CN202663316U - Circuit with three common-grounded power supplies of high voltage alternating current, low voltage alternating current and low voltage direct current - Google Patents
Circuit with three common-grounded power supplies of high voltage alternating current, low voltage alternating current and low voltage direct current Download PDFInfo
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- CN202663316U CN202663316U CN2012202806127U CN201220280612U CN202663316U CN 202663316 U CN202663316 U CN 202663316U CN 2012202806127 U CN2012202806127 U CN 2012202806127U CN 201220280612 U CN201220280612 U CN 201220280612U CN 202663316 U CN202663316 U CN 202663316U
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Abstract
The utility model provides a circuit with three common-grounded power supplies of high voltage alternating current, low voltage alternating current and low voltage direct current, belonging to the technical field of electrical control power. The circuit comprises low voltage alternating current power supply, low voltage direct current power supply, a voltage stabilizing circuit, a high voltage alternating current loaded control apparatus and a control circuit of the control apparatus; the low voltage alternating current power supply is obtained by depressurizing the high voltage alternating current power supply through a voltage depressurizing capacitor; the low voltage direct current power supply is obtained by depressurizing and bridge rectifying the high voltage alternating current power supply through the voltage depressurizing capacitor; the stabilizer circuit is connected with the low voltage direct current power supply; the high voltage alternating current power supply is in a single-phase or three-phase four-wire system; a capacitor is respectively in parallel connection between the cathode of the low voltage direct current power supply and the alternating current input end of the rectifying bridge; and a voltage stabilizing diode is connected between the anode and cathode of the low voltage direct current voltage source in parallel. The circuit provided by the utility model can meet the following requirements of small power consumption, small size, low cost and high efficiency; and the low voltage direct current power supply, the low voltage alternating current power supply and the high voltage alternating current power supply can be common-grounded, or the low voltage direct current power supply, the low voltage alternating current power supply and the high-voltage alternating current loaded control apparatuses can be common-grounded.
Description
Technical field
The utility model belongs to the electrical equipment control power technique fields, is specifically related to a kind of high-voltage ac power and its low-voltage alternating current power supply that produces and low-voltage dc power supply three power supplys circuit altogether.
Background technology
In low-voltage electrical apparatus small-power phase control techniques, high-tension AC load often needs to carry out control out of service or that put into operation according to various signals.The required low-voltage dc power supply of generation and processing control signals is obtained by all-wave or halfwave rectifier usually.Obtain this control and have four kinds with the method for low-voltage dc power supply: the first is directly the high voltage AC power to be carried out rectification, by switch power technology high-voltage DC power supply is become low-voltage dc power supply again; The second is directly the high voltage AC power to be carried out rectification, obtains low-voltage dc power supply by resistance step-down and voltage stabilizing didoe (perhaps three-terminal voltage-stabilizing module) voltage stabilizing again; The third is first by rectification behind the capacitance decompression, again by resistance step-down and voltage stabilizing didoe (perhaps three-terminal voltage-stabilizing module) voltage stabilizing, obtains low-voltage dc power supply; The 4th kind is to obtain low-voltage dc power supply by transformer pressure-reducing, after rectification.In the less situation of the load current of the low-voltage dc power supply that control circuit is used, in order to improve the conversion efficiency from the AC power to the low-voltage dc power supply, should select the mode of rectification after the ac capacitor step-down.
Bidirectional thyristor is often used as the high-voltage ac power load and puts into operation and the phased device of electric semiconductor out of service.The negative pole of the low-voltage dc power supply that the negative electrode of thyristor will be used with control circuit is connected together (or claiming that namely two or more circuit modules have public tie point altogether).That can accomplish this point has halfwave rectifier and a transformer pressure-reducing rectification.Halfwave rectifier capacitor step-down weak effect can not use, and can only use resistor step-down or the step-down of resistance capacitance parallel branch.Because the loss of dropping resistor is larger, from reducing the requirement of energy consumption, adopt the halfwave rectifier of resistor step-down inapplicable.If adopt the transformer pressure-reducing rectifier system, because the loss of transformer is larger, neither the best-of-breed technology approach.Adopt capacitor step-down, can obtain low-voltage dc power supply through bridge-type or full-wave rectification again, but the negative pole of low-voltage dc power supply can not with the negative electrode of thyristor altogether.A kind of way altogether is, after low-voltage dc power supply, adopts the DC-isolation power supply again, make the low-voltage dc power supply after the isolation negative pole can with the negative electrode of thyristor altogether.But the efficient of insulating power supply is lower, and cost is higher.Thus, make the negative electrode of control usefulness low-voltage dc power supply negative pole and thyristor altogether, only have the way that adopts transformer pressure-reducing rectification and low-voltage direct insulating power supply, the efficient of these two kinds of ways and cost are all higher.
