CN104968135A - Digital control circuit of HID lamp electronic ballast without electrolytic capacitor - Google Patents
Digital control circuit of HID lamp electronic ballast without electrolytic capacitor Download PDFInfo
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Abstract
The invention provides a digital control circuit of an HID lamp electronic ballast without an electrolytic capacitor. The digital control circuit comprises an MCU, an MCU power supply sampling circuit, a power adjustment voltage doubling circuit, an input signal sampling module, an output signal sampling module and a starting circuit. An AC power supply UIN supplies electric energy to the power adjustment voltage doubling circuit. The induction coil NV of the MCU power supply sampling circuit is arranged to be corresponding to an inductor L1 and the inductor L2 of the power adjustment voltage doubling circuit. The MCU power supply sampling circuit supplies electric energy and sampling signals to the MCU according to induction electric signals generated by the induction coil NV. After a load HID lamp is lit up, the input signal sampling module and the output signal sampling module are respectively used for acquiring input signals of the AC power supply UIN and output signals transmitted to the load HID lamp and transmitting the signals to the MCU. The MCU controls asynchronous work frequency of a switch S1 and a switch S2 and enables power of the load HID lamp to be stable via the power adjustment voltage doubling circuit. The digital control circuit of the HID lamp electronic ballast without the electrolytic capacitor has advantages of stability and reliability, constant power operation, elimination of acoustic resonance hazard, a current-limiting protection function and high reliability.
Description
Technical field
the present invention relates to HID lamp electric ballast technical field, especially relate to a kind of digital control circuit of electronic ballast of HID light without electrolytic capacitor.
Background technology
At the abbreviation that HID lamp is " high-intensity gas discharge lamp ", such as: xenon lamp, Metal halogen lamp, high-pressure mercury lamp, high-pressure sodium lamp, thallium vanadium receive lamp ... etc., existing ripe technique and a large amount of suitability for industrialized production equipment are produced in enormous quantities, and HID is still the global high-power preferred main force of public illumination cost performance so far.In order to raise the efficiency, people have invented a kind of new HID lamp, and new HID lamp is compared with traditional HID lamp, and people, for having increased high-intensity-gas pressure in HID lamp electric arc tube, promotes HID lamp arc voltage.When equal lamp power, lamp arc current declines, and lamp export license is declined, longer than traditional HID lamp life-span.The life-span of new HID lamp, can than the beautiful LED life-span more than 50,000 hours; Especially temperature is comparatively under high workload environmental condition, and new HID resistance to elevated temperatures is better than LED, and operability is better than LED.But new HID lamp starter difficulty, hot starter is more difficult, and the control difficulty of lamp electric arc and lamp power stability is large, potential acoustic resonance danger and disaster.
At present, it is general that new HID lamp electric ballast must adapt to exchange 100 volts to 280 volts industrial powers at universal mains, and the new HID lamp starter allowing modulating voltage 250 volts or higher that can be reliable and stable, stable, output-constant operation, technical difficulty is quite large.Old way continues to use the topology of BOOST booster type APFC reliably, can obtain voltage stabilizing 400 volts of bus direct currents, powering drives new HID lamp to full-bridge or half bridgepush pull, and this is scheme conventional both at home and abroad, but cost performance is low, so new HID lamp electric ballast price can not be fallen at present.
Summary of the invention
In order to overcome the problems referred to above, the present invention provides the digital control circuit of the electronic ballast of HID light without electrolytic capacitor that a kind of reliable and stable, output-constant operation, elimination acoustic resonance harm and reliability are high to society.
Technical scheme of the present invention is: the digital control circuit providing a kind of electronic ballast of HID light without electrolytic capacitor, comprise MCU, MCU powers sample circuit, power adjustment voltage-multiplying circuit, input signal sampling module, output signal sampling module and starting circuit, AC power UIN provides electric energy to described power adjustment voltage-multiplying circuit, the power inductance L 1 of the corresponding described power adjustment voltage-multiplying circuit of induction coil NV of sample circuit and inductance L 2 of described MCU is arranged, the described MCU electrical signal of reaction that sample circuit produces according to described induction coil NV of powering provides electric energy and sampled signal to described MCU,
When switch S 1 in described power adjustment voltage-multiplying circuit and switch S 2 do not work, described power adjustment voltage-multiplying circuit carries out voltage multiplying rectifier to AC power UIN, and the voltage multiplying rectifier signal of telecommunication is flowed to described starting circuit and load HID lamp, described starting circuit lights load HID lamp according to the voltage multiplying rectifier signal of telecommunication received;
After load HID lamp is lit, described input signal sampling module and described output signal sampling module are respectively used to gather the input signal of AC power UIN and flow to the output signal of load HID lamp, described input signal sampling module and described output signal sampling module respectively to the input signal collected and output signal process and by process after information transmission give described MCU, described MCU controls the asynchronous working frequency of described switch S 1 and described switch S 2 according to the information received and sampled signal, and the power stability of load HID lamp is made by described power adjustment voltage-multiplying circuit.
