CN104780672A - Push-and-pull trigger type smart grid variable-frequency and energy-saving control system - Google Patents
Push-and-pull trigger type smart grid variable-frequency and energy-saving control system Download PDFInfo
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- CN104780672A CN104780672A CN201510146020.4A CN201510146020A CN104780672A CN 104780672 A CN104780672 A CN 104780672A CN 201510146020 A CN201510146020 A CN 201510146020A CN 104780672 A CN104780672 A CN 104780672A
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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
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The invention discloses a push-and-pull trigger type smart grid variable-frequency and energy-saving control system. The control system mainly comprises an EMI (electromagnetic interference) filter (1), a bridge rectifier (2) connected with the EMI filter (1), a boost type active power factor correction circuit (3) connected with the bridge rectifier (2), a high-frequency DC/AC converter (4) connected with the boost type active power factor correction circuit (3) and the like. The control system is simpler in overall structure and higher in stability and reliability, besides, a triode parallel compensation circuit replaces a traditional compensation capacitor, the size of the control system can be greatly reduced, and the power factor of the whole control system can be increased to a great extent, so that the stability of the system is guaranteed.
Description
Technical field
The present invention relates to electrical network energy-saving field, specifically refer to a kind of push-and-pull trigger-type intelligent grid energy saving control system of frequency conversion in use.
Background technology
At present, along with the development of urbanization and the raising of living standards of the people, the electric energy that city illumination consumes is that geometry radix increases, and reduce discharging the call of policy to respond national energy-saving, the concept of intelligent grid more and more obtains everybody accreditation.Intelligent grid is exactly the intellectuality of electrical network, is also referred to as " electrical network 2.0 ", and it is the technology application be based upon on integrated, high-speed bidirectional communication network basis, can realize the target of reliable, safety, the economy of electrical network, efficient, environmental friendliness and use safety.
Energy-saving and frequency-variable street lamp is a significant element of composition intelligent grid, and the energy-conservation major embodiment of energy-saving and frequency-variable street lamp on the controller, the controller overwhelming majority now commercially used or traditional inductance type ballast, and inductance type ballast also exists following shortcomings: 1, power factor is very low, add building-out capacitor, generally also can only reach about 0.85, this makes same power need larger supply electric current, have to increase the capacity of special change (street-lighting transformer), increase the diameter of service cable, cost is increased; 2, under inductance type ballast is operated in mains frequency, silicon steel sheet must be used in a large number, and the material making silicon steel sheet is scarce resource, is unfavorable for the protection of environmental protection and scarce resource; 3, the power that inductance type ballast consumes increases along with the increase of input voltage, does not have defencive function in addition, therefore when fluorescent tube open circuit or short circuit, easily damages ballast and annex thereof.
In sum, the energy-saving and frequency-variable controller for road lamp in current intelligent grid frequency conversion energy-saving system can not effectively realize energy-conservation object.
Summary of the invention
The object of the invention is to overcome and can not effectively realize energy-conservation defect in current intelligent grid frequency conversion energy-saving system existing for energy-saving and frequency-variable controller for road lamp, a kind of push-and-pull trigger-type intelligent grid energy saving control system of frequency conversion in use is provided.
