CN103428981A - Autotransformer based load control circuit - Google Patents
Autotransformer based load control circuit Download PDFInfo
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- CN103428981A CN103428981A CN2013103555055A CN201310355505A CN103428981A CN 103428981 A CN103428981 A CN 103428981A CN 2013103555055 A CN2013103555055 A CN 2013103555055A CN 201310355505 A CN201310355505 A CN 201310355505A CN 103428981 A CN103428981 A CN 103428981A
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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
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Abstract
The invention provides an autotransformer based load control circuit comprising a control circuit and a voltage regulator circuit. The control circuit comprises a PLC (programmable logic controller) and a plurality of relays. The relays include an angle joint relay, a star connection relay and a plurality of voltage regulator relays. The voltage regulator circuit comprises three loads and a three-phase coupling transformer, two ends, of an auxiliary edge coil of the three-phase coupling transformer, are respectively connected with a three-phase input end and a neutral line input end, three contacts of the angle joint relay are connected between every two three loads, another three contactors of the star connection relay are connected between the three loads and the neutral line input end, and the angle joint relay and the star connection relay are in an interlocked structure. By the arrangement, the shortcoming that a traditional energy-saving controller is only capable of reducing voltage rather than boosting is overcome; the voltage at two ends of each load can be reduced to achieve the purpose of energy saving when a grid is normal in power, the voltage at the two ends of each load can be increased when the grid is lower in power, and normal starting and lighting of high intensity gas discharging lamps can be realized.
Description
Technical field
The present invention relates to the control field that throws light on, refer in particular to a kind of load control circuit based on autotransformer.
Background technology
Along with the development of city illumination and Landscape Lighting, the power consumption problem more and more is subject to the attention of country and government.Many cities and area are because facing the problem of power shortage, often street lamp is adopted and carrys out saves energy every the control mode that small cup is turned off the light or turn off the light midnight, although but can reach like this purpose of energy-saving and emission-reduction, tend to cause the road lighting inequality, easily cause the generation of traffic accident.
At present, the illumination of road, tunnel and view all adopts high-voltage gas discharging light (High i1te1sity 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 high-voltage gas discharging light commonly used has high-pressure sodium lamp, high-pressure mercury lamp, xenon lamp, metal halide lamp etc.
After high-voltage gas discharging light access voltage, produce electric arc between the electric arc tube two end electrodes, because being heated material in pipe, the high temperature action of electric arc flashes to steam, the electricity of cathode emission is in the anode motion process, clash into discharging substance atom is arranged, make it obtain power generation ionization and excite, then by excitation state, be returned to stable state.In order to guarantee the normal starter of high-voltage gas discharging light, need the high-voltage gas discharging light two ends maintain at the rated voltage state and maintain a period of time.Be subject to the operation principle restriction of high-voltage gas discharging light, when electrical network is low, what just may cause high-voltage gas discharging light can't normal ignition.Therefore adopt traditional energy saver, output end voltage all is 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: the regulation voltage device adopts autotransformer usually, utilize the voltage tap of relay or contactless switching device regulating load end, with the regulatory function of the both end voltage that reaches light fixture; Electronic ballast can be realized the intellectuality of light is controlled by various automatic control very simply, can meet the requirement controlled of illumination, also can save a large amount of electric power, but the electronic ballast price is high and stability is not enough, therefore less employing in actual applications.
Within open day, be that the patent of invention file that on 09 14th, 2011, publication number are C1102186299A discloses a kind of lighting saving device, relate to street lamp control technology field, being provided with the sky be connected with power supply opens, the other end that sky is opened is connected on the input of the input of autotransformer and bypass contactor, and the gear output of autotransformer and the output of bypass contactor are connected respectively a thermal relay.This invention has utilized relay and autotransformer, but only can reach step-down, and can not realize Based Intelligent Control.
Summary of the invention
Can only step-down in order to solve existing street lamp even load control circuit, problem that can't the normal ignition high-voltage gas discharging light when line voltage is low, the present invention proposes a kind of load control circuit based on autotransformer, not only can be energy-conservation by step-down when line voltage is normal, also can improve the lumen that the high-voltage gas discharging light both end voltage reaches normal startup high-voltage gas discharging light or increases high-voltage gas discharging light when line voltage is low, also be applicable to other loads.