As improvement of the present invention, described power adjustment voltage-multiplying circuit comprises diode D1, the diode D4 that the positive pole of negative pole and described diode D1 is electrically connected, diode D3, the diode D2 that the positive pole of negative pole and described diode D3 is electrically connected, diode DF1, diode DF2, and the electric capacity C1 be electrically connected successively, described switch S 1, described inductance L 1, described inductance L 2, described switch S 2 and electric capacity C2; the L end of AC power UIN is electrically connected with the common port of described inductance L 1 and described inductance L 2, the N end of AC power UIN is electrically connected by the common port of load HID lamp and described electric capacity C1 and described electric capacity C2, the negative pole of described diode D1 and described diode D3 is electrically connected with the common port of described switch S 1 and described electric capacity C1 respectively, the positive pole of described diode D4 and described diode D2 is electrically connected with the common port of described switch S 2 and described electric capacity C2 respectively, the positive pole of described diode D1 and the common port of described switch S 1 and described inductance L 1 are electrically connected, the positive pole of described diode D3 and the common port of described switch S 2 and described inductance L 2 are electrically connected, described diode DF1 and described diode DF2 is connected in parallel on the two ends of described electric capacity C1 and described electric capacity C2 respectively, the positive pole of described diode DF1 and the negative pole of described diode DF2 are electrically connected with the common port of described electric capacity C1 and described electric capacity C2 respectively, the control end of described switch S 1 and described switch S 2 is electrically connected with described MCU respectively.
As improvement of the present invention, described MCU sample circuit of powering comprises induction coil NV, diode DV1, diode DV2, voltage stabilizing didoe DV, electric capacity CV1, electric capacity CV2, electric capacity CV, resistance RJ1, the VCC end of resistance RJ2 and resistance RC, described MCU respectively with one end of described electric capacity CV, the negative pole of described voltage stabilizing didoe DZ, one end of described electric capacity CV1, one end of the negative pole of described diode DV1 and described resistance RJ1 is electrically connected, and the other end of described resistance RJ1 and the negative pole of described diode D1 are electrically connected, the GND of described MCU hold respectively with the other end of described electric capacity CV, the positive pole of described voltage stabilizing didoe DV, one end of described electric capacity CV2, the positive pole of described diode DV2 and one end of described resistance RJ2 are electrically electrically connected, the other end of described electric capacity CV1 and the other end of described electric capacity CV2 are electrically connected with the other end of described induction coil NV respectively, the positive pole of described diode DV1 and the negative pole of described diode DV2 are electrically connected with one end of described induction coil NV respectively, the other end of described resistance RJ2 and the positive pole of described diode D4 are electrically connected, and the VSEN end of described MCU is electrically connected by the negative pole of described resistance RC and described diode DV1.
As improvement of the present invention, described starting circuit comprises starter J, electric capacity CP, be connected in parallel on the resistance RP at described electric capacity CP two ends, diode TVS, armature winding NJ1, armature winding NJ2, electric capacity CJ1, secondary winding LR and electric capacity CJ2, one end of described secondary winding LR respectively with the common port of described electric capacity C1 and described electric capacity C2, one end of described electric capacity CP is electrically connected, the other end of described secondary winding LR and the UO of load HID lamp hold and are electrically connected, the O end of load HID lamp respectively with the other end of described electric capacity CP, the N end of AC power and one end of described starter J are electrically connected, the other end of described starter J and the negative pole of described diode TVS are electrically connected, the positive pole of described diode TVS and the UO of load HID lamp hold and are electrically connected, described secondary winding LR and described armature winding NJ1 and described armature winding NJ2 is corresponding arranges, one end and the described starter J of described armature winding NJ1 are electrically connected, the other end of described armature winding NJ1 is electrically connected with one end of described armature winding NJ2 and one end of described electric capacity CJ1 respectively, the other end and the described starter J of described electric capacity CJ1 are electrically connected, the other end of described armature winding NJ2 is electrically connected by described electric capacity CJ2 and described starter J.
