NO820172L - Fremgangsmaate for regulering av krafttilfoerselen til en likestroemmotor og en innretning for anvendelse av fremgangsmaaten - Google Patents
Fremgangsmaate for regulering av krafttilfoerselen til en likestroemmotor og en innretning for anvendelse av fremgangsmaatenInfo
- Publication number
- NO820172L NO820172L NO820172A NO820172A NO820172L NO 820172 L NO820172 L NO 820172L NO 820172 A NO820172 A NO 820172A NO 820172 A NO820172 A NO 820172A NO 820172 L NO820172 L NO 820172L
- Authority
- NO
- Norway
- Prior art keywords
- stage
- signal
- motor
- reference value
- regulator
- Prior art date
Links
- 230000001105 regulatory effect Effects 0.000 title claims description 8
- 238000000034 method Methods 0.000 title claims description 6
- 230000001276 controlling effect Effects 0.000 claims description 4
- 230000000717 retained effect Effects 0.000 claims description 4
- 230000010355 oscillation Effects 0.000 claims 3
- 230000001419 dependent effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 239000003990 capacitor Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
- H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
- H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
- H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
- H02P7/285—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only
- H02P7/29—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using pulse modulation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
- H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
- H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
- H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
- H02P7/285—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only
- H02P7/29—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using pulse modulation
- H02P7/2913—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using pulse modulation whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S388/00—Electricity: motor control systems
- Y10S388/907—Specific control circuit element or device
- Y10S388/915—Sawtooth or ramp waveform generator
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Direct Current Motors (AREA)
- Control Of Electric Motors In General (AREA)
- Control Of Stepping Motors (AREA)
- Control Of Multiple Motors (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Electrophonic Musical Instruments (AREA)
- Massaging Devices (AREA)
- Dc-Dc Converters (AREA)
Description
Foreliggende oppfinnelse angår en. fremgangsmåte for regulering av strømtettheten og spenningen tilført en like-strømmotor i forhold til en på forhånd bestemt referanseverdi ved å modifisere krafttilførselen til motoren.
Oppfinnelsen angår videré en innretning til utfør-else av fremgangsmåten.
Det er kjent at hastigheten for en motor av denne type er avhengig av den tilførte spenning og at det dreie-moment som utøves av motoren, er avhengig av strømtettheten.
I det tilfelle som særlig kommer til anvendelse ifølge oppfinnelsen og hvor motoren overfører bevegelse ved hjelp av en egnet reduksjons-tannhjulsveksel for å utføre forskyvnin-gen av et mekanisk element såsom en dør, en komponent i et maskinverktøy eller kjøreinnretningen for et håndterings-apparat, fremkommer et dobbelt problem.
Det er for det første nødvendig å sikre at opera-sjonen finner sted uten rykk, særlig ved slutten av bevegelsen. For det annet må låsing ved slutten av bevegelsen ikke gi foranledning til overstrøm inne i motoren.
For å løse dette problem med dobbelt styring er det en kjent praksis å anvende en dobbelt styresløyfe i en lukkét krets, hvor en sløyfe anvender en strømtetthets-komparator og hvor den annen sløyfe anvender en spenningskomparator.
For å sikre effektiv regulering av motorens hastighet omfatter styrekretsen en tacho-dynamo festet med. kile på motorens drivaksel.
Denne konstruktive utførelse fører til for stor vekt
såvel som særlig stor kapitalinvestering.
Formålet med foreliggende oppfinnelse er å skaffe tilveie en fremgangsmåte med dobbelt styring, hvilken er ut-ført ved hjelp av særlig enkel konstruksjon.
Dette resultat er oppnådd i samsvar med oppfinnelsen ved utførelse av følgende operasjoner: a) Spenningen og strømtettheten omvandles i samsvar med den samme målestokk for en representativ kvantitet, b) de to omvandlede kvantiteter sammenlignes med hverandre og den større kvantitet bibeholdes, c) den bibeholdte verdi sammenlignes med referanseverdien for å definere et differansesignal for styring av en
tilførselsgénerator.
Denne anordning tillater brukén av en enkelt styrekrets, hvori den kvantitet som skal styres, er enten strøm-tettheten eller spenningen, idet valget foretas ved sammenligning av disse to kvantiteter med hverandre etter at de er blitt omvandlet i samsvar med den samme målestokk som en representativ hjelpekvantitet.
