Designed the control system based on ATmega 16 according to the requirement of inductively coupled plasma spectrum instrument.

A coupled inductor was used to substitute inductor, so that the circulating current in the zero state could be zero.

Based on the analysis of the shortage of the single-phase Boost converter in the high gain applications,a method of adding an equivalent DC voltage source was proposed,and a type of Boost converter using coupled inductor was described.

The auxiliary circuit is composed of an auxiliary switch,a coupled inductor(flyback transformer) and a feedback diode.

A tapped inductor ia attached at the secondary side of transformer instead of common filter inductor,the voltage induced by tapped inductor reflects to the primary side,which makes the circulating current of converter during the zero state decreas-es to zero.

A tapped inductor was adopted to substitute for the normal inductor,so that the circulating current in the zero state could be reset to zero.

To overcome the high voltage stress of the secondary side of the transformer, a novel zero-voltage and zero-current-switching (ZVZCS) three level converter is proposed: The free-wheeling primary current is reset to zero through introducing a tapped inductor attached at the secondary side.

A brief talk about inductive coupling plasma atomic emission spectrograph(ICP-AES)

Using self-made device, the functions of preventing electromagnetic interference of coaxial cable are studied, such as the capacitance coupling frequency characteristics, the shielding effects of the capacitive coupling and the inductive coupling.