CN103476192B - Three-phase load control circuit capable of boosting voltage - Google Patents
Three-phase load control circuit capable of boosting voltage Download PDFInfo
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- CN103476192B CN103476192B CN201310355424.5A CN201310355424A CN103476192B CN 103476192 B CN103476192 B CN 103476192B CN 201310355424 A CN201310355424 A CN 201310355424A CN 103476192 B CN103476192 B CN 103476192B
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Abstract
The invention provides a three-phase load control circuit capable of boosting voltage. The three-phase load control circuit comprises a control circuit and a voltage regulating circuit, wherein the control circuit comprises a PLC, corner connection relays and a plurality of voltage regulating relays; the voltage regulating circuit comprises loads and a three-phase coupling transformer; the two ends of each secondary coil of the three-phase autotransformer are respectively connected with a three-phase input end and a neutral wire input end; a plurality of taps of the secondary coils are respectively connected in series with the neutral ends of the loads through the plurality of voltage regulating relays; and three contacts of each corner connection relay are connected between every two loads. By adopting the three-phase load control circuit capable of boosting voltage, the disadvantage that a conventional energy-saving controller is only capable of bucking and is incapable of boosting can be overcome, when the voltage of an electrical network is normal, the voltage at the two ends of each load can be lowered for realizing the purpose of energy conservation, and when the voltage of the electrical network is quite low, the voltage at the two ends of each load can be increased so that the normal starting of a high-voltage gas discharge lamp can be realized.
Description
Technical field
The present invention relates to lighting control technique field, refer in particular to a kind of three-phase load control circuit that can boost.
Background technology
Along with the development of city illumination and Landscape Lighting, power consumption problem is more and more subject to the attention of country and government.Many cities and area are because facing electric hypodynamic problem, often street lamp is adopted and carry out saves energy every the control mode that small cup is turned off the light or midnight turns off the light, but although the object of energy-saving and emission-reduction can be reached like this, often cause road lighting uneven, easily cause the generation of traffic accident.
At present, the illumination of road, tunnel and view all adopts high-voltage gas discharging light (High intensity Discharge usually, be abbreviated as HID), by the arc discharge in fluorescent tube, then produce very strong light in conjunction with the inert gas of filling in fluorescent tube or metallic vapour.Existing conventional high-voltage gas discharging light has high-pressure sodium lamp, high-pressure mercury lamp, xenon lamp, metal halide lamp etc.
After high-voltage gas discharging light access voltage, electric arc is produced between electric arc tube two end electrodes, high temperature action due to electric arc makes the material in pipe be heated and flashes to steam, the electricity of cathode emission is in anode motion process, clash into discharging substance and have atom, make it obtain energy generation ionization to excite, be then returned to stable state by excitation state.In order to ensure the normal starter of high-voltage gas discharging light, needing high-voltage gas discharging light two ends to maintain in rated voltage state and maintaining a period of time.Be subject to the operation principle restriction of high-voltage gas discharging light, when electrical network is lower, what just may cause high-voltage gas discharging light cannot normal ignition.Therefore adopt traditional energy saver, output end voltage is all equal to or less than input terminal voltage.
The Energy Saving Control of high-voltage gas discharging light adopts regulation voltage device and electronic ballast usually: regulation voltage device adopts autotransformer usually, utilize the voltage tap of relay or contactless switching device regulating load end, to reach the regulatory function of the both end voltage of light fixture; Electronic ballast can very simply by various automatic control realization to the intelligentized control method of light, what can meet illumination can control overflow, also can save a large amount of electric power, but electronic ballast price is high and stability not enough, therefore less employing in actual applications.
The patent of invention file that publication date is on 09 14th, 2011, publication number is CN102186299A discloses a kind of lighting saving device, relate to Street lamps control technical field, be provided with the sky be connected with power supply to open, the other end that sky is opened is connected on the input of autotransformer and the input of bypass contactor, and the gear output of autotransformer is connected a thermal relay respectively with the output of bypass contactor.This invention make use of relay and autotransformer, but only can reach step-down, and can not realize Based Intelligent Control.
Summary of the invention
In order to solve existing streetlight control circuit can only step-down energy-conservation and cannot normal ignition high-voltage gas discharging light or the problem of the normal lumen of high-voltage gas discharging light can not be ensured when line voltage is lower, the present invention proposes a kind of three-phase load control circuit that can boost, not only can when line voltage be normal, energy-conservation object is reached by reducing high-voltage gas discharging light both end voltage, also can when line voltage be lower, raise high-voltage gas discharging light both end voltage, the normal lumen starting high-voltage gas discharging light or increase high-voltage gas discharging light.
