DK177225B1 - AC / DC Power Supply with Phase Cut Circuit - Google Patents
AC / DC Power Supply with Phase Cut Circuit Download PDFInfo
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- DK177225B1 DK177225B1 DKPA201001129A DKPA201001129A DK177225B1 DK 177225 B1 DK177225 B1 DK 177225B1 DK PA201001129 A DKPA201001129 A DK PA201001129A DK PA201001129 A DKPA201001129 A DK PA201001129A DK 177225 B1 DK177225 B1 DK 177225B1
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- circuit
- converter
- voltages
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/2176—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only comprising a passive stage to generate a rectified sinusoidal voltage and a controlled switching element in series between such stage and the output
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/081—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters wherein the phase of the control voltage is adjustable with reference to the AC source
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
Abstract
1. Strømforsyning (1) til elektronisk udstyr såsom måleudstyr og signaltransmitte re til industrielle styresystemer, hvilken strømforsyning er indrettet til at kunne til sluttes et bredt interval af spændinger på forsyningsnettet, kendetegnet ved, den omfatter et indgangstrin (2) med overbelastningssikring, et kredsløb (3) til ens- retning af forsyningsspændingen, et fasesnitkredsløb (4) til bestemmelse af ind gangsspændingen til en DC/DC-konverter samt en DC/DC-konverter (5) af switch-mode typen. Herved tilvejebringes en strømforsyninig med en AC/OC-konverter, som kan til sluttes en netspændingsforsyning med spændinger liggende i intervallet lOOVac til 69OVac, og som har en stabiliseret udgangsspænding. Yderligere anvises et kredsløb uden nettransformator, hvori ensretterens spær respænding og ladekondensatorens prøvespænding er relativ lav, og hvor kreds løbet kan indbygges i et industrimodul.Power supply (1) for electronic equipment such as measuring equipment and signal transmitters for industrial control systems, which power supply is arranged to be able to connect a wide range of voltages on the supply network, characterized in that it comprises an input stage (2) with overload protection, a circuit (3) for rectifying the supply voltage, a phase section circuit (4) for determining the input voltage of a DC / DC converter and a DC / DC converter (5) of the switch-mode type. This provides a power supply with an AC / OC converter which can be connected to a mains voltage supply with voltages in the range 10OVac to 69OVac and which has a stabilized output voltage. In addition, a circuit without a mains transformer is provided, in which the rectifier voltage of the rectifier and the test voltage of the charging capacitor are relatively low, and in which the circuit can be built into an industrial module.
Description
1 DK 177225 B1 AC/DC Strømforsyning med fasesnitkredsløb1 DK 177225 B1 AC / DC Power supply with phase cut circuit
Opfindelsen vedrører en strømforsyning til elektronisk udstyr såsom måleudstyr og signaltransmittere til industrielle styresystemer, hvilken strømforsyning er ind-5 rettet til at kunne tilsluttes et bredt interval af spændinger på forsyningsnettet, og omfatter et indgangstrin (2) med overbelastningssikring, et kredsløb (3) til ensretning af forsyningsspændingen, et fasesnitkredsløb (4) til bestemmelse af indgangsspændingen til en DC/DC-konverter samt en DC/DC-konverter (5) af switch-mode typen 10 I industrielle styresystemer er spændinger, både enfasede og trefasede, til rådighed i spændingsintervallet fra 100Vac til 690Vac afhængig af, i hvilket område eller land styresystemet skal anvendes.The invention relates to a power supply for electronic equipment such as measuring equipment and signal transmitters for industrial control systems, which power supply is adapted to be connected to a wide range of voltages on the supply network, and comprises an input stage (2) with overload protection, a circuit (3) for supply voltage rectification, a phase cut circuit (4) for determining the input voltage of a DC / DC converter and a switch mode DC type (5) (10) In industrial control systems, voltages, both single-phase and three-phase, are available in voltage range from 100Vac to 690Vac depending on the region or country of the control system to be used.