I samsvar med et annet trekk ved oppfinnelsen omfatter en innretning for regulering av strømtettheten og spenningen tilført en likéstrømmotor en regulator med proporsjonal og integrert virkning for styring av et kraftstyretrinn, og et trinn som tjener til å frembringe en referanseverdi og er koblet til regulatoren gjennom et sammenligningstrinn. Oppfinnelsen omfatter hovedsakelig to følere av omvandlertypen for måling hhv. av den tilførte strømtetthet og spenning og omvandling av disse til signaler i samsvar med den samme målestokk for en representativ kvantitet,, og et sammenlignings- og brytertrinn for valg av det signal som har den største verdi, idet utgangen av nevnte trinn er koblet til trinnet for sammenligning med referanseverdien.
Ytterligere trekk ved oppfinnelsen vil fremgå ved hjelp av følgende beskrivelse og tegningene,, hvor fig. 1 er et generelt skjema for en reguleringsinnretning i samsvar med oppfinnelsen, fig. 2 er et detaljskjema for sammenlignings- og brytertrinnet, fig. 3 er et detaljskjema for regulatoren, fig. 4 er et detaljskjema for oscillatoren, fig. 5 er et skjema som viser signalet utsendt av oscillatoren,
fig. 6 er et skjema for komparatoren,. fig. V er et detaljskjema for kraftstyretrinnet, fig. 8 er et bølgeformskjerna som tjener til å forklare innretningens funksjon, og fig. 9 er et detaljskjema for den logiske styrekrets.
Med henvisning til fig. 1 er en motor 1 forsynt gjennom et kraftstyretrinn 2 fra et akkumulatorbatteri med posi-tive og negative plater. Kraftstyretrinnet er koblet til en. logisk styreenhet 3 som skal beskrives senere mer detaljert. En strømtetthetsføler 4 av omvandlertypen er koblet over klemmene på en motstand 5 i serie med motoren 1 og en spen-ningsføler 6 av omvandlertypen er montert over klemmene på det utstyr som består av motoren 1 og motstanden 5.
Følerne av omvandlertypen (i det følgende betegnet omvandlere) er innrettet for å levere ved sin utgang en spenning som er representativ for den målte kvantitet i samsvar med en målestokk på 6-12 V.
Utgangene fra omvandlerne er påtrykt inngangen til et sammenlignings- og velgertrinn 7 som omfatter en komparator 8 (som vist på fig. 2) på hvilken de to signaler påtrykkes. Komparatoren leverer et signal med nivå "1" hvis strømtetthetssignalet har høyere verdi enn spenningssignalet og et signal med nivå "0" hvis dette ikke er tilfellet. Komparatorens 8 utgang er parallellkoblet med en inngang til en OG-port 9 som strømtetthetssignalet også påtrykkes og med en reverseringsinngang for en OG-port 11 som spenningssignalet også er påtrykt. Utgangene for de nevnte por-ter er parallellkoblet for å danne utgangen av trinnet 7.
Det er klart at utgangssignalet fra trinnet 7 til-svarer et av de to inngangssignaler, nemlig det signal som har den høyeste verdi.
Utgangssignalet påtrykkes en inngang til et sammenligningstrinn 12, en annen inngang på dette er koblet til et genereringstrinn 13 for en referanseverdi, av potensio-metertrypen som på sin side er koblet til den logiske styreenhet 3.
Den logiske styreenhet 3 omfatter et første tidsstyretrinn T1, på hvilket påføres et signal 17 frembragt ved stillingen av det mekaniske element som forskyves ved hjelp av motoren 1. Trinnet T1 driver parallelt et trinn 14 for å bestemme dreieretningen for motoren 1 (ved hjelp av en transistor 15) og et annet tidsstyretrinn T2. Trinnet T2 driver parallelt en inngang 41a på kraftstyretrinnet 2 (ved hjelp av en transistor 16), og et tredje tidsstyretrinn T3, hvis utgang driver genereringstrinnet 13 for referanseverdien. Det nevnte trinn 13 omfatter en potensiometerkrets som mates ved 6V for å bestemme referanseverdiene i samsvar med en målestokk på 6-12 V.
