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exported equivalent COPI_0000086
Transformer
IRI: https://www.inf.ufrgs.br/ontologies/copi/COPI_0000086
Generated onGerado em 2026-04-15
Natural Language DefinitionDefinição em Linguagem Natural
EN
A transformer is an electrical equipment that transforms electrical power from one circuit to another at the same frequency through electromagnetic induction using windings and a magnetic core.
PT-BR
Um transformador é um equipamento elétrico que transforma energia elétrica de um circuito para outro na mesma frequência através de indução eletromagnética usando enrolamentos e um núcleo magnético.
Formal AxiomsAxiomas Formais
Semi-formal (Aristotelian)Semi-formal (Aristotélico)
Every transformer is an electrical equipment that bears an electrical power transformation function and has component parts including primary winding, secondary winding, and magnetic core.
First-Order Logic TheoryTeoria em Lógica de Primeira Ordem
[Definition]∀x (Transformer(x) ↔ Assembly(x) ∧ ∃f (ElectricalPowerTransformationFunction(f) ∧ bearerOf(x,f)) ∧ ∃bearerOf.ElectricalPowerTransformationFunction ⊓ ∃hasComponentPartAtAllTimes.TransformerWinding ⊓ ∃hasComponentPartAtAllTimes.MagneticCore) — Steps 1–3: genus + identity-giving function [Function axiom: ElectricalPowerTransformationFunction]∀f (ElectricalPowerTransformationFunction(f) → ∀p (realizedIn(f,p) → ElectricalPowerTransformationProcess(p)) ∧ ∃p (ElectricalPowerTransformationProcess(p) ∧ realizedIn(f,p))) — Step 1: ∀ preserves type-type identity; ∃ rules out vacuous functions never realised [Process participation signature]∀x ∀f ((Transformer(x) ∧ ElectricalPowerTransformationFunction(f) ∧ bearerOf(x,f)) → processType(f,ElectricalPowerConversion)) — Step 5: typed participants in the realising process
OWL 2 / Turtle
@prefix copi: <https://www.inf.ufrgs.br/ontologies/copi/> . @prefix : <https://www.inf.ufrgs.br/ontologies/copi/> . @prefix owl: <http://www.w3.org/2002/07/owl#> . @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> . @prefix xsd: <http://www.w3.org/2001/XMLSchema#> . @prefix bfo: <http://purl.obolibrary.org/obo/> . @prefix iof-core: <https://spec.industrialontologies.org/ontology/construct/> . @prefix iof-av: <https://spec.industrialontologies.org/ontology/annotation/> . @prefix skos: <http://www.w3.org/2004/02/skos/core#> . @prefix qudt: <http://qudt.org/schema/qudt/> . @prefix dcterms: <http://purl.org/dc/terms/> . @prefix foaf: <http://xmlns.com/foaf/0.1/> . @prefix apv: <http://inf.ufrgs.br/ontologies/apv#> . ### COPI — Core Ontology for Petroleum Installations ### Class module: Transformer <https://www.inf.ufrgs.br/ontologies/copi> rdf:type owl:Ontology ; dcterms:title "Core Ontology for Petroleum Installations (COPI)"@en ; dcterms:title "Ontologia Core para Instalações de Petróleo (COPI)"@pt-br ; dcterms:description "BFO/IOF-Core conformant ontology of equipment classes for petroleum production plants, developed using the five-step RDL enrichment method."@en ; skos:scopeNote "Material artifacts (bfo:material_entity) that (i) are part of a petroleum production plant, and (ii) bear at least one function whose realization involves the transport (e.g. production and injection), processing (separation and other processes), control, monitoring, measurement, containment or offloading of material or energy."@en ; skos:scopeNote "Artefatos materiais (bfo:material_entity) que (i) fazem parte de uma planta de produção de petróleo, e (ii) possuem ao menos uma função cuja realização envolve o transporte (p. ex. produção e injeção), processamento (separação e outros processos), controle, monitoramento, medição, contenção ou escoamento de material ou energia."