As improvement of the present invention, also comprise electromagnetic interface filter, the output of described electromagnetic interface filter and AC power UIN is electrically connected.
As improvement of the present invention, also comprise light modulation toning circuit, described light modulation toning circuit and described MCU are electrically connected.
As improvement of the present invention, also comprise protective circuit, described protective circuit and described MCU are electrically connected.
The present invention due to have employed MCU, MCU power sample circuit, power adjustment voltage-multiplying circuit, input signal sampling module and output signal sampling module, times current effect is realized by inductance L 1 and inductance L 2, effectively reduce the current stress of switch S 1 and switch S 2, and switch S 1 and switch S 2 have employed Sofe Switch, take precautions against voltage stress damage further, promote reliability; Without electrochemical capacitor, realize " all solid state ", effectively improve reliability, realize more than the 50000 hours targets without damage; And solve the discrete unreliability problem of AC power zero passage Energy transfer of conventional bridge rectification, effectively suppressed THD% and electromagnetic compatibility conduction EMC and disturbed, reduce electric network pollution, improve electric work efficiency, effectively degrade acoustic resonance; MCU powers the employing of sample circuit, input signal sampling module and output signal sampling module; make MCU can the asynchronous working frequency of control switch S1 and switch S 2, there is reliable and stable, output-constant operation, elimination acoustic resonance harm, current-limiting protection function and high reliability.
Accompanying drawing explanation
Fig. 1 is circuit theory schematic diagram of the present invention.
Wherein: 1.MCU; 2. output signal sampling module; 3. input signal sampling module; 4. light modulation toning circuit; 5. protective circuit; 6. load LED lamp; 7. starter J; 8.EMI filter.
Embodiment
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " connection ", " being connected " should be interpreted broadly, and such as, can be fixedly connected with, and also can be that dismounting connects, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also can be indirectly be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition above-mentioned term can be understood at concrete meaning of the present invention.
Refer to Fig. 1, the digital control circuit of what Fig. 1 disclosed is a kind of electronic ballast of HID light without electrolytic capacitor, comprise MCU1, MCU1 powers sample circuit, power adjustment voltage-multiplying circuit, input signal sampling module 3, output signal sampling module 2 and starting circuit, AC power UIN provides electric energy to described power adjustment voltage-multiplying circuit, the power inductance L 1 of the corresponding described power adjustment voltage-multiplying circuit of induction coil NV of sample circuit and inductance L 2 of described MCU1 is arranged, the described MCU1 electrical signal of reaction that sample circuit produces according to described induction coil NV of powering provides electric energy and sampled signal to described MCU1,
When switch S 1 in described power adjustment voltage-multiplying circuit and switch S 2 do not work, described power adjustment voltage-multiplying circuit carries out voltage multiplying rectifier to AC power UIN, and the voltage multiplying rectifier signal of telecommunication is flowed to described starting circuit and load HID lamp 6, described starting circuit lights load HID lamp 6 according to the voltage multiplying rectifier signal of telecommunication received;
After load HID lamp 6 is lit, described input signal sampling module 3 and described output signal sampling module 2 are respectively used to gather the input signal of AC power UIN and flow to the output signal of load HID lamp 6, described input signal sampling module 3 and described output signal sampling module 2 respectively to the input signal collected and output signal process and by process after information transmission give described MCU1, described MCU1 controls the asynchronous working frequency of described switch S 1 and described switch S 2 according to the information received and sampled signal, and the power stability of load HID lamp 6 is made by described power adjustment voltage-multiplying circuit.