15 Det er derfor nødvendig at tilpasse strømforsyningen til de til rådighed værende spændinger. Som oftest foregår det ved at indsætte en transformer i strømforsyningen. Imidlertid er det ikke særlig praktisk eller økonomisk at skulle fabrikere og lagerføre strømforsyninger indrettet til hver sin netspænding. Det er desuden et problem at skulle inkorporere en forholdsvis stor og tung transformator i et 20 strømforsyningsmodul af den type, som anvendes i industrielle styresystemer.15 It is therefore necessary to adapt the power supply to the available voltages. Most often, this is done by inserting a transformer into the power supply. However, it is not very practical or economical to have to fabricate and stockpile power supplies designed for each mains voltage. Furthermore, it is a problem to have to incorporate a relatively large and heavy transformer into a power supply module of the type used in industrial control systems.
I tidens løb er der udviklet strømforsyninger, der kan operere i spændingsintervallet fra 100Vac til 250Vac, men for at kunne opgradere disse strømforsyninger til 690Vac kræver det ensretterdioder med en spærrespænding på 2kV og lade-25 kondensatorer med prøvespændinger på mindst 1000Vdc.Over the years, power supplies have been developed that can operate in the voltage range from 100Vac to 250Vac, but in order to upgrade these power supplies to 690Vac, it requires rectifier diodes with a voltage of 2kV and charging capacitors with test voltages of at least 1000Vdc.
Fra dokumentet US 5,587,895 A kendes en AC/DC-konverter, der kan arbejde i et interval fra 24Vac til 277Vac. Strømforsyningen er udstyret med en halvbølge ensretter 12, og den ensrettede spænding er tilsluttet en MOSFET transistor 14, 30 som leverer en ladestrøm til en ladekondensator 18 på dc-siden, hvor der er an bragt en belastning L. I den negative halvperiode forsynes belastningen og 2 DK 177225 B1 MOSFET’ens styrekredsløb udelukkende fra kondensatoren. Dokumentet beskriver en strømforsyning med en enkelt ustabiliseret udgang, der ikke er galvanisk adskilt fra forsyningsnettet.From the document US 5,587,895 A is known an AC / DC converter which can operate in a range from 24Vac to 277Vac. The power supply is equipped with a half-wave rectifier 12, and the unidirectional voltage is connected to a MOSFET transistor 14, 30 which supplies a charging current to a charging capacitor 18 on the dc-side where a load L. is applied. 2 DK 177225 B1 The MOSFET control circuit exclusively from the capacitor. The document describes a power supply with a single unstabilized output that is not galvanically separated from the supply grid.
55
Fra dokumentet EP 0 651 499 A2 kendes en AC/DC-konverter, der omfatter en halvbølgeensretter (D1), og hvor den ensrettede spænding er tilsluttet en MOS-FET (QM2), som leverer strøm til en stabiliseret serie strømforsyning (11) med en enkelt udgang. Udgangen er ikke galvanisk adskilt fra forsyningsnettet.The document EP 0 651 499 A2 discloses an AC / DC converter comprising a half-wave rectifier (D1) and in which the unidirectional voltage is connected to a MOS-FET (QM2) which supplies power to a stabilized series power supply (11) with a single output. The output is not galvanically separated from the supply network.
10 Kredsløbet er indrettet til at kompensere for pludselige belastningsændringer.10 The circuit is designed to compensate for sudden load changes.
Fra dokumentet US 6,169,391 B1 kendes en AC/DC- konverter, som omfatter en ensretter, et kontrolkredsløb og en lineær spændingsregulator. Kontrolkredsløbet styrer via en spændingsføler en switch-transistor, som skal holde fødespændin-15 gen over ladekondensatoren så lav, at regulatoren kan arbejde. Kredsløbet er konstrueret til at arbejde med en valgt fast netspændingsforsyning.From the document US 6,169,391 B1 is known an AC / DC converter which includes a rectifier, a control circuit and a linear voltage regulator. The control circuit controls, via a voltage sensor, a switch transistor which must keep the supply voltage across the charging capacitor so low that the controller can operate. The circuit is designed to work with a selected fixed mains supply.