The technical solution adopted in the present invention is: a kind of load control circuit based on autotransformer, comprise control circuit and regulating circuit, described control circuit comprises PLC controller and several relays, relay comprises the corner connection relay, star is succeeded electrical equipment and several Voltage regulating relay, each relay all comprises control coil and the first contact, the second contact and the 3rd contact, described PLC controller is provided with two power ends, several inputs and several outputs, two power ends of PLC controller connect respectively A phase input and neutral line input, each output of PLC controller is respectively by the corner connection relay, the control coil that star is succeeded electrical equipment and Voltage regulating relay is connected to neutral line input, described regulating circuit comprises load and coupling transformer, described load comprises the A phase load, B phase load and C phase load, described 3-phase autotransformer is provided with three secondary coils that contain several taps, be respectively the secondary coil Ta that connects A phase input and neutral line input, the secondary coil Tb and the secondary coil Tc that is connected C phase input and neutral line input that connect B phase input and neutral line input, the number of taps of each secondary coil is consistent with the quantity of Voltage regulating relay, the tap of secondary coil Ta the first contact by each Voltage regulating relay respectively is connected in series to connecing of A phase load and holds mutually a, the tap of secondary coil Tb the second contact by each Voltage regulating relay respectively is connected in series to connecing of B phase load and holds mutually b, the tap of secondary coil Tc the 3rd contact by each Voltage regulating relay respectively is connected in series to connecing of C phase load and holds mutually c, the neutral end a1 of A phase load, the neutral end b1 of B phase load, be in series with respectively star between the neutral end c1 of C phase load and neutral line input and succeed three contacts of electrical equipment, connecing between the neutral end c1 that holds mutually a and C phase load of A phase load, the neutral end a1 of A phase load holds between b mutually with connecing of B phase load, the neutral end b1 of B phase load holds between c with connecing of C phase load three contacts that are in series with respectively the corner connection relay mutually, star succeeds electrical equipment and the corner connection relay is interlocking structure.
The present invention has overcome traditional energy-saving controller for street lamp can only step-down and the shortcoming that can not boost, a kind of threephase load voltage control circuit that can boost is provided, can realize the variation of load both end voltage by the various combination of relay, not only can reduce load voltage, also can improve the voltage at load two ends.When line voltage is normal, be linked into by the different taps by secondary coil the voltage that load reduces the load two ends, reach energy-conservation purpose, and, when electrical network is low, can improve load voltage, the normal operation of proof load.The present invention is mainly used in the occasion that voltage ripple of power network is larger, or to voltage request higher occasion.
As preferably, three secondary coils of described 3-phase autotransformer connect A phase incoming end, B phase incoming end and the C phase incoming end of three-phase alternating current by the master switch QF that controls the three-phase break-make simultaneously.Master switch QF can be used as the master switch of whole circuit, is responsible for being switched on or switched off the connection of load and electric power system.
As preferably, also comprise several control switchs, many one than the quantity of Voltage regulating relay of the quantity of described control switch, the two ends of each control switch are electrically connected to one of them input, the neutral line input of PLC controller respectively.Control switch is for manually control Voltage regulating relay, star are succeeded electrical equipment/corner connection relay.
As preferably, also comprise light sensor, the two ends of described light sensation transducer are electrically connected to one of them input, the neutral line input of PLC controller respectively.The PLC controller can be according to the feedback information of the light sensation transducer received, and the control load lamp produces different brightness or carries out switching manipulation.
As preferably, also comprise voltage sensor, the two ends of described voltage sensor are electrically connected to one of them input, the neutral line input of PLC controller respectively.The PLC controller can be according to the feedback information of the voltage sensor received, and the control load lamp produces different brightness or carries out switching manipulation.
As preferably, also comprise the driving transducer, the two ends of described driving transducer are electrically connected to one of them input, the neutral line input of PLC controller respectively.The PLC controller can be according to the feedback information of the driving transducer received, and the control load lamp produces different brightness or carries out switching manipulation.
The invention has the beneficial effects as follows: having overcome traditional energy-saving controller can only step-down and the shortcoming that can not boost, the voltage that can reduce the load two ends when line voltage is normal reaches energy-conservation purpose, can improve the load both end voltage when electrical network is low, realizes the normal starter of high-voltage gas discharging light.
The accompanying drawing explanation
Fig. 1 is the circuit diagram of threephase load of the present invention and relay contact;
Fig. 2 is the circuit diagram of autotransformer of the present invention;
Fig. 3 is the circuit diagram of PLC controller of the present invention and relay control coil.