@pt-br ; skos:scopeNote "COPI provides high-level equipment categories defined by function to demonstrate the defined-class mechanism. Equipment subtypes are annotated with references to CFIHOS and PCA RDL terms. COPI is not a reference data library; organizations should use CFIHOS, PCA RDL, or ISO 14224 for comprehensive equipment classification."@en ; skos:scopeNote "COPI fornece categorias de alto nível de equipamentos definidas por função para demonstrar o mecanismo de classe definida. Os subtipos de equipamentos são anotados com referências aos termos do CFIHOS e do PCA RDL. COPI não é uma biblioteca de dados de referência; organizações devem utilizar o CFIHOS, o PCA RDL ou a ISO 14224 para classificação abrangente de equipamentos."@pt-br ; owl:versionInfo "1.1.0-104-g4d16eff" ; owl:imports <https://spec.industrialontologies.org/ontology/core/Core/> ; owl:imports <http://purl.obolibrary.org/obo/bfo/2020/bfo.owl> ; dcterms:creator "Nicolau Oyhenard dos Santos"@en ; dcterms:contributor "Cauã Antunes" ; dcterms:contributor "Haroldo Rojas" ; dcterms:contributor "Rafael Petry" ; dcterms:contributor "Régis Romeu" ; dcterms:contributor "Mara Abel" ; dcterms:isPartOf <https://inf.ufrgs.br/projetos/OntoKG> ; dcterms:publisher "Universidade Federal do Rio Grande do Sul (UFRGS)"@en ; dcterms:license <https://creativecommons.org/licenses/by/4.0/> ; dcterms:created "2026-04-08"^^xsd:date ; dcterms:modified "2026-07-13"^^xsd:date ; apv:GlobalMinLanguageCoverage "en pt-br" ; apv:ClassURIFormationRule "https://www[.]inf[.]ufrgs[.]br/ontologies/copi/(COPI_[0-9]{7}|[A-Z][A-Za-z0-9]*)" ; apv:ClassMinAnnotationCoverage "rdfs:label https://spec.industrialontologies.org/ontology/annotation/naturalLanguageDefinition" . iof-av:naturalLanguageDefinition rdf:type owl:AnnotationProperty ; apv:MinAnnotationLength 20 . ### Identity-giving function :ElectricalPowerTransformationFunction rdf:type owl:Class ; rdfs:subClassOf iof-core:DesignedFunction ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000054 ; # realizedIn owl:allValuesFrom :ElectricalPowerTransformationProcess ] ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000054 ; # realizedIn owl:someValuesFrom :ElectricalPowerTransformationProcess ] ; rdfs:label "electrical power transformation function"@en ; rdfs:label "função de transformação de energia elétrica"@pt-br . ### Process type :ElectricalPowerTransformationProcess rdf:type owl:Class ; rdfs:subClassOf iof-core:PlannedProcess ; rdfs:label "electrical power transformation process"@en ; rdfs:label "processo de transformação de energia elétrica"@pt-br . ### Equipment universal: Transformer :Transformer rdf:type owl:Class ; owl:equivalentClass [ rdf:type owl:Class ; owl:intersectionOf ( iof-core:Assembly [ rdf:type owl:Restriction ; owl:onProperty iof-core:hasFunction ; # Object branch (MaterialArtifact/Assembly/Object/FiatObjectPart) owl:someValuesFrom :ElectricalPowerTransformationFunction ] ) ] ; rdfs:label "transformer"@en ; rdfs:label "transformador"@pt-br ; iof-av:naturalLanguageDefinition "A transformer is an electrical equipment that transforms electrical power from one circuit to another at the same frequency through electromagnetic induction using windings and a magnetic core."@en ; skos:definition "A transformer is an electrical equipment that transforms electrical power from one circuit to another at the same frequency through electromagnetic induction using windings and a magnetic core."@en ; iof-av:naturalLanguageDefinition "Um transformador é um equipamento elétrico que transforma energia elétrica de um circuito para outro na mesma frequência através de indução eletromagnética usando enrolamentos e um núcleo magnético."@pt-br ; rdfs:subClassOf [ rdf:type owl:Restriction ; owl:onProperty bfo:BFO_0000196 ; owl:someValuesFrom :COPI_0000058 ] ; # Disjointness: Transformer and ElectricMotor [] rdf:type owl:AllDisjointClasses ; owl:members ( :Transformer :ElectricMotor ) .