In the present embodiment, described power adjustment voltage-multiplying circuit comprises diode D1, the diode D4 that the positive pole of negative pole and described diode D1 is electrically connected, diode D3, the diode D2 that the positive pole of negative pole and described diode D3 is electrically connected, diode DF1, diode DF2, and the electric capacity C1 be electrically connected successively, described switch S 1, described inductance L 1, described inductance L 2, described switch S 2 and electric capacity C2; the L end of AC power UIN is electrically connected with the common port of described inductance L 1 and described inductance L 2, the N end of AC power UIN is electrically connected by the common port of load HID lamp 6 with described electric capacity C1 and described electric capacity C2, the negative pole of described diode D1 and described diode D3 is electrically connected with the common port of described switch S 1 and described electric capacity C1 respectively, the positive pole of described diode D4 and described diode D2 is electrically connected with the common port of described switch S 2 and described electric capacity C2 respectively, the positive pole of described diode D1 and the common port of described switch S 1 and described inductance L 1 are electrically connected, the positive pole of described diode D3 and the common port of described switch S 2 and described inductance L 2 are electrically connected, described diode DF1 and described diode DF2 is connected in parallel on the two ends of described electric capacity C1 and described electric capacity C2 respectively, the positive pole of described diode DF1 and the negative pole of described diode DF2 are electrically connected with the common port of described electric capacity C1 and described electric capacity C2 respectively, the control end of described switch S 1 and described switch S 2 is electrically connected with described MCU1 respectively.
In the present embodiment, described MCU1 sample circuit of powering comprises induction coil NV, diode DV1, diode DV2, voltage stabilizing didoe DV, electric capacity CV1, electric capacity CV2, electric capacity CV, resistance RJ1, the VCC end of resistance RJ2 and resistance RC, described MCU1 respectively with one end of described electric capacity CV, the negative pole of described voltage stabilizing didoe DZ, one end of described electric capacity CV1, one end of the negative pole of described diode DV1 and described resistance RJ1 is electrically connected, and the other end of described resistance RJ1 and the negative pole of described diode D1 are electrically connected, the GND of described MCU1 hold respectively with the other end of described electric capacity CV, the positive pole of described voltage stabilizing didoe DV, one end of described electric capacity CV2, the positive pole of described diode DV2 and one end of described resistance RJ2 are electrically electrically connected, the other end of described electric capacity CV1 and the other end of described electric capacity CV2 are electrically connected with the other end of described induction coil NV respectively, the positive pole of described diode DV1 and the negative pole of described diode DV2 are electrically connected with one end of described induction coil NV respectively, the other end of described resistance RJ2 and the positive pole of described diode D4 are electrically connected, and the VSEN end of described MCU1 is electrically connected by the negative pole of described resistance RC and described diode DV1.
In the present embodiment; described MCU1 sample circuit of powering gathers the signal of telecommunication in described inductance L 1, described inductance L 2; when the electric current of the signal of telecommunication gathered is greater than maximum rating; described MCU1 carries out and cuts ripple control; namely control the disconnection of described switch S 1 or described switch S 2, make described digital control circuit have the function of current-limiting protection.
In the present embodiment, described starting circuit comprises starter J7, electric capacity CP, be connected in parallel on the resistance RP at described electric capacity CP two ends, diode TVS, armature winding NJ1, armature winding NJ2, electric capacity CJ1, secondary winding LR and electric capacity CJ2, one end of described secondary winding LR respectively with the common port of described electric capacity C1 and described electric capacity C2, one end of described electric capacity CP is electrically connected, the other end of described secondary winding LR and the UO of load HID lamp 6 hold and are electrically connected, the O end of load HID lamp 6 respectively with the other end of described electric capacity CP, the N end of AC power and one end of described starter J7 are electrically connected, the other end of described starter J7 and the negative pole of described diode TVS are electrically connected, the positive pole of described diode TVS and the UO of load HID lamp 6 hold and are electrically connected, described secondary winding LR and described armature winding NJ1 and described armature winding NJ2 is corresponding arranges, one end and the described starter J7 of described armature winding NJ1 are electrically connected, the other end of described armature winding NJ1 is electrically connected with one end of described armature winding NJ2 and one end of described electric capacity CJ1 respectively, the other end and the described starter J7 of described electric capacity CJ1 are electrically connected, the other end of described armature winding NJ2 is electrically connected by described electric capacity CJ2 and described starter J7.
