Analysis of Power Loss and Improved Simulation Method of a High Frequency Dual-Buck Full-Bridge Inverter

Abstract

Abstract:A high frequency dual-buck full-bridge inverter for small power renewable energy application is proposed in this paper. A switching frequency of 400 kHz is achieved with the adoption of the SiC power device. A two-pole two-zero (2P2Z) compensator is employed in the outer voltage loop to generate the current reference for inner current loop. A 3P3Z compensator is adopted in the inner current loop to track the current reference. A systematic way for calculating the losses of high frequency inverter is presented, and the losses of the components are thoroughly analyzed. The turn-on and turn-off procedures of the inverter are discussed in detail. The losses caused by high frequency are calculated accurately, and the loss distribution is established as well. The procedure of the loss analysis gives a practical example for calculating the loss of similar type inverters. Moreover, deviation between pulse width modulation (PWM) control signal and switching response in high frequency switching is thoroughly analyzed. The influence of deviation is verified by designed experiment. Hence, a compensation method is proposed in order to minimize the influence. The compensation effect is validated by experiment and simulation. Finally, a 1-kW prototype is built to verify the feasibility of the theoretical analyses. The grid-connected maximum output power experiment is completed at 1 kW with the efficiency of 96.1% and the total harmonic distortion (THD) of 1.8%. The comparison experiments of power loss between Si and SiC power devices are carried out. The experiment results confirm the loss calculation method to be valid.

Performance Evaluation of a PID-Controlled Synchronous Buck Converter Based Battery Charging Controller for Solar-Powered Lighting System in a Fishing Trawler

“…The total losses of the SBC were dependent on many factors such as the type of semiconductor devices, operating values (voltage, current, and frequency) of the converter, core influences, and PCB manufacturing technology, etc. [30][31][32][33]. However, the efficiency of a DC-DC converter significantly depends on the semiconductor losses (P loss_semi ) and the inductor losses (P loss_inductor ) [34].…”

Loss Characteristics of 6.5 kV RC-IGBT Applied to a Traction Converter

“…According to the simulation data of the rectifier working status, the average value of the current in a switching period is calculated, and the losses of the switches are tested under the different average values of the current in the rated condition. Due to the same effect of switching devices, the loss of a PWM rectifier with a modulated wave period is also the total of the average loss of four switches [30]. Table 2 lists the conduction loss, switching loss, and total loss of the conventional IGBT converter and RC-IGBT converter under saturation control and RCDC control in one working cycle.…”

Comparative Analysis and Optimization of Power Loss Based on the Isolated Series/Multi Resonant Three-Port Bidirectional DC-DC Converter

“…In [25,26], the switch and diode loss are studied and compared in detail for several converter topologies, and the specific loss distribution of the corresponding topology is also given. In [27], the losses of diodes with various materials is compared, and the loss distribution based on the corresponding topology is also given. Although comprehensive investigations have been conducted in these references, their proposed methods are only applicable to low-frequency alternatives.…”

“…For power converters, especially for the high frequency applications, the loss analysis is crucial due to its guiding significance for the efficiency estimation and magnetic design [24][25][26][27][28][29][30]. Therefore, an increasing number of scholars have focused their attention on the loss analysis for various converters.…”