CN205378324U - Electrodeless lamp safety drive circuit that floats - Google Patents

Abstract

The utility model discloses an electrodeless lamp safety drive circuit that floats. The utility model discloses in float the power include current -limiting resistor R1 with safe grid control circuit, go up base resistance R2 block on, resistance R3, down current -limiting resistor R4, down block resistance R5, opto -coupler resistance R8, float ground resistance R9, control triode VT1 block on, triode VT2, down block triode VT3, optoelectronic coupler IC1, just drive triode VT4, burden drive triode VT5, charging diode D1, power electric capacity C1 floats, the single bridge arm resonance drive circuit of electrodeless lamp MOSFET including grid resistance R6 down, down source resistance R7, go up grid resistance R10, go up source resistance R11, go up power control pipe VT6, down power control pipe VT7, go up freewheeling diode D2, freewheeling diode D3, resonant inductance L1, shunt capacitance C2, series capacitance C3, electrodeless lamp Y1 down, be applicable to electrodeless lamp's safe drive control, improve electrodeless lamp resonance drive circuit's reliability.

Description

Non-polarized lamp safe float drive circuit

Technical field

This utility model belongs to lighting field, relates to a kind of circuit, particularly to Non-polarized lamp safe float drive circuit, it is adaptable to the safety of Non-polarized lamp drives and controls, and improves the reliability of Non-polarized lamp resonance drive circuit.

Background technology

HF lamp without electrodes belongs to the forth generation electric light source energy-efficient, long-life of arc discharge, compared with electric filament lamp, under same brightness conditions, the power consumption of Non-polarized lamp is only about 1/6th of electric filament lamp, power savings is notable, has boundless application prospect and market potential.The critical component of Non-polarized lamp is electronic ballast for electrodeless lamp, and this is to realize the longevity of Non-polarized lamp, efficient and powerful core technology.At present, the power drive controlled stage circuit in electronic ballast for electrodeless lamp is generally adopted the scheme of the half-bridge drive circuit based on two MOSFEF and LC resonance circuit composition.Existing scheme is disadvantageous in that: one is the gate driver circuit complexity of two MOSFET in half-bridge power control circuit；Two is that the interlock protection function to upper and lower brachium pontis MOSFET is perfect not, because two MOSFET gate drive signals are once be disturbed, will cause that half-bridge circuit leads directly to and burns inorganic lamp ballast.

Summary of the invention

The purpose of this utility model is the deficiency existed for prior art, for the power drive control problem of inorganic lamp commutator, it is proposed to Non-polarized lamp safe float drive circuit.MOSFET in upper brachium pontis is adopted floating actuation techniques by this circuit, and two MOSFET in upper and lower brachium pontis carry out chain driving control, to simplify inorganic lamp rectifier power drive circuit and to improve safety.

This utility model includes floating power supply and safe grid control circuit, the mono-brachium pontis resonance drive circuit of Non-polarized lamp MOSFET.

nullFloating power supply and safe grid control circuit include upper flow resistance R1、Upper base resistance R2、Upper block resistance R3、Lower current-limiting resistance R4、Lower block resistance R5、Optical coupling resistance R8、Floating earth resistance R9、Control audion VT1、Upper block audion VT2、Lower block audion VT3、Photoelectrical coupler IC1、Just driving audion VT4、Negative driving audion VT5、Charging diode D1、Floating power supply electric capacity C1，One end of upper flow resistance R1 and upper brachium pontis control signal end Uch end、One end of lower block resistance R5 connects，One end of the other end of upper flow resistance R1 and upper base resistance R2、The colelctor electrode of upper block audion VT2 connects，The other end of upper base resistance R2 is connected with the base stage controlling audion VT1，Control the emitter grounding of audion VT1，One end of lower current-limiting resistance R4 and lower brachium pontis control signal end Ucl end、One end of upper block resistance R3 connects，The other end of upper block resistance R3 is connected with the base stage of upper block audion VT2，The emitter grounding of upper block audion VT2，One end of the other end of lower current-limiting resistance R4 and lower resistance R6、The colelctor electrode of lower block audion VT3 connects，The base stage of lower block audion VT3 is connected with the other end of lower block resistance R5，The emitter grounding of lower block audion VT3，The colelctor electrode controlling audion VT1 is connected with the emission side negative electrode of photoelectrical coupler IC1，The emission side anode of photoelectrical coupler IC1 is connected with one end of Optical coupling resistance R8，The other end of Optical coupling resistance R8 and low tension source+VCC end、The anode of charging diode D1 connects，The outlet side colelctor electrode of the negative electrode of charging diode D1 and photoelectrical coupler IC1、Just driving the colelctor electrode of audion VT4、One end of floating power supply electric capacity C1 connects，The outlet side emitter-base bandgap grading of photoelectrical coupler IC1 and the base stage just driving audion VT4、The negative base stage driving audion VT5、One end of floating earth resistance R9 connects，Just driving the emitter-base bandgap grading of audion VT4 and the negative emitter-base bandgap grading driving audion VT5、One end of upper resistance R10 connects；

