Design and Analysis of Power-CMOS-Gate-Based Switched-Capacitor Boost DC–AC Inverter

Abstract

A multistage power CMOS-transmission-gate-based (CMOS-TG) quasi-switched-capacitor (QSC) boost dc-ac inverter is proposed and integrated with a boost dc-dc converter for a step-up application with ac or dc load. In this paper, using CMOS-TG as a bidirectional switch, the various topologies can be integrated in the same configuration for achieving two functions: boosting and alternating; boosting for getting a sinusoidal output in which the peak is the result of a many times step-up of the input; alternating to realize the positive/negative half sinusoidal of the output. The inverter does not require any inductive elements as inductor and transformer, so integrated circuit (IC) fabrication will be promising for realization. By using the state-space averaging technique, the large-signal state-space model of the inverter is proposed, and then both the static analysis and dynamic small-signal analysis are derived to form a unified formulation for inverter/converter. Based on this formulation, there are presented for theoretical analysis/control design, including steady-state power, conversion efficiency, voltage conversion ratio, output ripple percentage, capacitance selection, closed-loop control and stability, and total harmonic distortion (THD), etc. Finally, a six-stage QSC boost dc-ac inverter is simulated by PSPICE, and the simulations are discussed for some cases, including: 1) steady-state ac output, ripple percentage, and power efficiency; 2) transient response of the regulated inverter for load variation; 3) a practical capacitive load: electromagnetic luminescent (EL) lamp, and 4) efficiency, ripple percentage, and THD for different loads. The results are illustrated to show the efficacy of the proposed inverter.Index Terms-CMOS-transmission-gate-based (CMOS-TG), quasi-switched-capacitor (QSC), boost DC-AC inverter, state-space averaging technique, total harmonic distortion (THD).

A Comparison Between Perturb and Observe and Modified Perturb and Observe MPPT Techniques

“…For avoiding the EMI effect, it is a quite excellent choice to adopt a switched capacitor circuit scheme, containing only capacitors and switches. Although the circuit leads to efficiency problem, it is the most excellent one of their advantages that the SC circuits do not require any magnetic elements (inductor/transformer), so the IC fabrication is not only promising but the EMI problem is also improved [3].…”

On Energy Efficiency of Switched-Capacitor Converters

“…14(b)], will be discussed. The instantaneous voltages, current, and energy profile in both the full and partial discharging processes over a discharging cycle are respectively given in (20) and (21) The balanced voltage V C f can be found using the charge balance approach as…”

“…For example, in [20], it is claimed that higher efficiency could be obtained by reducing the turn-on resistance R DS(on) of the power MOSFETs. In [21], it is emphasized that the insertion of a series current-sensing resistor could result in large power loss.…”

Performance Analysis of Double Boost Converter Powered FSTPI Fed Induction Motor

“…A zero voltage transition isolated PWM boost converter for single stage power factor correction has been proposed [5], which suffers from the problem of existence of low ripple frequency. A canonical switching cell converter has been designed and analyzed with CMOS gate [6] [7]. The designed topology produces heat problem due to power loss and hence system performance is affected by poor efficiency.…”