The following technical scheme of object of the present invention realizes: a kind of push-and-pull trigger-type intelligent grid energy saving control system of frequency conversion in use, primarily of electromagnetic interface filter, the bridge rectifier be connected with electromagnetic interface filter, the boost type active power factor correction circuit be connected with bridge rectifier, the DC/AC high-frequency converter be connected with boost type active power factor correction circuit, the sampling protective circuit be connected with this DC/AC high-frequency converter and pulse generation drive circuit, and the single-chip microcomputer be connected with pulse generation drive circuit with sampling protective circuit respectively forms, simultaneously, also be provided with the parallel compensating circuit of triode and the saturated circuits for triggering of push-and-pull, the input of the parallel compensating circuit of described triode is connected with the output of boost type active power factor correction circuit with DC/AC high-frequency converter respectively, and its output is then connected with sampling protective circuit after the saturated circuits for triggering of push-and-pull, the parallel compensating circuit of described triode is by voltage source V, be serially connected in the adjustable bridge circuit between the positive pole of voltage source V and negative pole, the triode power amplification circuit be connected with adjustable bridge circuit, and form with the triode feedback circuit that adjustable bridge circuit and triode power amplification circuit are all connected, the saturated circuits for triggering of described push-and-pull are then by triode Q4, triode Q5, collector electrode is connected with the base stage of triode Q4, its grounded emitter, and its base stage is in turn through triode Q6 that diode D7 is connected with the collector electrode of triode Q5 after inductance L 6, collector electrode is connected with the base stage of triode Q5, its grounded emitter, and its base stage is in turn through triode Q7 that diode D6 is connected with the collector electrode of triode Q4 after inductance L 1, one end is connected with the collector electrode of triode Q6, the other end is in turn through inductance L 4, diode D4 and the resistance R14 be connected with the collector electrode of triode Q5 after resistance R13, one end is connected with the collector electrode of triode Q7, the other end is in turn through inductance L 3, diode D3 and the resistance R15 be connected with the collector electrode of triode Q4 after resistance R12, P pole is connected with the tie point of diode D3 with resistance R12, N pole is the diode D2 of external-4V voltage after inductance L 2 then, and P pole is connected with the tie point of diode D4 with resistance R13, N pole then after inductance L 5 the diode D5 of external-4V voltage form, the emitter of described triode Q4 and the emitter of triode Q5 then all external+4V voltage.
Further, described adjustable bridge circuit is connected in series resistance R3, the resistance R5, the resistance R6 and resistance R4 that form electric loop in turn by head and the tail, and the resistance R1 that one end is connected with the tie point of resistance R4 with resistance R3, the other end is connected with triode power amplification circuit after adjustable resistance R2 forms; The adjustable side of described adjustable resistance R2 is then connected with the tie point of resistance R5 with resistance R3; Described resistance R4 is connected with triode feedback circuit with the positive pole of voltage source V respectively with the tie point of resistance R6, resistance R5 is then connected with triode power amplification circuit with the tie point of resistance R6, and resistance R3 is also connected with the negative pole of voltage source V with the tie point of resistance R5.
Described triode power amplification circuit is by triode Q1, power amplifier P1, be serially connected in the resistance R7 between the base stage of triode Q1 and the end of oppisite phase of power amplifier P1, be serially connected in the resistance R8 between the emitter of triode Q1 and the end of oppisite phase of power amplifier P1, the electric capacity C1 be in parallel with resistance R8, and the polar capacitor C2 be serially connected between the in-phase end of power amplifier P1 and output forms; The in-phase end of described power amplifier P1 is then connected with the tie point of resistance R6 with resistance R5, and its output is then connected with triode feedback circuit.
Described triode feedback circuit is by triode Q2, triode Q3, power amplifier P2, the diode D1 that P pole is connected with the emitter of triode Q2, N pole is connected with the output of power amplifier P2, be serially connected in the resistance R9 between the in-phase end of power amplifier P2 and output, and the resistance R10 that one end is connected with the emitter of triode Q2, the other end is connected with the output of power amplifier P2 after resistance R11 forms; The collector electrode of described triode Q2 is connected with the end of oppisite phase of power amplifier P2, and its base stage is then connected with the tie point of resistance R6 with resistance R4, and its emitter is also connected with the collector electrode of triode Q3; The collector electrode of triode Q3 is connected with the output of power amplifier P1, and its base stage is then connected with the tie point of resistance R11 with resistance R10, its grounded emitter; The in-phase end of described power amplifier P2 is connected with the output of boost type active power factor correction circuit with DC/AC high-frequency converter respectively, and the base stage of triode Q3 is then connected with the collector electrode of triode Q6.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) overall structure of the present invention is comparatively simple, and its Stability and dependability is stronger.
(2) the parallel compensating circuit of the present invention's triode instead of traditional building-out capacitor, can not only reduce the volume of control system greatly, and can also increase the power factor (PF) of whole control system significantly, thus guarantees the stable of system.
(3) the present invention when short circuit or open circuit, can guarantee the safety of whole control system by the parallel compensating circuit of triode.
(4) saturated for push-and-pull circuits for triggering and the parallel compensating circuit of triode are integrated use by the present invention, can reduce the energy consumption of whole system greatly, can effectively guarantee its stability.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
Fig. 2 is the electrical block diagram of the parallel compensating circuit of triode of the present invention.
