noun
frequency converter
Technical term used in electrical engineering and power systems to refer to a device that changes the frequency of an alternating current.
この周波数変換装置は、50Hzの電源を60Hzに変換できます。
This frequency converter can convert a 50 Hz power supply to 60 Hz.
Compound of 周波数 (frequency) + 変換 (conversion) + 装置 (device).