Jin Xiaoyi

Resonant tank and transformer design in series resonant converter

The objective of this paper is to establish the industrial design procedure of the resonant tank components and HF transformer in series-resonant converter or inverter. Based on the analysis of the main operation principles of the resonant tank and HF transformer, an industrial design process of these components is given by considering the design requirements which is acquired via the simulation; utilizing the aforementioned components, a 1 KW series-resonant inverter prototype has been constructed, and the validity of the design procedure has been proved via the experimental results.

DSP-based closed-loop control of bi-directional voltage mode high frequency link inverter with active clamp

This paper presents a novel modulation and digital controller based on a bi-directional voltage mode high frequency link inverter with active clamp to achieve fast dynamic response and high static performance. The inverter consists of a full-bridge converter, a bi-directional active rectifier, an active clamp branch and a pulse width modulation (SPWM) inverter bridge. A novel modulation strategy is applied by modulating the triangle carrier wave and two inverse sinusoidal modulation waves, it is no need of checking the pole of the output voltage to switch the modulated signals, and it is able to weaken the distortion of the output waveform on zero passage. Double closed-loop digital control with load current feed-forward is applied to achieve good dynamic response. The modulation and control strategy is realized by using the TMS320LF2407A DSP and EPM7128 CPLD. Theoretical analysis and experimental results referring to a laboratory prototype (3 KVA) indicate that the proposed modulation and control scheme are promising for the applications of DC/AC power supply.

A Novel Series Resonant High-Frequency Link Sine-wave Inverter Family

A novel topology family to realize sine-wave inversion is presented in this paper, and the main idea is using series resonant technology to afford zero-current switching (ZCS) state of the overall power switches. The proposed system consists of a full bridge LC series high frequency (HF) inverter which transforms the DC input into a HF sine-wave current source, an isolated HF transformer, a cycloconverter and a capacitor filter. Based on the one topology of family, the working principles are analyzed and the basic control thought is given. Finally, the experimental result proves the validity of the theoretical analysis

A Low THD Current Mode DC/AC Converter Apply Power Flow Waveform Library Analysis

A novel bi-directional series resonant inverter is present in this paper, which all switch can work in a ZCS condition with fixed frequency. A bilateral switch is connected to primary side of transformer which will control the energy following more perfectly. With the bi-directional switch k degree of current control was improved. Power flow with different switch combination was analyzed and its waveform library was used to control the energy following. The topology has a bright prospect in low THD inverter and special inverter. Experimental result proves the validity of the theoretical analysis

Series Resonant High Frequency Link Sine-wave Inverter System Modeling using Sampled Data

Based on the detailed analysis of the series resonant high frequency link sine-wave inverter operational principle, a system modeling methodology is presented using the sampled data. For this special modeling application, a black-box approach is described based on the data which are gotten from simulation or experimental results. And this approach aims at generating discrete-time small-signal linear equivalent model which describes the inverter as a linear time-invariant system, so the knowledge of the linear system can be used to the identified model for constructed feedback controller. The identified model is verified by the simulation and experimental results