NO146454B - Inverters CLUTCH - Google Patents

Inverters CLUTCH Download PDF

Info

Publication number
NO146454B
NO146454B NO772362A NO772362A NO146454B NO 146454 B NO146454 B NO 146454B NO 772362 A NO772362 A NO 772362A NO 772362 A NO772362 A NO 772362A NO 146454 B NO146454 B NO 146454B
Authority
NO
Norway
Prior art keywords
resistor
semiconductor device
temperature
capacitor
transistor
Prior art date
Application number
NO772362A
Other languages
Norwegian (no)
Other versions
NO146454C (en
NO772362L (en
Inventor
Nils Hansson Nygaard
Original Assignee
Danfoss As
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Danfoss As filed Critical Danfoss As
Publication of NO772362L publication Critical patent/NO772362L/en
Publication of NO146454B publication Critical patent/NO146454B/en
Publication of NO146454C publication Critical patent/NO146454C/en

Links

Classifications

    • 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
    • H02M1/34—Snubber circuits
    • 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
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac 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
    • H02M7/537—Conversion of dc power input into ac 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, e.g. single switched pulse inverters
    • H02M7/5387—Conversion of dc power input into ac 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, e.g. single switched pulse inverters in a bridge configuration
    • 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
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac 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
    • H02M7/537—Conversion of dc power input into ac 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, e.g. single switched pulse inverters
    • H02M7/5387—Conversion of dc power input into ac 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, e.g. single switched pulse inverters in a bridge configuration
    • H02M7/53871—Conversion of dc power input into ac 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, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
    • 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
    • H02M1/34—Snubber circuits
    • H02M1/348—Passive dissipative snubbers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Mechanical Operated Clutches (AREA)

Description

Styrekrets for oppvarmningsanordning. Control circuit for heating device.

Foreliggende oppfinnelse angår styrekretser, nærmere bestemt styrekretser for oppvarmningsanordninger. The present invention relates to control circuits, more specifically control circuits for heating devices.

En av ulempene ved kjente styrekretser for oppvarmingsanordninger er at opp-varmingsanordningene ikke styres slik at de gir nøyaktig konstant temperatur. Ved noen operasjoner er det av mindre betyd-ning hvis den styrte temperatur avviker noe fra en ønsket verdi. Ved andre operasjoner derimot kan endog avvikelser på mindre enn 1° fra en ønsket temperatur påvirke de resultater som oppnås i operasjonen. Ut fra dette synspunkt er en av hensiktene med oppfinnelsen å skaffe en ny og forbedret styrekrets. One of the disadvantages of known control circuits for heating devices is that the heating devices are not controlled so that they provide a precisely constant temperature. In some operations, it is of less importance if the controlled temperature deviates somewhat from a desired value. In other operations, on the other hand, even deviations of less than 1° from a desired temperature can affect the results obtained in the operation. From this point of view, one of the purposes of the invention is to provide a new and improved control circuit.

Oppfinnelsen tar også sikte på å skaffe et system for styring av en oppvarmings-anordning for å holde en ønsket temperatur og å skaffe en slik styreanordning som er kompakt og nøyaktig og ikke har noen bevegelige deler. The invention also aims to provide a system for controlling a heating device to maintain a desired temperature and to provide such a control device which is compact and accurate and has no moving parts.

En utførelse av foreliggende oppfinnelse angår en styrekrets for en oppvarm-ingsanordning som har en temperaturføl-som bro som styrer operasjonen av en «unijunction» transistor. Denne «unijunction» transistor styrer igjen operasjonen av en styrbar silisiumlikeretter som er koplet i serie med oppvarmningsanordningen over en spenningstilførsel. Når den avfølte temperatur synker en brøkdel av en grad under den ønskede verdi, frembringer broen et signal som gjør «unijunction» transistoren ledende. Dette gjør at en kondensator som er koplet til «unijunction» transistoren kan utlades gjennom en resistor, hvorved der skaffes en portspenning for den styrte silisiumlikeretter. På denne måte tillates strømmen å gå gjennom oppvarmningsanordningen. An embodiment of the present invention relates to a control circuit for a heating device which has a temperature-sensitive bridge which controls the operation of a "unijunction" transistor. This "unijunction" transistor in turn controls the operation of a controllable silicon rectifier which is connected in series with the heating device via a voltage supply. When the sensed temperature drops a fraction of a degree below the desired value, the bridge produces a signal that makes the "unijunction" transistor conductive. This means that a capacitor connected to the "unijunction" transistor can be discharged through a resistor, thereby providing a gate voltage for the controlled silicon rectifier. In this way, the current is allowed to pass through the heating device.

