#excitation

• Self-excitation — The act of self-exciting and its result; the process of magnetizing an electric generator using the current generated by itself, or the autonomous generation of a nerve impulse or biological alert state without external stimulants.
• Self-excited — Regarding machines, generators, or electrical systems: self-excited; producing its own excitation current required to create its magnetic field without an external power source. Broadly or figuratively, it describes a system, circuit, or state that stimulates, maintains, or amplifies itself through its own internal mechanisms or residual reactions.
• Self-excitation — The phenomenon or process of producing the excitation current required for an electrical generator by the machine itself, utilizing the residual magnetism in the inductor poles. In an abstract or systemic sense, self-excitation represents the property of a dynamic system to generate or intensify physical phenomena, oscillations, or tension states through internal positive feedback.