CN203896573U - Electrodeless high-voltage pulse triggering low-voltage holding circuit - Google Patents
Electrodeless high-voltage pulse triggering low-voltage holding circuit Download PDFInfo
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- CN203896573U CN203896573U CN201420267366.0U CN201420267366U CN203896573U CN 203896573 U CN203896573 U CN 203896573U CN 201420267366 U CN201420267366 U CN 201420267366U CN 203896573 U CN203896573 U CN 203896573U
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Abstract
The utility model discloses an electrodeless high-voltage pulse triggering low-voltage holding circuit, mainly solves problems that the prior art is in lack of a pulse triggering low-voltage holding circuit which is reasonable in design, high in performance cost ratio, high in reliability, and easy in implementation, and a pulse triggering low-voltage holding circuit in the prior art cannot satisfy actual demand. The electrodeless high-voltage pulse triggering low-voltage holding circuit comprises a control processing chip, a drive chip connected with two PWM pulse output ports of the control processing chip, a driver transformer U whose two ends of a primary winding are connected with the drive chip, a MOS tube Q1 and a MOS tube Q2 respectively connected with two secondary windings, an overvoltage protection circuit connected among the MOS tube Q1, the MOS tube Q2, and the control processing chip. The grid electrode of the MOS tube Q1 is connected with the drain electrode of the MOS tube Q2. The driver transformer U is provided with two secondary windings. Through the above scheme, the electrodeless high-voltage pulse triggering low-voltage holding circuit achieves objectives of high performance cost ratio and convenient use, and is safe and reliable, and satisfies actual needs. The holding circuit has very high practical value and popularization value.
Description
Technical field
The utility model relates to a kind of electrodeless high-voltage pulse and triggers low voltage sustain circuit.
Background technology
Non-polarized lamp as the 4th generation green illumination have wide market application foreground, it is the main trend of following illuminating industry development, its operation principle is the high frequency producing while utilizing ballast resonant, high voltage electric field, through coupler, produce alternating magnetic field, magnetic field enters in bulb chamber through glass bulb, alternating magnetic field produces alternating electric field, under high-frequency and high-voltage effect, in bulb, gas avalanche ionization forms plasma, the mercury atom of being excited in plasma gives off the ultraviolet ray of 254nm in returning to ground state process, bulb inner wall fluorescent material is subject to ultraviolet ray irradiation and converts visible ray to.As can be seen here, the luminous of Non-polarized lamp mainly consists of these three-major-items of ballast, coupler and cell-shell, indispensable, and this three's optimum Match just can guarantee that Non-polarized lamp is normally luminous, and has good light efficiency.
Due to the factor in device production process, the consistency of parts is difficult to solve, and this brings insoluble characteristic issues to Proper Match.At present, electronic ballast of electrodeless lamp is continued to use many companies in the past more and is aimed at the special chip that electrode Fluorescent light modulation designs, and builds power output circuit.Adopt separate excitation mode to start down sweep from high frequency, first radio-frequency preheating reduces gradually and through resonance point, produces high pressure lamp is excited and lighted, and then drops to operating frequency by the lamp low voltage sustain after lighting.Yet these chips are inevitable is not the special chip for electrodeless Fluorescent light modulation design, the long-life of reliability and stability Nan Yi Full foot Non-polarized lamp in use, highly reliable actual requirement.
Because different gas has different excitation energies and ionization energy, electron collision atom also makes it ionization, the gas excitation energy of this atom that its atom has accelerates electronics in having the poor electric field of certain potentials, electronics can obtain maximum energy, can make gas ionization, energy is now called ionization energy.Under certain gas part part, when discharge electric field reaches critical value, gas just will puncture, and become conductor state.
(when ionization energy is a certain amount of) so under given conditions, excitation energy plays key factor.The physical characteristic of electrodeless bulb shell always exists the deviation of production process in manufacturing process, and the difference of environment for use condition makes the ionization ignition condition of Non-polarized lamp occur uncertain factor.But the Non-polarized lamp of manufacturing with technique (ionization luminous element-big gun shell), all can be considered and has a minimum breakdown condition.For meeting Non-polarized lamp deviation in process of production, and according to gas discharge theory, use hf and hv pulse string igniting triggering technique, the trigger impulse energy that makes to light a fire punctures energy condition much larger than minimum, and the phenomenon that the sporadic appearance of Non-polarized lamp that Non-polarized lamp is caused because of the problem of matching can not be lighted is difficult to fundamentally thoroughly solve.