In the present embodiment, also comprise electromagnetic interface filter 8, described electromagnetic interface filter 8 is electrically connected with the output of AC power UIN.Described input signal sampling module 3 and described output signal sampling module 2 are the circuit with single-chip microcomputer, are provided with safety electric capacity CX between the L end of described AC power UIN and N end.Described electric capacity VC, described electric capacity CV1, described electric capacity CV2, described electric capacity CP, described electric capacity C1 and described electric capacity C2 all do not use electrochemical capacitor, and adopt the electric capacity not having liquid electrolyte.The O end of described load HID lamp 6 and one end of described starter J7 and one end of electric capacity CY are electrically connected, the other end ground connection of described electric capacity CY.
In the present embodiment, described switch S 1 and described switch S 2 are soft switch circuits, and described soft switch circuit can be the ZCS Sofe Switch of " zero current passing ", or the ZVS Sofe Switch of " no-voltage cut-off ".Also comprise light modulation toning circuit 4, described light modulation toning circuit 4 is electrically connected with described MCU1, can mix colours that circuit 4 is manual, wireless network or cable network remote control adjustment by described light modulation.Also comprise protective circuit 5, described protective circuit 5 is electrically connected with described MCU1, and described protective circuit 5 comprises overvoltage protection, overcurrent protection, short-circuit protection, overvoltage protection and under-voltage protection etc.
In the present invention, when described switch S 1 and described switch S 2 do not work, the voltage multiplying rectifier principle of described power adjustment voltage-multiplying circuit is as follows:
(1) when the L end of AC power U1N is high potential, and N end for electronegative potential time, the electric current of AC power U1N is held by L and is flowed into described inductance L 1 and described inductance L 2, the road electric current flowing into described inductance L 1 is charged to described electric capacity C1 by described diode D1, another road electric current simultaneously flowing into described inductance L 2 is charged to described electric capacity C1 by described diode D3, makes described electric capacity C1 obtain charging voltage UC1.And the charging current in loop flows through described electric capacity CP and described resistance RP, the charging current in last loop gets back to the N end of AC power UIN, completes the closed-loop path that AC power UIN positive half wave charges to described electric capacity C1.
(2) when the L end of AC power UIN is for electronegative potential, and N end is high potential, and electric current, through described electric capacity CP and described resistance RP, charges to described electric capacity C2, makes described electric capacity C2 obtain charging voltage UC2.And loop Zhong mono-tunnel charging current flows into described inductance L 2 through described diode D2, eventually pass the L end that described inductance L 2 flows to AC power UIN.Another road charging current in coincidence circuit flows into described inductance L 1 through described diode D4, then the L end of AC power UIN is flowed to by described inductance L 1, complete AC power UIN and bear half-wave closed-loop path, and described electric capacity C2 and described electric capacity C1 forward overlapped in series, achieve a times voltage commutation, the starter of load HID lamp 6 and the need of stable operation can be met like this.
(3) described electric capacity CP is that load HID lamp 6 triggers the work of short wink, after load HID lamp 6 starter, described electric capacity CP and described resistance RP deactivates all automatically, and described inductance L R has high frequency current-limiting impedance function, and described resistance RP is the bleeder resistance of described electric capacity CP.
In the present invention, the operation principle when described switch S 1 and described switch S 2 are controlled by described MCU1 is as follows:
(11) when described MCU1 high frequency duty ratio DP signal controlling described in switch S 1 conducting time, described switch S 2 is closed.The operating voltage of described switch S 1 is the instantaneous value that the direct voltage of described electric capacity C1 added or deducted AC power UIN, and its limit is (UC1 ± QUOTE
uIN).
The first pulse current direction during described switch S 1 conducting determines the electric current high frequency positive half wave sense of current of load HID lamp 6, first pulse current flows to described switch S 1 from the anode of described electric capacity C1, and the L end of AC power UIN is flow into from described inductance L 1, then be back to the negative terminal of described electric capacity C1 successively by load HID lamp 6 and described inductance L R, complete closed-loop path.The AC power UIN input current energy at the two ends of described safety electric capacity CX is in the loop got involved, the harm of effectively compacting load HID lamp 6 " acoustic resonance ".
