CN201393341Y - Split ballast-driven multi-fluorescent lamp system - Google Patents

Abstract

The utility model provides a split ballast-driven multi-fluorescent lamp system. A resistor R1 of a filter rectifier circuit and a capacitor C1 are connected in parallel, then connected to two ends of L1 and further connected to two AC ends of a rectifier bridge DQ1 after filtering, a capacitor C5 is used for connecting two output ends of the rectifier bridge, the capacitors C8 and C9 of a power correction circuit are connected to an integrated circuit U1 in parallel, a pin 2 of the U1 is grounded through the resistor R6, C6 and C7 are connected in series, then two ends are connected with the pin 1 and the pin 2, and R17 is connected with a diode D1 in parallel. Voltage of 300V of a dimming circuit is added on a VCC pin of the integrated circuit U2 through the R33, the resistor R34 is connected with the pin 16 of the U2 and a field effect transistor M2, the R41 is connected with the pin 11 of U2 and the M3, a source of M2 is connected with a drain of M3, a power supply of a single-chip microcomputer control circuit is connected with the resistor R54 in series and then connected to the end 1 of an optocoupler U15, the end 2 of the U15 is connected to the end PB5 of a single-chip microcomputer U8, voltage of 15V is added on the end 3 of the U15, and the end 3 is connected with a relay through the resistor R56. The split ballast-driven multi-fluorescent lamp system has the advantages of convenient installation, low heat productivity and long service life.

Description

The many fluorescent lamp systems of split type ballast driven

Technical field:

The utility model relates to family, public emergency lighting technical field, refers in particular to the many fluorescent lamp systems of a kind of split type ballast driven.

Background technology:

Mostly volume is excessive for the ballast of common integral type ballast driven fluorescent lamp system, dress does not advance light fixture, if for the integral type ballast is put into light fixture, can only reduce the volume of ballast, its consequence is that radiating efficiency is low because surface area is too little, cause the ballast internal temperature to exceed the serviceability temperature of electronic device, thereby seriously shorten the useful life of ballast, produce a large amount of electronic wastes simultaneously, be unfavorable for environmental protection.

Summary of the invention:

The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of being convenient to install, and caloric value is low, the many fluorescent lamp systems of split type ballast driven of long service life.

For realizing above purpose, the novel technical scheme that provides of this use is: the many fluorescent lamp systems of split type ballast driven, it is characterized in that: it is mainly by filter rectifier, the active power correcting circuit, light adjusting circuit, single chip machine controlling circuit is formed, the two ends that the resistance R 1 shunt capacitance C1 of filter rectifier receives L1, the EMI filter circuit is formed at resistance R 2 and C2 and the two ends in addition of receiving L1.Receive the AC two ends of rectifier bridge DQ1 after the filtering again, with the output two ends of a capacitor C 5 connection rectifier bridges, output negativing ending grounding, anode output 300V voltage; The capacitor C 8 of power factor correction circuit and C9 also are connected to 6 pin and 8 pin of integrated circuit U1,2 pin are by resistance R 6 ground connection, C6 and R7 series connection again and connect behind the C7 two and terminate to 1 and 2 pin, 3 pin are by R12 and C11 ground connection in parallel, R17 and diode D1 parallel connection, the N utmost point is received 7 pin of U1.Integrated circuit L6561 is U1 and T1, resistance, and electric capacity, M1, elements such as diode have formed active power and have proofreaied and correct pre-converter circuit; The voltage 300V of light adjusting circuit is 13 pin by the VCC pin that R33 is added to integrated circuit U2, resistance R 34 connects 16 pin of U2 and the grid of field effect transistor M2, R41 connects 11 pin of U2 and the grid of M3, the source electrode of M2 links to each other with the drain electrode of M3, form half-bridge circuit, control signal transmits into 4 pin of U2 by R35, and by terminals J6, J7 connects fluorescent lamp; Single chip machine controlling circuit drives powering on and power down of relay control ballast, light-coupled isolation, one resistance R 54 of 5V power supply string is received 1 end of photoelectricity coupling U15,2 of U15 terminates to the PB5 end of single-chip microcomputer U8,3 ends at U15 add 15V voltage, and 3 ends connect a relay by resistance R 56.

After the utility model adopted such scheme, control circuit and light adjusting circuit separated, because ballast is away from fluorescent tube, can not be subjected to the thermal impact of fluorescent tube, electronic component is worked just reliable more under the low more condition of temperature, and the power factor (PF) height is so need not add APFC circuit corrected power again on each lamp.But also can preheating, increase the service life.Owing to above reason makes split type many fluorescent lamps reduce the use of electronic device, reduced volume and finished product, working temperature is low, and the electronic devices and components life-span reduces the generation of electronic waste than common energy-saving lamp height, this just environmental protection, the environmental protection of energy-conservation palpus is just with practical value.