Utility model content
The purpose of this utility model is to provide a kind of electrodeless high-voltage pulse to trigger low voltage sustain circuit, mainly solve the shortage existing in prior art a kind of reasonable in design, cost performance is high, reliability is high, implement pulse-triggered low voltage sustain circuit easily, problem that can not practical requirement.
To achieve these goals, the technical solution adopted in the utility model is as follows:
Electrodeless high-voltage pulse triggers low voltage sustain circuit, comprise control process chip, the driving chip being connected by two pwm pulse output ports of resistance R 1 and resistance R 2 and control process chip respectively, one time winding two ends are connected with driving chip with capacitor C 1 by resistance R 5 respectively, and be provided with the driving transformer U of two secondary winding, the metal-oxide-semiconductor Q1 being connected with two secondary winding respectively and metal-oxide-semiconductor Q2, be connected in metal-oxide-semiconductor Q1, overvoltage crowbar between metal-oxide-semiconductor Q2 and control process chip, be connected in the source electrode of metal-oxide-semiconductor Q1 and the diode D1 between a secondary winding wherein, be connected in the source electrode of metal-oxide-semiconductor Q2 and the diode D2 between another secondary winding, the grid of described metal-oxide-semiconductor Q1 is connected with the drain electrode of metal-oxide-semiconductor Q2, between the grid of described metal-oxide-semiconductor Q1 and source electrode, be connected with resistance R 6, between the grid of described metal-oxide-semiconductor Q2 and source electrode, be connected with resistance R 7.
Specifically, described overvoltage crowbar comprises that in-phase input end is connected in the operational amplifier T2 of metal-oxide-semiconductor Q2 grid by resistance R 10, be connected in the output of operational amplifier T2 and control the resistance R 11 between process chip, the operational amplifier T1 that output is connected with control process chip by resistance R 14, be connected in the in-phase input end of operational amplifier T1 and the diode D6 between ground, one end is connected with the in-phase input end of operational amplifier T1, the other end is by the resistance R 13 of capacitor C 7 ground connection, one end is connected between resistance R 13 and capacitor C 7, the other end is by the diode D5 of diode D4 ground connection, one end is connected between diode D4 and diode D5, the resistance R 12 of other end ground connection, one end is connected between diode D4 and diode D5, the other end is connected with the grid of metal-oxide-semiconductor Q2 by capacitor C 3 respectively, the resistance R 8 being connected with the grid of metal-oxide-semiconductor Q1 by capacitor C 2.
Further, the inverting input of described operational amplifier T2 is connected with output; The inverting input of described operational amplifier T1 is connected with output; Between the in-phase input end of described operational amplifier T2 and ground, be connected with diode D3.
Consider actual demand, between described capacitor C 2 and the grid of metal-oxide-semiconductor Q1, be connected with PFC circuit for rectifying.
As preferably, described control process chip is STC15F408AD; Driving chip is IXD602; Described operational amplifier T1 and operational amplifier T2 are MC4558.
In the utility model, described control process chip is connected with clock circuit, communication interface circuit and crystal oscillating circuit.
Compared with prior art, the utlity model has following beneficial effect:
(1) the utility model is selected specific chip, and circuit is carried out to ingehious design, realized the object that high-efficient simple starts and maintain Non-polarized lamp brightness, again in implementation process, only need export the pwm pulse ripple of generation to electrodeless lamp coupler and just can realize pulse-triggered and low voltage sustain, reasonable in design, cost performance is higher, reliability is higher, realistic demand, is applicable to large-scale promotion application.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the utility model-embodiment.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail, and execution mode of the present utility model includes but not limited to the following example.