(12) when described MCU1 high frequency duty ratio DP signal controlling described in switch S 1 close time, and described switch S 2 is still the Dead Time being in closedown, and namely described switch S 1 and described switch S 2 are all in turn-off transient.Because the sense of current in described inductance L 1 can not suddenly change, therefore there is afterflow in the loop, its essence is the instantaneous process of one of active PFC doublebeat, at this moment freewheel current (i.e. one of active PFC electric current), the afterflow of described inductance L 1 is given by described diode D4, and flow to load HID lamp 6 by AC power UIN, load HID lamp 6 is not put out, this freewheel current flows to described electric capacity C2 through described inductance L R again, the last anode flowing to described diode D4 from described electric capacity C2, such design improves Active PFC, reduce the harmonic distortion of electric current, improve electric work efficiency.
(13) as the high frequency duty ratio QUOTE of described MCU1
described in signal controlling during switch S 2 conducting, described switch S 1 is closed.The operating voltage of described switch S 2 is instantaneous values that the direct voltage of described electric capacity C2 added or deducted AC power UIN, and its limit is (UC2 ± QUOTE
uIN).
The second pulse current direction during described switch S 1 conducting determines the electric current high frequency negative half-wave current direction of load HID lamp 6, second pulse current flows through described inductance L R, load HID lamp 6 and AC power UIN successively from the anode of described electric capacity C2, series connection adds deduct after AC power UIN instantaneous value, flow to described inductance L 2, and flow to described switch S 2 by described inductance L 2, finally get back to the negative terminal of described electric capacity C2, complete load HID lamp 6 electric current high frequency negative half-wave closed-loop path.
(14) as the high frequency duty ratio QUOTE of described MCU1
when described in signal controlling, switch S 2 is closed, and described switch S 1 is still the Dead Time being in closedown, and namely described switch S 1 and described switch S 2 are all in turn-off transient.Because the sense of current in described inductance L 2 can not suddenly change, therefore there is afterflow in the loop, its essence is the instantaneous process of one of active PFC doublebeat, at this moment freewheel current (i.e. active PFC electric current two), by described diode D3 afterflow to described electric capacity C1, described inductance L R and load HID lamp 6, maintain the electric arc not blow-out of load HID lamp 6, then described inductance L 2 is got back to, the positive pole of described diode D3 is flowed to from described inductance L 2, complete two closed-loop paths of clapping of active PFC, such design improves Active PFC, reduce the harmonic distortion of electric current, improve electric work efficiency.
In the present invention, the existence of described inductance L 1 and described L2, relieves described switch S 1 and the straight-through danger of described switch S 2.Although because described S1 and described S2 is all controlled by high frequency duty cycle signals DP and QUOTE of described MCU1
, and in described switch S 1 between the conducting of described switch S 2, also leaving the time of dead band (described switch S 1 and described switch S 2 are all closed), i.e. the above-mentioned doublebeat active PFC time, original described switch S 1 and described switch S 2 are impossible conducting simultaneously.But once a certain switch is breakdown among described switch S 1 and described switch S 2, just the straight-through harm of LLC likely occurs, so seal in described inductance L 1 and described inductance L 2 isolates described switch S 1 and described switch S 2 is very important.Practice simulation LLC leads directly to fault, finds that through current is very limited, and described MCU1 has enough time to start abnormal protection, stops to drive described switch S 1 and described switch S 2, and sends numerical control instruction, to identify that fault part is in order to giving rapid maintenance in time.
In the present invention, described inductance L 1 and described inductance L 2 there is a times current effect, when when the conducting of described switch S 1, described switch S 2 is ended, section first pulse current flows in described inductance L 1 at this moment, induced current flows into described inductance L 2 by described diode D2 simultaneously, first pulse current flows to load HID lamp 6 with induced current, so the high frequency positive half wave arc current of synthesis load HID lamp 6, described inductance L 1 that Here it is and described inductance L 2 doubly flow effect.
In like manner, when described switch S 1 transfers closedown to by conducting, and during the dead band that described switch S 2 is still closed, still there is times current effect in described inductance L 1 and described inductance L 2.As can be seen here, times current effect of described inductance L 1 and described inductance L 2 just, significantly reduces the current stress of described switch S 1 and described switch S 2.
