuit to output working voltage and current suitability for the lamp tube through detecting the information fed back by the output voltage and the output current DC/AC reduction voltage circuit, thereby avoiding the phenomena of the overpressure and overcurrent and the like, and improving the electricity-saving effect.
Description
Technical field:
The utility model relates to the ballast technical field, relates in particular to a kind of electric ballast.
Background technology:
Fluorescent tube such as high-pressure sodium lamp, Metal halogen lamp has the high characteristics of brightness, be particularly suitable for using as street lamp or shot-light, and since fluorescent tubes such as high-pressure sodium lamp, Metal halogen lamp when lighting, need alternating current moment of low pressure is risen to the alternating current of high pressure, so fluorescent tube such as high-pressure sodium lamp, Metal halogen lamp can't use separately, it must just can start and keep the stability and the continuity of light by ballast.Ballast has two kinds of electric ballast and Inductive ballasts usually, and electric ballast is more superior aspect energy-saving and cost-reducing, also will replace Inductive ballast.
At present, electric ballast generally includes current rectifying and wave filtering circuit, DC/AC (direct current is converted to alternating current) circuit, the output of current rectifying and wave filtering circuit is connected with the input of DC/AC circuit, after current rectifying and wave filtering circuit is converted to direct current with the low-voltage AC of importing, by the DC/AC circuit direct current is converted to High Level AC Voltage again, thereby the output AC electricity starts high-pressure sodium lamp, fluorescent tubes such as Metal halogen lamp and light after keep the state of bright lamp, but, this electric ballast mainly is made of discrete component, does not have power factor emendation function, disturbs harmonic content higher, power factor (PF) is lower, power consumption is bigger, and power savings is poor, and easily electrical network is produced interference or pollution.
The utility model content:
The purpose of this utility model is exactly the deficiency that exists at prior art and a kind of power factor (PF) height, electric ballast that power savings is good are provided.
To achieve these goals, the technical solution adopted in the utility model is:
It comprises current rectifying and wave filtering circuit, DC/AC circuit, circuit of power factor correction (claim not only pfc circuit), DC/DC reduction voltage circuit (but also claiming the BUCK circuit), integral control circuit, the output of described current rectifying and wave filtering circuit is connected with the input of circuit of power factor correction, the output of circuit of power factor correction is connected with the input of DC/DC reduction voltage circuit, the output of DC/DC reduction voltage circuit is connected with the input of DC/AC circuit, and the output of DC/AC circuit is connected with fluorescent tube; The output of described DC/DC reduction voltage circuit is connected with the input of integral control circuit, is used to feed back the output voltage and the output current information of DC/DC reduction voltage circuit; The output of described integral control circuit is connected with the input of DC/DC reduction voltage circuit and the input of DC/AC circuit respectively, is used to control DC/DC reduction voltage circuit and DC/AC circuit; The input of described integral control circuit is connected with fluorescent tube, is used to monitor the operating state of fluorescent tube.
Described a kind of electric ballast further comprises EMI (electromagneticinterference, electromagnetic interference) filter circuit, the input of EMI filter circuit is electrically connected with external input AC, and the output of EMI filter circuit is connected with the input of current rectifying and wave filtering circuit.
The described input AC electricity that is connected with EMI filter circuit input is 100V～270V.
The output of described circuit of power factor correction is connected with the low pressure voltage stabilizing circuit, is used to each circuit that working power is provided.
Be provided with the igniting output circuit between described integral control circuit and the DC/AC circuit, the input of igniting output circuit is connected with the output of integral control circuit and the output of DC/AC circuit respectively.