In order to regulate the power of high-voltage ac power load, the load of high-voltage ac power is dropped into and out of service, usually adopt phase controlled thyristors.To reach by the on-delay angle of regulating thyristor the purpose of regulating the high-voltage ac power load, just must obtain the frequency of high-voltage ac power and the signal at phase angle, therefore the low-voltage alternating current power supply with high-voltage ac power same frequency same-phase same waveform need to be arranged.Namely when high efficiency obtains low-voltage dc power supply, also must obtain expeditiously the low-voltage alternating current power supply with high-voltage ac power same frequency same-phase same waveform.
Further, the negative pole of the low-voltage dc power supply that also must use with control circuit from the signal of the low-voltage alternating current power supply of high-voltage ac power altogether so that control circuit obtains phase control signal.
By above-mentioned analysis as seen, and can realize economic and practical high quality control to low-voltage electrical apparatus, circuit is had following requirement: the one, that power consumption is little, volume is little, cost is low; The 2nd, can obtain expeditiously low-voltage dc power supply and low-voltage alternating current power supply; The 3rd, low-voltage alternating current power supply and low-voltage dc power supply must can be altogether, in order to produce phased signal; The 4th, low-voltage dc power supply, low-voltage alternating current power supply, high-voltage ac power three must be altogether, or the control device of low-voltage dc power supply, low-voltage alternating current power supply, the load of control high-voltage alternating must can be altogether.
Can satisfy at present the technological approaches of the 3rd and the 4th requirement, transformer mode and low-voltage direct insulating power supply mode are arranged, but volume of transformer be large, cost is high, and power consumption is large; The mode of low-voltage direct insulating power supply although can solve the common ground problem of negative electrode and the low-voltage dc power supply after the isolation of thyristor, is that cost is high, and needs self-oscillation that small signal circuit is had electromagnetic interference equally.
Use has the relay of electrical isolation function, perhaps uses the load of the thyristor control high-voltage ac power of photoelectricity isolated controlling, can make low-voltage dc power supply and high-voltage ac power that the performance of electrical isolation is arranged.Use this two kinds of method control high-voltage ac powers load, although the convenient altogether problem that solves, the cost of relay and photoelectric coupling thyristor is high, and volume is large.
As long as use the load of thyristor control high-voltage ac power, high-voltage ac power and low-voltage dc power supply are not electrical isolation just, and not all control circuit all must carry out electrical isolation with high-voltage ac power.
The result of literature search shows there is not so far to satisfy simultaneously the technical scheme of above-mentioned four requirements.For example: application number is 90102363.9 Chinese patent file, and name is called " capacitive voltage regulating dc power supply ", this technical scheme circuit more complicated, although solved the efficiency of transformer pressure-reducing rectification, manufacturing cost is high.Application number is 00120735.0 Chinese patent file, and name is called " coil-free ac/dc power source ", and this technical scheme does not obtain low-voltage dc power supply with transformer pressure-reducing yet, but has used the power-type switching tube, is similar to Switching Power Supply.The efficient of switch power technology is usually about 85%.Application number is 03129175.9 Chinese patent file, and name is called " a kind of low-voltage DC power source circuit ", and this technology also is to have used the power-type switching tube, and efficient is lower, and manufacturing cost is not low yet.Application number is 200620014628.8 Chinese patent file, name is called " resistance-capacitance voltage-reducing power circuit ", this technical scheme adopts the method for halfwave rectifier, can be without the power-type switching tube, also can accomplish high-voltage alternating and low-voltage direct altogether, but the low-voltage alternating current power supply that produces phase control signal can not be provided.Application number is 201010234344.0 Chinese patent file, name is called " energy-saving capacitor depressurization dual-power-supply double-isolation control module ", this technical scheme adopts capacitor step-down, improve AC power and be rectified into the efficient of DC power supply, but do not solved altogether problem and acquisition low-voltage AC power supply signal problem.Application number is 200920148689.7 Chinese patent file, name is called " capacitor parallel-connection type booster circuit of transducer air conditioning ", the purpose of this technical scheme is to improve the voltage of direct current output by electrolytic capacitor, do not use decompression capacitor, wherein the positive ends of the electrolytic capacitor of two serial connections is connected with the positive ends of bridge rectifier VD, the negative polarity end of the electrolytic capacitor of two serial connections is connected with the negative polarity end of VD, and the positive polarity of the electrolytic capacitor of two serial connections is connected in series the diode anode cathode connection that a little is connected in series with two and is connected together with negative polarity.Application number is 200520001549.9 Chinese patent file, title: " the transformerless DC power supply that suppresses the electronic circuit conducted interference ", after this technical scheme is concatenated into a resistance capacitance parallel branch by a resistance branch, be linked into again an ac input end of bridge rectifier, shunt capacitance on the diode of four (or two) brachium pontis of bridge rectifier; The purpose of this technical scheme be by on the resistance of serial connection and the brachium pontis and the diode that connects consist of a resistance-capacitance absorption branch road, the interference signal that suppresses in the electronic circuit is transmitted in the DC power supply.What be connected in series between the ac input end of the AC power of this technical scheme mesohigh and rectifier