CN2502485Y - High power factor electronic ballast for controlling high voltage gas discharge lamp - Google Patents

Abstract

The utility model provides a high power factor electronic ballast for controlling high voltage gas discharge lamp and consists of an electromagnetic interference-preventing and resistance-blocking filter without power, a full-wave bridge rectifier circuit, an active power factor adjusting and controlling circuit, an assistant electricity supply electricity resource connected with DC-AC inverter circuit and light start point circuit, a soft start signal processing circuit, an abnormal protection processing circuit connected with DC-AC inverter circuit and light start point circuit, and a lamp resonance-eliminating circuit connected with the full-wave bridge rectifier circuit and the DC-AC inverter circuit. The high power factor electronic ballast has the whole power factor more than 0.99. The lamp-house illuminates stably in balance. The utility model has the obvious advantages of wide usage of outer-electricity pressure, little power consumption, low cost and high quality illuminance.

Description

High Power Factor Electronic Ballasts for Controlling High Pressure Discharge Lamps

technical field

The utility model relates to a high power factor electronic ballast for controlling a high-pressure gas discharge lamp. Belongs to lighting equipment.

Background technique

High-power high-pressure gas discharge lamp ballasts currently mostly use inductive low-frequency choke coils, which are bulky, low power factor (about 0.46), high energy consumption, and large harmonic content; when multiple gas discharge lamps distributed in sheets At the same time, when it is started and lit, the surge current will cause a large impact on the power grid and affect the quality of power supply; the gas discharge lamp working under the excitation of power frequency (50Hz) has a flickering feeling and has the obvious disadvantage of low light quality; in addition , the high-pressure gas discharge lamp powered by an inductive low-frequency choke coil will go out when the external power grid voltage fluctuates greatly.

In the past, electronic ballasts used to control high-pressure gas discharge lamps used a combination of multiple discrete components and operational amplifier IC units with a single function to complete line power factor adjustment and other related control functions. Due to the increase in the number of components, lead to an increase in the incidence of device failure.

Electronic ballasts designed to control high-pressure gas discharge lamps in the past generally use a single-frequency quasi-sine wave far away from the acoustic resonance window as the power supply for the lamp. However, lamps of different brands or even the same brand but with different production batches will still produce acoustic resonance due to the consistency of lamp discharge tube size and material, and sometimes it will be serious; acoustic resonance will greatly damage the life of the lamp, and in severe cases It may even damage the discharge tube, and the jittering light can easily cause visual fatigue and damage people's eyesight.

Utility model content

The purpose of this utility model is to provide a lamp that can effectively avoid the acoustic resonance phenomenon, no flicker, high power factor, low harmonics, no surge current due to the same starting current and normal working current, and large-scale fluctuations in external electricity. No extinguishing, no need to consume a lot of copper and silicon steel sheets, light weight, reliable operation of the whole machine, long service life, high integration, few components and low cost, no matter whether the lamp is short circuited or the lamp is open, it will not cause damage to the internal and external circuits. High power factor electronic ballasts for controlling high pressure gas discharge lamps.

The high power factor electronic ballast for controlling high-pressure gas discharge lamps of the utility model includes: an electromagnetic interference suppression-blocking passive filter (1), connected to the electromagnetic interference suppression-blocking passive filter (1) A full-wave bridge rectifier circuit (2) and a transformer made of magnetic materials; the electronic ballast also includes the following circuit: an active power factor adjustment circuit connected in sequence with the full-wave bridge rectifier circuit (2) Control circuit (3), DC-AC inverter circuit (4) and lamp start circuit (5), and active power factor adjustment control circuit (3), DC-AC inverter circuit (4) and lamp start circuit (5) The auxiliary power supply (6) connected, the soft start-signal processing circuit (7) connected with the DC-AC inverter circuit (4), the lamp starting point circuit (5) and the auxiliary power supply (6), and An abnormality protection processing circuit (8) connected to the DC-AC inverter circuit (4) and the lamp starting point circuit (5), and a full-wave bridge rectifier circuit (2) connected to the DC-AC inverter circuit (4) Lamp resonance elimination circuit (9).

In the high power factor electronic ballast for controlling high pressure gas discharge lamps of the utility model, the magnetic material is amorphous alloy material, nano crystal alloy material or ferrite material.

In the high power factor electronic ballast for controlling high-pressure gas discharge lamps of the present invention, the active power factor adjustment control circuit consists of a PFC integrated circuit, a switch tube 1, a diode 1, an energy storage inductor, and a continuous energy-smoothing wave Capacitor, resistor three, resistor four, resistor six, resistor seven, resistor eight, resistor nine, resistor one zero, resistor one one, resistor one two, resistor three three, capacitor two five, capacitor eight, capacitor nine, capacitor one zero, Capacitors are composed of one by one; the input end of the energy storage inductor is connected to the output end of the full-wave bridge rectifier circuit and the resistor three connected in series with the resistor four, and the capacitor two and five connected at the other end to the ground are connected in parallel with the resistor four and connected to the "" of the PFC integrated circuit MULT” pin, the output end of the energy storage inductor is connected to the anode of the diode 1 and the drain of the switch tube 1 connected in series with the resistors one by one, the cathode of the diode 1 is connected to the resistor 33, the positive pole of the continuous energy-smoothing capacitor and the DC- The drain of the switch tube 4 of the AC inverter circuit is connected, the other end of the resistor 33 is connected in series with the resistor 12 connected in parallel with the capacitor 11, the gate of the switch tube 1 is connected to the resistor 10 and the parallel capacitor 10 and resistor 8 The other end of the capacitor 10 and resistor 8 connected in parallel is connected to the GD pin of the PFC integrated circuit, and the other end of the resistor 10, resistor 11, resistor 12, capacitor 11 and continuous energy-smoothing capacitor is grounded , the other end of capacitor eight and capacitor nine grounded at one end are respectively connected to the "COMP" and CS pins of the PFC integrated circuit, and the resistor nine is connected between the "CS pin" of the PFC integrated circuit and the source of the switch tube one, the auxiliary power supply The output of the secondary coil 33 of the pulse transformer 1 is connected to the "ZCD" pin of the PFC integrated circuit through the resistor 6, the negative pole of the diode 2 of the auxiliary power supply is connected to the Vcc pin of the PFC integrated circuit and the resistor 7, and the other of the resistor 7 One end is connected to the anode of diode two.