In figure, U1-PLC controller, L1-A phase load, the L2-B phase load, the L3-C phase load, KM1-the first Voltage regulating relay, KM2-the second Voltage regulating relay, KM3-the 3rd Voltage regulating relay, KM4-the 4th Voltage regulating relay, the KM5-star is succeeded electrical equipment, KM6-corner connection relay, A-A phase incoming end, B-B phase incoming end, C-C phase incoming end, N-neutral line input, connecing mutually of a-A phase load held, connecing mutually of b-B phase load held, and connecing mutually of c-C phase load held, 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.
Embodiment 1
A kind of load control circuit based on autotransformer, comprise control circuit and regulating circuit.Control circuit comprises PLC controller U1 and 6 relays, as shown in Figure 3, relay comprises that corner connection relay K M5, star succeed electrical equipment KM6 and four Voltage regulating relay---the first Voltage regulating relay KM1, the second Voltage regulating relay KM2, the 3rd Voltage regulating relay KM3 and the 4th Voltage regulating relay KM4, each relay all has control coil and the first contact, the second contact and the 3rd contact.The PLC controller is provided with two power ends, 5 inputs and 6 outputs, two power ends of PLC controller connect respectively A phase input and neutral line input, 6 outputs of PLC controller are respectively by corner connection relay K M5, star is succeeded electrical equipment KM6, the first Voltage regulating relay KM1, the second Voltage regulating relay KM2, the control coil of the 3rd Voltage regulating relay KM3 and the 4th Voltage regulating relay KM4 is connected to neutral line input N, 5 inputs connect respectively control relay KM1, relay K M2, relay K M3, relay K M4, the control button of relay K M5/ relay K M6, the other end of these control buttons connects neutral line input N.
As depicted in figs. 1 and 2, regulating circuit comprises load and coupling transformer, load comprises A phase load L1, B phase load L2 and C phase load L3, A phase load L1, B phase load L2 and C phase load L3 can be high-voltage gas discharging lights, can be also other lighting loads, can be also non-lighting load.Be in series with respectively star between the neutral end c1 of the neutral end a1 of A phase load, the neutral end b1 of B phase load, C phase load and neutral line input and succeed three contacts of electrical equipment KM6, the connecing of A phase load held between the neutral end c1 of a and C phase load mutually, the neutral end a1 of A phase load and B phase load connect hold mutually between b, neutral end b1 and the connecing of C phase load of B phase load hold between c three contacts that are in series with respectively corner connection relay K M5 mutually, star succeeds electrical equipment KM6 and corner connection relay K M5 is interlocking structure.
3-phase autotransformer is provided with three secondary coils that contain four taps, be respectively secondary coil Ta, secondary coil Tb and secondary coil Tc, secondary coil Ta two ends connect respectively A phase input and neutral line input, four taps of secondary coil 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 is connected to connecing of A phase load and holds mutually a, secondary coil Tb two ends connect respectively B phase input and neutral line input, four taps of secondary coil 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 is connected to connecing of B phase load and holds mutually b, secondary coil Tc two ends connect respectively C phase input and neutral line input, four taps of secondary coil 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 is connected to connecing of C phase load and holds mutually c.Each different tap has different secondary voltages, therefore by different tap access loads, and voltage that also just can the control load two ends.These four groups of switches can only have one group of switch closure, and when having one group of switch closed, other switches will be in off-state.Therefore, in controller, facing to four groups of control switchs, realize blocking function,, when one group of switch is closed, other switches can't be closed.
Three contact KM5_1, the KM5_2 of relay K M5 and KM5_3 are responsible for controlling and convert threephase load to corner connection type of attachment access electrical network; Three contact KM6_1, KM6_2 and the KM6_3 of relay K M6 are the connecting valves between threephase load and the neutral line, are responsible for threephase load with Y-connection form access electrical network.In the time of KM5_1, KM5_2 and KM5_3 closure, require KM6_1, KM6_2 and KM6_3 to disconnect; When K switch M6_1, KM6_2 and KM6_3 are closed, require KM5_1, KM5_2 and KM5_3 to disconnect.
During use, when load is high-voltage gas discharging light, connected mode by transformation load or select different secondary coil taps, not only can be when line voltage be normal, reach energy-conservation purpose by reducing the high-voltage gas discharging light both end voltage, also can be when line voltage be low, rising high-voltage gas discharging light both end voltage, normally start high-voltage gas discharging light or increase the lumen of high-voltage gas discharging light.Equally, also be applicable to other loads.
Embodiment 2
In embodiment 2, PLC controller U1 has eight inputs, five inputs connect respectively controls the control button that the first Voltage regulating relay KM1, the second Voltage regulating relay KM2, the 3rd Voltage regulating relay KM3, the 4th Voltage regulating relay KM4, corner connection relay K M5/ star are succeeded electrical equipment KM6, another three inputs connect respectively light sensation transducer, driving transducer and voltage sensor, the PLC controller can be according to the feedback information of each transducer received, the control load lamp produces different brightness or carries out switching manipulation, identical in other and embodiment 1.