Fig. 3 is the saturated trigger circuit structure schematic diagram of push-and-pull of the present invention.
Wherein, the Reference numeral title in above accompanying drawing is respectively:
1-electromagnetic interface filter, 2-bridge rectifier, 3-boost type active power factor correction circuit; 4-DC/AC high-frequency converter, the parallel compensating circuit of 5-triode, 6-sampling protective circuit; 7-single-chip microcomputer, 8-pulse generation drive circuit, the saturated circuits for triggering of 9-push-and-pull.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment
As shown in Figure 1, the present invention mainly includes electromagnetic interface filter 1, bridge rectifier 2, boost type active power factor correction circuit 3, DC/AC high-frequency converter 4, the parallel compensating circuit of triode 5, this nine major part of sampling protective circuit 6, single-chip microcomputer 7, pulse generation drive circuit 8 and the saturated circuits for triggering 9 of push-and-pull.
Wherein, sampling protective circuit 6 is for passing to single-chip microcomputer 7 by the voltage at energy-conserving road lamp two ends and through the sampled result of the electric current of energy-conserving road lamp, single-chip microcomputer 7 control impuls generation drive circuit 8 sends lights drive waveforms or normal task driven waveform to DC/AC high-frequency converter 4, the direct current of the 400V boosted through boost type active power factor correction circuit 3 is become the alternating current of high frequency by this DC/AC high-frequency converter 4 under the driving of high-frequency impulse, when starting, instantaneous high pressure is produced by the parallel compensating circuit 5 of triode, energy-conserving road lamp is lighted, and single-chip microcomputer 7 is according to the data of sampling protective circuit 6 Real-time Collection, according to Different periods predetermined power size adjust energy-conserving road lamp at day part constant power operations.
Described electromagnetic interface filter 1 enters product for preventing the high order harmonic component of electrical network, prevents the high order harmonic component of product itself from returning electrical network, and pollutes electrical network, make product meet national safety standard, meet corresponding laws and regulations.Bridge rectifier 2 is for becoming civil power 220V the pulse direct current of about 310V; Boost type active circuit of power factor correction 3, for the power factor of improving product complete machine, makes power factor reach more than 0.98, reduces the power supply burden of electrical network.Sampling protective circuit 6 is conventional circuit structure, and it is for the operating state of energy-conserving road lamp of sampling, and the data of sampling are delivered to single-chip microcomputer 7, and single-chip microcomputer 7 carries out judging that whether energy-conserving road lamp is in normal work, and the result according to judging determines whether taking safeguard measure; If normally work, then according to sampled data, adjust the operating frequency of product, and then control the constant of power output, realize invariable power and the intelligent dimming function of product.
During operation, single-chip microcomputer 7 is according to the driving pulse of sampled data adjustment pulse generation drive circuit 8, and this driving pulse, through isolating, amplifying the inverter circuit being supplied to DC/AC high-frequency converter 4, makes power tube work in high frequency, thus makes lamp luminous.And DC/AC high-frequency converter 4 is under the driving of high-frequency impulse, the direct current of 400V is become the alternating current of high frequency.
In order to ensure result of use of the present invention, the present invention specially devises the parallel compensating circuit of triode 5 and the saturated circuits for triggering 9 of push-and-pull.Wherein, the concrete structure of the parallel compensating circuit 5 of triode as shown in Figure 2.Namely, the parallel compensating circuit 5 of this triode is by voltage source V, be serially connected in the adjustable bridge circuit between the positive pole of voltage source V and negative pole, the triode power amplification circuit be connected with adjustable bridge circuit, and form with the triode feedback circuit that adjustable bridge circuit and triode power amplification circuit are all connected.