nullNon-polarized lamp MOSFET mono-brachium pontis resonance drive circuit includes lower resistance R6、Lower source resistance R7、Upper resistance R10、Upper source resistance R11、Upper power controls pipe VT6、Lower power controls pipe VT7、Upper sustained diode 2、Lower sustained diode 3、Resonant inductance L1、Shunt capacitance C2、Series capacitance C3、Non-polarized lamp Y1，One end of the other end of lower resistance R6 and lower source resistance R7、Lower power controls the grid g end of pipe VT7 and connects，The other end ground connection of lower source resistance R7，One end of the other end of upper resistance R10 and upper source resistance R11、Upper power controls the grid g end of pipe VT6 and connects，Upper power controls the drain electrode d end of pipe VT6 and the negative electrode of upper sustained diode 2、High-tension electricity source+Us end connects，Upper power controls the source electrode s end of pipe VT6 and the anode of upper sustained diode 2、The other end of floating earth resistance R9、The negative colelctor electrode driving audion VT5、The other end of floating power supply electric capacity C1、The other end of upper source resistance R11、One end of resonant inductance L1、Lower power controls the drain electrode d end of pipe VT7、The negative electrode of lower sustained diode 3 connects，Lower power controls the source electrode s end ground connection of pipe VT7，The plus earth of lower sustained diode 3，One end of the other end of resonant inductance L1 and shunt capacitance C2、One end of series capacitance C3 connects，The other end ground connection of shunt capacitance C2，The other end of series capacitance C3 is connected with one end of inorganic lamp Y1，The other end ground connection of inorganic lamp Y1.

The beneficial effects of the utility model are as follows:

This utility model utilizes floating actuation techniques that inorganic lamp rectifier power drives the MOSFET grid in the upper brachium pontis in control circuit carry out floating driving to simplify circuit structure, and two MOSFET in upper and lower brachium pontis carries out chain driving control to improve the safety of power driving circuit, reliability.

Accompanying drawing explanation

Fig. 1 is circuit diagram of the present utility model.

Detailed description of the invention

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As it is shown in figure 1, Non-polarized lamp safe float drive circuit, including floating power supply and safe grid control circuit, the mono-brachium pontis resonance drive circuit of Non-polarized lamp MOSFET.

nullFloating power supply and safe grid control circuit include upper flow resistance R1、Upper base resistance R2、Upper block resistance R3、Lower current-limiting resistance R4、Lower block resistance R5、Optical coupling resistance R8、Floating earth resistance R9、Control audion VT1、Upper block audion VT2、Lower block audion VT3、Photoelectrical coupler IC1、Just driving audion VT4、Negative driving audion VT5、Charging diode D1、Floating power supply electric capacity C1，One end of upper flow resistance R1 and upper brachium pontis control signal end Uch end、One end of lower block resistance R5 connects，One end of the other end of upper flow resistance R1 and upper base resistance R2、The colelctor electrode of upper block audion VT2 connects，The other end of upper base resistance R2 is connected with the base stage controlling audion VT1，Control the emitter grounding of audion VT1，One end of lower current-limiting resistance R4 and lower brachium pontis control signal end Ucl end、One end of upper block resistance R3 connects，The other end of upper block resistance R3 is connected with the base stage of upper block audion VT2，The emitter grounding of upper block audion VT2，One end of the other end of lower current-limiting resistance R4 and lower resistance R6、The colelctor electrode of lower block audion VT3 connects，The base stage of lower block audion VT3 is connected with the other end of lower block resistance R5，The emitter grounding of lower block audion VT3，The colelctor electrode controlling audion VT1 is connected with the emission side negative electrode of photoelectrical coupler IC1，The emission side anode of photoelectrical coupler IC1 is connected with one end of Optical coupling resistance R8，The other end of Optical coupling resistance R8 and low tension source+VCC end、The anode of charging diode D1 connects，The outlet side colelctor electrode of the negative electrode of charging diode D1 and photoelectrical coupler IC1、Just driving the colelctor electrode of audion VT4、One end of floating power supply electric capacity C1 connects，The outlet side emitter-base bandgap grading of photoelectrical coupler IC1 and the base stage just driving audion VT4、The negative base stage driving audion VT5、One end of floating earth resistance R9 connects，Just driving the emitter-base bandgap grading of audion VT4 and the negative emitter-base bandgap grading driving audion VT5、One end of upper resistance R10 connects；