bridge is resistance branch and resistance capacitance parallel branch; The resistance of this technical scheme serial connection forms these two effects of resistance capaciting absorpting circuit by step-down with electric capacity on the brachium pontis; This technical scheme electric capacity upper at rectifying bridge arm (diode) and that connect is the capacitive part that suppresses in the required resistance-capacitance absorption branch road of conducted interference; Between the negative pole (the anodic bonding points of two diodes) of the DC power supply of this technical scheme rectifier bridge output and two ac input ends of rectifier bridge and the capacitor that connects, play the effect that suppresses interference.Application number is 200910126979.6 Chinese patent file, title: " transforming circuit for capacitor ", in this technology, between the phase line of an ac input end of bridge rectifier and high-tension AC power or zero line, be serially connected with decompression capacitor, between two ac input ends of bridge rectifier and connect a dividing potential drop electric capacity.The dividing potential drop electric capacity of this technology directly is connected on two ac input ends of rectifier bridge, and the voltage-dividing capacitor of this technology only plays the effect that exchanges dividing potential drop.Application number is 200710008782.3, title: " capacitance-voltage-distributing type DC power supply " is just the same on the annexation of capacitor and bridge rectifier with above-mentioned " transforming circuit for capacitor ".Application number is the Chinese patent file of 89202917.X, title: " capacitive charger ", this technology and above-mentioned " transforming circuit for capacitor " are almost identical, and just the decompression capacitor capacity is regulated by one group of switch in this technology.Application number is 99248860.5 Chinese patent file, title: " capacitance decompression driving light-emitting diode assembly ", the difference of this technology and above-mentioned " capacitive charger " is, the direct voltage size of bridge rectifier output depends on the ratio of the capacitor value of the resistance value of DC load and decompression capacitor.Application number is 201120066640.4 Chinese patent file, and name is called " the brightness tunable radiation emitting diode drive circuit of capacitively coupled ", and its technical scheme and application number are that 99248860.5 patent document is similar.
Summary of the invention
The purpose of this utility model is to provide a kind of high-voltage alternating and low-voltage alternating-current and low-voltage direct three power supplys circuit altogether, and this circuit can satisfy following the requirement simultaneously: power consumption is little, volume is little, cost is low; Can obtain expeditiously low-voltage dc power supply and low-voltage alternating current power supply; Low-voltage dc power supply, low-voltage alternating current power supply, high-voltage ac power three can be altogether, or the control device three of low-voltage dc power supply, low-voltage alternating current power supply, high-voltage alternating load can be altogether.
The utility model circuit contains the low-voltage alternating current power supply that obtained by high-voltage ac power, is connected the control device of the low-voltage dc power supply that obtains, the voltage stabilizing circuit that is connected with low-voltage dc power supply, high-voltage alternating load and the control circuit of this control device by high-voltage ac power with bridge rectifier through the decompression capacitor step-down after the decompression capacitor step-down
When high-voltage ac power when being single-phase, the phase line of single phase alternating current power supply or zero line are received the first end of decompression capacitor, second of this decompression capacitor terminates to an ac input end in the rectifier bridge, another ac input end connects zero line or the phase line of high-voltage ac power, two ac input end amongs in the negative pole of low-voltage DC potential source and the rectifier bridge also are connected to a capacitor, the second end of decompression capacitor is connected with the signal input part of control circuit, or that end that high-voltage ac power is not connected with decompression capacitor is connected with the signal input part of control circuit, preferably the second end of decompression capacitor is connected with the signal input part of control circuit, the signal output part of control circuit connects the signal input part of control device, the power input of the output connection control circuit of voltage stabilizing circuit, be parallel with voltage stabilizing didoe between the both positive and negative polarity of low-voltage DC potential source, between the second end that the low-voltage alternating-current load is connected on decompression capacitor and the end that high-voltage ac power is not connected with decompression capacitor;
When high-voltage ac power is three-phase four-wire system, every phase line of three-phase alternating-current supply received the first end of a decompression capacitor, the second end of each decompression capacitor is received respectively in three ac input ends that have in the three-phase four-wire system full bridge rectifier, a remaining ac input end connects the zero line of high-voltage ac power, four ac input end amongs in the negative pole of low-voltage dc power supply and the rectifier bridge are parallel with a capacitor, the second end of decompression capacitor is connected with the signal input part of control circuit, the signal output part of control circuit connects the signal input part of control device, the power input of the output connection control circuit of voltage stabilizing circuit is parallel with voltage stabilizing didoe between the both positive and negative polarity of low-voltage DC potential source.
No matter be to single-phase or the AC power of three-phase four-wire system, no matter be single-phase bridge rectification or three-phase bridge rectification also, the capacitor step-down circuit of the high-voltage ac power that the above relates to, rectification circuit, voltage stabilizing circuit, the control circuit of control device is prior art, by those skilled in the art is known.The control device of said high-voltage load can be the power semiconductor device of voltage or Current Control, preferably adopts unidirectional or bidirectional thyristor.
