electric motor
Let an agent explain electric motors and their types, relay principles, efficiency and standards from engineering sources, describe applications from appliances to electric vehicles, and distinguish motors from generators and engines.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain electric motors and their types, relay principles, efficiency and standards from engineering sources, describe applications from appliances to electric vehicles, and distinguish motors from generators and engines.
A machine that converts electrical energy into mechanical motion through the interaction of magnetic fields and currents, in types including brushed commutator motors, brushless DC motors, induction motors, synchronous and permanent magnet motors, stepper motors, servomotors with feedback control, coreless motors, pole-changing designs such as the Dahlander motor, and ultrasonic motors driven by piezoelectric vibration; electric motors power industry, appliances, tools and vehicles such as the Nissan EM traction motors, and consume a large share of global electricity.
What it is for: Converting electrical energy to motion.
It can be explain principles and types; relay efficiency and standards; describe applications; distinguish from generators.
Distinguishing features
Electromagnetic torque
Many topologies
Variable speed control
High efficiency
What it looks like
A cylindrical housing with a rotating shaft, from tiny to room-sized.
Physical character
share of global electricity use: about 45 percent - IEA estimates
efficiency of large industrial motors: over 95 percent
first practical DC motor: 1830s period - Jacobi and Davenport
How it is recognised
Electromechanical machine producing rotation or linear motion
Brushed, brushless, induction, synchronous, stepper, servo, coreless, ultrasonic motors
Generators convert motion to electricity; combustion engines burn fuel; actuators may use motors
Related models
is a kind of - in registry terms
is a kind of - in registry terms
is the counterpart of - which reverses the conversion
is controlled by - in many applications
In practice
Families and kinds
brushed DC and commutator motors
brushless DC and permanent magnet synchronous motors
induction motors including pole-changing Dahlander motors
stepper and servomotors
coreless and micro motors
ultrasonic and piezoelectric motors
linear motors
traction motors for vehicles such as Nissan EM series
Identifiers
IEC 60034 rotating electrical machines
HS 8501 electric motors and generators
Standards and regulation
IEC 60034 and efficiency classes IE1 to IE5
Minimum energy performance standards in the EU, US and elsewhere
Electrical safety standards
Vehicle motor standards
Failure modes and hazards
Bearing and insulation failure
Overheating
Electrical shock hazards
Confusing motor types in selection
Also called
+7
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.electric-motor
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand What an electric motor is.
Science.
Principle
Principle.
Principle
Principle.
- How does an electric motor produce torque from magnetic fields and currents? definition
- Is the question about a motor, a generator or a combustion engine? boundary
Types
Types.
Types
Types.
- What are the main motor types, from brushed and induction to stepper, servo, coreless and ultrasonic motors? definition
- Which entry fits the specific type? action
Select Selection and control.
Practice.
Selection
Selection.
Selection
Selection.
- How are motors selected by torque, speed, duty and environment? action
- Which references are standard? provenance
Control
Control.
Control
Control.
- How are motors controlled with drives, inverters and feedback, including pole-changing designs? provenance
- Which entry fits motor controller? action
Efficiency Efficiency and regulation.
Regulation.
Classes
Efficiency classes.
Classes
Classes.
- What are the IE efficiency classes, and what regulations require them? provenance
- Which sources are cited? provenance
Impact
Energy impact.
Impact
Impact.
- How much electricity do motors use, and how can efficiency be improved? provenance
- Which entry fits energy efficiency? action
Context Applications and history.
Context.
Applications
Applications.
Applications
Applications.
- How are motors used in industry, appliances, robotics and electric vehicles? provenance
- Which entry fits electric vehicle? action
History
History.
History
History.
- How did motors develop from Faraday and Jacobi to Tesla induction motors and modern drives? provenance
- Which entry fits the history of the electric motor? action
What the second pass must settle
- Should induction motor and brushless DC motor be separate primary entries?
- How should engineering standards be linked?
- The registry entry has merged aliases naming specific products; should they be split off?