Embodiment
As shown in Figure 1, the utility model discloses a kind of electrodeless high-voltage pulse and trigger low voltage sustain circuit, adopt at a high speed, highly reliable, low-power consumption, superpower jamproof singlechip chip STC15F408AD of new generation be as controlling process chip, when implementing, adopt the PCA high-speed pulse output mode of this control process chip, by register is set, the positive negative pulse stuffing of output two-way duty ratio 50%, frequency 240KHz, through power drive chip I XD602 output, as control signal, its concrete application principle is as follows:
The pwm pulse of controlling process chip output two-way paraphase complementation is ripple, and duty cycle square wave is respectively 50%, width is that 2.08us, Dead Time are 250ns, at half-bridge center line, forms 2.08us width, and repetition interval equals the high-frequency pulse string of 200ns.This pulse train simultaneously also as the sinusoidal power stage after resonant transformation to electrodeless lamp coupler.The high-frequency pulse string of 240KHz is identical with the resonance point of resonant circuit, when the unignited load equivalent impedance of Non-polarized lamp is tending towards infinity, to on coupler, produce the high frequency voltage of about 5KV, the gas under the high frequency voltage of 5KV in lamp housing by fast electric from, complete igniting.The duration of ignition of Non-polarized lamp, 45us can complete under normal circumstances, so at burn period device for power switching in serious overload, therefore require ignition energy to be eager to excel, and complete with maximum energy, the fastest speed, make device for power switching fast excessively to normal work.Direct voltage pulse firing is best selection, once the necessary quick closedown of loss of ignition, and again light a fire to protecting to conditionity.
When implementing; the utility model preferably reaches igniting and the object of protecting by the restriction high pressure time, and when startup output PWM produces igniting high pressure, control process chip samples in coupler high pressure by capacitance partial pressure; timer starts timing; 1ms when detected igniting high pressure is higher than certain set-point after the time, assert loss of ignition, now closes PWM output; the operation of again lighting a fire after time delay; after quadruplication, light a fire still unsuccessful, start-up performance locking, protection ballast.Once light a fire, successful Non-polarized lamp equivalence resistance straight line declines, and has changed condition of resonance, coupler high pressure disappears and enters normal work.Modulating voltage detects after controlling process chip judgement, carries out the monitoring program of various settings.
Controlling process chip STC15F408AD obtains after 5V VCC voltage, the pwm pulse of output two-way paraphase complementation is ripple, duty cycle square wave is respectively 50%, width is 2.08us, Dead Time: 250ns, at half-bridge center line, forms 2.08us width, and repetition interval equals the high-frequency pulse string of 200ns.Through IXD602 MOS, drive chip to increase after driving force, deliver to driving transformer U upper, secondary two secondary winding drive respectively half-bridge to manage up and down metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2 the drive waveforms of 15V.Then metal-oxide-semiconductor Q1 upper end is the stable 440V direct voltage after being corrected by PFC, and by two metal-oxide-semiconductor alternate conduction, the high-voltage pulse ripple that produces 240KHZ is added on resonance circuit, as the sinusoidal power stage after resonant transformation to electrodeless lamp coupler.The high-frequency pulse string of 240KHz is identical with the resonance point of resonant circuit, when the unignited load equivalent impedance of Non-polarized lamp is tending towards infinity, to on coupler, produce the high frequency voltage of about 5KV, the gas under the high frequency voltage of 5KV in lamp housing by fast electric from, complete igniting.The control of the duration of ignition of Non-polarized lamp is extremely important, 45us can complete under normal circumstances, so at burn period device for power switching in serious overload, therefore require ignition energy to be eager to excel, and with maximum energy, the fastest speed, complete, make device for power switching fast excessively to normal work.Direct voltage pulse firing is best selection, once the necessary quick closedown of loss of ignition, and again light a fire to protecting to conditionity.
Overvoltage crowbar is to utilize capacitor sampling at lamp output; again through electric resistance partial pressure; diode rectification; through electric resistance partial pressure, through voltage follower, be added to single-chip microcomputer again; while setting high current potential through operational amplifier MC4558, start single-chip microcomputer protection; locking output PWM. overcurrent protection is the resistance that connects 0.1ohm on major loop, when overcurrent, can on 0.1ohm resistance, form too high pressure drop, by operational amplifier MC4558 power amplifier chips, is added on single-chip microcomputer and is made its locking export PWM.
