autotransformer

Noun

(electrical engineering) A transformer with a single winding, its output being taken from taps.

Japanese Meaning

（電気工学）単一の巻線を持ち、その一部（タップ）から出力が得られる変圧器、つまり「単巻変圧器」や「自動変圧器」と呼ばれる装置

What is this buttons?

The autotransformer reduced the starting current by providing a fractional voltage to the motor.

Google Translation / DeepL Translation

そのオートトランス（単巻線変圧器）は、モーターに部分的な電圧を供給して始動電流を低減した。

Details

Sense（1）

(electrical engineering) A transformer with a single winding, its output being taken from taps.

One of the principal features of the ordinary configurations of the transformer … is the electrical isolation that exists between the primary and secondary windings. … Whenever large transformation ratios are involved, safety demands that ordinary transformers be used. However, in instances where the transformation ratio is close to unity (which minimizes the hazard), a transformer employing a single tapped winding may be used with notable advantages.