In the high power factor electronic ballast for controlling high-pressure gas discharge lamps of the present utility model, the DC-AC inverter circuit is composed of a pulse width adjustment controller, two switch tubes, three switch tubes, four switch tubes, and five switch tubes. Transistor 1, Transistor 2, Transistor 3, Transformer 2, Transformer 3, Diode 9, Diode 10, Zener Diode 1, Zener Diode 2, Zener Diode 3, Zener Diode 4, Resistor 17, Resistor 19, Resistance two, resistance two one, resistance two two, resistance two three, resistance two four, resistance two five, resistance two six, resistance two seven, resistance two nine, resistance three zero, resistance three one, capacitance one six, capacitance one 7. Capacitor 18, capacitor 19, capacitor 20, and capacitor 23; among them, the REF, OC, "1IN+" and "2IN-" pins of the pulse width adjustment controller are shorted and combined with the resistor 21 The resistors in series are connected to 20, the capacitor 17, resistor 19, capacitor 18, and resistor 22 are respectively connected to the CT, RT of the pulse width adjustment controller and the short-circuited C1 and C2 pins, and the other pins of the resistor 22 One end is connected between the primary input terminals of the transformer two and the transformer three connected in series and connected with the Vcc terminal of the pulse width adjustment controller, and the primary input terminals of the transformer two and the transformer three are respectively connected with a capacitor 19 and a capacitor 20, The output terminals E2 and E1 of the pulse width adjustment controller are respectively connected to the gates of the switch tube 2 and the switch tube 3, and the resistors 23 and 24 are respectively connected between the gate and the source of the switch tube 2 and the switch tube 3. and resistor two and five, the drains of switch tube two and switch tube three are respectively connected to the other primary ends of transformer two and three, and the secondary ends of transformer two and three are respectively connected to resistor two and five, resistor two six and diode nine The negative pole of resistor 29, resistor 30 and the negative pole of diode 10 are connected, and the other end of resistor 25 and resistor 29 are respectively connected to the collector of triode 2, Zener diode 1 and the negative pole of Zener diode 2 and triode 3 The collector of Zener diode 3 and the negative pole of Zener diode 4 are connected, the other end of resistor 26 and resistor 30 are respectively connected with the base of transistor 2, the positive pole of Zener diode 1, the base of resistor 27 and transistor 3 Pole, the anode of Zener diode three, resistor three one connected, the positive pole of diode nine, the other end of resistor two seven, the emitter of triode two, the positive pole of Zener diode two and the source of switch tube four are connected, diode one zero The positive pole of the resistor 31, the emitter of the triode 3, the positive pole of the Zener diode 4 are connected to the source of the switch tube 5, and the source of the switch tube 4 is connected to the drain of the switch tube 5.

In the high power factor electronic ballast for controlling high-pressure gas discharge lamps of the present invention, the lamp starting point circuit is composed of diodes three, diodes four, diodes five, diodes seven, resistors one three, resistor one four, resistor one seven, Capacitor 13, capacitor 16, capacitor 21, capacitor 22, capacitor 23 and inductor 4; the anodes of diode 3 and diode 4 are connected to the output of the voltage stabilizing module of the auxiliary power supply, diode 3 and resistor 14, diode Five and resistor one and seven connected in parallel with capacitor one and six are connected in series, diode four is connected in series with resistor one and three, capacitor one and three is connected between the cathode of diode four and diode five, and the cathode of diode five is connected to the pulse width of the DC-AC inverter circuit The "1IN-" terminal of the adjustment controller is connected, the cathode of diode seven is connected to the cathode of diode four, the anode of diode seven is connected to the drain of switch tube three of the DC-AC inverter circuit, and one end of inductor four is connected to the DC-AC The drain of the switching tube five of the inverter circuit is connected to filter noise through the capacitor two and three, and the other end is connected in series with the capacitor two and two to form a series resonant circuit.

In the high power factor electronic ballast for controlling high-pressure gas discharge lamps of the present utility model, the auxiliary power supply is composed of the secondary coil 32 and the secondary coil 33 of the pulse transformer 1, a voltage stabilizing module, a half-wave rectifier diode, Bridge full-wave rectifier, resistor five, capacitor five, capacitor six and capacitor seven, among them, secondary coil three, half-wave rectifier diode and capacitor seven form a half-wave rectifier circuit, secondary coil three-two, bridge full-wave The rectifier and capacitor six form a bridge full-wave rectifier circuit, and its output is connected to the input terminal of the voltage stabilizing module through resistor five. And the soft start-signal processing circuit provides the required partial DC power; the output of the half-wave rectification circuit and the PFC integrated circuit of the active power factor adjustment control circuit provide DC power.

In the high power factor electronic ballast for controlling high-pressure gas discharge lamps of the present utility model, the soft start-signal processing circuit consists of triode one, diode three, resistor one and four, capacitor one and four, diode five and resistor two in series Composed of eight, the negative terminal of capacitor 14 is grounded, the positive pole of diode 3 is connected to the output terminal of the voltage stabilizing module of the auxiliary power supply, the collector of transistor 1 and the positive pole of diode 5 are connected between resistor 14 and capacitor 14 , the emitter of transistor 1 is grounded, resistor 28 is connected between the base of transistor 1 and the gate of the DC-AC inverter circuit, the cathode of diode 5 is connected to the pulse width adjustment controller of the DC-AC inverter circuit "1IN-" end connected.

