exported
equivalent
electric motor
IRI:
http://www.inf.ufrgs.br/ontologies/copi#Electricmotor
Generated on 2026-04-13
Natural Language Definition
EN
An electric motor is an assembly that bears an electric-to-mechanical energy conversion function and has both a stator and rotor as essential components.
PT-BR
Um motor elétrico é um conjunto que possui uma função de conversão de energia elétrica para mecânica e tem tanto um estator quanto um rotor como componentes essenciais.
Formal Axioms
Semi-formal (Aristotelian)
Every electric motor is an assembly that bears an electric-to-mechanical conversion function and has component parts including a stator and rotor at all times.
First-Order Logic Theory
Loading…
▸ Stored override
ElectricMotor(x) ↔ Assembly(x) ∧ ∃f(ElectricToMechanicalConversionFunction(f) ∧ bearerOf(x,f)) ∧ ∃s(Stator(s) ∧ hasComponentPartAtAllTimes(x,s)) ∧ ∃r(Rotor(r) ∧ hasComponentPartAtAllTimes(x,r))
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: ElectricMotor
<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" ;
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 "2026-10-08"^^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
:COPI_0000193 rdf:type owl:Class ; # ElectricToMechanicalConversionFunction
rdfs:subClassOf iof-core:DesignedFunction ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:allValuesFrom :COPI_0000488 # ElectricToMechanicalConversionProcess
] ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty bfo:BFO_0000054 ; # realizedIn
owl:someValuesFrom :COPI_0000488 # ElectricToMechanicalConversionProcess
] ;
rdfs:label "electric to mechanical conversion function"@en ;
rdfs:label "função de conversão elétrico-mecânica"@pt-br .
### Process type
:COPI_0000488 rdf:type owl:Class ; # ElectricToMechanicalConversionProcess
rdfs:subClassOf iof-core:PlannedProcess ;
rdfs:label "electric to mechanical conversion process"@en ;
rdfs:label "processo de conversão elétrico-mecânica"@pt-br .
### Equipment universal: ElectricMotor
:COPI_0000113 rdf:type owl:Class ; # ElectricMotor
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 :COPI_0000193 # ElectricToMechanicalConversionFunction
]
)
] ;
rdfs:label "electric motor"@en ;
rdfs:label "motor elétrico"@pt-br ;
iof-av:naturalLanguageDefinition "An electric motor is an assembly that bears an electric-to-mechanical energy conversion function and has both a stator and rotor as essential components."@en ;
skos:definition "An electric motor is an assembly that bears an electric-to-mechanical energy conversion function and has both a stator and rotor as essential components."@en ;
iof-av:naturalLanguageDefinition "Um motor elétrico é um conjunto que possui uma função de conversão de energia elétrica para mecânica e tem tanto um estator quanto um rotor como componentes essenciais."@pt-br ;
iof-av:semiFormalNaturalLanguageAxiom "Every electric motor is an assembly that bears an electric-to-mechanical conversion function and has component parts including a stator and rotor at all times."@en ;
iof-av:firstOrderLogicAxiom "ElectricMotor(x) ↔ Assembly(x) ∧ ∃f(ElectricToMechanicalConversionFunction(f) ∧ bearerOf(x,f)) ∧ ∃s(Stator(s) ∧ hasComponentPartAtAllTimes(x,s)) ∧ ∃r(Rotor(r) ∧ hasComponentPartAtAllTimes(x,r))"@en ;
skos:definition "[ISO 15926-4] An <ELECTRIC MOTOR> is an <ELECTRIC ROTATING MACHINE> and a <MOTOR> and an <ELECTRIC TO MECHANICAL ENERGY CONVERTER>"@en ;
skos:definition "[CFIHOS] An electric machine for transforming electric energy into mechanical energy."@en ;
skos:definition "[POSC Caesar] An electric machine for transforming electric energy into mechanical energy"@en .
# Disjointness: ElectricMotor and Transformer
[] rdf:type owl:AllDisjointClasses ;
owl:members ( :COPI_0000113 :COPI_0000086 ) . # ElectricMotor, Transformer
Axiomatization Decision Log
1
Identity-Giving Function
Function class
ElectricToMechanicalConversionFunction
⊑ DesignedFunction
Realized in
ElectricToMechanicalConversionProcess
⊑ PlannedProcess
The identity-giving function is converting electrical energy into mechanical energy. This is consistently mentioned across all three source definitions (ISO 15926, CFIHOS, POSC Caesar) as the core purpose that distinguishes electric motors from other equipment types.
2
Genus Determination
Assembly
bfo:Object (BFO_0000030)
Causally unified material artefact composed of physically connected,
separable MaterialComponent parts. Satisfies
Assembly ⊑ MaterialArtifact ⊑ bfo:Object.
No specific 'Motor' or 'RotatingMachine' class is enriched in our ontology yet. Electric motors are complex assemblies with multiple physically connected parts (stator, rotor, bearings, housing, terminals) that are causally unified and maintained as a single unit. The parent candidates from source hierarchies (ELECTRIC ROTATING MACHINE, MOTOR) are not yet enriched, so we use Assembly as the most appropriate existing genus.
3
Necessary Parts
No necessary parts recorded (concept may be primitive at this level).
These parts are architecturally necessary for any electric motor to function. Stator and rotor provide the electromagnetic conversion, housing provides structural integrity, and bearings enable rotation.
4
Process Participation Signature ⟨I, O, T⟩
Inputs (I)
—
Outputs (O)
—
Transformation (T)
electrical energy converted to rotational mechanical energy
Electric motors consume electrical energy and produce rotational mechanical energy. This signature distinguishes them from generators (opposite direction), pumps (fluid transformation), or compressors (gas compression).
5
Axiom Mode Decision
Necessary + Sufficient
— modelled as a defined class
(≡, EquivalentClass). Automatic classification is
appropriate for this concept.
Disjointness Axioms
Transformer
C?: Transformer [kind_ambiguous]. Electric motors convert electrical to mechanical energy, which is incompatible with generators (mechanical to electrical), transformers (electrical to electrical at different voltages), or other electrical converters that don't produce mechanical output.
Cross-Standard Observations
All three sources consistently define electric motor as converting electrical energy to mechanical energy. ISO 15926 provides the most detailed hierarchical context (electric rotating machine, motor, energy converter), while CFIHOS and POSC Caesar use identical simpler definitions. The properties from CFIHOS/DEXPI and ISO 14224 focus on operational characteristics (power, voltage, speed) rather than definitional requirements.
Source Definitions
3 sources
ISO 15926-4
ELECTRIC MOTOR ↗
Definition text withheld (copyrighted standard) — follow the source link above.
CFIHOS
electric motor
Definition text withheld (copyrighted standard) — follow the source link above.
POSC Caesar
Electric Motor ↗
Definition text withheld (copyrighted standard) — follow the source link above.
Metadata
| Ontology | COPI |
| Research group | INF-UFRGS-Ontologies |
| Funding | CNPq INF-UFRGS-ENERGIA |
| Project | OntoKG / Petrobras |
| ID | #84 |
| Cluster | electric motor |
| Status | exported |
| Axiom mode | equivalent |
| Created | 2026-04-13 |
| Updated | 2026-09-08 |
ISA 5.1-2022 P&ID Symbol
5_4_1/020_electric_motor.png
