Realization of negative inductance using variable active-passive reactance (VAPAR)

• Published in: IEEE transactions on power electronics Vol. 12; no. 4; pp. 589 - 596
• Main Authors: Funato, H., Kawamura, A., Kamiyama, K.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.07.1997; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Capacitance; Capacitors; Electrical engineering; Electrical engineering. Electrical power engineering; Electronics; Exact sciences and technology; Frequency; Impedance; Inductance; Power electronics, power supplies; Proportional control; Pulse width modulation inverters; Reactive power; Transient response; Voltage control; Inverter; Control system; Active component; Power electronics; Frequency response; Pulse duration modulation; Capacitor; Time response
• ISSN: 0885-8993; 1941-0107
• DOI: 10.1109/63.602553

The concept of the variable active-passive reactance (VAPAR) has been proposed previously. VAPAR consists of an inverter and a few passive elements with a control system, which behaves like a two-terminal reactive 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 and to show how to produce negative inductance by VAPAR. First, the principle and realization of VAPAR and complete two-terminal VAPAR (CTT-VAPAR) are explained. Second, the characteristics of negative inductance are analyzed from the point of view of frequency characteristics of impedance and transient response, using capacitance as a reference. Finally, through simulations and experiments, it is verified that VAPAR can generate negative inductance, and it is demonstrated that the actual inductance is cancelled.