In the high power factor electronic ballast for controlling high-pressure gas discharge lamps of the present utility model, the abnormal protection processing circuit is composed of six diodes, eight diodes, one five resistors, one six resistors, one eight resistors, one five capacitors, and two capacitors. 1, resistor 15 is connected in series with resistor 16 and connected in parallel with capacitor 15, one end of capacitor 21 is grounded, and its other end is connected in series with resistor 18, diode 8, resistor 15 and diode 6 in sequence, and the negative pole of diode 6 is connected with The "1IN-" terminal of the pulse width adjustment controller of the DC-AC inverter circuit is connected.

In the high power factor electronic ballast for controlling high-pressure gas discharge lamps of the present invention, the lamp resonance elimination circuit is composed of resistor 1, resistor 2, and capacitor 24, and one end of capacitor 24 is connected to resistor 1 and resistor in series. Between the two, the other end is connected to the RT end of the pulse width adjustment controller of the DC-AC inverter circuit.

The advantages of the high power factor electronic ballast for controlling high-pressure gas discharge lamps of the present invention are: the electronic ballast has a power factor of ≥0.99; the illuminance of the light source is stable and balanced, the application range of the external voltage is wide, and the energy consumption is small , High lighting quality, long service life and easy maintenance.

Description of drawings

Fig. 1 is a block diagram of the electronic ballast of the present invention;

Fig. 2 is a circuit diagram of the electronic ballast.

Detailed ways

The high power factor electronic ballast for controlling high-pressure gas discharge lamps of the present invention will be further described in conjunction with the embodiments below.

See Figure 2.

The high power factor electronic ballast for controlling high-pressure gas discharge lamps in this embodiment includes an electromagnetic interference signal suppression-blocking passive filter 1 composed of a group of inductors and capacitors and a full-wave bridge rectifier circuit connected thereto 2. Electromagnetic interference signal suppression-blocking passive filter 1 is used to suppress-block high-frequency crosstalk signals between external power and circuits.

The difference from the usual full-wave bridge rectification output filtering method is that in the PFC (Power Factor Corrector) circuit, the filter capacitor behind the full-wave bridge rectification is moved to the output end of the entire circuit, because the energy storage inductor L31 The front part of the input terminal needs to maintain a sinusoidal waveform.

The electronic ballast described in this embodiment also includes the following circuit, the switch tube used is a metal-oxide semiconductor field effect transistor, that is, a MOSFET (Metal Oxide Ssemiconductor type Field Effect Transistor) switch tube, and the switching frequency is between 30KHz-300KHz between.

Active power factor adjustment control circuit 3 is composed of PFC integrated circuit IC2, switch tube one Q1, diode one D1, energy storage inductor L31, continuous energy-smoothing capacitor C12, resistor three R3, resistor four R4, resistor six R6, resistor Seven R7, resistor eight R8, resistor nine R9, resistor one zero R10, resistor one one R11, resistor one two R12, resistor three three R33, capacitor two five C25, capacitor eight C8, capacitor nine C9, capacitor one zero C10, capacitor One by one C11 is composed; the input end of the energy storage inductance L31 is connected with the output end of the full-wave bridge rectifier circuit 2 and the resistance three R3 connected in series with the resistance four R4, and the capacitance two five C25 of the other end grounded is connected in parallel and connected with the resistance four R4 On the "MULT" pin of the PFC integrated circuit IC2, the output terminal of the energy storage inductor L31 is connected to the positive pole of the diode-D1 and the drain of the switch tube-Q1 connected in series with the resistor-R11, and the negative pole of the diode-D1 is connected to the resistor 33 The positive pole of R33, continuous energy-smoothing capacitor C12 is connected to the drain of the switching tube Q4 of DC-AC inverter circuit 4, the other end of resistor three three R33 is connected in series with resistor one two R12 connected in parallel with capacitor one one C11, The gate of the switching tube Q1 is connected to one end of the resistor R10 and the parallel capacitor C10 and resistor R8, and the other end of the parallel capacitor C10 and resistor R8 is connected to the GD pin of the PFC integrated circuit IC2. The other end of resistance one zero R10, resistance one one R11, resistance one two R12, capacitor one one C11 and continuous energy-smoothing capacitor C12 is grounded, and the other end of one end grounded capacitor eight C8 and capacitor nine C9 is connected to the PFC integrated circuit respectively The "COMP" of IC2 is connected to the CS pin, the resistor 9 R9 is connected between the "CS pin" of the PFC integrated circuit IC2 and the source of the switch tube Q1, and the secondary coil of the pulse transformer of the auxiliary power supply 6-B1 is 33 L33 The output of the resistor 6 is connected to the "ZCD" pin of the PFC integrated circuit IC2 through the resistor 6 R6, the cathode of the diode 2 D2 of the auxiliary power supply 6 is connected to the Vcc pin of the PFC integrated circuit IC2 and the resistor 7 R7, and the other end of the resistor 7 R7 is connected to the diode The positive pole of two D2 is connected.The operating principle of this circuit is briefly described as follows: the PFC integrated circuit IC2 of the present embodiment has PFC function, selects L6561 for use, and Q1 selects IRFP450 for use; Wherein, resistance one or two R12, resistance three three R33, electric capacity eight C8, Capacitor---C11 cooperates with other resistors, capacitors and the internal circuit of PFC integrated circuit IC2 to complete the voltage regulation and overvoltage protection function of the DC output voltage of this part of the circuit; the zero current detection signal required by the ZCD end of PFC integrated circuit IC2 is obtained by The secondary coil L33 of the pulse transformer 1 B1 of the auxiliary power supply 6 is directly led out through the resistor 6 R6 without rectification; among the two current comparison signals required by the PFC integrated circuit IC2, one is connected with the resistor 3 R3 and the resistor 4 R4 The point is introduced to the MULT input terminal of the internal current multiplier of the PFC integrated circuit IC2, and the capacitor 25 C25 is used to eliminate the noise of the circuit; the other way is taken from the resistor R11 and connected to the CS current detection input of the PFC integrated circuit IC2 through the resistor 9 R9 terminal, the function of the internal multiplier of the PFC integrated circuit IC2 is to monitor and force the sinusoidalization of the current and stabilize the output voltage; in this part of the circuit, the energy storage inductor L31 is the primary coil of the pulse transformer B1 of the auxiliary power supply 6 , the energy storage inductance L31 and the switching tube-Q1 work together to play the role of a current distributor, when the switching tube-Q1 is saturated and turned on, the diode-D1 is cut off, and the energy storage inductor L31 is charged; when the switching tube-Q1 is turned off, Diode one D1 is turned on, and the energy storage inductor L31 releases the accumulated energy to the load. During the cut-off period of diode one D1, the energy required by the load is maintained by the continuous energy-smoothing capacitor C12; the switch tube one Q1 is turned on and off by the PFC The integrated circuit IC2 outputs GD terminal control, so that the current waveform passing through the energy storage inductor L31 is sinusoidal according to the sinusoidal waveform variation law of the AC line voltage, so as to achieve the purpose of making the power factor close to 1. Actual tests show that the power factor of the embodiment of the utility model is ≥0.99.