nullNon-polarized lamp MOSFET mono-brachium pontis resonance drive circuit includes lower resistance R6、Lower source resistance R7、Upper resistance R10、Upper source resistance R11、Upper power controls pipe VT6、Lower power controls pipe VT7、Upper sustained diode 2、Lower sustained diode 3、Resonant inductance L1、Shunt capacitance C2、Series capacitance C3、Non-polarized lamp Y1，One end of the other end of lower resistance R6 and lower source resistance R7、Lower power controls the grid g end of pipe VT7 and connects，The other end ground connection of lower source resistance R7，One end of the other end of upper resistance R10 and upper source resistance R11、Upper power controls the grid g end of pipe VT6 and connects，Upper power controls the drain electrode d end of pipe VT6 and the negative electrode of upper sustained diode 2、High-tension electricity source+Us end connects，Upper power controls the source electrode s end of pipe VT6 and the anode of upper sustained diode 2、The other end of floating earth resistance R9、The negative colelctor electrode driving audion VT5、The other end of floating power supply electric capacity C1、The other end of upper source resistance R11、One end of resonant inductance L1、Lower power controls the drain electrode d end of pipe VT7、The negative electrode of lower sustained diode 3 connects，Lower power controls the source electrode s end ground connection of pipe VT7，The plus earth of lower sustained diode 3，One end of the other end of resonant inductance L1 and shunt capacitance C2、One end of series capacitance C3 connects，The other end ground connection of shunt capacitance C2，The other end of series capacitance C3 is connected with one end of inorganic lamp Y1，The other end ground connection of inorganic lamp Y1.

What this utility model used includes photoelectrical coupler IC1, control audion VT1, upper block audion VT2, lower block audion VT3, photoelectrical coupler IC1, just drives the main devices that audion VT4, the negative audion VT5 of driving, floating power supply electric capacity C1, upper power control pipe VT6, lower power control pipe VT7 etc. all to adopt existing matured product, it is possible to obtained by market.Such as: photoelectrical coupler adopts 6N136, control audion, upper block audion, lower block audion, just drive audion all to adopt C8050 type NPN audion, negative driving audion adopts C8550 type PNP triode, floating power supply electric capacity adopts CBB capacitor, and power controls pipe and adopts SSH10N80A etc..

Main circuit parameter coordination relation in this utility model is as follows:

If: the emission side rated current of photoelectrical coupler IC1 is I_F, luminous tube pressure drop be V_F, control audion VT1 common-emitter current gain be β, U_cHFor upper brachium pontis control signal U_chHigh level.Then:

$R8=\frac{V_{cc}-V_F}{I_F}---\left(1\right)$

$R1=R2=\mathrm{\β}\frac{U_{cH}-0.7}{4I_F}---\left(2\right)$

R1=R4 (3)

R3=R5=10R1 (4)

R6=R10 (5)

R7=R11=5000R6 (6)

Utility model works process is as follows:

(1) upper brachium pontis control signal U_ch, lower brachium pontis control signal U_clCan not being high level, if there is the rub-out signal of high level simultaneously, then, upper block audion VT2, lower block audion VT3 simultaneously turn on simultaneously, and then make power control pipe VT6, lower power control pipe VT7 and be in the guard mode of safe shutdown；

(2) brachium pontis control signal U instantly_clFor high level, upper brachium pontis control signal U_chDuring for low level, then, upper power controls pipe VT6 and turns off, and lower power controls pipe VT7 conducting, namely low-tension supply+VCC is charged to floating power supply electric capacity C1 by charging diode D1, and the upper power for being then about to conducting controls the gate driver circuit of pipe VT6 and gets out power supply supports conditions；

(3) brachium pontis control signal U instantly_clFor low level, upper brachium pontis control signal U_chDuring for high level, then, lower power controls pipe VT7 and turns off, photoelectrical coupler IC1 output stage is saturated, just driving audion VT4 to turn on, then going up power control pipe VT6 and be also switched on, VT6 gate drive power now is provided by the floating power supply electric capacity C1 voltage charged, because the gate driver circuit of MOSFET is low consumption circuit, so the voltage on floating power supply electric capacity C1 is enough to the power supply support supporting upper power to be controlled during pipe VT6 conducting.