The utility model beneficial effect is:
A kind of electric ballast that the utility model provides comprises current rectifying and wave filtering circuit, DC/AC circuit, circuit of power factor correction, DC/DC reduction voltage circuit, integral control circuit, the output of described current rectifying and wave filtering circuit is connected with the input of circuit of power factor correction, the output of circuit of power factor correction is connected with the input of DC/DC reduction voltage circuit, the output of DC/DC reduction voltage circuit is connected with the input of DC/AC circuit, and the output of DC/AC circuit is connected with fluorescent tube; The output of described DC/DC reduction voltage circuit is connected with the input of integral control circuit, is used to feed back the output voltage and the output current information of DC/DC reduction voltage circuit; The output of described integral control circuit is connected with the input of DC/DC reduction voltage circuit and the input of DC/AC circuit respectively, is used to control DC/DC reduction voltage circuit and DC/AC circuit; The input of described integral control circuit is connected with fluorescent tube, is used to monitor the operating state of fluorescent tube.Owing to increased circuit of power factor correction, to compare with existing electric ballast, the utility model can improve power factor; And, the utility model also is provided with integral control circuit, this integral control circuit is exported operating voltage and the electric current that is fit to fluorescent tube by the output voltage of detection DC/DC reduction voltage circuit and the feedback information control DC/AC circuit of output current, the situations such as overvoltage, overcurrent that prevent take place, thereby improve power savings.
Description of drawings:
Fig. 1 is a block diagram of the present utility model
Embodiment:
Below in conjunction with accompanying drawing the utility model is further described, please refer to Fig. 1, the utility model comprises EMI filter circuit 1, current rectifying and wave filtering circuit 2, DC/AC circuit 5, circuit of power factor correction 3, DC/DC reduction voltage circuit 4, integral control circuit 6; The input of described EMI filter circuit 1 is electrically connected with external input AC, more particularly, the described input AC electricity that is connected with EMI filter circuit 1 input is 100V～270V, be that the utility model is applicable to alternating current 110V or 220V commonly used, so that the use of different size electrical network; The output of described EMI filter circuit 1 is connected with the input of current rectifying and wave filtering circuit 2, and EMI filter circuit 1 can be avoided the Harmonic Interference filtering signals such as electromagnetic wave of input AC electricity electric ballast electrical network is produced and disturb or pollution; The output of described current rectifying and wave filtering circuit 2 is connected with the input of circuit of power factor correction 3, the output of circuit of power factor correction 3 is connected with the input of DC/DC reduction voltage circuit 4, the output of DC/DC reduction voltage circuit 4 is connected with the input of DC/AC circuit 5, the output of DC/AC circuit 5 is connected with fluorescent tube 9, owing to increased circuit of power factor correction 3, compare with existing electric ballast, the utility model can improve power factor, reduce power consumption, power factor of the present utility model can reach more than 0.95.
The integral control circuit 6 of present embodiment mainly is made up of single-chip microcomputer and comparator, and the output of described DC/DC reduction voltage circuit 4 is connected with the input of integral control circuit 6, is used to feed back the output voltage and the output current information of DC/DC reduction voltage circuit 4; The output of described integral control circuit 6 is connected with the input of DC/DC reduction voltage circuit 4 and the input of DC/AC circuit 5 respectively, is used to control DC/DC reduction voltage circuit 4 and DC/AC circuit 5; This integral control circuit 6 is exported operating voltage and the electric current that is fit to fluorescent tube 9 by the output voltage of detection DC/DC reduction voltage circuit 4 and the feedback information control DC/AC circuit 5 of output current, and the situations such as overvoltage, overcurrent that prevent take place, thereby improve power savings.The input of described integral control circuit 6 is connected with fluorescent tube 9, be used to monitor the operating state of fluorescent tube 9, when open circuit, short circuit, overcurrent, rectifying effect appear in fluorescent tube 9, integral control circuit 6 meeting output protection signals, control DC/DC reduction voltage circuit 4 and DC/AC circuit 5, make the output of DC/AC circuit 5 no-voltages, thus protection fluorescent tube 9, the useful life of prolonging lamp tube 9; When electric ballast itself was overheated, integral control circuit 6 can output control signals to DC/AC circuit 5, reduced the power output of DC/AC circuit 5, had both guaranteed that fluorescent tube 9 can not extinguish, and electric ballast is damaged because of overheated.
The output of present embodiment circuit of power factor correction 3 is connected with low pressure voltage stabilizing circuit 7, be used to each circuit that working power is provided, more particularly, described low pressure voltage stabilizing circuit 7 can be converted to the 400V direct current of circuit of power factor correction 3 inputs the galvanic current of 15V, and deliver in each circuit, for each circuit provides stable working power.