The DC-AC (direct current-alternating current) inverter circuit 4 in the present embodiment is composed of the pulse width adjustment controller IC3 of the integrated circuit, the switch tube two Q2 and the switch tube three Q3 of the low-power MOSFET, and the switch tube four of the high-power MOSFET. Q4, switch tube five Q5, triode one T1, triode two T2, triode three T3, transformer two B2 for pulse sensing isolation, transformer three B3, diode nine D9, diode one zero D10, Zener diode one DW1, stabilizer Diode 2 DW2, Diode 3 DW3, Diode 4 DW4, Resistor 17 R17, Resistor 19 R19, Resistor 20 R20, Resistor 21 R21, Resistor 22 R22, Resistor 23 R23, Resistor 24 R24, resistor 25 R25, resistor 26 R26, resistor 27 R27, resistor 29 R29, resistor 30 R30, resistor 31 R31, capacitor 16 C16, capacitor 17 C17, capacitor 18 C18, capacitor 19 Composed of C19, capacitor 20 C20, and capacitor 23 C23; wherein, the REF, OC, "1IN+" and "2IN-" pins of the pulse width adjustment controller IC3 are short-circuited and connected in series with resistor 21 R21 Zero R20 is connected, capacitor 17 C17, resistor 19 R19, capacitor 18 C18, resistor 22 R22 are respectively connected to CT, RT of pulse width adjustment controller IC3 and shorted C1, C2 pins, resistor 22 The other end of R22 is connected between the primary input ends of the transformer 2 B2 and the transformer 3 B3 connected in series with the Vcc terminal of the pulse width adjustment controller IC3, and the primary input ends of the transformer 2 B2 and the transformer 3 B3 are respectively connected with Capacitor 19 C19 and capacitor 20 C20, the output terminals E2 and E1 of the pulse width adjustment controller IC3 are respectively connected to the gates of the switch tube 2 Q2 and the switch tube 3 Q3, and the grids of the switch tube 2 Q2 and the switch tube 3 Q3 Resistors 23 R23, 24 R24 and 25 R25 are respectively connected to the source. The drains of switch tube 2 Q2 and switch tube 3 Q3 are respectively connected to the other primary ends of transformer 2 B2 and transformer 3 B3. Transformer The secondary two ends of two B2 and transformer three B3 are respectively connected with the cathode of resistor 25 R25, resistor 26 R26 and diode 9 D9 and the cathode of resistor 29 R29, resistor 30 R30 and diode 10 D10, and resistor 25 The other end of R25 and resistor 29 R29 is respectively connected with the collector of transistor 2 T2, the cathode of Zener diode 1 DW1 and Zener diode 2 DW2, and the collector of transistor 3 T3, Zener diode 3 DW3 and Zener diode 4 DW4 The other end of resistor 26 R26 and resistor 30 R30 are respectively connected to the base of transistor 2 T2, the positive pole of Zener diode 1 DW1, resistor 27 R27 and the base of transistor 3 T3, Zener diode 3 DW3 The positive pole of the resistor 31 R31 is connected, the positive pole of the diode 9 D9, the other end of the resistor 27 R27, the emitter of the triode 2 T2, the positive pole of the Zener diode 2 DW2 is connected with the source of the switch tube 4 Q4, and the diode 10 The anode of D10, the other end of resistor R31, the emitter of triode T3, the anode of Zener diode DW4 are connected to the source of switching tube Q5, and the source of switching tube Q4 is connected to the drain of switching tube Q5 pole connection. The pulse width adjustment controller IC3 can use the voltage-driven pulse width adjustment controller TL494. The working principle of this circuit is briefly described as follows: connected to the CT and RT pins of the pulse width adjustment controller IC3. Nine R19 produces the sawtooth wave self-excited oscillation by cooperating with the oscillator in the chip, the oscillation frequency f=1-R19C17, the present embodiment gets R19=10k, C19=1nF, f=100kHz, and this sawtooth wave is made by the circuit in the chip After a series of comparisons and logic processing, it is changed into two rectangular pulses with a frequency of 50kHz (f/2) and a phase difference of 180 degrees through the external pins C1 and C2 of the pulse width adjustment controller IC3 (co-emitter mode) or E1, E2 (emitter-following mode) output, in order to achieve the purpose of matching the input impedance of the subsequent stage, this embodiment adopts the emitter-following output mode, and the resistor 22 R22 is connected as the common collector bias resistor of the two output transistors in the chip. To the C1 and C2 pins of the pulse width adjustment controller IC3, the capacitor 18 C18 is used to eliminate circuit noise; the output of the pulse width adjustment controller IC3 works in a push-pull (push-pull) mode, the resistance 20 R20, the Two-one R21 voltage divider circuit presets the dead zone control voltage of the on-chip DTC off-time controller; switch tube two Q2 and switch tube three Q3 are used for shaping and inverting the output pulse of the previous stage to drive the power output part behind, Resistor 23 R23 and resistor 24 R24 are the input bias resistors of switch tube 2 Q2 and switch tube 3 Q3 respectively, capacitor 19 C19 and capacitor 20 C20 are used to improve the output of switch tube 2 Q2 and switch tube 3 Q3 Waveform; Resistor 25 R25, Resistor 26 R26, Resistor 27 R27, Diode 9 D9, Zener Diode 1 DW1, Zener Diode 2 DW2 form the working point bias circuit of transistor 2 T2 and switch tube 4 Q4, resistor 2 Nine R29, resistor three zero R30, resistor three one R31, diode one zero D10, Zener diode three DW3, Zener diode four DW4 form the working point bias circuit of triode three T3 and switch tube five Q5, triode two T2, triode Three T3 are used to accelerate the turn-off process of MOSFET power tube switch tube four Q4 and switch tube five Q5; during normal operation, switch tube four Q4 and switch tube five Q5 are alternately turned on or off to provide the load with the required power output; actual The test shows that the voltage of the external power supply can vary between 85-265 volts, and the output power to the lamp load is basically constant, thus ensuring a stable and balanced illumination of the light source; since the current frequency passing through the lamp load is as high as 50-75kHz, the luminous efficiency of the light source is very high. High, the high-pressure gas discharge lamp with a rated power of 250W has a lumen factor as high as 107% when the actual power consumption is only 228W.