Ytterligere hensikter og fordeler ved oppfinnelsen vil fremgå av følgende detal-jerte beskrivelse i forbindelse med tegningen som viser et koplingsskjema for styre-kretsen ifølge oppfinnelsen. Further purposes and advantages of the invention will be apparent from the following detailed description in connection with the drawing which shows a connection diagram for the control circuit according to the invention.

På tegningen er vist en brotransistor 11 hvis emitterkontakt og basiskontakt er The drawing shows a bridge transistor 11 whose emitter contact and base contact are

koplet til motsatte hjørner av en tempera-turfølsom bro 12. Broen 12 omfatter en termistor 13, et potensiometer 14, en resistor 15 og en resistor 16, idet disse kompo-nenter som vist er koplet slik at de danner en bro med konvensjonell utformning. Broen får sin driftsspenning fra en 115 volt vekselstrømkilde 19 som er tilkoplet broen over en helbølge-likeretterkrets 21 og en resistor 22. En Zener-diode 26 koplet som vist begrenser brospenningen til en egnet verdi. connected to opposite corners by a temperature-sensitive bridge 12. The bridge 12 comprises a thermistor 13, a potentiometer 14, a resistor 15 and a resistor 16, as these components are connected as shown so that they form a bridge of conventional design. The bridge receives its operating voltage from a 115 volt alternating current source 19 which is connected to the bridge via a full wave rectifier circuit 21 and a resistor 22. A Zener diode 26 connected as shown limits the bridge voltage to a suitable value.

Bro transistorens 11 kollektorkontakt er koplet over en resistor 27 til emitterkontakten på en «unijunction» transistor 28 som har en første basisklemme 29 koplet over en resistor 30 til den ene side av spenningskilden og en annen basiskontakt 31 koplet over en resistor 32 til spennings-kildens annen side. The collector contact of the bridge transistor 11 is connected via a resistor 27 to the emitter contact of a "unijunction" transistor 28 which has a first base terminal 29 connected via a resistor 30 to one side of the voltage source and another base contact 31 connected via a resistor 32 to the voltage source's other side.

En kondensator 36 koplet mellom emit-terklemmen på «unijunction» transistoren 28 og den side av spenningskilden hvor den første basiskontakt 29 er tilkoplet, påtryk-kes signaler fra brotransistoren 11 for å gjøre transistoren 28 ledende. Når der kreves ytterligere oppvarmning leder transistoren 11 slik at kondensatoren 36 opplades over motstanden eller resistoren 27. Lad-ningen bygger seg opp over kondensatoren 36 til spenningen over kondensatoren er tilstrekkelig høy til å utløse transistoren 28. Når dette inntreffer, synker motstanden mellom emitterkontakten på transistoren 28 og den første basiskontakt 29 til i det vesentlige 0, og gir kondensatoren 36 anledning til å lade seg ut over motstanden eller resistoren 30. Derved dannes en portspenning over resistoren 30. A capacitor 36 connected between the emitter terminal of the "unijunction" transistor 28 and the side of the voltage source where the first base contact 29 is connected, signals from the bridge transistor 11 are applied to make the transistor 28 conductive. When additional heating is required, the transistor 11 conducts so that the capacitor 36 is charged across the resistor or resistor 27. The charge builds up across the capacitor 36 until the voltage across the capacitor is sufficiently high to trigger the transistor 28. When this occurs, the resistance between the emitter contact drops on the transistor 28 and the first base contact 29 to essentially 0, and gives the capacitor 36 the opportunity to discharge itself across the resistance or resistor 30. Thereby a gate voltage across the resistor 30 is formed.

Forbindelsespunktet mellom den første basiskontakt 29 og resistoren 30 er koplet til basiskontakten for en styrt silisiumlikeretter 38, som er koplet i serie med en oppvarmningsanordning 39 over en spen-ningskilde 19, som det fremgår av koplings-skjemaet. Portspenningen over resistoren 30 utløser den styrte silisiumlikeretter 38 og gjør den ledende slik at strømmen kan gå gjennom oppvarmingsanordningen 39 og heve den temperatur som skal styres. The connection point between the first base contact 29 and the resistor 30 is connected to the base contact for a controlled silicon rectifier 38, which is connected in series with a heating device 39 across a voltage source 19, as can be seen from the connection diagram. The gate voltage across the resistor 30 triggers the controlled silicon rectifier 38 and makes it conductive so that the current can pass through the heating device 39 and raise the temperature to be controlled.

