Autotransformer
Definition
A special type of electrical transformer possessing a single winding on a common magnetic core, structurally serving as both primary and secondary windings through intermediate taps. This electrotechnical device is used for step-by-step or fixed variation of alternating voltage, offering high efficiency, small dimensions, and material savings compared to classic transformers with two galvanically isolated windings.
Bilingual Equivalents
- Autotransformer
- Variac
Grammatical & Source Details
| Inflection Type | Neuter noun, regular engineering plural and structural case variations. |
| Formation | Compound noun formed with the prefixoid 'auto-' (self) attached to the base noun 'transformator' (transformer). |
| Spelling / Pronunciation | [a.u.to.trans.for.ma.ˈtor] |
| Source | Encyclopedia of Electrical Engineering, Grid Infrastructure and Power Systems |
Contextual Usage Examples
RO: Inginerul a reglat tensiunea de ieșire utilizând un autotransformator de laborator cu cursor glisant.
EN: The engineer adjusted the output voltage utilizing a laboratory autotransformer with a sliding contact.
RO: Deși un autotransformator economisește cupru, el prezintă riscul lipsei izolării galvanice între rețele.
EN: Although an autotransformer saves copper, it poses the risk of lacking galvanic isolation between networks.
RO: Sistemul feroviar utilizează un autotransformator masiv pentru a stabiliza alimentarea liniilor de înaltă tensiune.
EN: The railway system utilizes a massive autotransformer to stabilize the high-voltage line power supply.
Idioms & Phrases
Autotransformator de reglaj / Variable autotransformer
RO: Aparat electric prevăzut cu un contact mobil ce permite modificarea continuă a tensiunii livrate către un circuit.
EN: An electrical device provided with a movable contact allowing the continuous modification of the voltage delivered to a circuit.
Înfășurare de autotransformator / Autotransformer winding
RO: Bobină metalică unică unificată structural, realizată din sârmă de cupru, ce deține mai multe prize de conexiune.
EN: A single structurally unified metallic coil made of copper wire, holding multiple connection taps.
Autotransformator de pornire / Starting autotransformer
RO: Dispozitiv utilizat în industrie pentru a reduce curentul de pornire absorbit de motoarele asincrone mari.
EN: A device utilized in industry to reduce the starting current absorbed by large asynchronous motors.
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