The light starting point circuit 5 in the present embodiment is made up of diode three D3, diode four D4, diode five D5, diode seven D7, resistor one three R13, resistor one four R14, resistor one seven R17, capacitor one three C13, capacitor one six C16, capacitor 21 C21, capacitor 22 C22, capacitor 23 C23 and inductor 4 L4; the anodes of diode 3 D3 and diode 4 D4 are connected to the output of voltage stabilizing module IC1 of auxiliary power supply 6, diode 3 D3 and resistor 1 Four R14, diode five D5 and resistor one seven R17 connected in parallel with capacitor one six C16 are connected in series, diode four D4 is connected in series with resistor one three R13, capacitor one three C13 is connected between the cathodes of diode four D4 and diode five D5, diode five The negative pole of D5 is connected to the "1IN-" terminal of the pulse width adjustment controller IC3 of the DC-AC inverter circuit 4, the negative pole of the diode seven D7 is connected to the negative pole of the diode four D4, and the positive pole of the diode seven D7 is connected to the DC-AC inverter The drain of the switching tube 3 Q3 of the circuit 4 is connected, one end of the inductor 4 L4 is connected to the drain of the switching tube 5 Q5 of the DC-AC inverter circuit 4 and the noise is filtered through the capacitor 23 C23, and the other end is connected to the capacitor 22 C22 and capacitor C21 are connected in series to form a series resonant circuit. The working principle of the circuit is briefly described as follows: when the pulse width adjustment controller IC3 of the DC-AC inverter circuit 4 is powered on, the internal pulse width adjustment PWM circuit part starts to work after a delay of 0.5-5 seconds, and the delayed The time is given by resistor 17 R17 and capacitor 16 C16; when the circuit is working normally, the voltage on resistor 13 R13 is fixed as a constant by the working voltage provided by auxiliary power supply 6 and the voltage drop on diode 4 D4, through the diode The output feedback current increment of the rear stage of seven D7 is all bypassed by capacitor one three C13, which is used as the input of the internal error amplifier (E-A) of the pulse width adjustment controller IC3 of the DC-AC inverter circuit 4, that is, the "1IN-" terminal input Capacitor C23 is used to remove the harmful noise of the circuit at this place, capacitors C21, C22 and inductor L4 form an LC series resonant circuit, and the circuit provides thousands of volts of high-voltage starting pulses required for the breakdown ignition process of the high-pressure gas discharge lamp through series resonant mode , after the end of the breakdown ignition process, the circuit provides an appropriate working current according to the negative resistance characteristics of the lamp.

The auxiliary power supply 6 in this embodiment consists of the secondary coil 32 L32 and the secondary coil 33 L33 of the pulse transformer 1 B1, the voltage stabilizing module IC1, the half-wave rectifier diode D2, the bridge full-wave rectifier, the resistor 5 R5, Composed of capacitor five C5, capacitor six C6, and capacitor seven C7; among them, secondary coil three three L33, half-wave rectifier diode D2 and capacitor seven C7 form a half-wave rectifier circuit, secondary coil three two L32, bridge full-wave rectifier and Capacitor six C6 forms a bridge-type full-wave rectifier circuit, and its output is connected to the input terminal of voltage stabilizing module IC1 through resistor five R5, and the output of voltage stabilizing module IC1 is filtered by capacitor five C5, and is DC-AC inverter circuit 4, The lamp starting point circuit 5 and the soft start-signal processing circuit 7 provide the required partial DC power; the output of the half-wave rectifier circuit and the PFC integrated circuit IC2 of the active power factor adjustment control circuit 3 provide DC power. In this embodiment, the voltage stabilizing module IC1 is a three-terminal voltage stabilizing integrated block, and the bridge full-wave rectifier is also connected by four rectifying diodes. The output voltage of the half-wave rectifying circuit is 20V, and the output voltage of the full-wave rectifying circuit is 15V.