Operation principle: be connected between the negative pole of the ac input end of full bridge rectifier of decompression capacitor and low-voltage DC potential source and produce the low pressure sine ac power supply that contains DC component, this sine ac power supply and low-voltage dc power supply be (end of low pressure sinusoidal ac potential source and the negative polarity end of low-voltage dc power supply have points of common connection) altogether.The zero line of high pressure sine ac power supply can flow through the positive and negative half-wave current of high pressure sine ac power supply load to the parallel branch of the capacitor between the negative pole of low-voltage dc power supply and rectifier diode, and the equivalent AC impedance of this branch road to compare the impedance of high pressure simple alternating current load little a lot of times, thereby make the negative pole of the zero line of high pressure sine ac power supply and low-voltage dc power supply possess the electrical characteristic on common ground.So consist of high-voltage alternating sine power supply, low pressure sine ac power supply and low-voltage dc power supply totally three power supplys circuit structure altogether.
The negative electrode of the single-phase or bidirectional thyristor of control high pressure sine ac power supply load can link to each other with the negative pole of low-voltage dc power supply, thereby consists of the negative electrode circuit altogether of the thyristor of high pressure sine ac power supply, low-voltage dc power supply, low pressure sine ac power supply and control high pressure simple alternating current load.
In this circuit structure, all are connected between the zero line of the paramount positive pressure string of ac input end AC power of full bridge rectifier of decompression capacitor and produce the low pressure sine ac power supply that does not contain DC component, and this low-voltage alternating current power supply can connect the load of sinusoidal low-voltage alternating current power supply.
Under the condition that cost and volume allow, the two ends of all diodes that also can be in bridge rectifier all and the capacity such as connect be the capacitor of C, can further improve the electric property of this circuit structure.
The zero line of high pressure sine ac power supply to the parallel branch of the capacitor between the negative polarity end of low-voltage dc power supply and rectifier diode flows through the electric current of high pressure sine ac power supply load when larger, the magnitude of voltage of the low-voltage direct output of bridge rectifier is raise, so the low-voltage direct output is connected to voltage stabilizing didoe, with the magnitude of voltage of restriction low-voltage direct.
Further specify the operation principle of the utility model circuit below in conjunction with accompanying drawing.
See Fig. 1 and Fig. 2.Fig. 1 is the topology diagram between each functional module in the utility model circuit.Fig. 1 mesohigh AC power refers to that China's low voltage electric network voltage is 220 volts or 380 volts of AC power, and American-European countries is 120 volts.Low-voltage alternating current power supply is by producing after the decompression capacitor.Low-voltage dc power supply produces after by decompression capacitor and rectification.The low-voltage alternating-current load comprises the phase control signal that line voltage is provided to control circuit, owes (electricity) and presses or cross the signal that (electricity) presses, or be used for the AC load of control circuit compensation usefulness.The load current size that low-voltage alternating current power supply can bear depends on the capacitive reactance size of decompression capacitor.The load of low-voltage dc power supply mainly is control circuit in the monitoring state.Among Fig. 2, the magnitude of voltage of low-voltage dc power supply is relevant with the ratio of the capacitive reactance (being the equivalence interchange capacitive reactance between the ac input end in the bridge rectifier) of the capacitive reactance of decompression capacitor and dividing potential drop electric capacity.When high-tension AC load is larger, the amplitude of the low-voltage ac voltage component on the capacitor in parallel with rectifier diode is constant, but the amplitude of DC voltage component can rise, for the voltage of the input that makes voltage stabilizing circuit is unlikely to surpass the upper limit of voltage stabilizing circuit input voltage, need to add voltage stabilizing didoe.T among the figure is controlled thyristor.The high-voltage alternating load can be the relay/contactor coil of an actuator, also can be light-emitting apparatus etc., and high-tension AC load can be very not heavy in a word.
The single-phase high voltage AC power obtains low-voltage alternating current power supply after decompression capacitor 1 step-down, the single-phase high voltage AC power is through decompression capacitor 1 step-down and obtain low-voltage dc power supply after rectification, and voltage stabilizing circuit is connected with low-voltage dc power supply.The phase line L of high-voltage ac power connects the first end of decompression capacitor 1, and the low-voltage alternating current power supply that produces on the branch road of rectifier diode and Parallel-connected Capacitor directly is connected with low-voltage dc power supply altogether.High-voltage ac power by rectifier diode and capacitor parallel branch and low-voltage dc power supply altogether.The zero line N of high-voltage ac power is connected with an end of a branch road that is formed in parallel by diode 2 and capacitor 3, and the other end of this branch road is the negative pole of low-voltage dc power supply.Be parallel with the voltage-stabiliser tube 4 that deboost raises between the positive pole of low-voltage dc power supply and the negative pole.Cross-over connection has a branch road that is formed in parallel by diode 6 and capacitor 5 between the second end of decompression capacitor 1 and the negative pole of low-voltage dc power supply, the second end of decompression capacitor 1 is connected with the signal input part of control circuit, the signal output part of control circuit connects the gate pole of bidirectional thyristor, the power input of the output connection control circuit of voltage stabilizing circuit.High-voltage ac power is single-phase simple alternating current civil power.Low-voltage alternating-current and low-voltage direct are altogether.7 is rectifier diode among Fig. 2, and 8 is filtering capacitor.The low pressure sine ac power supply that contains DC component that the branch road that diode 6 and capacitor 5 are formed in parallel produces is as the phase control signal of control circuit.When the load of bidirectional thyristor T conducting high-voltage alternating, a branch road that is formed in parallel by diode 2 and capacitor 3 provides the alternating current path of the positive and negative half-wave current of high-voltage alternating load, plays high-voltage alternating and low-voltage alternating current power supply and low-tension supply load effect altogether thereof.For the three-phase alternating current high pressure, its operation principle is also identical.