In the present invention, the energy of described starter J7 is from the two ends of load HID lamp 6, and when load HID lamp 6 is normally run, load HID lamp 6 voltage is less than the breakover voltage of described diode TVS, equals the power supply automatically having cut off described starter J7.And after load HID lamp 6 arc extinction, load HID lamp 6 is equivalent to open circuit, alternating voltage between its two electrode equals the transient voltage UCP at described electric capacity CP two ends, make described diode TVS conducting, described starter J7 obtains electric, discharged to described armature winding NJ1 and described armature winding NJ2 by described electric capacity CJ1 and described electric capacity CJ2, form the resonance of multiple frequency, described secondary winding LR is boosted, and when making the amplitude of the voltage U LR of described secondary winding LR and width thereof meet load HID lamp 6 starter energy requirement, voltage U LR energy is coupled to two electrodes in load HID lamp 6 by described electric capacity CP, just cause load HID lamp 6 electric arc.
In the present invention, AC power UIN place in circuit again after described electromagnetic interface filter 8.
In the present invention, described output signal sampling module 2 sampling flows to the output signal of load HID lamp 6, comprise output voltage and the output current of output signal, and the rated input power of the performance number of output signal and setting is carried out contrast computing, comparison result is transported to described MCU1, described MCU1 controls described switch S 1 respectively according to comparison result and described switch S 2 works, thus duty cycle adjustment is carried out to the signal of telecommunication in described power adjustment voltage-multiplying circuit, the electrical power flowing to load HID lamp 6 is stablized.
In the present invention, described input signal sampling module 3 samples the input signal of AC power UIN, comprise input voltage and the input current of input signal, and the rated input power of the performance number of input signal and setting is carried out contrast computing, comparison result is transported to described MCU1, described MCU1 controls described switch S 1 respectively according to comparison result and described switch S 2 works, and input power is stablized.
Claims (7)
1. the digital control circuit of an electronic ballast of HID light without electrolytic capacitor, it is characterized in that: comprise MCU, MCU powers sample circuit, power adjustment voltage-multiplying circuit, input signal sampling module, output signal sampling module and starting circuit, AC power UIN provides electric energy to described power adjustment voltage-multiplying circuit, the power inductance L 1 of the corresponding described power adjustment voltage-multiplying circuit of induction coil NV of sample circuit and inductance L 2 of described MCU is arranged, the described MCU electrical signal of reaction that sample circuit produces according to described induction coil NV of powering provides electric energy and sampled signal to described MCU,
When switch S 1 in described power adjustment voltage-multiplying circuit and switch S 2 do not work, described power adjustment voltage-multiplying circuit carries out voltage multiplying rectifier to AC power UIN, and the voltage multiplying rectifier signal of telecommunication is flowed to described starting circuit and load HID lamp, described starting circuit lights load HID lamp according to the voltage multiplying rectifier signal of telecommunication received;
After load HID lamp is lit, described input signal sampling module and described output signal sampling module are respectively used to gather the input signal of AC power UIN and flow to the output signal of load HID lamp, described input signal sampling module and described output signal sampling module respectively to the input signal collected and output signal process and by process after information transmission give described MCU, described MCU controls the asynchronous working frequency of described switch S 1 and described switch S 2 according to the information received and sampled signal, and the power stability of load HID lamp is made by described power adjustment voltage-multiplying circuit.
2. the digital control circuit of electronic ballast of HID light without electrolytic capacitor according to claim 1, it is characterized in that: described power adjustment voltage-multiplying circuit comprises diode D1, the diode D4 that the positive pole of negative pole and described diode D1 is electrically connected, diode D3, the diode D2 that the positive pole of negative pole and described diode D3 is electrically connected, diode DF1, diode DF2, and the electric capacity C1 be electrically connected successively, described switch S 1, described inductance L 1, described inductance L 2, described switch S 2 and electric capacity C2; the L end of AC power UIN is electrically connected with the common port of described inductance L 1 and described inductance L 2, the N end of AC power UIN is electrically connected by the common port of load HID lamp and described electric capacity C1 and described electric capacity C2, the negative pole of described diode D1 and described diode D3 is electrically connected with the common port of described switch S 1 and described electric capacity C1 respectively, the positive pole of described diode D4 and described diode D2 is electrically connected with the common port of described switch S 2 and described electric capacity C2 respectively, the positive pole of described diode D1 and the common port of described switch S 1 and described inductance L 1 are electrically connected, the positive pole of described diode D3 and the common port of described switch S 2 and described inductance L 2 are electrically connected, described diode DF1 and described diode DF2 is connected in parallel on the two ends of described electric capacity C1 and described electric capacity C2 respectively, the positive pole of described diode DF1 and the negative pole of described diode DF2 are electrically connected with the common port of described electric capacity C1 and described electric capacity C2 respectively, the control end of described switch S 1 and described switch S 2 is electrically connected with described MCU respectively.
