CN101232763A - Piezoelectric ceramic electric ballast - Google Patents
Piezoelectric ceramic electric ballast Download PDFInfo
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- CN101232763A CN101232763A CNA2008100206333A CN200810020633A CN101232763A CN 101232763 A CN101232763 A CN 101232763A CN A2008100206333 A CNA2008100206333 A CN A2008100206333A CN 200810020633 A CN200810020633 A CN 200810020633A CN 101232763 A CN101232763 A CN 101232763A
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Abstract
The invention relates to an electronic ballast of piezoelectric ceramic, which belongs to the technical field of switch power supply. The electronic ballast comprises piezoelectric ceramic; the two input terminals of piezoelectric ceramic are connected with the AC supply of pre-set frequency; a resonance starting circuit composed of serially-connected inductance elements and capacitance elements is connected between the two output ends of the piezoelectric ceramic; the two ends of the capacitance elements are respectively connected with a first lamp connecting terminal (M) and a second connecting terminal (N) of a gas discharge lamp and lantern. The invention adopts a feasible technical proposal where the piezoelectric ceramic is used for achieving the functions of the ballast; the piezoelectric ceramic not only has the advantages of high reliability and high temperature resistance, but also effectively decreases the pre-stage and last stage electromagnetic interference by an electrical isolation between the pre-stage drive and the last stage load, Furthermore, the whole electronic ballast is ultra-thin, ultra-light and very cost-effective.
Description
Technical field
The present invention relates to a kind of electric ballast, especially a kind of improvement of electric ballast belongs to the switch power technology field.
Background technology
Ballast is the indispensable starter device of gas discharge lamp commonly used.Electric ballast is changed the long-pending heaviness of traditional inductance ballast body, is easy to generate noise, not high enough, the not energy-conservation shortcoming of more, the overall light efficiency of power consumption, becomes the energy-conservation rapidly substitute products of development.Electric ballast is not only of a great variety, and improves and emerge in an endless stream.The Chinese invention patent that for example application number is 200610045836.9, name is called " electronic ballast for high-strength gas discharge lamp " promptly discloses a kind of electronic ballast for high-strength gas discharge lamp.It is made of anti-jamming passive filter, bridge rectifier, passive power factor correcting circuit, semibridge system high frequency conversion circuit and LC series resonant circuit/drive circuit.Though compare with traditional ballast, the electric ballast of this patent has plurality of advantages, but its circuit constitutes comparatively complexity, wherein contains the relatively poor electronic devices such as electrochemical capacitor of reliability, cause this patent electric ballast resistance to elevated temperatures relatively poor, cost is also higher.
Piezoelectric ceramic has under mechanical excitation or alternating current excitation, produces the characteristic of ac high-voltage, therefore on electronic lighter, cathode fluorescent tube backlight electric power application is arranged all.Yet find to be applied on the ballast,, be not applied to ballast though the signal generator that application number is 93212552.2, name is called remote control in the Chinese patent application of " remote control energy-saving daylight lamp " has been mentioned piezoelectric ceramic.
Summary of the invention
The objective of the invention is to:, propose that a kind of circuit is simple, volume is smaller and more exquisite, the piezoelectric ceramic electric ballast of cost less expensive at the shortcoming and defect that above prior art exists.
In order to reach above purpose, one of piezoelectric ceramic electric ballast technical scheme of the present invention is: comprise piezoelectric ceramic, the AC power of two input termination preset frequencies of described piezoelectric ceramic, connect series inductance device and capacitor element between two outputs of described piezoelectric ceramic, the two ends of described capacitor element are drawn respectively and are connect first of gas discharge light fixture and connect lamp end (M) and second and connect lamp end (N).
