REALIZATION OF NEGATIVE INDUCTANCE USING VARIABLE ACTIVE-PASSIVE REACTANCE (VAPAR)

The concept of the variable active-passive reactance (VAPAR) has been proposed in [4] and [5], VAPAR consists of an inverter and a few passi ve elements with a control system, which behaves like a two-terminal r eactive element, and the produced active reactance works as a passive reactive component, including in transient state. The main purpose of this paper is to analyze the characteristics of negative inductance an d to show how to produce negative inductance by VAPAR. First, in this paper the principle and realization of VAPAR and complete two-terminal VAPAR (CTT-VAPAR) are explained, Second, the characteristics of negat ive inductance are analyzed from the point of view of frequency charac teristics of impedance and transient response, using capacitance as a reference, Finally, through simulations and experiments, it is verifie d that VAPAR can generate negative inductance, and it is demonstrated that the actual inductance is cancelled.