Hvis broens likevektsforhold forstyrres forandres brotransistorens 11 ledningsforhold, idet broen kommer ytterligere ut av balanse når der kreves mer varme. Brotransistorens 11 ledningsforhold bestem-mer kondensatorens 36 oppladningshastig-het. Denne oppladningshstighet bestem-mer ledningsperioden for transistoren 28 i hver halvperiode av den på denne påtrykte spenning. Denne styrer igjen ledningen for den styrte silisiumlikeretter 38 som kopler oppvarmningsanordningen 39 til spenningskilden. If the bridge's equilibrium conditions are disturbed, the conduction conditions of the bridge transistor 11 change, as the bridge becomes further out of balance when more heat is required. The conduction ratio of the bridge transistor 11 determines the charging speed of the capacitor 36. This charging speed determines the conduction period of the transistor 28 in each half period of the voltage applied to it. This in turn controls the line for the controlled silicon rectifier 38 which connects the heating device 39 to the voltage source.

Kretsen tilfører således ikke kontinu-erlig effekt til oppvarmningsanordningen til den ønskede temperatur er nådd, men avpasser driften av oppvarmningsanordningen i samsvar med den varmemengde som er påkrevet for å heve den styrte tem-pertur til den ønskede verdi. Med andre ord, når den styrte temperatur nærmer seg den ønskede verdi, avtar ledningsperioden for likeretteren 38 under hver halvperiode av den påtrykte spenning. På denne måte bringes den styrte temperatur jevnt opp til den ønskede verdi og går ikke forbi denne. Dette fører til en meget nøyaktig og om-hyggelig styring av temperaturen. The circuit thus does not supply continuous power to the heating device until the desired temperature is reached, but adapts the operation of the heating device in accordance with the amount of heat required to raise the controlled temperature to the desired value. In other words, as the controlled temperature approaches the desired value, the conduction period of the rectifier 38 decreases during each half period of the applied voltage. In this way, the controlled temperature is brought evenly up to the desired value and does not go beyond this. This leads to a very precise and pleasant control of the temperature.

Kretsens følsomhet kan innstilles ved justering av potensiometeret 14slik at dette forandrer ledningshastigheten for kondensatoren 36. Derved justeres den verdi, hvor-til den styrte temperatur heves. Det her viste system skaffer en nøyaktig og omhyg-gelig styring av oppvarmningsanordningen, slik at en temperatur holdes innenfor nøyaktige grenser. Da der ikke foreligger noen bevegelige deler eller vanlige elek-tronrør er systemets levetid betydelig for-lenget. The sensitivity of the circuit can be adjusted by adjusting the potentiometer 14 so that this changes the conduction speed of the capacitor 36. This adjusts the value to which the controlled temperature is raised. The system shown here provides accurate and careful control of the heating device, so that a temperature is kept within precise limits. As there are no moving parts or ordinary electron tubes, the system's lifetime is significantly extended.

Claims (5)

1. Styrekrets for oppvarmningsanordning, omfattende en temperaturfølsom innretning, en oppvarmningsanordning og en anordning som er følsom for et signal fra den temperaturfølsomme innretning for tilførsel av strøm til oppvarmningsanordningen fra en kraftkilde, karakterisert ved en første halvlederinnretning (38) anordnet i serie mellom oppvarmingsanordningen (39) og krafttilførselen (19), en første motstand (27) koblet i sig-nalmottagende forhold til den temperatur-følsomme innretning (12), en kondensator (36) tilkoblet mellom den første motstand (27) og den ene siden av spenningstilfør-selen, en annen halvlederinnretning (28), hvis inngang er tilkoblet skjøten mellom den første motstand (27) og kondensatoren (36), en annen motstand tilkoblet den annen halvlederinnretnings (28) utgang, idet kondensatoren (36) utlades gjennom den annen motstand (30) når den annen halvlederinnretning (28) er ledende og den før-ste halvlederinnretnings (38) styreelektro-de er tilkoblet skjøten mellom den annen motstand (30) og en elektrode (29) i den annen halvlederinnretning (28').1. Control circuit for a heating device, comprising a temperature-sensitive device, a heating device and a device which is sensitive to a signal from the temperature-sensitive device for supplying current to the heating device from a power source, characterized by a first semiconductor device (38) arranged in series between the heating device ( 39) and the power supply (19), a first resistor (27) connected in signal-receiving relation to the temperature-sensitive device (12), a capacitor (36) connected between the first resistor (27) and one side of the voltage supply the harness, another semiconductor device (28), the input of which is connected to the junction between the first resistor (27) and the capacitor (36), another resistor connected to the output of the second semiconductor device (28), the capacitor (36) being discharged through the second resistor ( 30) when the second semiconductor device (28) is conductive and the control electrode of the first semiconductor device (38) is connected to the joint between the another resistor (30) and an electrode (29) in the second semiconductor device (28'). 2. Styrekrets ifølge påstand 1, karakterisert ved at den første halvlederinnretning (38) er en styrt silisiumlikeretter.2. Control circuit according to claim 1, characterized in that the first semiconductor device (38) is a controlled silicon rectifier. 3. Styrekrets ifølge påstand 1 og 2, karakterisert ved at den annen halvlederinnretning (28) er en «unijunction» transistor.3. Control circuit according to claims 1 and 2, characterized in that the second semiconductor device (28) is a "unijunction" transistor. 4. Styrekrets ifølge hvilken som helst av de foregående påstander, karakterisert ved at en spenningsbegrensende diode (26) er koblet i serie med en tredje motstand (22) over den første halvlederinnretning (38) og at den temperaturføl-somme anordning er en i og for seg kjent brokrets (12) koblet over dioden (26).4. Control circuit according to any one of the preceding claims, characterized in that a voltage-limiting diode (26) is connected in series with a third resistor (22) across the first semiconductor device (38) and that the temperature-sensitive device is an i and per se known bridge circuit (12) connected across the diode (26). 5. Styrekrets ifølge hvilken som helst av de foregående påstander, karakterisert ved at den første motstand (27) og kondensatoren (36) er tilkoblet den temperaturfølsomme anordning (12) over en transistor (11).5. Control circuit according to any one of the preceding claims, characterized in that the first resistor (27) and the capacitor (36) are connected to the temperature-sensitive device (12) via a transistor (11).
NO772362A 1976-07-19 1977-07-04 Inverters CLUTCH NO146454C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2632381A DE2632381B2 (en) 1976-07-19 1976-07-19 Inverter circuit