Description of drawings:

Fig. 1, Fig. 2, Fig. 3, be electric theory structure schematic diagram of the present utility model.

Embodiment:

Below in conjunction with the utility model preferred embodiment and accompanying drawing the utility model is further described:

The circuit system of the many fluorescent lamps of split type ballast driven of the present invention, it is mainly by filter rectifier, the active power correcting circuit, light adjusting circuit, single chip machine controlling circuit is formed, and specifically connects following (with reference to figure 1, Fig. 2, Fig. 3):

The ballast portion:

1, the two ends that filter rectifier resistance R 1 shunt capacitance C1 receives L1, the EMI filter circuit is formed at resistance R 2 and C2 and the two ends in addition of receiving L1.Receive the AC two ends of rectifier bridge DQ1 after the filtering again, with the output two ends of a capacitor C 5 connection rectifier bridges, output negativing ending grounding, anode output 300V voltage.

2, power factor correction circuit (PFC) capacitor C 8 and C9 also are connected to 6 pin and 8 pin of integrated circuit U1, and 2 pin are by resistance R 6 ground connection, C6 and R7 series connection again and connect behind the C7 two and terminate to 1 and 2 pin, 3 pin are by R12 and C11 ground connection in parallel, R17 and diode D1 parallel connection, and the N utmost point is received 7 pin of U1.Integrated circuit L6561 is U1 and T1, resistance, and electric capacity, M1, elements such as diode have formed active power and have proofreaied and correct pre-converter circuit.

3, coupling circuit Single-chip Controlling signal is from i.e. 1, the 2 pin input of diode end of photoelectrical coupler, and the voltage of a 15V is added to 3 ends by resistance R 23, and 3 ends are sent control signal through resistance R 29,4 end ground connection, and signal output part and 4 ends are received in R30 and C18 parallel connection.

4, light adjusting circuit voltage 300V is 13 pin by the VCC pin that R33 is added to integrated circuit U2, resistance R 34 connects 16 pin of U2 and the grid of field effect transistor M2, R41 connects 11 pin of U2 and the grid of M3, the source electrode of M2 links to each other with the drain electrode of M3, form half-bridge circuit, control signal transmits into 4 pin of U2 by R35.Integrated circuit IR21592 is U2 and resistance, electric capacity, and peripheral cells such as field effect transistor have been formed light adjusting circuit.By terminals J6, J7 connects fluorescent lamp.

Single-chip Controlling:

1, power unit capacitor C 31 is connected in series R52 again with resistance R 51 parallel connections,, the other end of R52 is received the AC end of rectifier bridge U3, and another AC end links to each other with power supply, diode D11, electrochemical capacitor C32,33 3 parallel connections of capacitor C, the N utmost point of diode D11 and the positive pole of C32 are connected to the positive voltage output end V+ of rectifier bridge U3 and the input of three terminal regulator U4, the P utmost point of D11 and the negative pole of C32 are connected to the V-end of U3 and the ground end of U4, and the output of U3 and ground end are connected in series capacitor C 34 and C35 again.Power unit adopts the capacitance-resistance power mode, the working power 40MA of rectifier bridge output, and voltage 15V obtains 5V voltage through 7805.Powering on and power down of Micro Controller Unit (MCU) driving relay control ballast.Light-coupled isolation.Resistance R 54 of a 5V power supply string is received 1 end of photoelectricity coupling U15, and 2 of U15 terminates to the PB5 end of single-chip microcomputer U8, adds 15V voltage at 3 ends of U15, and 3 ends connect a relay by resistance R 56.

2, infrared receiving circuit adopts the integrated infrared receiving terminal of three ends to receive infrared signal.The single-chip microcomputer internal processes is finished infrared decoding.2 end ground connection, 3 termination powers, 1 end is an output, adds a pull-up resistor R60 and increases fan-out capability, 1 end is received 32 pin of U8 then.

3, circuit takes place and by resistance R 63 32 pin (pwm signal output) of U8 is linked to each other with the positive input of amplifier U9 in PWM, and VCC connects with two substitutional resistance R61 and R62 after the dividing potential drop, connects the reverse input end of amplifier U9 at the dividing potential drop place.This part circuit provides to ballast and is used for light modulation.Circuit is the comparator that is barricaded as by amplifier, and reference voltage is 2.5 voltages that 5V voltage resistance dividing potential drop obtains.The pwm signal that another road comparison signal produces from single-chip microcomputer.

Operation principle:

The PFC booster converter provides line power factor that approaches 1 and the DC bus voltage VBUS that hangs down total harmonic current distortions THD and 400V for ballast circuit.Connect J1 in input, after the J2 supply line, rectifier bridge output DC pulsating voltage 300V passes through R33) give on the VCC pin of U2 and power, U2 starts, VCO starting of oscillation in the U2, half-bridge driver is started working.As long as half-bridge produces output, the charge pump circuit that C26, D6R24 and D7 form is the VCC pin power supply of U2.Half-bridge output high-frequency signal is through C26 rectification and C8, and C9 is filtered into 8 pins (VCC) power supply of U1, makes the U1 startup and pfc converter is started working.The voltage divider of being made up of R32 and R31 on the U2 pin 1 is as the line voltage distribution that detects through full-wave rectification.Have only when the voltage on the VCC pin surpasses voltage on turn-on threshold voltage and the VDC pin greater than 5.1V, U2 could start and enter preheating mode.At preheating mode, U2 pin 2 inner VCO vibrate on highest frequency, and half-bridge is exported the duty factor with 50%, and the Dead Time inner setting between the driving output on HO pin and the LO pin is 2 μ s, thereby avoids M2 and M3 " to lead directly to ".Determine by U2 pin 3 external capacitor C23 warm-up time.When the voltage on the C23 during greater than 5.1V, after warm-up phase finished, U2 entered trigger mode.Under trigger mode, operating frequency is offset to low-limit frequency fMIN from pre-heat frequency.Lowest operating frequency is set by U2 pin 7 external resistor R39.In frequency linearity reduction process, when reaching certain frequency, with lamp tube starting.In case lamp is lighted success, U2 then enters operational mode, if failure, IC2 then enters the error protection pattern.IR21592 has 1 dimming interface, and promptly pin 4.U2 pin 4 allows the dc voltage input of 0.5V～5V, carries out the control of analog modulation power.The voltage of 5V moves (maximum lamp power) corresponding to minimum phase.Dimming interface output is the voltage of U2 pin MIN, and this voltage is compared with voltage VCT on the IC2 internal timing capacitor (CT), and the generation frequency is the digital interface phase place independently.CT determines the ON time of IC2 output gate drivers (HO and LO) from the charging interval of 1V～5V.May be in load current corresponding to-180 ° phase shift.For 0 °～90 ° dimming scope, utilize external resistor on pin MIN and the pin MAX with the voltage limit on the IC2 pin MIN between 1V～3V.Corresponding to the input of 5V on the DIM pin, RMAX decision minimum phase shift is with reference to (maximum lamp power).RMIN is provided with maximum phase shift (minimum lamp power), corresponding to the light modulation input of 0.5V.M3 source resistance device R44 sensing half-bridge current.As long as the voltage on the U2 pin CS surpasses 1.6V, then circuit enters the error protection pattern.

When lamp broke down, U2 closed.U2 pin 8 non-essential resistance R37 are provided with benchmark peak value preheat curent.

The embodiment of the above is preferred embodiment of the present utility model only, is not to limit practical range of the present utility model with this, so the equivalence that all shapes according to the utility model, structure and principle are done changes, all should be covered by in the protection range of the present utility model.

Claims (1)

1, the many fluorescent lamp systems of split type ballast driven, it is characterized in that: it is mainly by filter rectifier, the active power correcting circuit, light adjusting circuit, single chip machine controlling circuit is formed, it is characterized in that: the two ends that the resistance R 1 shunt capacitance C1 of filter rectifier receives L1, the EMI filter circuit is formed at resistance R 2 and C2 and the two ends in addition of receiving L1.Receive the AC two ends of rectifier bridge DQ1 after the filtering again, with the output two ends of a capacitor C 5 connection rectifier bridges, output negativing ending grounding, anode output 300V voltage; The capacitor C 8 of power factor correction circuit and C9 also are connected to 6 pin and 8 pin of integrated circuit U1,2 pin are by resistance R 6 ground connection, C6 and R7 series connection again and connect behind the C7 two and terminate to 1 and 2 pin, 3 pin are by R12 and C11 ground connection in parallel, R17 and diode D1 parallel connection, the N utmost point is received 7 pin of U1; Integrated circuit L6561 is U1 and T1, resistance, and electric capacity, M1, elements such as diode have formed active power and have proofreaied and correct pre-converter circuit; The voltage 300V of light adjusting circuit is 13 pin by the VCC pin that R33 is added to integrated circuit U2, resistance R 34 connects 16 pin of U2 and the grid of field effect transistor M2, R41 connects 11 pin of U2 and the grid of M3, the source electrode of M2 links to each other with the drain electrode of M3, form half-bridge circuit, control signal transmits into 4 pin of U2 by R35, and by terminals J6, J7 connects fluorescent lamp; Single chip machine controlling circuit drives powering on and power down of relay control ballast, light-coupled isolation, one resistance R 54 of 5V power supply string is received 1 end of photoelectricity coupling U15,2 of U15 terminates to the PB5 end of single-chip microcomputer U8,3 ends at U15 add 15V voltage, and 3 ends connect a relay by resistance R 56.

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