As shown in Figure 1, the circuit of realizing of the present utility model comprises control process chip, the driving chip being connected by two pwm pulse output ports of resistance R 1 and resistance R 2 and control process chip respectively, one time winding two ends are connected with driving chip with capacitor C 1 by resistance R 5 respectively, and be provided with the driving transformer U of two secondary winding, the metal-oxide-semiconductor Q1 being connected with two secondary winding respectively and metal-oxide-semiconductor Q2, be connected in metal-oxide-semiconductor Q1, overvoltage crowbar between metal-oxide-semiconductor Q2 and control process chip, be connected in the source electrode of metal-oxide-semiconductor Q1 and the diode D1 between a secondary winding wherein, be connected in the source electrode of metal-oxide-semiconductor Q2 and the diode D2 between another secondary winding, the grid of described metal-oxide-semiconductor Q1 is connected with the drain electrode of metal-oxide-semiconductor Q2, between the grid of described metal-oxide-semiconductor Q1 and source electrode, be connected with resistance R 6, between the grid of described metal-oxide-semiconductor Q2 and source electrode, be connected with resistance R 7.Described overvoltage crowbar comprises that in-phase input end is connected in the operational amplifier T2 of metal-oxide-semiconductor Q2 grid by resistance R 10, be connected in the output of operational amplifier T2 and control the resistance R 11 between process chip, the operational amplifier T1 that output is connected with control process chip by resistance R 14, be connected in the in-phase input end of operational amplifier T1 and the diode D6 between ground, one end is connected with the in-phase input end of operational amplifier T1, the other end is by the resistance R 13 of capacitor C 7 ground connection, one end is connected between resistance R 13 and capacitor C 7, the other end is by the diode D5 of diode D4 ground connection, one end is connected between diode D4 and diode D5, the resistance R 12 of other end ground connection, one end is connected between diode D4 and diode D5, the other end is connected with the grid of metal-oxide-semiconductor Q2 by capacitor C 3 respectively, the resistance R 8 being connected with the grid of metal-oxide-semiconductor Q1 by capacitor C 2.The inverting input of described operational amplifier T2 is connected with output; The inverting input of described operational amplifier T1 is connected with output; Between the in-phase input end of described operational amplifier T2 and ground, be connected with diode D3.Between described capacitor C 2 and the grid of metal-oxide-semiconductor Q1, be connected with PFC circuit for rectifying.
Consider actual demand, described control process chip is connected with clock circuit, communication interface circuit and crystal oscillating circuit etc.
On the basis of foregoing circuit, the present embodiment is also connected with part auxiliary element and line, and for guaranteeing the normal operation of circuit, the use of these auxiliary elements belongs to the circuit application custom of industry universal, does not repeat them here.
According to above-described embodiment, just can realize well the utility model.
Claims (7)
1. electrodeless high-voltage pulse triggers low voltage sustain circuit, it is characterized in that, comprise control process chip, the driving chip being connected by two pwm pulse output ports of resistance R 1 and resistance R 2 and control process chip respectively, one time winding two ends are connected with driving chip with capacitor C 1 by resistance R 5 respectively, and be provided with the driving transformer U of two secondary winding, the metal-oxide-semiconductor Q1 being connected with two secondary winding respectively and metal-oxide-semiconductor Q2, be connected in metal-oxide-semiconductor Q1, overvoltage crowbar between metal-oxide-semiconductor Q2 and control process chip, be connected in the source electrode of metal-oxide-semiconductor Q1 and the diode D1 between a secondary winding wherein, be connected in the source electrode of metal-oxide-semiconductor Q2 and the diode D2 between another secondary winding, the grid of described metal-oxide-semiconductor Q1 is connected with the drain electrode of metal-oxide-semiconductor Q2, between the grid of described metal-oxide-semiconductor Q1 and source electrode, be connected with resistance R 6, between the grid of described metal-oxide-semiconductor Q2 and source electrode, be connected with resistance R 7.
2. electrodeless high-voltage pulse according to claim 1 triggers low voltage sustain circuit, it is characterized in that, described overvoltage crowbar comprises that in-phase input end is connected in the operational amplifier T2 of metal-oxide-semiconductor Q2 grid by resistance R 10, be connected in the output of operational amplifier T2 and control the resistance R 11 between process chip, the operational amplifier T1 that output is connected with control process chip by resistance R 14, be connected in the in-phase input end of operational amplifier T1 and the diode D6 between ground, one end is connected with the in-phase input end of operational amplifier T1, the other end is by the resistance R 13 of capacitor C 7 ground connection, one end is connected between resistance R 13 and capacitor C 7, the other end is by the diode D5 of diode D4 ground connection, one end is connected between diode D4 and diode D5, the resistance R 12 of other end ground connection, one end is connected between diode D4 and diode D5, the other end is connected with the grid of metal-oxide-semiconductor Q2 by capacitor C 3 respectively, the resistance R 8 being connected with the grid of metal-oxide-semiconductor Q1 by capacitor C 2.