The utility model circuit adopts bridge rectifier, can be one single-phase by four rectifier diodes form full-bridge, the perhaps full-bridge that formed by eight rectifier diodes of three-phase four-wire system.The anodic bonding of rectifier diode point in the circuit (the negative polarity node of DC power supply) between the ac input end point (anode of diode and cathode connection) of rectifier bridge, all and connect that capacity equates, its capacity C is greater than the capacitor more than decompression capacitor capacity C 1 several times to hundred times; The cathode connection of rectifier diode in the circuit (the positive polarity node of DC power supply) is between the ac input end point (anode of diode and cathode connection) of rectifier bridge, but shunt-wound capacitance device, also shunt-wound capacitance device not.When the cathode connection of rectifier diode in the circuit between the ac input end point of rectifier bridge during the shunt-wound capacitance device, play the effect that the equivalence that changes between the bridge rectifier ac input end exchanges capacitive reactance, do not change the key property of the utility model circuit.
The points of common connection of all decompression capacitors and bridge rectifier ac input end is between the negative polarity end of low-voltage dc power supply, the voltage of that produce and the negative polarity end low-voltage AC potential source altogether dc low-voltage DC power supply, under the single-phase high voltage Power Supplies Condition with the voltage same-phase of single-phase high voltage power supply; Under the condition of the three-phase high-voltage power supply of three-phase four-wire system, with the phase voltage same-phase in the three-phase.
The capacity of setting decompression capacitor is C1, the condenser capacity in parallel with rectifier diode is C, when the electric current of high-voltage alternating load, low-voltage direct load and low-voltage alternating-current load is all zero, the negative polarity end of DC power supply is between the ac input end of bridge rectifier, and the theoretical ratio of the low-voltage alternating current power supply voltage effective value Uc at the branch road two ends of any one diode and Parallel-connected Capacitor and high pressure sinusoidal voltage effective value U is: U/Uc=C/ (2C1+1).
When the electric current of high-voltage alternating load, low-voltage direct load and low-voltage alternating-current load is all zero, in the bridge rectifier all diode two ends all and the capacity such as be connected to when being the capacitor of C, the negative polarity end of DC power supply to the low-voltage alternating current power supply voltage effective value Uc at the branch road two ends of any one diode between the ac input end of bridge rectifier and Parallel-connected Capacitor and the theoretical ratio of high pressure sinusoidal voltage effective value U is: U/Uc=C/ (C1+1).
When the electric current of high-voltage alternating load, low-voltage direct load and low-voltage alternating-current load is all zero, the negative polarity end of DC power supply contains two components to the low-voltage ac voltage at the branch road two ends of any one diode between the ac input end of bridge rectifier and Parallel-connected Capacitor, wherein the theoretical D. C. value of DC voltage component be (
/ 2)
Uc.Another is alternating current component, the theoretical amplitude of its sine wave AC also be (
/ 2)
Uc.
After the electric current of high-voltage alternating load flows through one of them diode and Parallel-connected Capacitor branch road by low-voltage dc power supply negative polarity end, the direct voltage of the DC voltage component on this branch road and bridge rectifier output can raise, even the high pressure sinusoidal voltage value of input remains unchanged, the low-voltage dc voltage value of output also can raise.The alternating voltage component that common node is arranged on the parallel branch of other the diode that does not flow through the high-voltage alternating load current and capacitor remains unchanged.
With the capacitor of diodes in parallel can be non-polar capacitor, also can be that electrolytic capacitor polarity, that can bear the half-sinusoid electric current is arranged.The volume of capacitor of considering nonpolarity high power capacity low-voltage is larger, should adopt loss tangent value little, can bear for a long time the electrolytic capacitor of 50 or 60 hertz half-sinusoid electric current.
Because capacitor has the characteristic of constant-current source as voltage drop element, so when the low-voltage alternating-current load current is arranged, its load impedance exchanges capacitive reactance and is parallel connection and concerns that the voltage at rectifier bridge ac input end two ends will reduce with equivalence on being connected in parallel on diode.The load capacity of low-voltage alternating current power supply is relevant with the equivalence interchange capacitor value of rectifier bridge ac input end point-to-point transmission.