Formålet med opfindelsenThe object of the invention
Det er formålet med opfindelsen at tilvejebringe en strømforsyning med en 20 AC/DC-konverter, som kan tilsluttes en netspændingsforsyning med spændinger liggende i intervallet 100Vac til 690Vac, og som har en stabiliseret udgangsspænding, der er galvanisk adskilt fra forsyningsnettet.It is an object of the invention to provide a power supply with a 20 AC / DC converter which can be connected to a mains supply with voltages in the range 100Vac to 690Vac and having a stabilized output voltage which is galvanically separated from the supply network.
Det er yderligere et formål at anvise et kredsløb uden nettransformator, hvori 25 ensretterens spærrespænding og ladekondensatorens prøvespænding er relativt lav, og hvor kredsløbet kan indbygges i et industrimodul.It is a further object to provide a circuit without a power transformer in which the rectifier's cut-off voltage and the charge capacitor's test voltage are relatively low and where the circuit can be built into an industrial module.
Beskrivelse af opfindelsenDescription of the Invention
Det ovenfor anførte formål opnås med en strømforsyning som beskrevet i den 30 indledende del af krav 1, og som omfatter et indgangstrin med beskyttelse mod overbelastning og indrettet til tilslutning af netspændinger i intervallet fra 100Vac 3 DK 177225 B1 til 690Vac, et kredsløb til ensretning af forsyningsspændingen, et fasesnitkredsløb, som blokerer for spændinger fra ensretterkredsløbet, der overskrider 290V, og som bestemmer indgangsspændingen til en DC/DC-konverter, samt en DC/DC-konverter af switch-mode typen.The above object is achieved with a power supply as described in the preamble of claim 1, which comprises an input stage with protection against overload and arranged for connection of mains voltages in the range of 100Vac 3 DK 177225 B1 to 690Vac, a circuit for rectifying the supply voltage, a phase cut circuit which blocks voltage from the rectifier circuit exceeding 290V and which determines the input voltage of a DC / DC converter, as well as a switch mode DC type DC / DC converter.
55
Ved at sammenkoble indgangstrinnet, ensretterkredsløbet og fasesnitkredsløbet med en DC/DC-konverter opnår man at få en AC/DC-konverter, som kan tilsluttes netspændinger i intervallet fra 100Vac til 690Vac, og som kan levere en stabiliseret spænding til forsyning af måleudstyr og signaltransmittere. Man opnår 10 endvidere, at den stabiliserede spænding er galvanisk adskilt fra forsyningsnet tet.By connecting the input stage, rectifier circuit and phase cut circuit with a DC / DC converter you obtain an AC / DC converter which can be connected to mains voltages in the range of 100Vac to 690Vac, and which can provide a stabilized voltage for supply of measuring equipment and signal transmitters . It is further obtained that the stabilized voltage is galvanically separated from the supply grid.
Endvidere opnår man at kunne udelade en nettransformator og at kunne anvende dioder og ladekondensatorer med lave spærre- og/eller prøvespændinger, 15 hvorved der bliver plads til at bygge hele kredsløbet på printplader og anbringe disse i industrimoduler af standard type.Furthermore, it is possible to omit a mains transformer and to be able to use diodes and charge capacitors with low blocking and / or test voltages, 15 which leaves room to build the entire circuit on circuit boards and place them in standard type industrial modules.
Indgangstrinnet omfatter en modstand med sikringsfunktion, en varistor og en strømbegrænsende modstand. Herved opnår man at kunne beskytte strømforsy-20 ningen mod overspændinger eller surge-impulser opstået på forsyningsnettet.The input stage comprises a resistor with fuse function, a varistor and a current limiting resistor. This provides the ability to protect the power supply from surges or surge impulses arising on the supply network.
Ved, som anført i krav 2, at ensretterkredsløbet omfatter et sæt dioder anbragt i serie med indgangstrinnet, så opnår man at få en enkeltensretning med halvbølger af den påtrykte sinusspænding.As stated in claim 2, the rectifier circuit comprises a set of diodes arranged in series with the input stage, one obtains a single direction with half waves of the applied sine voltage.