Utgangen fra sammenligningstrinnet 12 (som i virkeligheten er en subtraksjonskrets) er koblet til inngangen på en regulator 18 med proporsjonal og integrert virkning for å påtrykke sistnevnte et differansesignal A, hvilket signal alltid er definert ved en spenning som varierer mellom 6 og 12 V (se kurven a på fig. 8).
Regulatoren 18 omfatter en forsterker 19 som drives ved hjelp av en motstand 21 og omfatter en negativ tilbake-koblingssløyfe bestående av en motstand 22 seriekoblet med en kondensator 23.
Utgangssignalet B fra regulatoren er proporsjonalt med differansesignalet som en følge av virkningen av mot-standene 21, 22 for å skaffe øyeblikkelig svekking av eventuelle hurtige variasjoner i den kvantitet som skal reguleres. Takket være kondensatoren 23 er det på nevnte signal overlagret en virkning som er proporsjonal med integralet av differansen med hensyn til tiden som søker å korrigere langsomme variasjoner.
Regulatoren 18 er konstruert på en slik måte at den gir et utgangssignal som varierer mellom -0,75 V og + 0,75 V når differansesignalet varierer mellom sine yttergrenser.
Utgangen fra regulatoren 18 er koblet til en inngang 24 på en komparator 25, hvis annen inngang. 26 er koblet til utgangen fra en oscillator 27.
Denne oscillator omfatter en forsterker 28 (som
vist på fig. 4), hvis utgang er koblet til referanseinngan-gen over en negativ tilbakekoblingssløyfe som omfatter en motstand 29. Signalinngangen 31 er koblet -til den annen inngang for forsterkeren over en kondensator 32 og utgangen fra forsterkeren er koblet til nevnte inngang over en variabel motstand 33. Utgangssignalet er koblet mellom inngangen til forsterkeren og den variable motstand 33.
Ved hjelp av denne anordning fås et sagtannsignal
C ved utgangen fra oscillatoren, som vist på fig. 5. I det her beskrevne eksempel er amplituden for dette signal - 0,75 V (se kurve c på fig. 8) og frekvensen for dette signal er 1 kHz.
Komparatoren 25 (vist på fig. 6) omfatter en forsterker 34, hvis utgang er koblet parallelt over en spen-ningsdeler bestående av to motstander 35, 36 med basis på en transistor 37 montert med en fellesemitterkbbling og til kollektoren på nevnte transistor over en kondensator 38. Denne anordning tjener til å få ved utgangen et signal D på 5 V som er enten positivt eller negativt avhengig av hvor-vidt sagtannsignalet C er respektive høyere eller lavere enn utgangssignalet B fra regulatoren 18 (se kurve d på fig. 8).
Det nevnte signal tilføres basis for en transistor 39 som er montert med en fellesemitterkobling og gir på sin kollektor et omvendt og likerettet signal E (se kurve e) på fig. 8.
Signalet E tilføres en inngang 41 på kraftstyretrinnet 2, hvis annen inngang 4 2 er koblet til batteriets negative pol.
Inngangen 41 er koblet til basis på en transistor 43, hvis emitter er koblet for det første til den negative gren over en motstand 44 og for det annet til basis på en transistor 45, hvis emitter er koblet til nevnte negative gren. Kollektorene på de to transistorer er koblet til utgangen 46 fra trinnet 2 og en Zenerdiode 4 7 forbinder nevnte utgang med den negative gren.
Denne kretsanordning gjør det mulig å få ved utgangen en avbrutt spenningsbølgeform F (se kurven f på fig. 8) som tjener til å forsyne motoren. I virkeligheten er inngangen 41 den samme som inngangen 41a, på hvilken derfor er overlagret det signal som utsendes av den logiske styreenhet 3 og det avbrutte signal E.
I det her beskrevne eksempel gjør innretningen det mulig ved bølgeavbrytelse å mate motoren 1 i normal drift ved maksimal hastighet og ved en spenning på 57 V fra et 72-volt batteri.
Ved anvendelsen startes motoren 1 ved hjelp av den logiske styreenhet 3. Etter et tidsintervall t^ definert ved hjelp av trinnet T1, blir dreieretningen for motoren definert ved hjelp av trinnet 14. Deretter, etter et ytterligere tidsintervall t2definert av trinnet T2, blir kraftstyretrinnet 2 energisert. Etter et.avsluttende tidsintervall t3definert ved trinnet T3, blir referanseverdien generert.