The low-voltage alternating current power supply that produces on low-voltage dc power supply and the branch road by rectifier diode and Parallel-connected Capacitor is common ground, but high-voltage ac power and low-voltage dc power supply are by the parallel branch of diode and capacitor " altogether ", the positive and negative half-wave current of high-voltage alternating load current all will pass through this branch road, so the high-voltage alternating load capacity also has certain restriction.
Fig. 3 is another form of expression of Fig. 2, and the difference of the two only is: the first end of decompression capacitor is connected on the live wire L of high-voltage ac power among Fig. 2, and the first end of decompression capacitor is connected on the zero line N of high-voltage ac power among Fig. 3.
Fig. 4 is the improvement circuit of Fig. 2, and the difference of Fig. 4 and Fig. 2 is: all rectifier diodes respectively are parallel with a capacitor, are 3,5,9,10 among the figure.Preferably equate with the capacitor 3,5,9 of four diodes in parallels, 10 capacity respectively among Fig. 4.Be connected on two capacitors 9 of low-voltage dc power supply positive terminal and 10 capacity and can affect DC voltage component on two capacitors 3 and 5 that are connected on the dc power cathode end and the amplitude of alternating voltage component.When these four condenser capacities equated to be C, the proportionate relationship of low-voltage alternating current power supply voltage effective value Uc and high-voltage ac power voltage effective value U was: U/Uc=(C/C1+1).
The beneficial effect of the utility model circuit is to satisfy simultaneously following the requirement: power consumption is little, volume is little, cost is low; Can obtain expeditiously low-voltage dc power supply and low-voltage alternating current power supply; Low-voltage dc power supply, low-voltage alternating current power supply, high-voltage ac power three can be altogether, or the control device three of low-voltage dc power supply, low-voltage alternating current power supply, high-voltage alternating load can be altogether.This circuit can be used as household electrical appliance, office electrical equipment, and industrial enterprise is all electrical equipment that need to be in standby mode work required low-voltage DC potential source and low-voltage ac signal source of doing control usefulness under holding state with low-voltage electrical apparatus etc.
The anti-line voltage interference performance intrinsic because of the utility model circuit is also very strong, can be used for metering, demonstration, the field bus communication system of some electric power systems or other physical systems, the occasions such as wireless communication system.
Many control apparatuses in Industry Control, relaying protection, household electrical appliance and the office equipment are in holding state usually.Under holding state, the power consumption of control circuit can be accomplished very little, usually is not more than 100 milliwatts, but in order to obtain the needed low-voltage dc power supply of control circuit, but will consume several watts to tens watts active power.In order to obtain the simple alternating current low voltage signal of line voltage, also need to consume very large active power.Although every FU in the time energy consumption very little, they are throughout the year at network operation, and the enormous amount of this class low-voltage electrical, total energy consumption is just very surprising.The utility model circuit has very high practical value aspect energy-saving and cost-reducing.
The energy-conservation proposal " 1 watt of plan " of initiating to the whole world in 2000 for responding International Energy Agency (IEA), on December 17th, 2008, EU Committee has put into effect the Eco-Design rules, with the standby that reduces all household electrical appliance and office equipment or the power consumption of " shut " mode", and in formal enforcement on January 7th, 2009.Laws and regulations requirement: before 2013, the standby of all electric equipment products or the energy consumption of " shut " mode" must be less than 1 watt (for the products without indicating device), or less than 2 watts (for products that indicating device is arranged).From 2013, the standby of all electric equipment products or the energy consumption of " shut " mode" must be less than 0.5 watt (for the products without indicating device), or less than 1 watt (for product that indicating device is arranged), and before the year two thousand twenty, the power consumption of standby or " shut " mode" reduces 75% again.This is the requirement of whole mankind's sustainable development, is energy-saving and emission-reduction, and the needs of environmental protection are the Trade technique barriers that EU Committee arranges.Reduce household electrical appliance and the standby of office appliances or the power consumption of " shut " mode", comprise that minimizing industrial enterprise is the competitiveness institute problem needing to overcome that keeps China's low-pressure electronic equipment product with the power consumption of the standby mode of low voltage electrical equipment, also be energy-saving and emission-reduction, the needs of sustainable development.
Along with the development of very large scale integration technology, the power consumption of functional integrated circuit (IC) chip is more and more less, and the power consumption of generation low-voltage dc power supply and low-voltage alternating current power supply never can lower.The utility model is in that exchange to obtain aspect low-voltage dc power supplies and the low-voltage alternating current power supply Technological Economy meaning by 220 volts/380 volts expeditiously very obvious.
Description of drawings
Fig. 1 is the topology diagram between each functional module in the utility model circuit.
Fig. 2 is a kind of electrical schematic diagram of high-voltage ac power when being single-phase.
Fig. 3 is high-voltage ac power another electrical schematic diagram when being single-phase.
Fig. 4 is high-voltage ac power when being single-phase, the electrical schematic diagram when each rectifier diode is parallel with capacitor.
Fig. 5 is the electrical schematic diagram of embodiment 1.