2525
Ved, som anført i krav 3, at fasesnitkredsløbet omfatter en switch-transistor og et styrekredsløb, hvilket styrekredsløb omfatter et forspændingskredsløb, der holder switch-transistoren i en ledende tilstand, samt en optokobler og en kompara-tor til at afbryde transistorens ledende tilstand, så opnår man at kunne regulere 30 strøm og spænding til den efterfølgende DC/DC-konverter.As stated in claim 3, the phase cut circuit comprises a switch transistor and a control circuit, which control circuit comprises a bias circuit which holds the switch transistor in a conductive state, as well as an optocoupler and a comparator for interrupting the conducting state of the transistor, then you will be able to regulate 30 current and voltage to the subsequent DC / DC converter.
„ DK 177225 B1"DK 177225 B1
Ved, som anført i krav 4, at komparatorens ene indgang er tilsluttet en referencespænding, og at den anden indgang er tilsluttet den ensrettede halvbølge-spænding via en spændingsdeler, så opnår man, at komparatoren aktiverer op-tokobleren, når den neddelte halvbølgespænding overstiger referencespændin-5 gen, og afbryder switch-transistoren.As stated in claim 4, that the comparator's one input is connected to a reference voltage and the other input is connected to the unidirectional half-wave voltage via a voltage divider, the comparator activates when the divided half-wave voltage exceeds the reference voltage. -5 gene, and disconnects the switch transistor.
Ved, som anført i krav 5, at komparatoren får sin spændingsforsyning ved at lede DC/DC-konverterens strømforbrug gennem en zenerdiode og filtrere den fremkomne zenerspænding i et kapasitivt filter, så opnår man at få adgang til en for-10 syning, der ikke belaster konverterens udgange. Samtidig holdes konverterens udgange galvanisk adskilte fra forsyningsnettet.As stated in claim 5, the comparator obtains its power supply by passing the DC / DC converter power consumption through a zener diode and filtering the resulting zener voltage into a capacitive filter, so that a supply which is not available is obtained. loads the outputs of the converter. At the same time, the outputs of the converter are kept galvanically separated from the supply network.
Ved, som anført i krav 6, at DC/DC-konverteren er indrettet til at arbejde med indgangsspændinger i intervallet fra 100Vdc til 300Vdc, så opnår man at kunne 15 anvende en konverter, som er kommercielt tilgængelig.As stated in claim 6, the DC / DC converter is designed to work with input voltages in the range of 100Vdc to 300Vdc, so that it is possible to use a commercially available converter.
Ved, som anført i krav 7, at udgangene på DC/DC-konverteren er galvanisk adskilte via et kredsløb, der omfatter en switch-transformator og et optokobler, så opnår man høj isolation og sikkerhed mellem udgangene og forsyningsnettet.As stated in claim 7, the outputs of the DC / DC converter are galvanically separated via a circuit comprising a switching transformer and an optocoupler, thus achieving high isolation and safety between the outputs and the supply network.
2020
Det er endvidere hensigtsmæssigt, som anført i krav 8, at ensretterdiodernes spærrespænding ikke overstiger 1000V, og at ladekondensatorernes prøvespænding ikke overstiger 350 Vdc, så opnår man at kunne anvende komponenter med relativt små dimensioner, og at strømforsyningens areal kan nedbringes.It is further advantageous, as stated in claim 8, that the rectifier voltage of the rectifier diodes does not exceed 1000 V and that the test voltage of the charging capacitors does not exceed 350 Vdc, it is possible to use components with relatively small dimensions and that the area of the power supply can be reduced.
2525
Det er endvidere hensigtsmæssigt, som anført i krav 9, at switch-transistoren er en MOSFET switch-transistor med en maximal spænding på 1000Vdc.It is further advantageous, as stated in claim 9, that the switch transistor is a MOSFET switch transistor with a maximum voltage of 1000Vdc.