The soft start-signal processing circuit 7 in the present embodiment is made up of triode one T1, diode three D3, resistance one four R14 and electric capacity one four C14, diode five D5 and resistance two eighty R28 in series successively; The terminal is grounded, the anode of diode three D3 is connected to the output terminal of the voltage stabilizing module of auxiliary power supply 6, the collector of transistor one T1 and the positive pole of diode five D5 are connected between resistor one four R14 and capacitor one four C14, and the triode The emitter of a T1 is grounded, the resistor 28 R28 is connected between the base of the transistor 1 T1 and the grid of Q5 of the DC-AC inverter circuit 4, the negative pole of the diode 5 D5 is connected to the pulse of the DC-AC inverter circuit 4 Width adjustment controller IC3 "1IN-" end connected. The working principle of the circuit is briefly described as follows: under normal working conditions, the triode T1 is turned on, and the capacitor C14 is discharged; the soft start process of the circuit is: when the output pulse of the pulse width adjustment controller IC3 is turned off due to some abnormal situation Finally, transistor 1 T1 is cut off, capacitor 14 C14 is charged, and after the set delay time period is fully charged, diode 5 D5 is turned on, and an output processing signal is given to enable the pulse width adjustment controller IC3 to resume normal operation. The length of the delay time is determined by the values of the resistor 14 R14 and the capacitor 14 C14; the delay time of this embodiment is designed to be 300 seconds.

Abnormal protection processing circuit 8 in the present embodiment is made up of diode six D6, diode eight D8, resistor one five R15, resistor one six R16, resistor one eight R18, capacitor one five C15, capacitor two one C21; resistor one five R15 and Resistor 16 R16 is connected in series and capacitor 15 C15 in parallel, one end of capacitor 21 C21 is grounded, and the other end is connected in series with resistor 18 R18, diode 8 D8, resistor 15 R15 and diode 6 D6 in series, and the negative pole of diode 6 D6 It is connected with the "1IN-" terminal of the pulse width adjustment controller IC3 of the DC-AC inverter circuit 4. The working process of the abnormality protection processing circuit 8 is briefly described as follows: when the output terminal circuit is abnormal (such as lamp short circuit, open circuit, overcurrent, overheating, etc.) 18 R18, diode 8 D8, resistor 15 R15, diode 6 D6 feed back to the "1IN-" terminal of the pulse width adjustment controller IC3 of the DC-AC inverter circuit 4, that is, the E-A input terminal, thereby closing the pulse width adjustment control The output pulse of the device IC3, and then the circuit enters the cycle standby state of soft start->abnormal protection->soft start, so as to achieve the purpose of reliable protection device.

The lamp resonance elimination circuit 9 in this embodiment is composed of a resistor R1, a resistor R2, and a capacitor C24; one end of the capacitor C24 is connected between the resistor R1 and the resistor R2 in series, and the other end is connected to the resistor R2. The RT terminal of the pulse width adjustment controller IC3 of the DC-AC inverter circuit 4 is connected. The operating principle of the lamp resonance elimination circuit 9 is briefly described as follows: the 100 Hz sine wave signal obtained from the voltage-divided sampling terminal of the resistor 1 R1 and the resistor 2 R2 is injected into the pulse width adjustment control of the DC-AC inverter circuit 4 through the capacitor 24 C24 The RT terminal of IC3 makes the pulse frequency generated by the on-chip oscillator frequency generator change continuously within a certain range, so as to eliminate the acoustic resonance phenomenon generated inside the high-pressure gas discharge lamp. The actual test of this embodiment shows that the frequency changes continuously within 1-100 seconds and the range is between 50kHz-75kHz.

The parts of the present invention that have not been described in detail will undoubtedly be obvious to those skilled in the art, and thus need not be described.

Claims (9)

1, a kind of high power factor electronic ballast of controlling high-voltage gas discharging light, comprise: electromagnetic interference inhibition-blocking-up passive filter (1), the full-wave bridge rectifier circuit (2) that links to each other with electromagnetic interference inhibition-blocking-up passive filter (1) and be the transformer that core body is made with the magnetic material; It is characterized in that: described electric ballast also comprises following circuit: adjust control circuit (3) with the active power factor that full-wave bridge rectifier circuit (2) is connected successively; DC-AC inverter circuit (4) and lamp open dot circuit (5); adjust control circuit (3) with active power factor; DC-AC inverter circuit (4) and lamp open the auxiliary electric power supply (6) that dot circuit (5) connects; with DC-AC inverter circuit (4); lamp opens soft start-signal processing circuit (7) that dot circuit (5) links to each other with auxiliary electric power supply (6); open the abnormal protection treatment circuit (8) that dot circuit (5) is connected with DC-AC inverter circuit (4) and lamp, and eliminate circuit (9) with the lamp resonance that full-wave bridge rectifier circuit (2) links to each other with DC-AC inverter circuit (4).

2, the high power factor electronic ballast of control high-voltage gas discharging light according to claim 1 is characterized in that described magnetic material is the non-crystaline amorphous metal material, nanometer crystal alloy material or Ferrite Material.