Wherein, adjustable bridge circuit is connected in series resistance R3, the resistance R5, the resistance R6 and resistance R4 that form electric loop in turn by head and the tail, and the resistance R1 that one end is connected with the tie point of resistance R4 with resistance R3, the other end is connected with triode power amplification circuit after adjustable resistance R2 forms.Simultaneously, the adjustable side of adjustable resistance R2 is connected with the tie point of resistance R5 with resistance R3, resistance R4 is then connected with triode feedback circuit with the positive pole of voltage source V respectively with the tie point of resistance R6, resistance R5 is then connected with triode power amplification circuit with the tie point of resistance R6, and resistance R3 is also connected with the negative pole of voltage source V with the tie point of resistance R5.That is, the tie point of the tie point of resistance R3 and resistance R5, and resistance R4 and resistance R6 is as the power input of adjustable bridge circuit, and it is connected with positive pole with the negative pole of voltage source V respectively; And the tie point of resistance R3 and resistance R4, and the tie point of resistance R5 and resistance R6 is then the output of this adjustable bridge circuit.Therefore, the electric loop that voltage source V just forms with resistance R3, resistance R4, resistance R6 and resistance R5 forms parallel circuits.
Described triode power amplification circuit is by triode Q1, and power amplifier P1, resistance R7, resistance R8, electric capacity C1 and polar capacitor C2 form.During connection, resistance R7 is serially connected between the base stage of triode Q1 and the end of oppisite phase of power amplifier P1, resistance R8 is serially connected between the emitter of triode Q1 and the end of oppisite phase of power amplifier P1, electric capacity C1 is then in parallel with resistance R8, between the in-phase end that polar capacitor C2 is then serially connected in power amplifier P1 and output.The in-phase end of power amplifier P1 is then connected with the tie point of resistance R6 with resistance R5, and its output is then connected with triode feedback circuit.
Described triode feedback circuit is then by triode Q2, and triode Q3, power amplifier P2, diode D1, resistance R9, resistance R10 and resistance R11 form.During connection, the P pole of diode D1 is connected with the emitter of triode Q2, and its N pole is connected with the output of power amplifier P2; Between the in-phase end that resistance R9 is then serially connected in power amplifier P2 and output, one end of resistance R10 is connected with the emitter of triode Q2, the other end is connected with the output of power amplifier P2 after resistance R11.Meanwhile, the collector electrode of triode Q2 is connected with the end of oppisite phase of power amplifier P2, and its base stage is then connected with the tie point of resistance R6 with resistance R4, and its emitter is also connected with the collector electrode of triode Q3; The collector electrode of triode Q3 is connected with the output of power amplifier P1, and its base stage is then connected with the tie point of resistance R11 with resistance R10, its grounded emitter.
The in-phase end of power amplifier P2 draws the input forming the parallel compensating circuit of this triode, and the base stage of triode Q3 then forms the output of the parallel compensating circuit of this triode.During connection, the base stage of triode Q3 will be connected with the input of the saturated circuits for triggering of push-and-pull, to guarantee that the correcting controlling signal that boost type active power factor correction circuit 3 sends can impel triode Q3 conducting, and then start the parallel compensating circuit 5 of this triode.And the signal received by the parallel compensating circuit 5 of this triode is after triode power amplification circuit and the acting in conjunction of triode feedback circuit; its feedback signal then exports to sampling protective circuit 6 through the saturated circuits for triggering 9 of push-and-pull, thus realizes compensate function and Trigger Function.The in-phase end of power amplifier P2 then needs to be connected with the output of boost type active power factor correction circuit 3 with DC/AC high-frequency converter 4 respectively.For guaranteeing result of use of the present invention, the resistance of described resistance R3: the resistance of the resistance=resistance R4 of resistance R6: the resistance of resistance R5.
The particular circuit configurations of the saturated circuits for triggering 9 of push-and-pull as shown in Figure 3, namely it is by triode Q4, triode Q5, triode Q6, triode Q7, resistance R12, resistance R13, resistance R14, resistance R15, diode D2, diode D3, diode D4, diode D5, diode D6, diode D7, and inductance L 1, inductance L 2, inductance L 3, inductance L 4, inductance L 5 and inductance L 6 form.
During connection, the collector electrode of described triode Q6 is connected with the base stage of triode Q4, its grounded emitter, and its base stage is connected with the collector electrode of triode Q5 after inductance L 6 through diode D7 in turn; The collector electrode of triode Q7 is connected with the base stage of triode Q5, its grounded emitter, and its base stage is then connected with the collector electrode of triode Q4 after inductance L 1 through diode D6 in turn.