The technical solution adopted in the present invention is: a kind of three-phase load control circuit that can boost, comprise control circuit and regulating circuit, described control circuit comprises PLC and several relays, relay comprises a corner connection relay and several Voltage regulating relay, each relay all comprises control coil and the first contact, second contact and the 3rd contact, described PLC is provided with two power ends, several inputs and several outputs, two power ends of PLC connect A phase incoming end and neutral line input respectively, each output of PLC is connected to neutral line input respectively by the control coil of corner connection relay Voltage regulating relay, described regulating circuit comprises load and coupling transformer, described load comprises A phase load, B phase load and C phase load, described coupling transformer is provided with three secondary coils containing several taps, be respectively the secondary coil Ta connecing end a and neutral line input mutually connecting A phase load, connect B phase load connect hold mutually the secondary coil Tb of b and neutral line input be connected C phase load meet the secondary coil Tc holding c and neutral line input mutually, the number of taps of each secondary coil is consistent with the quantity of Voltage regulating relay, the tap of secondary coil Ta respectively by the first contact series of each Voltage regulating relay to the neutral end a1 of A phase load, the tap of secondary coil Tb respectively by the second contact series of each Voltage regulating relay to the neutral end b1 of B phase load, the tap of secondary coil Tc respectively by the 3rd contact series of each Voltage regulating relay to the neutral end c1 of C phase load, between the neutral end c1 connecing end a and C phase load mutually of A phase load, the neutral end a1 of A phase load holds between b with connecing of B phase load mutually, the neutral end b1 of B phase load connects three contacts of holding mutually and being in series with corner connection relay between c respectively with C phase load.
Instant invention overcomes traditional energy-saving controller for street lamp can only step-down and the shortcoming that can not boost, provide a kind of threephase load voltage control circuit that can boost, when line voltage is normal, by the different taps of secondary coil secondary are linked into the voltage that load reduces load two ends, reach energy-conservation object, and when electrical network is lower, load voltage can be improved, the normal work of proof load.The present invention is mainly used in the larger occasion of voltage ripple of power network, or the occasion higher to voltage request.
As preferably, connecing of A phase load is held mutually, the connecing of end and C phase load mutually that connect of B phase load holds the master switch QF by controlling three-phase break-make to be simultaneously connected the A phase incoming end of three-phase alternating current, B phase incoming end and C phase incoming end mutually.Master switch QF as the master switch of whole circuit, can be responsible for the connection being switched on or switched off load and electric power system.
As preferably, also comprise photosensitive sensors, described photosensitive sensors is electrically connected with one of them input of PLC.PLC can according to the feedback information of the photosensitive sensors received, and control load lamp produces different brightness or carries out switching manipulation.
As preferably, also comprise voltage sensor, described voltage sensor is electrically connected with one of them input of PLC.PLC can according to the feedback information of the voltage sensor received, and control load lamp produces different brightness or carries out switching manipulation.
As preferably, also comprise driving transducer, described driving transducer is electrically connected with one of them input of PLC.PLC can according to the feedback information of the driving transducer received, and control load lamp produces different brightness or carries out switching manipulation.
The invention has the beneficial effects as follows: not only can when line voltage is normal, energy-conservation object is reached by reducing high-voltage gas discharging light both end voltage, also can when line voltage be lower, raise high-voltage gas discharging light both end voltage, the normal lumen starting high-voltage gas discharging light or increase high-voltage gas discharging light.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of a kind of main circuit of the present invention;
Fig. 2 is the circuit diagram of PLC part of the present invention.
In figure, U1-PLC controller, L1-A phase load, L2-B phase load, L3-C phase load, KM1-first Voltage regulating relay, KM2-second Voltage regulating relay, KM3-the 3rd Voltage regulating relay, KM4-the 4th Voltage regulating relay, KM5-star contact relay, KM6-corner connection relay, A-A phase incoming end, B-B phase incoming end, C-C phase incoming end, N-neutral line input, connecing of a-A phase load is held mutually, connecing of b-B phase load is held mutually, and connecing of c-C phase load is held mutually, the neutral end of a1-A phase load, the neutral end of b1-B phase load, the neutral end of c1-C phase load.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
Based on a load control circuit for autotransformer, comprise control circuit and regulating circuit.Control circuit comprises PLC U1 and 6 relay, as shown in Figure 2, relay comprises corner connection relay K M6 and five Voltage regulating relay---and the first Voltage regulating relay KM1, the second Voltage regulating relay KM2, the 3rd Voltage regulating relay KM3, the 4th Voltage regulating relay KM4 and the 5th Voltage regulating relay KM5, each relay all has control coil and the first contact, the second contact and the 3rd contact.PLC U1 is provided with two power ends, 3 inputs and 6 outputs, two power ends of PLC U1 connect A phase input and neutral line input N respectively, 6 outputs of PLC are respectively by corner connection relay K M6, first Voltage regulating relay KM1, second Voltage regulating relay KM2, 3rd Voltage regulating relay KM3, the control coil of the 4th Voltage regulating relay KM4 and the 5th Voltage regulating relay KM5 is connected to neutral line input N, 3 inputs connect photosensitive sensors respectively, driving transducer and voltage sensor, PLC U1 can according to the feedback information of each transducer received, control load lamp produces different brightness or carries out switching manipulation.
