noun
excitation current
Technical term in electrical engineering: the current that flows through the field winding of a motor, generator, or transformer to produce a magnetic field.
励磁電流を調整してモーターのトルクを制御する。
Adjust the excitation current to control the motor's torque.
Synonymous with 励磁電流; both refer to the current that produces the magnetic field in electrical machines. 界磁電流 is also a technical term, often used interchangeably.
Compound of 励磁 (excitation, magnetization) and 電流 (electric current). The exact historical derivation is uncertain; the spelling is conventionally associated with the technical meaning.