During use, the two ends of gas discharge light fixture are connect above-mentioned first respectively connect lamp end (M) and second and connect lamp end (N), make it in parallel with capacitor element.During work, encourage piezoelectric ceramic behind two inputs of AC power input piezoelectric ceramic, by the output of boosting of two outputs, excitation resonant inductance and capacitor element generation series resonance, cause the capacitor element two ends and produce quality factor q further boosting doubly, make in the gas discharge bulb in parallel with it and discharge between the electrode, and by inductance component restriction arc current (being the gas discharge lamp current).After changing operate as normal over to, resistive plasma is lacked electric arc because the electrical discharge arc of gaseous discharge lamp is a negative electricity, therefore the voltage at gas discharge light fixture two ends is very low, destroyed the condition of resonance of resonance starting circuit, capacitor element is deactivated, and is converted into inductance component--the series connection alternating current circuit of gas discharge bulb internal resistance.
In order to reach above purpose, when the higher output multiplication of voltage of needs, two of piezoelectric ceramic electric ballast technical scheme of the present invention is: comprise the two-stage piezoelectric ceramic, two input termination AC power of first order piezoelectric ceramic; First output in described first order piezoelectric ceramic two outputs connects first output of second level piezoelectric ceramic by series inductance device and capacitor element, also connects the first input end of second level piezoelectric ceramic simultaneously behind described inductance component by trigger device; The breakover voltage of described trigger device is between the starting voltage and operating voltage of described gas discharge light fixture; Contact between described inductance component and the capacitor element connects the lamp end as being used to connect first of gas discharge light fixture; Second output in described first order piezoelectric ceramic two outputs connects second input and its second output of second level piezoelectric ceramic simultaneously, and second output of described second level piezoelectric ceramic connects the lamp end as being used to connect second of gas discharge light fixture.
During work, behind the AC power input first order piezoelectric ceramic, boosted output, owing to this moment the gas discharge light fixture not starter light and be equivalent to open circuit, so both end voltage will be greater than the breakover voltage of trigger device, second level piezoelectric ceramic is because of the input on-load voltage, and at its output generation starter high pressure, warp lights the light fixture starter with the triggering electric capacity of inductance component resonance.Afterwards, owing to the breakover voltage of light fixture both end voltage less than trigger device, therefore second piezoelectric ceramic is deactivated, and has only the output current of first piezoelectric ceramic to keep light fixture to light a lamp.
This shows that the present invention rationally adopts piezoelectric ceramic and resonant circuit to organically combine with practicable technical scheme cleverly, has realized the ballast function of gaseous discharge lamp.Piezoelectric ceramic not only has higher reliability and resistant to elevated temperatures advantage, and can make whole ballast realize ultra-thin, ultralightization, and cost is also both economical.Compared with prior art, have outstanding substantive distinguishing features and obvious improvement.
Description of drawings
The present invention is further illustrated below in conjunction with accompanying drawing.
Fig. 1 is the circuit theory diagrams of the embodiment of the invention one.
Fig. 2 is the circuit theory diagrams of the embodiment of the invention two.
Fig. 3 is the circuit theory diagrams of the embodiment of the invention three.
Fig. 4 is the circuit theory diagrams of the embodiment of the invention four.
Embodiment
Embodiment one
The piezoelectric ceramic electric ballast of present embodiment as shown in Figure 1, the sinusoidal wave power model of AC/AC (TWA100-XX-XX series) is as the AC power of output preset frequency, two input A of piezoelectric ceramic and B connect two outputs of the sinusoidal wave power model of AC/AC respectively, the resonance starting circuit that series inductance L and capacitor C J constitute between two output L1 of piezoelectric ceramic and the L2, the two ends of capacitor C J are drawn respectively and are connect first of gas discharge light fixture and connect lamp end (M) and second and connect lamp end (N), meet gas discharge bulb HID.
During work, behind two inputs of AC power input piezoelectric ceramic, by the output of boosting of two outputs, excitation inductance and capacitor element generation series resonance, cause capacitor element CJ two ends and produce further boosting of several times, trigger in the gas discharge light fixture in parallel with it and discharge between the electrode, and limit arc current, thereby make the gas discharge light fixture not only obtain current stabilization but also keep operate as normal under the situation of stable arc by inductance component.Owing to change the interior electric arc of gas discharge light fixture of operate as normal over to is the short electric arc of the resistive plasma of negative electricity, so the voltage at its two ends reduces, destroyed the series resonance of above-mentioned inductance and capacitor element, capacitor element is as a result deactivated, and is converted into inductance component--the series connection alternating current circuit of gas discharge light fixture.