Tegningen 30 I det følgende vil et udførelseseksempel af opfindelsen blive forklaret nærmere under henvisning til tegningen, hvor: K DK 177225 B1 5 fig. 1 viser et diagram af strømforsyningen samt nogle grafer, der viser strøm eller spændinger på udvalgte punkter på diagrammet.BRIEF DESCRIPTION OF THE DRAWINGS An embodiment of the invention will now be described in more detail with reference to the accompanying drawings, in which: FIG. 1 shows a diagram of the power supply as well as some graphs showing current or voltage at selected points on the diagram.
5 Detaljeret beskrivelse af opfindelsenDetailed Description of the Invention
En strømforsyning 1 til elektronisk udstyr ifølge opfindelsen er vist på figur 1.An electronic equipment power supply 1 according to the invention is shown in Figure 1.
Fig. 1 viser, at strømforsyningen 1 omfatter et indgangstrin 2, et ensretterkredsløb 3, et fasesnitkredsløb 4 og en DC/DC-konverter 5.FIG. 1 shows that the power supply 1 comprises an input stage 2, a rectifier circuit 3, a phase cut circuit 4 and a DC / DC converter 5.
Endvidere ses graferne A - D, som viser strøm eller spændinger på udvalgte 10 steder i kredsløbet.In addition, graphs A - D are shown which show current or voltage at selected 10 locations in the circuit.
Indgangstrinnet 2 tilsluttes ved modstandene R1 og R2 til et forsyningsnet med sinusformet spænding fra 100Vac og op til 690Vac. R1 er en modstand med indbygget sikringsfunktion, og R2 virker som strømbegrænser i det tilfælde, at va-15 ristoren VR1 åbner på grund af overspænding eller en surge-impult opstået på forsyningsnettet.The input stage 2 is connected at resistors R1 and R2 to a supply network with sinusoidal voltage from 100Vac up to 690Vac. R1 is a resistor with built-in fuse function and R2 acts as a current limiter in case the VR1 resistor opens due to overvoltage or a surge impulse arising on the supply network.
I ensretterkredsløbet 3 er dioderne D1,D2 koblet til indgangstrinnet 2 og medfører en enkeltensretning af den påtrykte sinusspænding, således at der frem-20 kommer en halvbølge af form som vist på grafen A.In the rectifier circuit 3, the diodes D1, D2 are coupled to the input stage 2 and cause a single direction of the applied sine voltage, so that a half-wave of shape as shown on graph A.
Fasesnit kredsløbet 4 er opbygget omkring en switch-transistor Q1, der mest fordelagtigt kunne være en MOSFET-transistor med en max spænding på 10OOVdc.The phase cut circuit 4 is built around a switch transistor Q1 which could most advantageously be a MOSFET transistor with a maximum voltage of 10OOVdc.
2525
Via modstanden R5, zenerdioden D3 og modstanden R6 forspændes transistorens gate-source med en spænding på 12V, og er dermed ledende, så længe optokobleren U2 er afbrudt, og halvbølgen af den ensrettede netspænding har en amplitude, der forårsager, at Q1 er i ledende tilstand. Optokobleren U2 kon-30 trolleres af komparatorkredsløbet opbygget omkring den analoge forstærker U1.Via the resistor R5, the zener diode D3 and the resistor R6, the gate source of the transistor is biased by a voltage of 12V and is thus conductive as long as the optocoupler U2 is switched off and the half-wave of the rectified mains voltage has an amplitude which causes Q1 to be in conductive condition. The optocoupler U2 is controlled by the comparator circuit built around the analog amplifier U1.
6 DK 177225 B16 DK 177225 B1
Komparatorens referencespænding fås via zenerdioden D4, der via modstanden R7 er forbundet til komparatorens spændingsforsyning. D4’s zenerspænding er typisk 5,6V. Referencespændingen er tilsluttet +indgangen på den analoge forstærker. Komparatorens input signal fås fra spændingsdeleren R3,R4, således at 5 den enkeltensrettede spænding er delt ned til 5,6V, når halvbølgens topværdi er 290V (se grafen A). Komparatorens udgang er en åben kollektor, der via modstanden R8 og zenerdioden D5 tilsluttes katoden på optokobleren U2. Anoden er tilsluttet en spænding på 12V.The reference voltage of the comparator is obtained via the zener diode D4, which is connected to the voltage supply of the comparator via the resistor R7. D4's zener voltage is typically 5.6V. The reference voltage is connected + the input of the analog amplifier. The comparator input signal is obtained from the voltage divider R3, R4, so that the single rectified voltage is divided down to 5.6V when the peak value of the half-wave is 290V (see graph A). The output of the comparator is an open collector which is connected to the cathode of the optocoupler U2 via the resistor R8 and the zener diode D5. The anode is connected to a voltage of 12V.