Be provided with igniting output circuit 8 between the integral control circuit 6 of present embodiment and the DC/AC circuit 5, the input of igniting output circuit 8 is connected with the output of integral control circuit 6 and the output of DC/AC circuit 5 respectively, integral control circuit 6 can be given igniting output circuit 8 by the output ignition signal, make igniting output circuit 8 produce several kilovolts pulse voltage, be applied on the fluorescent tube 9, make the discharge tube puncture of fluorescent tube 9 and light fluorescent tube 9, and, keep the brightness of fluorescent tube 9 by the suitable alternating current of DC/AC circuit 5 outputs.
Operation principle of the present utility model is: when integral control circuit 6 is lighted fluorescent tube 9 by igniting output circuit 8, behind the external input AC electricity process EMI filter circuit 1, deliver in the current rectifying and wave filtering circuit 2, by current rectifying and wave filtering circuit 2 alternating current is converted in direct current and the input power factor correcting circuit 3, carry out power factor correction, circuit of power factor correction 3 also boosts to 400V with the direct current of input, deliver to again in low pressure voltage stabilizing circuit 7 and the DC/DC reduction voltage circuit 4, after DC/DC reduction voltage circuit 4 is converted to the magnitude of voltage that is fit to fluorescent tube 9 work with the 400V direct current of importing, deliver in the DC/AC circuit 5, DC/AC circuit 5 is converted to alternating current to the direct current of input, and export to fluorescent tube 9, for fluorescent tube 9 provides working power.
Certainly, the embodiment of the above, it is better embodiment of the present utility model, be not to be used for limiting practical range of the present utility model, so all equivalences of doing according to the described structure of the utility model patent claim, feature and principle change or modify, and are included in the utility model patent claim.
Claims (5)
1, a kind of electric ballast, it comprises current rectifying and wave filtering circuit, DC/AC circuit, it is characterized in that: it also comprises circuit of power factor correction, DC/DC reduction voltage circuit, integral control circuit, the output of described current rectifying and wave filtering circuit is connected with the input of circuit of power factor correction, the output of circuit of power factor correction is connected with the input of DC/DC reduction voltage circuit, the output of DC/DC reduction voltage circuit is connected with the input of DC/AC circuit, and the output of DC/AC circuit is connected with fluorescent tube;
The output of described DC/DC reduction voltage circuit is connected with the input of integral control circuit, is used to feed back the output voltage and the output current information of DC/DC reduction voltage circuit;
The output of described integral control circuit is connected with the input of DC/DC reduction voltage circuit and the input of DC/AC circuit respectively, is used to control DC/DC reduction voltage circuit and DC/AC circuit;
The input of described integral control circuit is connected with fluorescent tube, is used to monitor the operating state of fluorescent tube.
2, a kind of electric ballast according to claim 1, it is characterized in that: further comprise the EMI filter circuit, the input of EMI filter circuit is electrically connected with external input AC, and the output of EMI filter circuit is connected with the input of current rectifying and wave filtering circuit.
3, a kind of electric ballast according to claim 2 is characterized in that: the described input AC electricity that is connected with EMI filter circuit input is 100V～270V.
4, a kind of electric ballast according to claim 1, it is characterized in that: the output of described circuit of power factor correction is connected with the low pressure voltage stabilizing circuit, is used to each circuit that working power is provided.
5, a kind of electric ballast according to claim 1, it is characterized in that: be provided with the igniting output circuit between described integral control circuit and the DC/AC circuit, the input of igniting output circuit is connected with the output of integral control circuit and the output of DC/AC circuit respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200500581U CN201349352Y (en) | 2009-01-14 | 2009-01-14 | Electronic ballast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200500581U CN201349352Y (en) | 2009-01-14 | 2009-01-14 | Electronic ballast |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201349352Y true CN201349352Y (en) | 2009-11-18 |
Family
ID=41368817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200500581U Expired - Fee Related CN201349352Y (en) | 2009-01-14 | 2009-01-14 | Electronic ballast |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201349352Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101883467A (en) * | 2010-06-21 | 2010-11-10 | 东莞市博瀛节能科技有限公司 | Low-frequency electronic ballast for high-intensity gas discharge lamp HID |
-
2009
- 2009-01-14 CN CNU2009200500581U patent/CN201349352Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101883467A (en) * | 2010-06-21 | 2010-11-10 | 东莞市博瀛节能科技有限公司 | Low-frequency electronic ballast for high-intensity gas discharge lamp HID |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091118 Termination date: 20130114 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |