CN101772250A - Dimmable electronic ballast - Google Patents

Dimmable electronic ballast Download PDF

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Publication number
CN101772250A
CN101772250A CN201010111438A CN201010111438A CN101772250A CN 101772250 A CN101772250 A CN 101772250A CN 201010111438 A CN201010111438 A CN 201010111438A CN 201010111438 A CN201010111438 A CN 201010111438A CN 101772250 A CN101772250 A CN 101772250A
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resistance
circuit
pin
diode
capacitor
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CN201010111438A
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CN101772250B (en
Inventor
周明杰
李英伟
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Oceans King Lighting Science and Technology Co Ltd
Shenzhen Oceans King Lighting Engineering Co Ltd
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Oceans King Lighting Science and Technology Co Ltd
Shenzhen Oceans King Lighting Engineering Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Abstract

The invention provides a dimmable electronic ballast, which is suitable for the field of fluorescent lighting. The electronic ballast of the invention comprises a filter circuit, a rectifying circuit, a power-factor correction circuit, a control circuit, a charge pump supply circuit, a driving circuit, an output stage circuit, a current sampling circuit, an abnormal protection circuit and a CAN communication circuit, wherein the CAN communication circuit is connected with the control end of the control circuit. The dimmable electronic ballast provided by the invention carries out intelligent control on the load of a fluorescent tube through the CAN communication circuit, improves the real-time performance of remote control, and achieves farther control distance and higher communication rate.

Description

A kind of electric ballast of tunable optical
Technical field
The invention belongs to the fluorescent lighting field, relate in particular to a kind of electric ballast of tunable optical.
Background technology
The electric ballast of prior art support communication light modulation mainly is that (wherein DALI is meant digital addressable light interface to digital address for DigitalAddressable Lighting Interface, DALI) dimming electronic ballast; The DALI dimming electronic ballast is connected into the DALI bus by the DALI interface circuit, realizes long-range control to the DALI ballast by DALI communication, realizes the remote switch circuit for lamp, the adjusting of lamplight brightness, the feedback of lamp operating state.
Because the limitation of DALI bus, the major defect that the DALI dimming electronic ballast exists is: (1) can only connect 64 DALI electric ballasts, negligible amounts at most on the DALI bus; (2) DALI bus communication distance 300M farthest, communication speed 1.2Kbps, communication distance is short, and traffic rate is slow, and the control area is little.If in building, a building, the DALI bus cooperates the DALI dimming electronic ballast can finish Control on Communication, but at subway, the tunnel, strip control areas such as bridge are long then several kilometers, or regional building networking control, cannot finish Based Intelligent Control once cover DALI system, needing increases gateway, is integrated into higher level system, for example is connected to the EIB system.Good communication performance by EIB reaches farther control range, needs two cover systems to finish in a control system like this, and brought new problem as follows: two cover systems have increased great amount of cost undoubtedly; Need the interface conversion gateway also to need to increase extra cost between two cover systems; Inconvenience is safeguarded in two cover systems debugging inconvenience; After layout is reserved, change control layout inconvenience; And when command range was far away, the error rate uprised, the antijamming capability variation; (3) real-time is poor, because the DALI traffic rate is slow, causes control to exist and postpones, and is insensitive, can not in time collect the illuminator job information in demanding place, and can there be late effect in ballast.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of electric ballast of tunable optical, and it is short to be intended to solve existing DALI dimming electronic ballast command range, and traffic rate is slow, the problem of real-time difference.
The embodiment of the invention is achieved in that a kind of electric ballast of tunable optical, and it comprises filter circuit, rectification circuit and the circuit of power factor correction that connects in turn; Also comprise: control circuit; The charge pump power supply circuits, its first input end is connected to the output of described circuit of power factor correction; Drive circuit, its first power input is connected to the output of described circuit of power factor correction, the second source input of described drive circuit is connected to the output of described charge pump power supply circuits, and the control end of described drive circuit is connected to the PWM control output end of described control circuit; Output-stage circuit, its input is connected to the output of described drive circuit, and first output of described output-stage circuit is connected to the input of tube load, and second output of described output-stage circuit is connected to second input of described charge pump power supply circuits; Current sampling circuit, its input is connected to the input of tube load, and the output of current sampling circuit is connected to the feedback input end of control circuit; Abnormity protection circuit, its input is connected to the input of tube load, and the output of abnormity protection circuit is connected to the protection control input end of control circuit; And the CAN communicating circuit that is connected the control end of described control circuit.
The electric ballast of tunable optical provided by the invention carries out Based Intelligent Control by the CAN communicating circuit to tube load, has improved the real-time of Long-distance Control, has reached farther command range, faster traffic rate.
Description of drawings
Fig. 1 is the modular structure schematic diagram of the electric ballast of the tunable optical that provides of the embodiment of the invention;
Fig. 2 is the physical circuit figure of drive circuit, charge pump power supply circuits and control circuit in the electric ballast of the tunable optical that provides of the embodiment of the invention;
Fig. 3 is the physical circuit figure of the CAN communicating circuit in the electric ballast of the tunable optical that provides of the embodiment of the invention;
Fig. 4 is the physical circuit figure of output-stage circuit, abnormity protection circuit, current sampling circuit and testing circuit in the electric ballast of the tunable optical that provides of the embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
The electric ballast of tunable optical provided by the invention carries out Based Intelligent Control by the CAN communicating circuit to tube load, has improved the real-time of Long-distance Control, has reached farther command range, faster traffic rate.
Fig. 1 shows the modular structure schematic diagram of the electric ballast of the tunable optical that the embodiment of the invention provides, and for convenience of explanation, only shows the part relevant with the embodiment of the invention, and details are as follows.
The electric ballast of tunable optical, it comprises: filter circuit 11, rectification circuit 12, circuit of power factor correction 13, charge pump power supply circuits 14, drive circuit 15, output-stage circuit 16, current sampling circuit 19, control circuit 18, abnormity protection circuit 20 and CAN communicating circuit 21; Wherein, filter circuit 11, rectification circuit 12 and circuit of power factor correction 13 connect in turn, the input of filter circuit 11 connects external power supply, filter circuit 11 carries out the 220V alternating voltage of input to export after the filtering, after rectification circuit 12 rectifications processing, adjust the direct voltage of back output 400V again through circuit of power factor correction 13; The first input end of charge pump power supply circuits 14 is connected to the output of circuit of power factor correction 13; First power input of drive circuit 15 is connected to the output of circuit of power factor correction 13, the second source input of drive circuit 15 is connected to the output of charge pump power supply circuits 14, and the control end of drive circuit 15 is connected to the PWM control output end of control circuit 18; The input of output-stage circuit 16 is connected to the output of drive circuit 15, and first output of output-stage circuit 16 is connected to the input of tube load 22, and second output of output-stage circuit 16 is connected to second input of charge pump power supply circuits 14; The input of current sampling circuit 19 is connected to the input of tube load 22, and the output of current sampling circuit 19 is connected to the feedback input end of control circuit 18; The input of abnormity protection circuit 20 is connected to the input of tube load 22, and the output of abnormity protection circuit 20 is connected to the protection control input end of control circuit 18; CAN communicating circuit 21 is connected the control end of control circuit 18.
The CAN communication network is a kind of of field bus technique, is that a kind of framework is open, the network communication protocol of broadcast type, is called the controller local area network fieldbus.Advantages such as the CAN communication is with low cost, real-time communication good, error correcting capability is strong and extensively being adopted by systems such as auto industry, power system transformer substation automation, intelligent buildings; The CAN communication can be a peering structure, i.e. many host works mode, on the network any one node can be at any time on one's own initiative on network other node send information, be regardless of the principal and subordinate, communication modes is flexible.The non-destructive arbitration technique is adopted in the CAN communication, and when two nodes transmitted data simultaneously on network, the node that priority is low initiatively stopped data and sends, and the high node of priority can continue to transmit data insusceptibly, has effectively avoided bus collision; Short frame structure is adopted in the CAN communication, and the effective word joint number of each frame is 8, and data transmission period is short, and the probability that is disturbed is low, and the time that resends is short; Every frame data of CAN communication all have CRC effect and other error detection measures, have guaranteed the high reliability of transfer of data, are suitable for using in high-interference environment; The CAN node has the function of automatic pass closed bus under wrong serious situation, cut off getting in touch of it and bus, so that other operation is unaffected on the bus; CAN can be point-to-point, some multiple spot and overall situation broadcasting centralized system are transmitted and accept data; The direct communication distance of CAN bus can reach 10KM/5Kbps farthest, and communication speed reaches as high as 1Mbps/40m; Communication media adopts cheap twisted-pair feeder, no specific (special) requirements, and user interface is simple, constitutes custom system easily.
In embodiments of the present invention, with technology maturation, function admirable, CAN bussing technique with low cost applies in the fluorescent lamp intelligent lighting system, make CAN communication cooperatively interact in the electric ballast by the CAN communicating circuit is integrated in, improved the real-time of fluorescent lamp Long-distance Control, reach farther command range with dimmable electronic ballast, traffic rate faster, stronger anti-interference; In addition in the electric ballast control circuit integrated the coupling of lamp power calculate, the CAN Control on Communication, the storage of lamp work state information, the timesharing control of preheating and the functions such as detection processing of control signal, reduced the circuit elements number of devices, improved the circuit working reliability, reached better control precision, made that the volume of electric ballast is littler.
The physical circuit figure of the electric ballast of the tunable optical that the embodiment of the invention provides such as Fig. 2, Fig. 3 and shown in Figure 4 for convenience of explanation, only show the part relevant with the embodiment of the invention, and details are as follows.
Control circuit 18 comprises: the MCU control chip; wherein the PB8 pin of MCU control chip and PB9 pin are as the PWM control output end of control circuit 18; the PB13 pin of MCU control chip and PA8 pin are as the control end of control circuit 18; the PA1 pin of MCU control chip is as the protection control input end of control circuit 18, and the PA2 pin of MCU control chip is as the feedback input end of control circuit 18.The MCU control chip is by PB8 pin and PB9 pin control pairing output PWM frequency, controls the output frequency behind the semi-bridge inversion indirectly, thereby reaches the purpose of control lamp power, realizes the light modulation of fluorescent lamp frequency modulation; The MCU control chip receives the CAN bus signals of CAN communicating circuit 21 outputs, and decodes, and is converted into the control command of electric ballast, and the work state information with electric ballast sends on the CAN bus by CAN communicating circuit 21 simultaneously.The MCU control chip is by the abnormal signal of sampling electric ballast, and the quick closedown electric ballast prevents that tube load 22 from taking place to cause electric ballast to be damaged unusually; The MCU control chip is by the lamp current of sampling electric ballast, internal arithmetic is handled through the MCU control chip, constitute the light modulation current loop control, thereby the light modulation that makes is softer, can also carry out power match by lamp current and calculate, to drive the tube load 22 of different model.
CAN communicating circuit 21 comprises: CAN transceiver U1 and peripheral circuit thereof; Wherein CAN transceiver U1 comprises 8 pins, the VCC pin connects 3.3V voltage, GND pin ground connection, RS pin ground connection, the VREF pin is unsettled not to be connect, and the CANH pin connects the CANH signal, and the CANL pin connects the CANL signal, the D pin is connected to the PB13 pin of described MCU control chip by resistance R 25, and the R pin is connected to the PA8 pin of described MCU control chip by resistance R 26; Resistance R 24 is connected between CANH pin and the CANL pin.
Drive circuit 15 comprises: chip for driving U2, metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, resistance R 13, resistance R 14, capacitor C 1, capacitor C 10 and diode D2; Chip for driving U2 comprises 8 pins, and wherein LIN pin and HIN pin are as the control end of drive circuit 15; The VCO pin is connected to the anode of diode D2; COM pin ground connection; The LO pin is connected to the grid of metal-oxide-semiconductor Q2 by resistance R 14; The VS pin is as the output of drive circuit 15; The HO pin is connected to the grid of metal-oxide-semiconductor Q1 by resistance R 13; The VB pin is connected to the negative electrode of diode D2; The anode of diode D2 is as the second source input of drive circuit 15; The negative electrode of diode D2 also is connected to the VS pin of chip for driving U2 by capacitor C 1; The drain electrode of metal-oxide-semiconductor Q1 is as first power input of drive circuit 15, and the source electrode of metal-oxide-semiconductor Q1 is connected to the drain electrode of metal-oxide-semiconductor Q2, the source ground of metal-oxide-semiconductor Q2, and the link of metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2 also is connected to the VS pin of chip for driving U2; Capacitor C 10 is connected between the anode and ground of diode D2.Drive circuit 15 inside are integrated independently controls output driving circuit mutually, can directly drive two power semiconductor MOSFET, and dynamic response is fast, and driving force is strong, and the operating frequency height has the kinds of protect function.Can export the frequency of the PWM of two-way complementary pairing by MCU control, regulate semi-bridge inversion output ground frequency, the frequency by the control resonant circuit realizes the frequency modulation light modulation of fluorescent lamp.
Output-stage circuit 16 comprises: inductance L 1, inductance L 2, current sharing inductor L3, inductance L 4, inductance L 5, capacitor C 7, capacitor C 8, capacitor C 12, capacitor C 13, capacitor C 14, capacitor C 15, resistance R 8 and resistance R 19; Wherein first end of inductance L 1 is connected back ground connection with the 6th end of inductance L 5, and the 6th end of inductance L 1 is connected with first end of inductance L 5; The link that the 6th end of inductance L 1 is connected with first end of inductance L 5 is connected the other end ground connection of the secondary coil of inductance L 2 by inductance L 4 with the end of capacitor C 13 with the secondary coil of inductance L 2 successively; One end of the primary coil of inductance L 2 is connected to the VS pin of described chip for driving, the other end of the primary coil of inductance L 2 is by capacitor C 12 ground connection, the other end of the primary coil of inductance L 2 also is connected to the 3rd end of described current sharing inductor L3, first end of described current sharing inductor L3 is connected to an end of the primary coil of filament LAMP1 by described resistance R 8, and second end of described current sharing inductor L3 is connected to an end of the primary coil of filament LAMP2 by described resistance R 19; Capacitor C 7 is connected in parallel with resistance R 8, and capacitor C 14 is connected in parallel with resistance R 19; The 4th end of inductance L 1 is connected to the other end of the primary coil of filament LAMP1, and the five terminal of inductance L 1 is connected to an end of the primary coil of filament LAMP1 by capacitor C 8; The 3rd end of inductance L 1 is connected to an end of the secondary coil of filament LAMP1; The 4th end of inductance L 5 is connected to an end of the secondary coil of filament LAMP2, the other end of the secondary coil of filament LAMP2 is connected with the other end of the secondary coil of filament LAMP1, and second end of inductance L 5 is connected to an end of the primary coil of filament LAMP2 by capacitor C 15; The 3rd end of inductance L 5 is connected to the other end of the primary coil of filament LAMP2.
In embodiments of the present invention, inductance L 2 and capacitor C 12 in the output-stage circuit 16 have constituted resonant circuit, and resonance point is
Figure GSA00000047616600061
As MCU control chip output f StartThe time, resonance takes place and produces high pressure in inductance L 2, capacitor C 12, and high pressure is divided into two-way by current sharing inductor L3 (playing the ballast effect simultaneously) and respectively meets a capacitance C7 and capacitance C14, respectively connects two tubes filaments, one end then, with lamp tube starting.Inductance L 1 in the output-stage circuit 16, inductance L 5, inductance L 4, capacitor C 8, capacitor C 15 and capacitor C 13 have constituted the filament pre-heating control circuit; The complementary PWM ripple of MCU control chip output two-way band Dead Time, frequency is f Preheating, duration t Preheating, filament is carried out preheating, after preheating was finished, the PWM frequency was by f Preheating, slide to f rapidly Start, normally light fluorescent tube, wherein f Preheating, t Preheating, f StartCan accurately export by the MCU control chip.At output f PreheatingThe time, owing to just in time be the matched impedance resonance point that C13 and L4 constitute, impedance is very little, preheat curent is very big, makes the abundant preheating of filament.And f PreheatingMuch larger than f Start, resonant circuit is the off-resonance point far away, and impedance is very big, and this moment, lamp tube ends voltage normally started light tube electric voltage well below fluorescent tube, can not produce glow current, and fluorescent tube can not lighted; At output f StartThe time, owing to the resonance point near resonant circuit L2 and C12 formation, lamp tube ends moment generation high pressure is with lamp tube starting.Because f StartMuch smaller than f Preheating, far departing from the preheating matched impedance resonance point that C13 and L4 constitute, impedance is very big, and heater current reduces rapidly, and filament wattage drops to very little.
Charge pump power supply circuits 14 comprise: voltage stabilizing didoe Z2, diode D3, diode D4, resistance R 6, resistance R 7, capacitor C 4 and capacitor C 5; One end of resistance R 6 is as the output of charge pump power supply circuits 14, the other end of resistance R 6 is by capacitor C 4 ground connection, the other end of resistance R 6 also is connected to the negative electrode of diode D3, and the anode of diode D3 is connected to the negative electrode of diode D4, the plus earth of diode D4; One end of resistance R 7 is as the first input end of charge pump power supply circuits 14, and the other end of resistance R 7 is connected to the link that diode D3 is connected with diode D4; One end of capacitor C 5 is as second input of charge pump power supply circuits 14, and the other end of capacitor C 5 is connected to the link that diode D3 is connected with diode D4; The negative electrode of voltage stabilizing didoe Z2 is connected to an end of resistance R 6, the plus earth of voltage stabilizing didoe Z2.When resonant circuit is not worked, mainly power by current-limiting resistance R7 by the 400V direct voltage, after resonant circuit starts, capacitor C 5 is from resonant inductance L2 coupling energy, by diode D3 and diode D4 rectification, capacitor C 4 filtering, provide 15V direct voltage after resistance R 6 current limlitings and the voltage stabilizing didoe Z2 voltage stabilizing.
Current sampling circuit 19 comprises: diode D6, diode D8, diode D9, resistance R 11, resistance R 12, resistance R 21, resistance R 22, resistance R 23 and capacitor C 16; The wherein minus earth of diode D6, the anode of diode D6 are connected to an end of resistance R 12, and the other end of resistance R 12 is connected to the link that the other end of the secondary coil of filament LAMP2 is connected with the other end of the secondary coil of filament LAMP1; One end of resistance R 11 is connected to the negative electrode of diode D6, and two 1 ends of resistance R 11 are connected to the anode of diode D6; The plus earth of diode D8, the negative electrode of diode D8 is connected to the other end of resistance R 12; The anode of diode D9 is connected to the other end of resistance R 12, resistance R 23 and resistance R 22 ground connection of the negative electrode of diode D9 by being connected in series successively; The end that is connected in series of resistance R 23 and resistance R 22 is by capacitor C 16 ground connection, and the end that is connected in series of resistance R 23 and resistance R 22 also is connected to the feedback input end of control circuit by resistance R 21.12 pairs of lamp currents of resistance R are sampled, through diode D9 rectification, the analog voltage signal that obtains after resistance R 21 and resistance R 23 current limlitings, resistance R 22 dividing potential drops and capacitor C 6 filtering, the MCU control chip is the lamp current digital signal by the analog-to-digital conversion interface conversion of inside.
Abnormity protection circuit 20 comprises: the diode D1 of voltage stabilizing didoe Z1, two diodes of series connection, diode D2, capacitor C 1, capacitor C 2, capacitor C 3, resistance R 1, resistance R 2, resistance R 3, resistance R 4 and the resistance R 5 of two diodes of series connection; Wherein the negative electrode of diode D1 is connected the output of back as abnormity protection circuit with the negative electrode of diode D2, the plus earth of diode D1, the plus earth of diode D2, resistance R 4 and resistance R 2 are connected in series in an end of the primary coil of filament LAMP2, and the end that is connected in series of resistance R 4 and resistance R 2 is connected to the end that is connected in series of two diodes among the diode D1 by capacitor C 2; Resistance R 5 and resistance R 3 are connected in series in an end of the primary coil of filament LAMP1, and the end that is connected in series of resistance R 5 and resistance R 3 is connected to the end that is connected in series of two diodes among the diode D2 by capacitor C 3; Resistance R 1 is connected the link of diode D1 and diode D2, and capacitor C 1 is connected in parallel with resistance R 1, the plus earth of voltage stabilizing didoe Z1, and the negative electrode of voltage stabilizing didoe Z1 is connected to the link of diode D1 and diode D2.Abnormity protection circuit 20 has two-way; be symmetrical structure; the high-pressure side of two fluorescent tubes (end of an end of the primary coil of filament LAMP2 and the primary coil of filament LAMP1) connecting resistance R4 and resistance R 5 respectively carries out step-down; carry out dividing potential drop through resistance R 2 and resistance R 3; after the dividing potential drop by after 3 coupling of capacitor C 2 and capacitor C and being sampled; pass through diode D1 and diode D5 rectification again; capacitor C 1 energy storage filtering; after discharge resistance R1 and the voltage stabilizing didoe Z1 voltage stabilizing, obtain the digital signal that the MCU control chip can be discerned.
Fluorescent tube is not on the throne when taking place, when lamp electrode damage, rectifying effect etc. are unusual; to produce high pressure at an end of fluorescent tube; this abnormal pressure changes into by abnormity protection circuit 20 can be the high level signal of MCU control chip identification; after the MCU control chip samples abnormal signal; close PWM output rapidly; electric ballast quits work, and the reliable protection electric ballast is not damaged.
In embodiments of the present invention; the electric ballast of tunable optical also comprises: testing circuit 17; whether be used to detect fluorescent tube on the throne; when fluorescent tube is not on the throne; drag down by 15V direct voltage the output of charge pump power supply circuits; make electric ballast quit work, thereby protected electric ballast when no fluorescent tube, not to be damaged.
As one embodiment of the present of invention, testing circuit 17 comprises: triode Q4, capacitor C 6, resistance R 9, resistance R 10, resistance R 18 and resistance R 20; Wherein resistance R 10 and resistance R 20 are connected in series between the five terminal of second end of inductance L 1 and inductance L 5, and the end that is connected in series of resistance R 10 and resistance R 20 is connected to the base stage of triode Q4; Resistance R 9 and resistance R 18 are connected in series between the five terminal of second end of inductance L 1 and inductance L 5, the end that is connected in series of resistance R 9 and resistance R 18 is connected to the base stage of triode Q4 by capacitor C 6, the end that is connected in series of resistance R 9 and resistance R 18 also is connected to the collector electrode of triode Q4, the grounded emitter of triode Q4, the collector electrode output 15V direct voltage of triode Q4.
When two fluorescent tubes wherein have a fluorescent tube not on the throne; not on the throne as LAMP1; half-bridge driven chip power and PFC chip power DC15V give capacitor C 9 chargings by resistance R 9; capacitor C 9 is full of the electricity back and gives capacitor C 6 reverse chargings with 15V direct voltage stack back by resistance R 10; when the capacitance voltage of capacitor C 6 during greater than the base stage of triode Q4 and the voltage between the collector electrode; triode Q4 conducting; (15V) drags down with collector voltage; half-bridge driven chip and PFC chip power are dragged down will quit work immediately, and the reliable protection circuit is not damaged when no fluorescent tube.All on the throne as two fluorescent tubes, after then the 15V direct voltage passed through resistance R 9 and resistance R 18, the filament that filament that second end of the inductance L of flowing through respectively 1 is connected with the 3rd end and the 4th end of inductance L 5 are connected with five terminal flowed into the earth by two tube filaments at last.Triode Q4 can conducting, and its collector voltage (15V) can not dragged down yet, bridge chip for driving and PFC chip operate as normal, and fluorescent tube is normally lighted.
The electric ballast of tunable optical provided by the invention carries out Based Intelligent Control by the CAN communicating circuit to tube load, has improved the real-time of Long-distance Control, has reached farther command range, faster traffic rate; The reliability height.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.

Claims (9)

1. the electric ballast of a tunable optical, it comprises filter circuit, rectification circuit and the circuit of power factor correction that connects in turn; It is characterized in that, also comprise:
Control circuit;
The charge pump power supply circuits, its first input end is connected to the output of described circuit of power factor correction;
Drive circuit, its first power input is connected to the output of described circuit of power factor correction, the second source input of described drive circuit is connected to the output of described charge pump power supply circuits, and the control end of described drive circuit is connected to the PWM control output end of described control circuit;
Output-stage circuit, its input is connected to the output of described drive circuit, and first output of described output-stage circuit is connected to the input of tube load, and second output of described output-stage circuit is connected to second input of described charge pump power supply circuits;
Current sampling circuit, its input is connected to the input of tube load, and the output of current sampling circuit is connected to the feedback input end of control circuit;
Abnormity protection circuit, its input is connected to the input of tube load, and the output of abnormity protection circuit is connected to the protection control input end of control circuit; And
Be connected the CAN communicating circuit of the control end of described control circuit.
2. electric ballast as claimed in claim 1; it is characterized in that; described control circuit comprises: the MCU control chip; the PB8 pin of described MCU control chip and PB9 pin are as the PWM control output end of described control circuit; the PB13 pin of described MCU control chip and PA8 pin are as the control end of described control circuit; the PA1 pin of described MCU control chip is as the protection control input end of described control circuit, and the PA2 pin of described MCU control chip is as the feedback input end of described control circuit.
3. electric ballast as claimed in claim 2 is characterized in that, described CAN communicating circuit comprises: CAN transceiver and peripheral circuit thereof; Wherein the CAN transceiver comprises 8 pins, the VCC pin connects 3.3V voltage, GND pin ground connection, RS pin ground connection, the VREF pin is unsettled not to be connect, and the CANH pin connects the CANH signal, and the CANL pin connects the CANL signal, the D pin is connected to the PB13 pin of described MCU control chip by resistance R 25, and the R pin is connected to the PA8 pin of described MCU control chip by resistance R 26; Resistance R 24 is connected between CANH pin and the CANL pin.
4. electric ballast as claimed in claim 3 is characterized in that, described drive circuit comprises:
Chip for driving U2, metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, resistance R 13, resistance R 14, capacitor C 1, capacitor C 10 and diode D2;
Described chip for driving U2 comprises 8 pins, and wherein LIN pin and HIN pin are as the control end of described drive circuit; The VCO pin is connected to the anode of described diode D2; COM pin ground connection; The LO pin is connected to the grid of described metal-oxide-semiconductor Q2 by described resistance R 14; The VS pin is as the output of described drive circuit; The HO pin is connected to the grid of described metal-oxide-semiconductor Q1 by described resistance R 13; The VB pin is connected to the negative electrode of described diode D2;
The anode of described diode D2 is as the second source input of described drive circuit; The negative electrode of described diode D2 also is connected to the VS pin of described chip for driving by described capacitor C 1;
The drain electrode of described metal-oxide-semiconductor Q1 is as first power input of described drive circuit, the source electrode of described metal-oxide-semiconductor Q1 is connected to the drain electrode of described metal-oxide-semiconductor Q2, the source ground of described metal-oxide-semiconductor Q2, the link of described metal-oxide-semiconductor Q1 and described metal-oxide-semiconductor Q2 also is connected to the VS pin of described chip for driving;
Described capacitor C 10 is connected between the anode and ground of described diode D2.
5. electric ballast as claimed in claim 4 is characterized in that, described output-stage circuit comprises:
Inductance L 1, inductance L 2, current sharing inductor L3, inductance L 4, inductance L 5, capacitor C 7, capacitor C 8, capacitor C 12, capacitor C 13, capacitor C 14, capacitor C 15, resistance R 8 and resistance R 19;
First end of described inductance L 1 is connected back ground connection with the 6th end of described inductance L 5, the 6th end of described inductance L 1 is connected with first end of described inductance L 5; The link that the 6th end of described inductance L 1 is connected with first end of described inductance L 5 is connected the other end ground connection of the secondary coil of inductance L 2 by inductance L 4 with the end of capacitor C 13 with the secondary coil of inductance L 2 successively;
One end of the primary coil of inductance L 2 is connected to the VS pin of described chip for driving, the other end of the primary coil of inductance L 2 is by capacitor C 12 ground connection, the other end of the primary coil of inductance L 2 also is connected to the 3rd end of described current sharing inductor L3, first end of described current sharing inductor L3 is connected to an end of the primary coil of filament LAMP1 by described resistance R 8, and second end of described current sharing inductor L3 is connected to an end of the primary coil of filament LAMP2 by described resistance R 19;
Capacitor C 7 is connected in parallel with described resistance R 8, and capacitor C 14 is connected in parallel with described resistance R 19;
The 4th end of described inductance L 1 is connected to the other end of the primary coil of filament LAMP1, and the five terminal of described inductance L 1 is connected to an end of the primary coil of filament LAMP1 by capacitor C 8; The 3rd end of described inductance L 1 is connected to an end of the secondary coil of filament LAMP1;
The 4th end of described inductance L 5 is connected to an end of the secondary coil of filament LAMP2, the other end of the secondary coil of filament LAMP2 is connected with the other end of the secondary coil of filament LAMP1, and second end of described inductance L 5 is connected to an end of the primary coil of filament LAMP2 by capacitor C 15; The 3rd end of described inductance L 5 is connected to the other end of the primary coil of filament LAMP2.
6. electric ballast as claimed in claim 5 is characterized in that, described charge pump power supply circuits comprise:
Voltage stabilizing didoe Z2, diode D3, diode D4, resistance R 6, resistance R 7, capacitor C 4 and capacitor C 5;
One end of described resistance R 6 is as the output of described charge pump power supply circuits, the other end of described resistance R 6 is by described capacitor C 4 ground connection, the other end of described resistance R 6 also is connected to the negative electrode of described diode D3, the anode of described diode D3 is connected to the negative electrode of described diode D4, the plus earth of described diode D4;
One end of described resistance R 7 is as the first input end of described charge pump power supply circuits, and the other end of described resistance R 7 is connected to the link that described diode D3 is connected with described diode D4;
One end of described capacitor C 5 is as second input of described charge pump power supply circuits, and the other end of described capacitor C 5 is connected to the link that described diode D3 is connected with described diode D4;
The negative electrode of described voltage stabilizing didoe Z2 is connected to an end of described resistance R 6, the plus earth of described voltage stabilizing didoe Z2.
7. electric ballast as claimed in claim 5 is characterized in that, described current sampling circuit comprises:
Diode D6, diode D8, diode D9, resistance R 11, resistance R 12, resistance R 21, resistance R 22, resistance R 23 and capacitor C 16;
The minus earth of described diode D6, the anode of described diode D6 are connected to an end of resistance R 12, and the other end of resistance R 12 is connected to the link that the other end of the secondary coil of filament LAMP2 is connected with the other end of the secondary coil of filament LAMP1;
One end of resistance R 11 is connected to the negative electrode of diode D6, and two 1 ends of resistance R 11 are connected to the anode of diode D6;
The plus earth of diode D8, the negative electrode of diode D8 is connected to the other end of resistance R 12;
The anode of diode D9 is connected to the other end of resistance R 12, resistance R 23 and resistance R 22 ground connection of the negative electrode of diode D9 by being connected in series successively;
The end that is connected in series of resistance R 23 and resistance R 22 is by capacitor C 16 ground connection, and the end that is connected in series of resistance R 23 and resistance R 22 also is connected to the feedback input end of control circuit by resistance R 21.
8. electric ballast as claimed in claim 5, it is characterized in that, described electric ballast also comprises: testing circuit, and its input is connected to the input of described tube load, and the output of described testing circuit is connected to the output of described charge pump power supply circuits; Whether on the throne, when fluorescent tube is not on the throne, make electric ballast quit work by the voltage that drags down described charge pump power supply circuits output if being used to detect fluorescent tube.
9. electric ballast as claimed in claim 8 is characterized in that, described testing circuit comprises:
Be connected in series in resistance R 9 and resistance R 18, triode Q4 and capacitor C 6 between the five terminal of resistance R 10 and resistance R 20, second end that is connected in series in inductance L 1 and inductance L 5 between the five terminal of second end of inductance L 1 and inductance L 5;
The end that is connected in series of resistance R 10 and resistance R 20 is connected to the base stage of described triode Q4;
The base stage that is connected to described triode Q4 by capacitor C 6 is held in being connected in series of resistance R 9 and resistance R 18, and the end that is connected in series of resistance R 9 and resistance R 18 also is connected to the collector electrode of described triode Q4;
The grounded emitter of described triode Q4, the collector electrode of described triode Q4 is connected to the output of described charge pump power supply circuits.
CN2010101114389A 2010-02-08 2010-02-08 Dimmable electronic ballast Expired - Fee Related CN101772250B (en)

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CN102131334A (en) * 2011-04-15 2011-07-20 苏州市纽克斯照明有限公司 System and method for controlling lighting current of electronic ballast
CN102378441A (en) * 2010-08-24 2012-03-14 苏州大学 Streetlight control device and system based on technology of internet of things
CN102695347A (en) * 2011-03-22 2012-09-26 海洋王照明科技股份有限公司 Power supply circuit for electronic ballast control chip
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CN102843848A (en) * 2011-06-22 2012-12-26 海洋王照明科技股份有限公司 Electronic ballast circuit used for remote control type emergency lamp
CN102843849A (en) * 2011-06-22 2012-12-26 海洋王照明科技股份有限公司 Electronic ballast circuit for emergency lamp
CN104822217A (en) * 2015-05-05 2015-08-05 浙江开元光电照明科技有限公司 Electrodeless fluorescent lamp dimming method controlling duty ratio by double-frequency square wave pulse signal generator
CN107360657A (en) * 2017-06-17 2017-11-17 泉州师范学院 A kind of high-power remote controlled tunable optical high-pressure mercury lamp driver
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CN102378441A (en) * 2010-08-24 2012-03-14 苏州大学 Streetlight control device and system based on technology of internet of things
CN102695347B (en) * 2011-03-22 2014-05-21 海洋王照明科技股份有限公司 Power supply circuit for electronic ballast control chip
CN102695347A (en) * 2011-03-22 2012-09-26 海洋王照明科技股份有限公司 Power supply circuit for electronic ballast control chip
CN102131334A (en) * 2011-04-15 2011-07-20 苏州市纽克斯照明有限公司 System and method for controlling lighting current of electronic ballast
CN102131334B (en) * 2011-04-15 2014-04-16 苏州市纽克斯照明有限公司 System and method for controlling lighting current of electronic ballast
CN102769986A (en) * 2011-05-06 2012-11-07 海洋王照明科技股份有限公司 Electronic ballast
CN102769986B (en) * 2011-05-06 2014-10-15 海洋王照明科技股份有限公司 Electronic ballast
CN102843849B (en) * 2011-06-22 2014-10-15 海洋王照明科技股份有限公司 electronic ballast circuit for emergency lamp
CN102843849A (en) * 2011-06-22 2012-12-26 海洋王照明科技股份有限公司 Electronic ballast circuit for emergency lamp
CN102843848A (en) * 2011-06-22 2012-12-26 海洋王照明科技股份有限公司 Electronic ballast circuit used for remote control type emergency lamp
CN104822217A (en) * 2015-05-05 2015-08-05 浙江开元光电照明科技有限公司 Electrodeless fluorescent lamp dimming method controlling duty ratio by double-frequency square wave pulse signal generator
CN107360657A (en) * 2017-06-17 2017-11-17 泉州师范学院 A kind of high-power remote controlled tunable optical high-pressure mercury lamp driver
CN107360657B (en) * 2017-06-17 2023-10-17 泉州师范学院 High-power remote-control light-adjustable high-voltage sodium lamp driver
CN108200700A (en) * 2017-12-29 2018-06-22 合肥大明节能科技股份有限公司 A kind of single-lamp controller based on DALI agreements
CN108365750A (en) * 2018-03-12 2018-08-03 昌芯(西安)集成电路科技有限责任公司 Buck type DC/DC converter circuits with antivibration bell modular circuit
CN108365750B (en) * 2018-03-12 2020-04-03 昌芯(西安)集成电路科技有限责任公司 Buck type DC/DC converter circuit with anti-ringing module circuit

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