Under drift av motoren, hvis strømtettheten skulle øke som en følge av f.eks. låsing, velger sammenlignings- og brytertrinnet 7 denne verdi som den kvantitet som skal reguleres, og sammenligningstrinnet 12 leverer differansesignalet A. Regulatoren 18 leverer en virkning B som er større når differansesignalet har en høyere verdi. Da denne virkning B er sterkere, er den periode, under hvilken den er lavere enn sagtannsignalet, kortere (som vist på fig. 8). Dette har den virkning at det reduserer tidsvarigheten for pulsene i signalet D og endelig å redusere periodene med strøm i motoren i forhold til periodene med strømavbrytelse.
Den styrte variable eller regulerte kvantitet kan også være den spenning som påtrykkes motoren. Særlig når det mekaniske element som forskyves av motoren, kommer tett inntil slutten av sin bevegelse, har signalet 17 påført fjernstyringsenheten den virkning å redusere referanseverdien og regulatoren gir en virkning som søker å redusere den spenning som påtrykkes motoren og derfor å redusere motorens hastighet.
Det vil lett forstås at oppfinnelsen ikke er be-grenset til det ovenfor beskrevne eksempel men strekker seg til eventuelle alternative anordninger innenfor kapasiteten av hvem som helst som er kjent på området, særlig med hensyn til anordningen av de elektriske kretser.
Claims (6)
1. Fremgangsmåte til .regulering av strømtettheten og spenningen tilført en likestrømmotor i forhold til en på forhånd bestemt referanseverdi ved å modifisere kraft-tilførselen til motoren, karakterisert ved utførelsen av følgende operasjoner:
a) spenningen og strømtettheten omvandles i samsvar med den samme målestokk for en representativ kvantitet,
b) de to omvandlede kvantiteter sammenlignes med hverandre og den større kvantitet bibeholdes,
c) den bibeholdte verdi sammenlignes med referanseverdien for å definere et differansesignal for styring av en tilførselsregulator.
2. Innretning til regulering av strømtetthet og spenning tilført en likestrømmotor, karakterisert ved en regulator med proporsjonal og integrert virkning for styring av et kraftstyretrinn, og et trinn som tjener til å gi en referanseverdi og er koblet til regulatoren gjennom-et sammenligningstrinn, idet innretningen omfatter to følere av omvandlertypen for måling henholdsvis av den tilførte strømtetthet og spenning og omvandle dem til signaler i samsvar med den samme målestokk for en representativ kvantitet, og et sammenlignings- og brytertrinn for valg av det signal som har den høyeste verdi, idet utgangen fra nevnte trinn er koblet til trinnet for sammenligning med referanseverdiene.
3. Innretning ifølge krav 2, karakteris-, ert ved at den omfatter en komparator, hvis innganger er koblet til de respektive utganger fra regulatoren og en generator for å produsere isokrone svingninger, og hvis ut- . gang er koblet til et kraftstyretrinn.
4. Innretning ifølge krav 3, karakterisert ved at oscillasjonsgeneratoren er innrettet for å gi sagtannsvingninger.
5. Innretning ifølge krav 2, karakteris-, ert ved at den omfatter en logisk styreenhet koblet til trinnet for generering av referanseverdien og til kraftstyretrinnet.