Above embodiment only, for explanation technological thought of the present invention, can not limit protection scope of the present invention with this, every technological thought proposed according to the present invention, and any change of doing on the technical scheme basis, within all falling into protection scope of the present invention.
Claims (6)
1. the load control circuit based on autotransformer, it is characterized in that: comprise control circuit and regulating circuit, described control circuit comprises PLC controller and several relays, relay comprises the corner connection relay, star is succeeded electrical equipment and several Voltage regulating relay, each relay all comprises control coil and the first contact, the second contact and the 3rd contact, described PLC controller is provided with two power ends, several inputs and several outputs, two power ends of PLC controller connect respectively A phase input and neutral line input, each output of PLC controller is respectively by the corner connection relay, the control coil that star is succeeded electrical equipment and Voltage regulating relay is connected to neutral line input,
Described regulating circuit comprises load and coupling transformer, described load comprises the A phase load, B phase load and C phase load, described 3-phase autotransformer is provided with three secondary coils that contain several taps, be respectively the secondary coil Ta that connects A phase input and neutral line input, the secondary coil Tb and the secondary coil Tc that is connected C phase input and neutral line input that connect B phase input and neutral line input, the number of taps of each secondary coil is consistent with the quantity of Voltage regulating relay, the tap of secondary coil Ta the first contact by each Voltage regulating relay respectively is connected in series to connecing of A phase load and holds mutually a, the tap of secondary coil Tb the second contact by each Voltage regulating relay respectively is connected in series to connecing of B phase load and holds mutually b, the tap of secondary coil Tc the 3rd contact by each Voltage regulating relay respectively is connected in series to connecing of C phase load and holds mutually c,
Be in series with respectively star between the neutral end c1 of the neutral end a1 of A phase load, the neutral end b1 of B phase load, C phase load and neutral line input and succeed three contacts of electrical equipment, the connecing of A phase load held between the neutral end c1 of a and C phase load mutually, the neutral end a1 of A phase load and B phase load connect hold mutually between b, neutral end b1 and the connecing of C phase load of B phase load hold between c three contacts that are in series with respectively the corner connection relay mutually, star succeeds electrical equipment and the corner connection relay is interlocking structure.
2. the load control circuit based on autotransformer according to claim 1 is characterized in that: three secondary coils of described 3-phase autotransformer connect A phase incoming end, B phase incoming end and the C phase incoming end of three-phase alternating current by the master switch QF that controls the three-phase break-make simultaneously.
3. the load control circuit based on autotransformer according to claim 1, it is characterized in that: also comprise several control switchs, many one than the quantity of Voltage regulating relay of the quantity of described control switch, the two ends of each control switch are electrically connected to one of them input, the neutral line input of PLC controller respectively.
4. according to claim 1 or the 2 or 3 described load control circuits based on autotransformer, it is characterized in that: also comprise light sensor, the two ends of described light sensation transducer are electrically connected to one of them input, the neutral line input of PLC controller respectively.
5. according to claim 1 or the 2 or 3 described load control circuits based on autotransformer, it is characterized in that: also comprise voltage sensor, the two ends of described voltage sensor are electrically connected to one of them input, the neutral line input of PLC controller respectively.
6. according to claim 1 or the 2 or 3 described load control circuits based on autotransformer, it is characterized in that: also comprise the driving transducer, the two ends of described driving transducer are electrically connected to one of them input, the neutral line input of PLC controller respectively.
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| CN201310355505.5A CN103428981B (en) | 2013-08-15 | 2013-08-15 | Autotransformer based load control circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI548962B (en) * | 2015-08-04 | 2016-09-11 | 尚偉機電有限公司 | Transformer module |
| CN107623978A (en) * | 2017-09-22 | 2018-01-23 | 中国科学院西安光学精密机械研究所 | Expandable air-cooled long-arc xenon lamp array control device and method |
| CN109742836A (en) * | 2019-03-01 | 2019-05-10 | 张家港江苏科技大学产业技术研究院 | Alternator for vehicle and the automobile batteries charging system for using the alternator for vehicle |
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| CN109742836A (en) * | 2019-03-01 | 2019-05-10 | 张家港江苏科技大学产业技术研究院 | Alternator for vehicle and the automobile batteries charging system for using the alternator for vehicle |
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| CN103428981B (en) | 2015-04-15 |
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