In addition, because the power frequency of alternating current circuit light fixture is very high, so the induction reactance of inductance component can be very little, simultaneously because the piezoelectric ceramic output is different from traditional generator power supply, therefore the voltage source that also is different from Transformer Winding has desirable controlled performance.
Embodiment two
The piezoelectric ceramic electric ballast of present embodiment as shown in Figure 2, basic identical with embodiment one, difference is that power supply adopts direct current, after DC/AC module (TWA100-XX-XX series), the high-frequency ac power of piezoelectric ceramic is satisfied in output, offers the input A-B of first order piezoelectric ceramic ZH.Its result of use and advantage are basic identical, do not give unnecessary details in addition.
Embodiment three
The piezoelectric ceramic electric ballast of present embodiment as shown in Figure 3, the two input A-B of first order piezoelectric ceramic ZH meet two output OUT of the DC/AC switch power module (TWM100-XX-XX series) as AC power respectively, and this module can become to exchange sinewave output with the 12V of low-voltage direct chargeable battery EIN input+IN and-IN (or 24V, 36V, 48V) power source conversion.In two outputs of first order piezoelectric ceramic ZH, the first output L1 meets the first output H2 of second level piezoelectric ceramic ZJ by series inductance L and capacitor C J, the first output L1 also meets the first input end C of second level piezoelectric ceramic ZJ by trigger tube TVS after inductance L simultaneously, and the breakover voltage of this trigger tube is between the starting voltage and operating voltage of gas discharge light fixture HID.Contact between inductance L and the capacitor C J connects the utmost point that lamp end M is used to connect gas discharge light fixture HID as first.The second output L2 in first order piezoelectric ceramic ZH two outputs meets the second input D and its second output H1 of second level piezoelectric ceramic ZJ simultaneously, the second output H1 of this second level piezoelectric ceramic meets lamp end N as second, is used to connect another utmost point of gas discharge light fixture HID.
Like this, 12V (or 24V, 36V, 48V) low-voltage direct chargeable battery EIN is behind the DC/AC switch power module, the required tens of volts of piezoelectric ceramic, high frequency (being advisable for tens thousand of hertz) AC sine wave are satisfied in output, offer the input A-B of first order piezoelectric ceramic ZH, behind this piezoelectric ceramic step-up, by its output H1-H2 output alternating current, through the inductance L current limliting gaseous discharge lamp that maintainings lights up to thousands of volts.Before gas discharge light fixture HID did not light, HID was equivalent to open circuit, so its both end voltage is greater than the breakover voltage of trigger tube TVS.The second level piezoelectric ceramic ZJ input C-D that starter is used obtains the voltage of first order output, drives ZJ output H1-H2 and produces the starter high pressure, makes the HID starter under the effect that triggers capacitor C J.Afterwards, the work of HID lamp, its both end voltage is less than the breakover voltage of TVS, and second level piezoelectric ceramic ZJ deactivates, and the HID lamp keeps lamp luminescence by the high pressure of first order piezoelectric ceramic ZH output after the inductance L current limliting.
Experimental results show that, the two-stage piezoelectric ceramic of present embodiment not only can cooperatively interact, both having produced enough high pressure assurance gaseous discharge lamp discharges lights, can keep its normal illumination again, and has electricity isolation usefulness between its prime driving and the back level load, level electromagnetic interference before and after can eliminating, practical, can give full play to the heatproof advantage of piezoelectric ceramic, make ultra-thin, ultralight, resistant to elevated temperatures piezoelectric ceramic HID lamp electronic ballast, all more have superiority than existing like product at aspects such as volume, weight, reliability, prices.