3. electrodeless high-voltage pulse according to claim 2 triggers low voltage sustain circuit, it is characterized in that, the inverting input of described operational amplifier T2 is connected with output; The inverting input of described operational amplifier T1 is connected with output; Between the in-phase input end of described operational amplifier T2 and ground, be connected with diode D3.
4. electrodeless high-voltage pulse according to claim 3 triggers low voltage sustain circuit, it is characterized in that, between described capacitor C 2 and the grid of metal-oxide-semiconductor Q1, is connected with PFC circuit for rectifying.
5. electrodeless high-voltage pulse according to claim 1 triggers low voltage sustain circuit, it is characterized in that, described control process chip is STC15F408AD; Driving chip is IXD602.
6. electrodeless high-voltage pulse according to claim 1 triggers low voltage sustain circuit, it is characterized in that, described operational amplifier T1 and operational amplifier T2 are MC4558.
7. according to the electrodeless high-voltage pulse described in claim 1 ~ 6 any one, trigger low voltage sustain circuit, it is characterized in that, described control process chip is connected with clock circuit, communication interface circuit and crystal oscillating circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420267366.0U CN203896573U (en) | 2014-05-23 | 2014-05-23 | Electrodeless high-voltage pulse triggering low-voltage holding circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420267366.0U CN203896573U (en) | 2014-05-23 | 2014-05-23 | Electrodeless high-voltage pulse triggering low-voltage holding circuit |
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| CN203896573U true CN203896573U (en) | 2014-10-22 |
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| CN201420267366.0U Expired - Fee Related CN203896573U (en) | 2014-05-23 | 2014-05-23 | Electrodeless high-voltage pulse triggering low-voltage holding circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104797065A (en) * | 2015-04-10 | 2015-07-22 | 浙江宇光照明科技有限公司 | Electrodeless lamp circuit |
| CN114545175A (en) * | 2022-03-02 | 2022-05-27 | 江苏盛华电气有限公司 | SF6 gas impulse voltage generator capable of reducing electric field intensity |
-
2014
- 2014-05-23 CN CN201420267366.0U patent/CN203896573U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104797065A (en) * | 2015-04-10 | 2015-07-22 | 浙江宇光照明科技有限公司 | Electrodeless lamp circuit |
| CN104797065B (en) * | 2015-04-10 | 2018-05-01 | 浙江宇光照明科技有限公司 | A kind of nonpolar lamp circuit |
| CN114545175A (en) * | 2022-03-02 | 2022-05-27 | 江苏盛华电气有限公司 | SF6 gas impulse voltage generator capable of reducing electric field intensity |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 610000 Sichuan province Chengdu city Chengdu district modern PI Du industrial area north Hong Kong four North Road No. 277 Co-patentee after: CHENGDU DONGXU CONSTRUCTION ENGINEERING Co.,Ltd. Patentee after: CHENGDU DONGXU INTELLIGENT TECHNOLOGY Co.,Ltd. Address before: Pixian 610000 Sichuan Province, Chengdu city Chengdu industrial area north of the four Hong Kong Modern North Road No. 277 Co-patentee before: CHENGDU DONGXU CONSTRUCTION ENGINEERING Co.,Ltd. Patentee before: CHENGDU TUNGHSU LIGHTING TECHNOLOGY CO.,LTD. |
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| CP03 | Change of name, title or address | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170816 Address after: 610000 Sichuan province Chengdu city Chengdu district modern PI Du industrial area north Hong Kong four North Road No. 277 Patentee after: CHENGDU DONGXU INTELLIGENT TECHNOLOGY Co.,Ltd. Address before: 610000 Sichuan province Chengdu city Chengdu district modern PI Du industrial area north Hong Kong four North Road No. 277 Co-patentee before: CHENGDU DONGXU CONSTRUCTION ENGINEERING Co.,Ltd. Patentee before: CHENGDU DONGXU INTELLIGENT TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141022 |
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| CF01 | Termination of patent right due to non-payment of annual fee |