10 Komparatorkredsløbet kræver en spændingsforsyning. Den etableres via konverterens strømforbrug, som ledes gennem zenerdioden D8. D8 giver et spændingsfald på 15 V, og zenerspændingen filtreres gennem kondensatorerne C1,C2 og dioden D9 til en spænding på 12Vdc 15 Fasesnitfunktionen er som følger: Når den enkeltensrettede halvbølges topværdi overskrider 290V, skifter komparatorens udgang (D) til lavt niveau, optokobleren U2 bliver aktiveret, dens transistorudgang bliver ledende og kortslutter gate-source på switch-transistoren Q1, hvorved denne bliver afbrudt. Dette medfører, at opladningen af ladekondensato-20 rerne C3,C4 afbrydes.10 The comparator circuit requires a power supply. It is established via the converter's power consumption, which is passed through the zener diode D8. D8 gives a voltage drop of 15 V and the zener voltage is filtered through capacitors C1, C2 and diode D9 to a voltage of 12Vdc 15 The phase cut function is as follows: When the single-directional half-wave exceeds 290V, the comparator output (D) switches to low level, the optocoupler U2 is activated, its transistor output becomes conductive and short-circuit gate-source on switch transistor Q1, thereby interrupting it. This causes the charging of the charge capacitors C3, C4 to be interrupted.
I næste halvbølge starter opladningen igen, når halvbølgen har en værdi, der er større end spændingen på ladekondensatorerne C3,C4. Når halvbølgens værdi når 290V, stopper ladningen igen. Dioden D6 spærrer for afladning af kondensa-25 torerne C3,C4 gennem fasesnitkredsløbet i pausen.In the next half wave, charging starts again when the half wave has a value greater than the voltage of the charge capacitors C3, C4. When the half-wave value reaches 290V, charging stops again. The diode D6 blocks the discharge of capacitors C3, C4 through the phase cut circuit during the pause.
Grafen B viser forløbet af ladestrømmen I i hver halvbølgeperiode. Grafen C viser spændingen på DC/DC-konverterens ladekondensatorer C3,C4. Grafen D viser udgangsspændingen på komparatoren U1 30 7 DK 177225 B1Graph B shows the course of the charge current I during each half-wave period. Graph C shows the voltage of the DC / DC converter charge capacitors C3, C4. Graph D shows the output voltage of comparator U1 30 7 DK 177225 B1
Fasesnitkredsløbet medfører, at spændingen på ladekondensatorerne ikke overskrider 280V, selv om forsyningsspændingen er op til 690Vac. Den ensrettede halvbølges topværdi er i dette tilfælde 975V, men spændingen til DC/DC-konverteren er effektivt holdt nede ved hjælp af switch-transistoren Q1.The phase cut circuit means that the voltage of the charging capacitors does not exceed 280V, even though the supply voltage is up to 690Vac. The peak value of the unidirectional half-wave is 975V in this case, but the voltage to the DC / DC converter is effectively kept down by the switch transistor Q1.
5 DC/DC-konverteren omfatter et kredsløb med en switch-transformator T1 og en optokobler U3. Begge komponenter sikrer, at der består en galvanisk adskillelse mellem konverterens 12V udgange og forsyningsnettet.The DC / DC converter comprises a circuit with a switch transformer T1 and an optocoupler U3. Both components ensure that there is a galvanic separation between the converter's 12V outputs and the supply network.