3. the digital control circuit of electronic ballast of HID light without electrolytic capacitor according to claim 2, is characterized in that: described MCU sample circuit of powering comprises induction coil NV, diode DV1, diode DV2, voltage stabilizing didoe DV, electric capacity CV1, electric capacity CV2, electric capacity CV, resistance RJ1, the VCC end of resistance RJ2 and resistance RC, described MCU respectively with one end of described electric capacity CV, the negative pole of described voltage stabilizing didoe DZ, one end of described electric capacity CV1, one end of the negative pole of described diode DV1 and described resistance RJ1 is electrically connected, and the other end of described resistance RJ1 and the negative pole of described diode D1 are electrically connected, the GND of described MCU hold respectively with the other end of described electric capacity CV, the positive pole of described voltage stabilizing didoe DV, one end of described electric capacity CV2, the positive pole of described diode DV2 and one end of described resistance RJ2 are electrically electrically connected, the other end of described electric capacity CV1 and the other end of described electric capacity CV2 are electrically connected with the other end of described induction coil NV respectively, the positive pole of described diode DV1 and the negative pole of described diode DV2 are electrically connected with one end of described induction coil NV respectively, the other end of described resistance RJ2 and the positive pole of described diode D4 are electrically connected, and the VSEN end of described MCU is electrically connected by the negative pole of described resistance RC and described diode DV1.
4. the digital control circuit of electronic ballast of HID light without electrolytic capacitor according to claim 2, it is characterized in that: described starting circuit comprises starter J, electric capacity CP, be connected in parallel on the resistance RP at described electric capacity CP two ends, diode TVS, armature winding NJ1, armature winding NJ2, electric capacity CJ1, secondary winding LR and electric capacity CJ2, one end of described secondary winding LR respectively with the common port of described electric capacity C1 and described electric capacity C2, one end of described electric capacity CP is electrically connected, the other end of described secondary winding LR and the UO of load HID lamp hold and are electrically connected, the O end of load HID lamp respectively with the other end of described electric capacity CP, the N end of AC power and one end of described starter J are electrically connected, the other end of described starter J and the negative pole of described diode TVS are electrically connected, the positive pole of described diode TVS and the UO of load HID lamp hold and are electrically connected, described secondary winding LR and described armature winding NJ1 and described armature winding NJ2 is corresponding arranges, one end and the described starter J of described armature winding NJ1 are electrically connected, the other end of described armature winding NJ1 is electrically connected with one end of described armature winding NJ2 and one end of described electric capacity CJ1 respectively, the other end and the described starter J of described electric capacity CJ1 are electrically connected, the other end of described armature winding NJ2 is electrically connected by described electric capacity CJ2 and described starter J.
5. the digital control circuit of electronic ballast of HID light without electrolytic capacitor according to claim 1 and 2, is characterized in that: also comprise electromagnetic interface filter, and the output of described electromagnetic interface filter and AC power UIN is electrically connected.
6. the digital control circuit of electronic ballast of HID light without electrolytic capacitor according to claim 1 and 2, is characterized in that: also comprise light modulation toning circuit, described light modulation toning circuit and described MCU are electrically connected.
7. the digital control circuit of electronic ballast of HID light without electrolytic capacitor according to claim 1 and 2, is characterized in that: also comprise protective circuit, and described protective circuit and described MCU are electrically connected.
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| CN201510403414.3A CN104968135B (en) | 2015-07-11 | 2015-07-11 | The digital control circuit of electronic ballast of HID light without electrolytic capacitor |
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| CN201510403414.3A CN104968135B (en) | 2015-07-11 | 2015-07-11 | The digital control circuit of electronic ballast of HID light without electrolytic capacitor |
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| CN105050261A (en) * | 2015-07-13 | 2015-11-11 | 南宁常萌电子科技有限公司 | Numerical control method of pure-solid new HID lamp's electronic ballast and circuit |
| CN109714879A (en) * | 2018-12-13 | 2019-05-03 | 南京铁道职业技术学院 | A kind of novel HID ballast |
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| CN104968135B (en) | 2017-09-08 |
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