Claims (1)

1. Non-polarized lamp safe float drive circuit, including floating power supply and safe grid control circuit, the mono-brachium pontis resonance drive circuit of Non-polarized lamp MOSFET, it is characterised in that:

nullFloating power supply and safe grid control circuit include upper flow resistance R1、Upper base resistance R2、Upper block resistance R3、Lower current-limiting resistance R4、Lower block resistance R5、Optical coupling resistance R8、Floating earth resistance R9、Control audion VT1、Upper block audion VT2、Lower block audion VT3、Photoelectrical coupler IC1、Just driving audion VT4、Negative driving audion VT5、Charging diode D1、Floating power supply electric capacity C1，One end of upper flow resistance R1 and upper brachium pontis control signal end Uch end、One end of lower block resistance R5 connects，One end of the other end of upper flow resistance R1 and upper base resistance R2、The colelctor electrode of upper block audion VT2 connects，The other end of upper base resistance R2 is connected with the base stage controlling audion VT1，Control the emitter grounding of audion VT1，One end of lower current-limiting resistance R4 and lower brachium pontis control signal end Ucl end、One end of upper block resistance R3 connects，The other end of upper block resistance R3 is connected with the base stage of upper block audion VT2，The emitter grounding of upper block audion VT2，One end of the other end of lower current-limiting resistance R4 and lower resistance R6、The colelctor electrode of lower block audion VT3 connects，The base stage of lower block audion VT3 is connected with the other end of lower block resistance R5，The emitter grounding of lower block audion VT3，The colelctor electrode controlling audion VT1 is connected with the emission side negative electrode of photoelectrical coupler IC1，The emission side anode of photoelectrical coupler IC1 is connected with one end of Optical coupling resistance R8，The other end of Optical coupling resistance R8 and low tension source+VCC end、The anode of charging diode D1 connects，The outlet side colelctor electrode of the negative electrode of charging diode D1 and photoelectrical coupler IC1、Just driving the colelctor electrode of audion VT4、One end of floating power supply electric capacity C1 connects，The outlet side emitter-base bandgap grading of photoelectrical coupler IC1 and the base stage just driving audion VT4、The negative base stage driving audion VT5、One end of floating earth resistance R9 connects，Just driving the emitter-base bandgap grading of audion VT4 and the negative emitter-base bandgap grading driving audion VT5、One end of upper resistance R10 connects；

nullNon-polarized lamp MOSFET mono-brachium pontis resonance drive circuit includes lower resistance R6、Lower source resistance R7、Upper resistance R10、Upper source resistance R11、Upper power controls pipe VT6、Lower power controls pipe VT7、Upper sustained diode 2、Lower sustained diode 3、Resonant inductance L1、Shunt capacitance C2、Series capacitance C3、Non-polarized lamp Y1，One end of the other end of lower resistance R6 and lower source resistance R7、Lower power controls the grid g end of pipe VT7 and connects，The other end ground connection of lower source resistance R7，One end of the other end of upper resistance R10 and upper source resistance R11、Upper power controls the grid g end of pipe VT6 and connects，Upper power controls the drain electrode d end of pipe VT6 and the negative electrode of upper sustained diode 2、High-tension electricity source+Us end connects，Upper power controls the source electrode s end of pipe VT6 and the anode of upper sustained diode 2、The other end of floating earth resistance R9、The negative colelctor electrode driving audion VT5、The other end of floating power supply electric capacity C1、The other end of upper source resistance R11、One end of resonant inductance L1、Lower power controls the drain electrode d end of pipe VT7、The negative electrode of lower sustained diode 3 connects，Lower power controls the source electrode s end ground connection of pipe VT7，The plus earth of lower sustained diode 3，One end of the other end of resonant inductance L1 and shunt capacitance C2、One end of series capacitance C3 connects，The other end ground connection of shunt capacitance C2，The other end of series capacitance C3 is connected with one end of inorganic lamp Y1，The other end ground connection of inorganic lamp Y1.