Fig. 6 is the electrical schematic diagram of embodiment 2.
Fig. 7 is the electrical schematic diagram of embodiment 3.
Embodiment
Embodiment 1: see Fig. 5.High-voltage ac power load (being to be subjected to phased load among Fig. 5) is an illuminating lamp that brightness is adjustable, or the ohmic load by phased adjusting active power.The gate signal of control circuit output is phased trigger impulse, thereby the on-delay angle of control thyristor, the active power of high-tension AC power load is changed, reach the purpose of control lighting brightness, perhaps reach the purpose of controlling resistance bearing power.
Embodiment 2: see Fig. 6.High-voltage ac power load (being subjected to phased load) is a relay or contactor coil, the gate signal of control circuit output is certain signal that requires relay/contactor coil energising or cut off the power supply that receives according to control circuit, be to cause a kind of state of low-voltage electrical apparatus (such as holding state, power supply state) changes another state (such as operating state, off-position) over to.The gate pole trigger impulse of phase controlled thyristors, or be high level (coil electricity), or be low level (coil blackout), thus the energising of control relay coil and outage.In the relaying protection of electric power system or in the low-voltage electrical apparatus of family expenses, office usefulness, this relay coil can be tripping coil, makes power failure, or the energising pull-in winding, power supply begun; It also can be the relay that produces the protection action.Residual current protecting relay for example, at this moment, the low-voltage alternating-current load among Fig. 6 is resistance, the capacitive compensation circuit of residual current transformer.Include the amplitude variable quantity of high-voltage ac power in the signal that the diode that is connected altogether with the dc power cathode end and Parallel-connected Capacitor branch road output to control circuit.When the voltage of high voltage source raise or reduce, the voltage amplitude on this parallel branch can change, thereby realizes the defencive function of under-voltage (voltage is too low) or overvoltage (voltage is too high).For example the utility model can be used as under the holding state of television set again, accepts the required power supply of circuit of remote control command, can guarantee that the stand-by power consumption of television set is less than 0.1 watt.At this moment, the high-voltage alternating load among Fig. 6 is the coil of a small-sized relay, and control circuit receives the instruction that is transformed into operating state by holding state, and high level of control circuit output powers on relay, is transferred to mode of operation to cause television set.
Embodiment 3: see Fig. 7.Every phase line of three-phase four-wire system high-voltage ac power connects the first end of corresponding decompression capacitor, and the three-phase low-voltage AC power directly is connected with high-voltage ac power altogether.The zero line N(n of high-voltage ac power) input with a branch road that is formed in parallel by rectifier diode 11 and capacitor 12 is connected, and the anode of this rectifier diode is the negative pole of low-voltage dc power supply.Between the second end of each decompression capacitor and the negative pole of low-voltage dc power supply respectively cross-over connection a branch road that is formed by rectifier diode and Parallel-connected Capacitor is arranged.The second end of each decompression capacitor is connected with the corresponding signal input of control circuit, and the signal output part of control circuit connects the gate pole of thyristor 13, the power input of the output connection control circuit of voltage stabilizing circuit.Three phase line A, B, C are connected respectively to three by three tie point a of the parallel branch of diode and capacitor through decompression capacitor, b, c, zero line N directly receive the 4th rectifier diode with by the diode 11 tie point n with the parallel branch of capacitor 12.Node a, b, the voltage between c and the low-voltage dc power supply negative pole end is exactly the low-voltage ac voltage signal, and the phase voltage of they and three-phase high-voltage AC supply voltage is homophase and three-phase symmetrical respectively.The value of the voltage signal voltage between node n and the low-voltage dc power supply negative pole reflects the symmetry of three-phase alternating-current supply.When three-phase voltage was symmetrical, in theory, the voltage between node n and the low-voltage dc power supply negative pole was zero; When three-phase voltage is asymmetric, in the voltage between node n and the low-voltage dc power supply negative pole, amplitude is arranged greater than zero direct current signal and AC signal.Node a, b, the low-voltage ac voltage signal between c and the low-voltage dc power supply negative pole is also asymmetric.When phase shortage (one or two phase line outage in three phase lines) occurring, node a, b, it is which cuts off the power supply mutually that c can reflect the voltage signal of low-voltage direct negative pole.Therefore present embodiment can be used as Aftercurrent protection circuit breaker or steelyard slepsydra electric protection circuit breaker, open-phase protection relay, phase failure relay, low-voltage alternating current power supply and the low-voltage dc power supply of three-phase asymmetrical protection relay etc.The coil of relay or contactor can have phase voltage by the phase line power supply of three-phase alternating-current supply on the coil, perhaps powered by low-voltage dc power supply.
Above embodiment only is for the utility model is described in further detail, and scope of the present utility model is not subjected to the limitation of illustrated embodiment.