As shown in Figure 1, regulating circuit comprises load and coupling transformer, and load comprises A phase load L1, B phase load L2 and C phase load L3, and A phase load L1, B phase load L2 and C phase load L3 can be high-voltage gas discharging light, also can be other lighting loads, also can be non-lighting load.Connecing of A phase load is held between the neutral end c1 of a and C phase load mutually, neutral end a1 and the connecing of B phase load of A phase load are held between b mutually, the neutral end b1 of B phase load and C phase load connect three contacts of holding mutually and being in series with corner connection relay K M6 between c respectively.When contact KM6_1, KM6_2 and KM6_3 of corner connection relay K M6 are all closed, threephase load is with the form of corner connection access electrical network, the voltage at every phase load two ends is the line voltage of electrical network, now requires that each contact of the first Voltage regulating relay KM1, the second Voltage regulating relay KM2, the 3rd Voltage regulating relay KM3, the 4th Voltage regulating relay KM4 and the 5th Voltage regulating relay KM5 remains open state.
Coupling transformer is provided with three secondary coils containing five taps, be respectively secondary coil Ta, secondary coil Tb and secondary coil Tc, secondary coil Ta two ends connect A phase input and neutral line input respectively, four taps of Ta are respectively by the first contact KM1_1 of the first Voltage regulating relay KM1, the first contact KM2_1 of the second Voltage regulating relay KM2, the first contact KM3_1 of the 3rd Voltage regulating relay KM3, the first contact KM4_1 of the 4th Voltage regulating relay KM4, the first contact KM5_1 of the 5th Voltage regulating relay KM5 is connected to connecing of A phase load and holds a mutually, secondary coil Tb two ends connect B phase input and neutral line input respectively, four taps of Tb are respectively by the second contact KM1_2 of the first Voltage regulating relay KM1, the second contact KM2_2 of the second Voltage regulating relay KM2, the second contact KM3_2 of the 3rd Voltage regulating relay KM3, the second contact KM4_2 of the 4th Voltage regulating relay KM4, the second contact KM5_2 of the 5th Voltage regulating relay KM5 is connected to connecing of B phase load and holds b mutually, secondary coil Tc two ends connect C phase input and neutral line input respectively, four taps of Tc are respectively by the 3rd contact KM1_3 of the first Voltage regulating relay KM1, the first contact KM2_3 of the second Voltage regulating relay KM2, the first contact KM3_3 of the 3rd Voltage regulating relay KM3, the first contact KM4_3 of the 4th Voltage regulating relay KM4, the 3rd contact KM5_3 of the 5th Voltage regulating relay KM5 is connected to connecing of C phase load and holds c mutually.Each different tap has different secondary voltage, therefore by different taps access load, and also just can the voltage at control load two ends.These five groups of switches can only have one group of switch to close, and when there being one group of switch to close, other switches will be in off-state.Therefore, will realize blocking function facing to four groups of control switchs in the controller, namely when one group of switch closes, other switches cannot close.
During use, when load is high-voltage gas discharging light, by the connected mode of transformation load or select different secondary coil tap, not only can when line voltage be normal, energy-conservation object is reached by reducing high-voltage gas discharging light both end voltage, also when line voltage is lower, high-voltage gas discharging light both end voltage can be raised, the normal lumen starting high-voltage gas discharging light or increase high-voltage gas discharging light.Equally, other loads are also applicable to.
Above embodiment is only and technological thought of the present invention is described, can not limit protection scope of the present invention with this, and every technological thought proposed according to the present invention, any change that technical scheme basis is done, all falls within protection scope of the present invention.