Meanwhile, one end of resistance R14 is connected with the collector electrode of triode Q6, and its other end is connected with the collector electrode of triode Q5 after resistance R13 through inductance L 4, diode D4 in turn; And one end of resistance R15 is connected with the collector electrode of triode Q7, its other end is connected with the collector electrode of triode Q4 after resistance R12 through inductance L 3, diode D3 in turn.
The P pole of described diode D2 is connected with the tie point of diode D3 with resistance R12, and its N pole is external-4V voltage after inductance L 2 then; The P pole of diode D5 is connected with the tie point of diode D4 with resistance R13, and its N pole is external-4V voltage after inductance L 5 then.For guaranteeing effect, the emitter of described triode Q4 and the emitter of triode Q5 then all external+4V voltage.Wherein, inductance L 1 and inductance L 2 form a mutual inductance circuit, and inductance L 5 and inductance L 6 form a mutual inductance circuit.For guaranteeing its push-and-pull effect, this inductance L 1 is 1:2 with the turn ratio of inductance L 2, and inductance L 6 is also 1:2 with the turn ratio of inductance L 5.
As mentioned above, just well the present invention can be realized.
Claims (4)
1. a push-and-pull trigger-type intelligent grid energy saving control system of frequency conversion in use, primarily of electromagnetic interface filter (1), the bridge rectifier (2) be connected with electromagnetic interface filter (1), the boost type active power factor correction circuit (3) be connected with bridge rectifier (2), the DC/AC high-frequency converter (4) be connected with boost type active power factor correction circuit (3), the sampling protective circuit (6) be connected with this DC/AC high-frequency converter (4) and pulse generation drive circuit (8), and the single-chip microcomputer (7) be connected with pulse generation drive circuit (8) with sampling protective circuit (6) respectively forms, it is characterized in that, also be provided with the parallel compensating circuit of triode (5) and the saturated circuits for triggering of push-and-pull (9), the input of the parallel compensating circuit of described triode (5) is connected with the output of boost type active power factor correction circuit (3) with DC/AC high-frequency converter (4) respectively, and its output is then connected with sampling protective circuit (6) after the saturated circuits for triggering of push-and-pull (9), the parallel compensating circuit of described triode (5) is by voltage source V, be serially connected in the adjustable bridge circuit between the positive pole of voltage source V and negative pole, the triode power amplification circuit be connected with adjustable bridge circuit, and form with the triode feedback circuit that adjustable bridge circuit and triode power amplification circuit are all connected, the saturated circuits for triggering of described push-and-pull (9) are then by triode Q4, triode Q5, collector electrode is connected with the base stage of triode Q4, its grounded emitter, and its base stage is in turn through triode Q6 that diode D7 is connected with the collector electrode of triode Q5 after inductance L 6, collector electrode is connected with the base stage of triode Q5, its grounded emitter, and its base stage is in turn through triode Q7 that diode D6 is connected with the collector electrode of triode Q4 after inductance L 1, one end is connected with the collector electrode of triode Q6, the other end is in turn through inductance L 4, diode D4 and the resistance R14 be connected with the collector electrode of triode Q5 after resistance R13, one end is connected with the collector electrode of triode Q7, the other end is in turn through inductance L 3, diode D3 and the resistance R15 be connected with the collector electrode of triode Q4 after resistance R12, P pole is connected with the tie point of diode D3 with resistance R12, N pole is the diode D2 of external-4V voltage after inductance L 2 then, and P pole is connected with the tie point of diode D4 with resistance R13, N pole then after inductance L 5 the diode D5 of external-4V voltage form, the emitter of described triode Q4 and the emitter of triode Q5 then all external+4V voltage.
2. a kind of push-and-pull trigger-type intelligent grid energy saving control system of frequency conversion in use according to claim 1, it is characterized in that, described adjustable bridge circuit is connected in series resistance R3, the resistance R5, the resistance R6 and resistance R4 that form electric loop in turn by head and the tail, and the resistance R1 that one end is connected with the tie point of resistance R4 with resistance R3, the other end is connected with triode power amplification circuit after adjustable resistance R2 forms; The adjustable side of described adjustable resistance R2 is then connected with the tie point of resistance R5 with resistance R3; Described resistance R4 is connected with triode feedback circuit with the positive pole of voltage source V respectively with the tie point of resistance R6, resistance R5 is then connected with triode power amplification circuit with the tie point of resistance R6, and resistance R3 is also connected with the negative pole of voltage source V with the tie point of resistance R5.