Claims (5)
1. a high-voltage alternating and low-voltage alternating-current and low-voltage direct three power supplys circuit altogether, contain the low-voltage alternating current power supply that after the decompression capacitor step-down, obtained by high-voltage ac power, be connected the control device of the low-voltage dc power supply that obtains, the voltage stabilizing circuit that is connected with low-voltage dc power supply, high-voltage alternating load and the control circuit of this control device by high-voltage ac power with bridge rectifier through the decompression capacitor step-down, it is characterized in that:
When high-voltage ac power when being single-phase, the phase line of single phase alternating current power supply or zero line are received the first end of decompression capacitor, second of this decompression capacitor terminates to an ac input end in the rectifier bridge, another ac input end connects zero line or the phase line of high-voltage ac power, two ac input end amongs in the negative pole of low-voltage DC potential source and the rectifier bridge also are connected to a capacitor, the second end of decompression capacitor is connected with the signal input part of control circuit, or that end that high-voltage ac power is not connected with decompression capacitor is connected with the signal input part of control circuit, the signal output part of control circuit connects the signal input part of control device, the power input of the output connection control circuit of voltage stabilizing circuit, be parallel with voltage stabilizing didoe between the both positive and negative polarity of low-voltage DC potential source, between the second end that the low-voltage alternating-current load is connected on decompression capacitor and the end that high-voltage ac power is not connected with decompression capacitor;
When high-voltage ac power is three-phase four-wire system, every phase line of three-phase alternating-current supply received the first end of a decompression capacitor, the second end of each decompression capacitor is received respectively in three ac input ends that have in the three-phase four-wire system full bridge rectifier, a remaining ac input end connects the zero line of high-voltage ac power, four ac input end amongs in the negative pole of low-voltage dc power supply and the rectifier bridge are parallel with a capacitor, the second end of decompression capacitor is connected with the signal input part of control circuit, the signal output part of control circuit connects the signal input part of control device, the power input of the output connection control circuit of voltage stabilizing circuit is parallel with voltage stabilizing didoe between the both positive and negative polarity of low-voltage DC potential source.
2. high-voltage alternating as claimed in claim 1 and low-voltage alternating-current and low-voltage direct three power supplys circuit altogether is characterized in that: when high-voltage ac power when being single-phase, the second end of decompression capacitor is connected with the signal input part of control circuit.
3. high-voltage alternating as claimed in claim 1 and low-voltage alternating-current and low-voltage direct three power supplys circuit altogether, it is characterized in that: the control device of said high-voltage ac power load is the power semiconductor device of voltage or Current Control.
4. high-voltage alternating as claimed in claim 1 and low-voltage alternating-current and low-voltage direct three power supplys circuit altogether is characterized in that: the two ends of all diodes in bridge rectifier all and the capacitor of capacity such as be connected to.
5. high-voltage alternating as claimed in claim 3 and low-voltage alternating-current and low-voltage direct three power supplys circuit altogether, it is characterized in that: power semiconductor device is unidirectional or bidirectional thyristor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202806127U CN202663316U (en) | 2012-06-14 | 2012-06-14 | Circuit with three common-grounded power supplies of high voltage alternating current, low voltage alternating current and low voltage direct current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202806127U CN202663316U (en) | 2012-06-14 | 2012-06-14 | Circuit with three common-grounded power supplies of high voltage alternating current, low voltage alternating current and low voltage direct current |
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| Publication Number | Publication Date |
|---|---|
| CN202663316U true CN202663316U (en) | 2013-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012202806127U Expired - Fee Related CN202663316U (en) | 2012-06-14 | 2012-06-14 | Circuit with three common-grounded power supplies of high voltage alternating current, low voltage alternating current and low voltage direct current |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102694477A (en) * | 2012-06-14 | 2012-09-26 | 邹溪 | High-voltage alternating current power supply, low-voltage alternating current power supply and low-voltage direct current power supply common-base circuit |
| CN106899200A (en) * | 2015-12-17 | 2017-06-27 | 上海昱章电气成套设备有限公司 | The supply unit of rod control system |
| US20210059497A1 (en) * | 2019-09-04 | 2021-03-04 | Champion Industries, Inc. | Dynamic dispensing system |
-
2012
- 2012-06-14 CN CN2012202806127U patent/CN202663316U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102694477A (en) * | 2012-06-14 | 2012-09-26 | 邹溪 | High-voltage alternating current power supply, low-voltage alternating current power supply and low-voltage direct current power supply common-base circuit |
| CN102694477B (en) * | 2012-06-14 | 2014-10-29 | 邹溪 | High-voltage alternating current power supply, low-voltage alternating current power supply and low-voltage direct current power supply common-base circuit |
| CN106899200A (en) * | 2015-12-17 | 2017-06-27 | 上海昱章电气成套设备有限公司 | The supply unit of rod control system |
| US20210059497A1 (en) * | 2019-09-04 | 2021-03-04 | Champion Industries, Inc. | Dynamic dispensing system |
| US12004696B2 (en) * | 2019-09-04 | 2024-06-11 | Champion Industries, Inc. | Dynamic dispensing system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130109 Termination date: 20150614 |
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| EXPY | Termination of patent right or utility model |