Claims (5)
1. the three-phase load control circuit that can boost, it is characterized in that: comprise control circuit and regulating circuit, described control circuit comprises PLC and several relays, relay comprises a corner connection relay and several Voltage regulating relay, each relay all comprises control coil and the first contact, second contact and the 3rd contact, described PLC is provided with two power ends, several inputs and several outputs, two power ends of PLC connect A phase incoming end and neutral line input respectively, each output of PLC is connected to neutral line input respectively by the control coil of corner connection relay Voltage regulating relay,
Described regulating circuit comprises load and coupling transformer, described load comprises A phase load, B phase load and C phase load, between the neutral end c1 connecing end a and C phase load mutually of A phase load, the neutral end a1 of A phase load holds between b with connecing of B phase load mutually, the neutral end b1 of B phase load connects three contacts of holding mutually and being in series with corner connection relay between c respectively with C phase load, described coupling transformer is provided with three secondary coils containing several taps, be respectively the secondary coil Ta connecing end a and neutral line input mutually connecting A phase load, connect B phase load connect hold mutually the secondary coil Tb of b and neutral line input be connected C phase load meet the secondary coil Tc holding c and neutral line input mutually, the number of taps of each secondary coil is consistent with the quantity of Voltage regulating relay, the tap of secondary coil Ta respectively by the first contact series of each Voltage regulating relay to the neutral end a1 of A phase load, the tap of secondary coil Tb respectively by the second contact series of each Voltage regulating relay to the neutral end b1 of B phase load, the tap of secondary coil Tc respectively by the 3rd contact series of each Voltage regulating relay to the neutral end c1 of C phase load.
2. the three-phase load control circuit that can boost according to claim 1, is characterized in that: connecing of A phase load is held mutually, the end mutually that connects of B phase load holds the master switch QF by controlling three-phase break-make to be simultaneously connected the A phase incoming end of three-phase alternating current, B phase incoming end and C phase incoming end with connecing of C phase load mutually.
3. the three-phase load control circuit that can boost according to claim 1, is characterized in that: also comprise photosensitive sensors, and described photosensitive sensors is electrically connected with one of them input of PLC.
4. the three-phase load control circuit that can boost according to claim 1, is characterized in that: also comprise voltage sensor, and described voltage sensor is electrically connected with one of them input of PLC.
5. the three-phase load control circuit that can boost according to claim 1, is characterized in that: also comprise driving transducer, described driving transducer is electrically connected with one of them input of PLC.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310355424.5A CN103476192B (en) | 2013-08-15 | 2013-08-15 | Three-phase load control circuit capable of boosting voltage |
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| CN201310355424.5A CN103476192B (en) | 2013-08-15 | 2013-08-15 | Three-phase load control circuit capable of boosting voltage |
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| CN103476192B true CN103476192B (en) | 2015-04-15 |
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| CN104486897A (en) * | 2014-11-19 | 2015-04-01 | 宋宏伟 | Voltage regulation control device for inductive ballast |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61182116A (en) * | 1985-02-06 | 1986-08-14 | Nippon Electric Ind Co Ltd | 3-phase automatic voltage controller |
| US6046549A (en) * | 1997-09-29 | 2000-04-04 | U.S. Energy, Inc. | Energy saving lighting controller |
| CN101384118A (en) * | 2008-10-18 | 2009-03-11 | 六安新宇节能科技有限公司 | Intelligent road lamp controller |
| CN201995161U (en) * | 2010-12-03 | 2011-09-28 | 六安新宇节能科技有限公司 | Intelligent automatic energy-saving controller for three-phase streetlamps |
| CN203399383U (en) * | 2013-08-15 | 2014-01-15 | 杭州碧创科技有限公司 | Three-phase load control circuit capable of boosting voltage |
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2013
- 2013-08-15 CN CN201310355424.5A patent/CN103476192B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61182116A (en) * | 1985-02-06 | 1986-08-14 | Nippon Electric Ind Co Ltd | 3-phase automatic voltage controller |
| US6046549A (en) * | 1997-09-29 | 2000-04-04 | U.S. Energy, Inc. | Energy saving lighting controller |
| CN101384118A (en) * | 2008-10-18 | 2009-03-11 | 六安新宇节能科技有限公司 | Intelligent road lamp controller |
| CN201995161U (en) * | 2010-12-03 | 2011-09-28 | 六安新宇节能科技有限公司 | Intelligent automatic energy-saving controller for three-phase streetlamps |
| CN203399383U (en) * | 2013-08-15 | 2014-01-15 | 杭州碧创科技有限公司 | Three-phase load control circuit capable of boosting voltage |
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