10 D7 er en transorber med en mærkespænding på 330V. Den er indsat som sik kerhed mod ødelæggelse af DC/DC-konverteren. Hvis switch-transistoren Q1 fejler og kortslutter, åbner transorberen og forårsager, at sikringsmodstanden R1 afbryder for netspændingsforsyningen.10 D7 is a transorber with a rated voltage of 330V. It is inserted as security against damage to the DC / DC converter. If the switch transistor Q1 fails and short-circuits, the transistor opens and causes the fuse resistor R1 to interrupt for the mains supply.
15 Ved den praktiske konstruktion vælges R3,R5 og R6 således, at de kan tåle den høje spænding. Typiske værdier for R3 er 1 Mohm og for R5 og R6 0,5 Mohm.In the practical construction, R3, R5 and R6 are selected so that they can withstand the high voltage. Typical values for R3 are 1 Mohm and for R5 and R6 0.5 Mohm.
Claims (10)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DKPA201001129A DK177225B1 (en) | 2010-12-01 | 2010-12-16 | AC / DC Power Supply with Phase Cut Circuit |
| PCT/DK2011/000142 WO2012072075A2 (en) | 2010-12-01 | 2011-11-29 | A power supply |
| EP11799229.7A EP2647118A2 (en) | 2010-12-01 | 2011-11-29 | A power supply |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DKPA201001089 | 2010-12-01 | ||
| DK201001089 | 2010-12-01 | ||
| DKPA201001129A DK177225B1 (en) | 2010-12-01 | 2010-12-16 | AC / DC Power Supply with Phase Cut Circuit |
| DK201001129 | 2010-12-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DK201001129A DK201001129A (en) | 2012-06-02 |
| DK177225B1 true DK177225B1 (en) | 2012-07-23 |
Family
ID=45375097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DKPA201001129A DK177225B1 (en) | 2010-12-01 | 2010-12-16 | AC / DC Power Supply with Phase Cut Circuit |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2647118A2 (en) |
| DK (1) | DK177225B1 (en) |
| WO (1) | WO2012072075A2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2775604A1 (en) * | 2013-03-07 | 2014-09-10 | Nxp B.V. | A mains power converter, and methods of operating and equipment incorporating the same |
| EP2784931B1 (en) * | 2013-03-25 | 2022-06-08 | ebm-papst Mulfingen GmbH & Co. KG | Method and control circuit for controlling a brushless electric motor |
| DE102021119739A1 (en) * | 2021-07-29 | 2023-02-02 | Truma Gerätetechnik GmbH & Co. KG | Monitoring board and system with a monitoring board |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5517402A (en) * | 1992-06-04 | 1996-05-14 | Sanden Corporation | Inverter circuit with an improved inverter driving circuit |
| JP3126565B2 (en) | 1993-11-01 | 2001-01-22 | 株式会社東芝 | AC / DC converter |
| US5587895A (en) | 1994-09-07 | 1996-12-24 | Harkins; Michael T. | Electrical power supply with single output from range of input voltages |
| US6169391B1 (en) | 1999-07-12 | 2001-01-02 | Supertex, Inc. | Device for converting high voltage alternating current to low voltage direct current |
| US7355867B2 (en) * | 2004-08-17 | 2008-04-08 | Elster Electricity, Llc | Power supply for an electric meter having a high-voltage regulator that limits the voltage applied to certain components below the normal operating input voltage |
| CN101399499A (en) * | 2007-09-26 | 2009-04-01 | 力博特公司 | Power source module with wide input voltage range |
| US8451627B2 (en) * | 2007-11-16 | 2013-05-28 | Itron, Inc. | Devices and methods for converting alternating current (AC) power to direct current (DC) power |
-
2010
- 2010-12-16 DK DKPA201001129A patent/DK177225B1/en active
-
2011
- 2011-11-29 WO PCT/DK2011/000142 patent/WO2012072075A2/en active Application Filing
- 2011-11-29 EP EP11799229.7A patent/EP2647118A2/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012072075A2 (en) | 2012-06-07 |
| WO2012072075A3 (en) | 2012-11-08 |
| DK201001129A (en) | 2012-06-02 |
| EP2647118A2 (en) | 2013-10-09 |
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