Embodiment four
The piezoelectric ceramic electric ballast of present embodiment and embodiment three are basic identical, as shown in Figure 4, difference is that power supply directly adopts civil power, behind the sinusoidal wave power model of AC/AC (TWA100-XX-XX series), the high-frequency ac sine wave of piezoelectric ceramic is satisfied in output, offers the input A-B of first order piezoelectric ceramic ZH.Its result of use and advantage are basic identical.
In addition to the implementation, the present invention can also have other execution modes.For example piezoelectric ceramic both can be a single-chip, also can be the polycrystalline sheet; Both can be the individual layer piezoelectric ceramic, also can be multilayer piezoelectric ceramic; Both can be symmetric form, also can be for asymmetric.Every usefulness is equal to the technical scheme of replacement or equivalent transformation formation, all drops on the protection range of requirement of the present invention.
Claims (9)
1. piezoelectric ceramic electric ballast, comprise piezoelectric ceramic, it is characterized in that: the AC power of two input termination preset frequencies of described piezoelectric ceramic, connect series inductance device and capacitor element between two outputs of described piezoelectric ceramic, the two ends of described capacitor element are drawn respectively and are connect first of gas discharge light fixture and connect lamp end (M) and second and connect lamp end (N).
2. according to the described piezoelectric ceramic electric ballast of claim 1, it is characterized in that: described input power supply connects the DC/AC switch power module by the low-voltage direct chargeable battery and constitutes.
3. according to the described piezoelectric ceramic electric ballast of claim 1, it is characterized in that: described input power supply connects the sinusoidal wave power model of AC/AC by civil power and constitutes.
4. according to claim 2 or 3 described piezoelectric ceramic electric ballasts, it is characterized in that: described piezoelectric ceramic is the single-chip piezoelectric ceramic.
5. according to claim 2 or 3 described piezoelectric ceramic electric ballasts, it is characterized in that: described piezoelectric ceramic is a polycrystalline sheet piezoelectric ceramic.
6. piezoelectric ceramic electric ballast comprises piezoelectric ceramic, it is characterized in that: described piezoelectric ceramic has two-stage, two input termination AC power of first order piezoelectric ceramic; First output in described first order piezoelectric ceramic two outputs connects first output of second level piezoelectric ceramic by series inductance device and capacitor element, also connects the first input end of second level piezoelectric ceramic simultaneously behind described inductance component by trigger device; The breakover voltage of described trigger device is between the starting voltage and operating voltage of described gas discharge light fixture; Contact between described inductance component and the capacitor element connects the lamp end as being used to connect first of gas discharge light fixture; Second output in described first order piezoelectric ceramic two outputs connects second input and its second output of second level piezoelectric ceramic simultaneously, and second output of described second level piezoelectric ceramic connects the lamp end as being used to connect second of gas discharge light fixture.
7. according to the described piezoelectric ceramic electric ballast of claim 6, it is characterized in that: described trigger device is a trigger tube.
8. according to the described piezoelectric ceramic electric ballast of claim 7, it is characterized in that: described piezoelectric ceramic is the single-chip piezoelectric ceramic.
9. described according to Claim 8 piezoelectric ceramic electric ballast is characterized in that: described piezoelectric ceramic is a polycrystalline sheet piezoelectric ceramic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100206333A CN101232763A (en) | 2008-02-18 | 2008-02-18 | Piezoelectric ceramic electric ballast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100206333A CN101232763A (en) | 2008-02-18 | 2008-02-18 | Piezoelectric ceramic electric ballast |
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| Publication Number | Publication Date |
|---|---|
| CN101232763A true CN101232763A (en) | 2008-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100206333A Pending CN101232763A (en) | 2008-02-18 | 2008-02-18 | Piezoelectric ceramic electric ballast |
Country Status (1)
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|---|---|
| CN (1) | CN101232763A (en) |
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2008
- 2008-02-18 CN CNA2008100206333A patent/CN101232763A/en active Pending
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Application publication date: 20080730 |