Axiomatization Decision LogRegistro de Decisões
1 Identity-Giving FunctionFunção Identitária
Function class
ElectricalPowerTransformationFunction ⊑ DesignedFunction
Realized in
ElectricalPowerTransformationProcess ⊑ PlannedProcess
The identity-giving function is transforming electrical power from one voltage/current level to another while maintaining frequency through electromagnetic induction. This function already exists in the enriched classes for 'power transformer', so we reuse it.
2 Genus DeterminationDeterminação do Gênero
Assemblybfo:Object (BFO_0000030)
Based on parent_candidates, the most specific appropriate superclass is ElectricalEquipment (from POSC Caesar). This is more specific than the ISO15926 'ELECTRIC TO ELECTRIC ENERGY CONVERTER' while still being a genuine superclass. Transformers are causally unified assemblies with physically connected parts (windings, core, casing) that can be disassembled for maintenance.
3 Differentia SpecificaDiferença Específica
∃bearerOf.ElectricalPowerTransformationFunction ⊓ ∃hasComponentPartAtAllTimes.TransformerWinding ⊓ ∃hasComponentPartAtAllTimes.MagneticCore

An electrical equipment that transforms power between circuits through electromagnetic induction using windings and a magnetic core.

The differentia specifies the unique electrical transformation function plus the essential physical components (windings and magnetic core) that enable electromagnetic induction, distinguishing transformers from other electrical equipment.
4 Necessary PartsPartes Necessárias

No necessary parts recorded.

These are the minimal essential components required for any transformer to function: windings for electrical connection, magnetic core for field coupling, and casing for protection.
Process Participation SignatureAssinatura de Participação em Processo
InputsEntradas
—
OutputsSaídas
—
TransformationTransformação
electromagnetic induction changes voltage/current levels while preserving frequency and power
Transformers specifically work with alternating current, transforming voltage/current levels through electromagnetic induction while maintaining frequency constant.
Disjoint WithDisjunto com
ElectricMotor
C?: ElectricMotor [kind_ambiguous]. Incompatible process signatures: transformers maintain AC-to-AC transformation, motors convert electrical to mechanical energy, generators convert mechanical to electrical energy, rectifiers convert AC to DC
MetadataMetadados
COPI IDCOPI IDCOPI_0000086
IRIIRIhttps://www.inf.ufrgs.br/ontologies/copi/COPI_0000086
StatusStatusexported
Axiom modeModoequivalent
CreatedCriado2026-04-15
UpdatedAtualizado2026-07-12
LLM modelModelo LLMclaude-sonnet-4-20250514
VersionVersão2026-07-13
Quick factsDados rápidos
GenusGêneroAssembly
Root classClasse raizAssembly
Axiom modeModoequivalent
FunctionFunçãoElectricalPowerTransformationFunction
ProcessProcessoElectricalPowerTransformationProcess
PartsPartes0
Source DefinitionsDefinições nas Fontes 3 sources
ISO 15926-4 TRANSFORMER
Definition text withheld (copyrighted standard) — follow the source link above.Texto da definição omitido (norma protegida por direitos autorais) — acesse o link da fonte acima.
CFIHOS transformer
Definition text withheld (copyrighted standard) — follow the source link above.Texto da definição omitido (norma protegida por direitos autorais) — acesse o link da fonte acima.
POSC Caesar Transformer
Definition text withheld (copyrighted standard) — follow the source link above.Texto da definição omitido (norma protegida por direitos autorais) — acesse o link da fonte acima.