6. Innretning ifølge krav 5, karakterisert ved at den logiske styreenhet har en inngang for et programmeringssignal for en referanseverdi, hvilket signal er avhengig av posisjonen av et mekanisk element som drives av motoren.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8102639A FR2499782A1 (fr) | 1981-02-11 | 1981-02-11 | Procede pour regler l'alimentation d'un moteur a courant continu et dispositif pour sa mise en oeuvre |
Publications (1)
Publication Number | Publication Date |
---|---|
NO820172L true NO820172L (no) | 1982-08-12 |
Family
ID=9255064
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO820172A NO820172L (no) | 1981-02-11 | 1982-01-20 | Fremgangsmaate for regulering av krafttilfoerselen til en likestroemmotor og en innretning for anvendelse av fremgangsmaaten |
Country Status (12)
Country | Link |
---|---|
US (1) | US4468597A (no) |
EP (1) | EP0058609B1 (no) |
AT (1) | ATE9525T1 (no) |
BR (1) | BR8200717A (no) |
CA (1) | CA1174270A (no) |
DK (1) | DK26482A (no) |
ES (1) | ES509063A0 (no) |
FI (1) | FI820340L (no) |
FR (1) | FR2499782A1 (no) |
NO (1) | NO820172L (no) |
PT (1) | PT74350B (no) |
ZA (1) | ZA82413B (no) |
Families Citing this family (389)
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JPS6017364A (ja) * | 1983-07-11 | 1985-01-29 | Fanuc Ltd | 電動機速度検出方式 |
NZ207431A (en) * | 1984-03-08 | 1989-03-29 | Fisher & Paykel | Pulse with modulation controls current in dc motor |
FR2573261A1 (fr) * | 1984-11-12 | 1986-05-16 | Mod Sa | Procede et dispositif pour reguler la vitesse d'un moteur a courant continu, notamment un moteur de machine a coudre |
US4839570A (en) * | 1988-04-27 | 1989-06-13 | K. B. Electronics Inc. | Current limiting control circuit for d.c. motors |
EP0691731A1 (en) * | 1994-06-10 | 1996-01-10 | Omron Corporation | DC motor control circuit |
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US3230440A (en) * | 1962-04-02 | 1966-01-18 | North American Aviation Inc | Power supply with short circuit protection |
US3295316A (en) * | 1964-06-10 | 1967-01-03 | United Aircraft Corp | Speed overshoot limiter for fuel controls |
CH432631A (de) * | 1966-01-26 | 1967-03-31 | Siemens Ag Albis | Spannungsgeregeltes Gleichspannungsgerät |
US3443189A (en) * | 1967-03-24 | 1969-05-06 | Benjamin F Gilbreath | Motor control and overload protection |
US3538426A (en) * | 1968-02-06 | 1970-11-03 | Elgin Electronics | Series regulator with current limiter |
JPS513044B1 (no) * | 1969-11-14 | 1976-01-30 | ||
JPS5320083B2 (no) * | 1972-05-25 | 1978-06-24 | ||
US3727103A (en) * | 1972-06-30 | 1973-04-10 | Gen Electric | Three phase system monitoring and control circuit |
US4180768A (en) * | 1978-07-20 | 1979-12-25 | Tele/Resources, Incorporated | Energy limiting foldback circuit for power supply |
-
1981
- 1981-02-11 FR FR8102639A patent/FR2499782A1/fr active Granted
-
1982
- 1982-01-20 NO NO820172A patent/NO820172L/no unknown
- 1982-01-21 DK DK26482A patent/DK26482A/da not_active Application Discontinuation
- 1982-01-21 ZA ZA82413A patent/ZA82413B/xx unknown
- 1982-01-22 US US06/342,192 patent/US4468597A/en not_active Expired - Lifetime
- 1982-01-26 ES ES509063A patent/ES509063A0/es active Granted
- 1982-01-27 CA CA000395049A patent/CA1174270A/en not_active Expired
- 1982-01-28 PT PT74350A patent/PT74350B/pt not_active IP Right Cessation
- 1982-02-03 FI FI820340A patent/FI820340L/fi not_active Application Discontinuation
- 1982-02-10 AT AT82400240T patent/ATE9525T1/de not_active IP Right Cessation
- 1982-02-10 EP EP82400240A patent/EP0058609B1/fr not_active Expired
- 1982-02-10 BR BR8200717A patent/BR8200717A/pt unknown
Also Published As
Publication number | Publication date |
---|---|
FI820340L (fi) | 1982-08-12 |
ES8302381A1 (es) | 1982-12-16 |
CA1174270A (en) | 1984-09-11 |
BR8200717A (pt) | 1982-12-21 |
EP0058609B1 (fr) | 1984-09-19 |
US4468597A (en) | 1984-08-28 |
FR2499782A1 (fr) | 1982-08-13 |
ES509063A0 (es) | 1982-12-16 |
EP0058609A1 (fr) | 1982-08-25 |
DK26482A (da) | 1982-08-12 |
ATE9525T1 (de) | 1984-10-15 |
PT74350A (fr) | 1982-02-01 |
PT74350B (fr) | 1983-08-24 |
ZA82413B (en) | 1982-12-29 |
FR2499782B1 (no) | 1984-09-21 |
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