electric motor
B2Neutral to Technical
Definition
Meaning
A device that converts electrical energy into mechanical energy (rotation or linear motion).
A machine used in countless applications, from household appliances and vehicles to industrial machinery, characterized by its use of electric current and magnetic fields to produce motion.
Linguistics
Semantic Notes
A compound noun where 'electric' specifies the type of power source. It distinguishes the device from internal combustion, steam, or hydraulic motors. The term is often used generically but encompasses many subtypes (e.g., AC, DC, induction, servo).
Dialectal Variation
British vs American Usage
Differences
No significant difference in the core term. 'Motor' alone can imply 'electric motor' in technical/engineering contexts. In everyday UK English, 'motor' can colloquially refer to a car.
Connotations
Identical technical connotations. In non-technical UK speech, hearing 'motor' might first evoke 'car', whereas in US technical contexts, 'motor' more immediately implies 'electric motor'.
Frequency
Slightly higher frequency in US English in general engineering and DIY contexts, reflecting cultural differences in manual and technical discourse.
Vocabulary
Collocations
Grammar
Valency Patterns
The [ADJ] electric motor [VERB] the [NOUN].An electric motor [VERB] [PREP] the [NOUN].Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “The electric motor is the heart of the machine.”
- “It's not rocket science, it's just an electric motor.”
Usage
Context Usage
Business
We need to source more efficient electric motors for our new product line to reduce energy costs.
Academic
The paper analyses the torque-speed characteristics of a three-phase induction electric motor under variable load conditions.
Everyday
I think the electric motor in the fan has burnt out; it's making a funny noise.
Technical
Ensure the PWM signal to the BLDC electric motor does not exceed the rated duty cycle to prevent demagnetisation.
Examples
By Part of Speech
verb
British English
- We need to motor the conveyor with a more efficient unit.
American English
- The design calls for motoring the pump directly.
adjective
British English
- The motor torque was insufficient.
American English
- Check the motor housing for cracks.
Examples
By CEFR Level
- This toy car has a small electric motor inside.
- The electric motor makes the fan spin.
- We replaced the old petrol engine with a new electric motor.
- If the electric motor stops, the whole machine won't work.
- The efficiency of the electric motor directly impacts the vehicle's range.
- Engineers are developing quieter electric motors for household appliances.
- Sophisticated control algorithms regulate the torque output of the brushless electric motor.
- The hysteresis losses within the stator core significantly affect the motor's overall thermal performance.
Learning
Memory Aids
Mnemonic
Think: ELECTRICity makes it MOVE (Motor).
Conceptual Metaphor
THE HEART OF THE MACHINE (it provides the essential driving force).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid translating 'motor' as 'мотор' in non-technical contexts where 'двигатель' is more precise. 'Electric motor' is 'электрический двигатель' (электродвигатель), not 'электрический мотор'.
- Do not confuse with 'generator' ('генератор'), which performs the opposite function.
Common Mistakes
- Using 'engine' interchangeably (an engine typically converts heat, not electricity).
- Misspelling as 'electic motor'.
- Incorrect article: 'a electric motor' instead of 'an electric motor'.
Practice
Quiz
What is the primary function of an electric motor?
FAQ
Frequently Asked Questions
An electric motor converts electrical energy into mechanical energy. An 'engine' (like a car engine) typically converts thermal energy (from burning fuel) into mechanical energy.
No, there are many types (AC, DC, induction, synchronous, brushless, servo) with different characteristics, used for different applications based on required power, speed, control, and cost.
Many types can, in principle. If you mechanically drive the shaft of an electric motor, it can generate electricity, a principle used in regenerative braking in electric vehicles.
They convert a higher percentage of input energy into useful work (less waste heat and friction) and have fewer moving parts, leading to higher energy efficiency, often above 90% compared to 20-40% for combustion engines.