3. a kind of push-and-pull trigger-type intelligent grid energy saving control system of frequency conversion in use according to claim 2, it is characterized in that, described triode power amplification circuit is by triode Q1, power amplifier P1, be serially connected in the resistance R7 between the base stage of triode Q1 and the end of oppisite phase of power amplifier P1, be serially connected in the resistance R8 between the emitter of triode Q1 and the end of oppisite phase of power amplifier P1, the electric capacity C1 be in parallel with resistance R8, and the polar capacitor C2 be serially connected between the in-phase end of power amplifier P1 and output forms; The in-phase end of described power amplifier P1 is then connected with the tie point of resistance R6 with resistance R5, and its output is then connected with triode feedback circuit.
4. a kind of push-and-pull trigger-type intelligent grid energy saving control system of frequency conversion in use according to claim 3, it is characterized in that, described triode feedback circuit is by triode Q2, triode Q3, power amplifier P2, the diode D1 that P pole is connected with the emitter of triode Q2, N pole is connected with the output of power amplifier P2, be serially connected in the resistance R9 between the in-phase end of power amplifier P2 and output, and the resistance R10 that one end is connected with the emitter of triode Q2, the other end is connected with the output of power amplifier P2 after resistance R11 forms; The collector electrode of described triode Q2 is connected with the end of oppisite phase of power amplifier P2, and its base stage is then connected with the tie point of resistance R6 with resistance R4, and its emitter is also connected with the collector electrode of triode Q3; The collector electrode of triode Q3 is connected with the output of power amplifier P1, and its base stage is then connected with the tie point of resistance R11 with resistance R10, its grounded emitter; The in-phase end of described power amplifier P2 is connected with the output of boost type active power factor correction circuit (3) with DC/AC high-frequency converter (4) respectively, and the base stage of triode Q3 is then connected with the collector electrode of triode Q6.
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| CN201510146020.4A CN104780672A (en) | 2015-03-30 | 2015-03-30 | Push-and-pull trigger type smart grid variable-frequency and energy-saving control system |
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| CN201510146020.4A CN104780672A (en) | 2015-03-30 | 2015-03-30 | Push-and-pull trigger type smart grid variable-frequency and energy-saving control system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR0147437B1 (en) * | 1994-07-02 | 1998-10-01 | 박광래 | Electronic fluorescent lamp ballast circuit |
| CN2571122Y (en) * | 2002-09-17 | 2003-09-03 | 柴国生 | High strength discharge lamp electronic ballast |
| CN101553073A (en) * | 2009-05-12 | 2009-10-07 | 天津博大元通科技有限公司 | Single-phase lighting system power saving device and method thereof |
| CN102933000A (en) * | 2012-11-16 | 2013-02-13 | 张家港市星恒电子节能科技有限公司 | Controller for intelligent power grid variable frequency energy-saving street lamp |
| CN203872389U (en) * | 2014-04-03 | 2014-10-08 | 福建蓝蓝高科技节能技术研究院有限公司 | Smart grid frequency-converting-control energy-saving street lamp |
-
2015
- 2015-03-30 CN CN201510146020.4A patent/CN104780672A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR0147437B1 (en) * | 1994-07-02 | 1998-10-01 | 박광래 | Electronic fluorescent lamp ballast circuit |
| CN2571122Y (en) * | 2002-09-17 | 2003-09-03 | 柴国生 | High strength discharge lamp electronic ballast |
| CN101553073A (en) * | 2009-05-12 | 2009-10-07 | 天津博大元通科技有限公司 | Single-phase lighting system power saving device and method thereof |
| CN102933000A (en) * | 2012-11-16 | 2013-02-13 | 张家港市星恒电子节能科技有限公司 | Controller for intelligent power grid variable frequency energy-saving street lamp |
| CN203872389U (en) * | 2014-04-03 | 2014-10-08 | 福建蓝蓝高科技节能技术研究院有限公司 | Smart grid frequency-converting-control energy-saving street lamp |
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Application publication date: 20150715 |