3, the high power factor electronic ballast of control high-voltage gas discharging light according to claim 1 and 2, it is characterized in that described active power factor adjustment control circuit (3), by PFC integrated circuit (IC2), switching tube one (Q1), diode one (D1), energy storage inductor (L31), continuous energy-flat wave capacitor (C12), resistance three (R3), resistance four (R4), resistance six (R6), resistance seven (R7), resistance eight (R8), resistance nine (R9), resistance 1 (R10), resistance is (R11) one by one, resistance one or two (R12), resistance three or three (R33), electric capacity two or five (C25), electric capacity eight (C8), electric capacity nine (C9), electric capacity 1 (C10), electric capacity (C11) is one by one formed; The input of energy storage inductor (L31) is connected with the output of full-wave bridge rectifier circuit (2) and with the resistance three (R3) of resistance four (R4) series connection, the electric capacity two or five (C25) of other end ground connection is in parallel with resistance four (R4) and be connected in " MULT " pin of PFC integrated circuit (IC2), the positive pole of the output of energy storage inductor (L31) and diode one (D1) and with resistance one by one the drain electrode of (R11) switching tube one (Q1) of connecting link to each other, the negative pole of diode one (D1) and resistance three or three (R33), the drain electrode of the positive pole of continuous energy-flat wave capacitor (C12) and the switching tube four (Q4) of DC-AC inverter circuit (4) links to each other, the other end of resistance three or three (R33) and with electric capacity one by one (C11) parallel resistor one or two (R12) connect, the grid of switching tube one (Q1) and resistance 1 (R10) and electric capacity 1 (C10) in parallel, one end of resistance eight (R8) links to each other, electric capacity 1 (C10) in parallel, the other end of resistance eight (R8) is connected with the GD pin of PFC integrated circuit (IC2), resistance 1 (R10), resistance is (R11) one by one, resistance one or two (R12), electric capacity is the other end ground connection of (C11) and continuous energy-flat wave capacitor (C12) one by one, the electric capacity eight (C8) of one end ground connection is connected with the CS pin with " COMP " of PFC integrated circuit (IC2) respectively with the other end of electric capacity nine (C9), resistance nine (R9) is connected in PFC integrated circuit (IC2) " between the source electrode of CS pin and switching tube one (Q1); the output of the secondary coil three or three (L33) of the pulse transformer one (B1) of auxiliary electric power supply (6) is connected with " ZCD " pin of PFC integrated circuit (IC2) through resistance six (R6); the negative pole of the diode two (D2) of auxiliary electric power supply (6) is connected with the Vcc pin of PFC integrated circuit (IC2) and resistance seven (R7), and the other end of resistance seven (R7) links to each other with the positive pole of diode two (D2).

4, the high power factor electronic ballast of control high-voltage gas discharging light according to claim 3, it is characterized in that described DC-AC inverter circuit (4) is by pulsewidth adjustment controller (IC3), switching tube two (Q2), switching tube three (Q3), switching tube four (Q4), switching tube five (Q5), triode one (T1), triode two (T2), triode three (T3), transformer two (B2), transformer three (B3), diode nine (D9), diode 1 (D10), voltage stabilizing didoe one (DW1), voltage stabilizing didoe two (DW2), voltage stabilizing didoe three (DW3), voltage stabilizing didoe four (DW4), resistance one or seven (R17), resistance one or nine (R19), resistance 20 (R20), resistance 21 (R21), resistance two or two (R22), resistance two or three (R23), resistance two or four (R24), resistance two or five (R25), resistance two or six (R26), resistance two or seven (R27), resistance two or nine (R29), resistance 30 (R30), resistance 31 (R31), electric capacity one or six (C16), electric capacity one or seven (C17), electric capacity one or eight (C18), electric capacity one or nine (C19), electric capacity 20 (C20), electric capacity two or three (C23) is formed; Wherein, pulsewidth is adjusted the REF of controller (IC3), OC, " 1IN+ " and " 2IN-" pin link to each other by short circuit and with resistance 20 (R20) with resistance 21 (R21) series connection, electric capacity one or seven (C17), resistance one or nine (R19) and electric capacity one or eight (C18), resistance two or two (R22) is connected to the CT that pulsewidth is adjusted controller (IC3) respectively, the C1 of RT and short circuit, on the C2 pin, the other end of resistance two or two (R22) is connected between the primary input terminal of serial connection and transformer two (B2) that be connected with the Vcc end of pulsewidth adjustment controller (IC3) and transformer three (B3), the primary input terminal of transformer two (B2) and transformer three (B3) is connected to electric capacity one or nine (C19) and electric capacity 20 (C20) respectively, pulsewidth is adjusted the output E2 of controller (IC3), E1 links to each other with the grid of switching tube two (Q2) and switching tube three (Q3) respectively, be connected to resistance two or three (R23) between the grid of switching tube two (Q2) and switching tube three (Q3) and the source electrode respectively, resistance two or four (R24) and resistance two or five (R25), the drain electrode of switching tube two (Q2) and switching tube three (Q3) links to each other with the elementary other end of transformer two (B2) with transformer three (B3) respectively, the secondary two ends of transformer two (B2) and transformer three (B3) respectively with resistance two or five (R25), the negative pole of resistance two or six (R26) and diode nine (D9) and resistance two or nine (R29), the negative pole of resistance 30 (R30) and diode 1 (D10) connects, the other end of resistance two or five (R25) and resistance two or nine (R29) respectively with the collector electrode of triode two (T2), the collector electrode of the negative pole of voltage stabilizing didoe one (DW1) and voltage stabilizing didoe two (DW2) and triode three (T3), the negative pole of voltage stabilizing didoe three (DW3) and voltage stabilizing didoe four (DW4) links to each other, the other end of resistance two or six (R26) and resistance 30 (R30) respectively with the base stage of triode two (T2), the positive pole of voltage stabilizing didoe one (DW1), the base stage of resistance two or seven (R27) and triode three (T3), the positive pole of voltage stabilizing didoe three (DW3), resistance 31 (R31) links to each other, the positive pole of diode nine (D9), the other end of resistance two or seven (R27), the emitter of triode two (T2), the positive pole of voltage stabilizing didoe two (DW2) links to each other with the source electrode of switching tube four (Q4), the positive pole of diode 1 (D10), the other end of resistance 31 (R31), the emitter of triode three (T3), the positive pole of voltage stabilizing didoe four (DW4) links to each other with the source electrode of switching tube five (Q5), and the source electrode of switching tube four (Q4) is connected with the drain electrode of switching tube five (Q5).

