Title :
Inductorless switched-capacitor inverter with high power density
Author :
Mak, O.C. ; Ioinovici, Adrian
Author_Institution :
Dept. of Electr. Eng., Hong Kong Polytech. Univ., Hung Hom, Hong Kong
Abstract :
A DC-AC inverter containing no magnetic devices is proposed. The energy is transferred from an unregulated line to a regulated sinusoidal output through a controlled switched-capacitor (SC) circuit. The SC circuit is formed by two symmetrical sub-circuits, which operate in anti-phase in each half-cycle of a switching period: when one of them is in the charging state, the other one is in the discharging state. A typical period of the output sinusoid is realized in 64 steps. Any switching cycle in a step is formed by four phases, the even phases playing a regulation role. A duty-cycle control is used. The inverter exhibits small size, low weight, good efficiency, clean AC output, good regulation capability with respect to large changes in line or load
Keywords :
DC-AC power convertors; PWM invertors; switched capacitor networks; switching circuits; DC-AC inverter; anti-phase operation; charging state; clean AC output; controlled switched-capacitor circuit; discharging state; duty-cycle control; energy transfer; high power density; inductorless switched-capacitor inverter; regulated sinusoidal output; regulation capability; switching period half-cycle; symmetrical sub-circuits; unregulated line; Capacitors; Control engineering education; Educational technology; Electrical equipment industry; Electricity supply industry; Inverters; Magnetic devices; Switches; Switching circuits; Switching converters;
Conference_Titel :
Power Electronics Specialists Conference, 1995. PESC '95 Record., 26th Annual IEEE
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-2730-6
DOI :
10.1109/PESC.1995.474977