Publications (3)

Publication Number Publication Date
NO772362L NO772362L (en) 1978-01-20
NO146454B true NO146454B (en) 1982-06-21
NO146454C NO146454C (en) 1982-09-29

Family

ID=5983361

Family Applications (1)

Application Number Title Priority Date Filing Date
NO772362A NO146454C (en) 1976-07-19 1977-07-04 Inverters CLUTCH

Country Status (8)

Country Link
JP (1) JPS5312028A (en)
AU (1) AU511374B2 (en)
DE (1) DE2632381B2 (en)
DK (1) DK312077A (en)
FR (1) FR2359540A1 (en)
GB (1) GB1588135A (en)
NO (1) NO146454C (en)
SE (1) SE7708282L (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4310866A (en) * 1979-09-28 1982-01-12 Borg-Warner Corporation Shootthrough fault protection system for bipolar transistors in a voltage source transistor inverter
JPS5715693U (en) * 1980-06-30 1982-01-27
JPS5992230U (en) * 1982-12-14 1984-06-22 明立精機株式会社 Air spring height control device
US4594650A (en) * 1983-04-19 1986-06-10 Mitsubishi Denki Kabushiki Kaisha Inverter device
DE3429488A1 (en) * 1984-08-10 1986-02-20 Danfoss A/S, Nordborg ELECTRONIC SWITCHING DEVICE

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3737755A (en) * 1972-03-22 1973-06-05 Bell Telephone Labor Inc Regulated dc to dc converter with regulated current source driving a nonregulated inverter

Also Published As

Publication number Publication date
JPS5628104B2 (en) 1981-06-29
JPS5312028A (en) 1978-02-03
DE2632381B2 (en) 1980-10-30
NO146454C (en) 1982-09-29
DK312077A (en) 1978-01-20
NO772362L (en) 1978-01-20
SE7708282L (en) 1978-01-20
DE2632381A1 (en) 1978-01-26
AU2706277A (en) 1979-01-18
FR2359540A1 (en) 1978-02-17
GB1588135A (en) 1981-04-15
AU511374B2 (en) 1980-08-14

Similar Documents

Publication Publication Date Title
US3149224A (en) Heater control circuit
US3136877A (en) Electronic thermostatic system
US2767293A (en) Temperature control system
US3175077A (en) Electrical heater control system
US2819371A (en) Heating apparatus
US3943326A (en) Temperature control circuit for a hand held soldering tool
US3408940A (en) Flow control circuit
US3478532A (en) Electronic head pressure control for condensing units
US3590365A (en) Temperature control apparatus
US2975260A (en) Electrical heater control circuits
NO146454B (en) Inverters CLUTCH
US3413438A (en) Solid state temperature control circuit
US3235711A (en) Control circuit
US1859765A (en) Thermostatically controlled electric circuit
US3456095A (en) Solid state temperature control circuit with anticipation and compensation features
US2897331A (en) Temperature control device
US3987318A (en) Adjustable temperature actuated switching apparatus
US2544031A (en) Thermocouple auxiliary amplifier for controlling heating apparatus
US3419214A (en) Temperature regulating system
US3943331A (en) Temperature control circuit
US3553430A (en) Control system and apparatus for a heating station
US3274375A (en) Thermostatic oven controller with automatic reset
US3489883A (en) Proportional heat controller
US3349223A (en) Oven temperature control stabilizing network
US4055296A (en) Electronic temperature control system for thermostatic control