5, according to the high power factor electronic ballast of claim 1 or 2 or 4 described control high-voltage gas discharging lights, it is characterized in that described lamp opens dot circuit (5) by diode three (D3), diode four (D4), diode five (D5), diode seven (D7), resistance one or three (R13), resistance one or four (R14), resistance one or seven (R17), electric capacity one or three (C13), electric capacity one or six (C16), electric capacity 21 (C21), electric capacity two or two (C22), electric capacity two or three (C23) and inductance four (L4) are formed; The positive pole of diode three (D3) and diode four (D4) connects the output of the Voltage stabilizing module (IC1) of auxiliary electric power supply (6), diode three (D3) and resistance one or four (R14), diode five (D5) and connect with electric capacity one or six (C16) parallel resistor one or seven (R17), diode four (D4) is connected with resistance one or three (R13), electric capacity one or three (C13) is connected between the negative pole of diode four (D4) and diode five (D5), the negative pole of diode five (D5) is adjusted it " 1IN-" of controller (IC3) end with the pulsewidth of DC-AC inverter circuit (4) and is linked to each other, the negative pole of diode seven (D7) is connected with the negative pole of diode four (D4), the positive pole of diode seven (D7) links to each other with the drain electrode of the switching tube three (Q3) of DC-AC inverter circuit (4), one end of inductance four (L4) is connected with the drain electrode of the switching tube five (Q5) of DC-AC inverter circuit (4) and by electric capacity two or three (C23) filtering noise, the other end is connected with electric capacity two or two (C22) and electric capacity 21 (C21), constitutes series resonant tank.

6, the high power factor electronic ballast of control high-voltage gas discharging light according to claim 5, it is characterized in that secondary coil three two (L32) and the secondary coil three three (L33) of described auxiliary electric power supply (6) by pulse transformer one (B1), Voltage stabilizing module (IC1), halfwave rectifier diode (D2), bridge full wave rectifier, resistance five (R5), electric capacity five (C5), electric capacity six (C6) and electric capacity seven (C7) are formed, wherein, secondary coil three or three (L33), halfwave rectifier diode (D2) and electric capacity seven (C7) constitute half-wave rectifying circuit, secondary coil three or two (L32), bridge full wave rectifier and electric capacity six (C6) are formed full-wave bridge rectifier circuit, and its output links to each other through the input of resistance five (R5) with Voltage stabilizing module (IC1), the output of Voltage stabilizing module (IC1) is by electric capacity five (C5) filtering, and is DC-AC inverter circuit (4), lamp opens dot circuit (5) and soft start-signal processing circuit (7) provides required part DC power supply; The PFC integrated circuit (IC2) that the output of described half-wave rectifying circuit and active power factor are adjusted control circuit (3) provides DC power supply.

7, according to claim 1 or 2 or the high power factor electronic ballast of 4 or 6 described control high-voltage gas discharging lights, it is characterized in that described soft start-signal processing circuit (7) is by triode one (T1), diode in series three (D3) successively, resistance one or four (R14) and electric capacity one or four (C14), diode five (D5) and resistance sixteen (R28) are formed, the negativing ending grounding of electric capacity one or four (C14), the positive pole of diode three (D3) links to each other with the output of the Voltage stabilizing module (IC1) of auxiliary electric power supply (6), the positive pole of the collector electrode of triode one (T1) and diode five (D5) is with being connected between resistance one or four (R14) and the electric capacity one or four (C14), the grounded emitter of triode one (T1), resistance sixteen (R28) is connected between the grid of (Q5) of the base stage of triode one (T1) and DC-AC inverter circuit (4), and the negative pole of diode five (D5) links to each other with " 1IN-" end that the pulsewidth of DC-AC inverter circuit (4) is adjusted controller (IC3).

8; the high power factor electronic ballast of control high-voltage gas discharging light according to claim 7; it is characterized in that described abnormal protection treatment circuit (8) is by diode six (D6); diode eight (D8); the resistance First Five-Year Plan (R15); resistance one or six (R16); resistance one or eight (R18); the electric capacity First Five-Year Plan (C15); electric capacity 21 (C21) is formed; the resistance First Five-Year Plan (R15) connects with resistance one or six (R16) also and (C15) parallel connection of electric capacity First Five-Year Plan; one end ground connection of electric capacity 21 (C21); its other end successively with resistance one or eight (R18); diode eight (D8); resistance First Five-Year Plan (R15) and diode six (D6) series connection, the negative pole of diode six (D6) are adjusted it " 1IN-" of controller (IC3) end with the pulsewidth of DC-AC inverter circuit (4) and are linked to each other.

9, according to claim 1 or 2 or 4 or the high power factor electronic ballast of 6 or 8 described control high-voltage gas discharging lights, it is characterized in that described lamp resonance elimination circuit (9) is by resistance one (R1), resistance two (R2), electric capacity two or four (C24) is formed, one end of electric capacity two or four (C24) is connected between the resistance one (R1) and resistance two (R2) of series connection, and its other end links to each other with the RT end that the pulsewidth of DC-AC inverter circuit (4) is adjusted controller (IC3).

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