For servo driven welding gun can control electrode pressure and position precisely, MFDC can control welding current rapidly,they can improve weld quality greatly.

Discussion on advantages of MF inverter DC resistance welding;

According to MF(Medium Frequency) inverter technology and MF inverter electrical source theory, this paper explained and designed out an new method to realize MF inverter.

In this paper, a scroll compressor with DC-inverter, a condenser with whole plain-fins, an evaporator with double-face slotted fins and a capillary tube as a throttle device are used.

The experimental study on a DC-inverter air- conditioning system using refrigerant 410A has been car- ried out.

The experimental study on a KFR-35GWQ/BM DC-inverter air-conditioning system using refrigerant 410A has been carried out.

On the basis of analyzing the experiment results,the work process of DC inverter air-conditioners could be further mastered,and some feasible theoretical instructions were provided for researchers and designers of inverter air-conditioners.

Experimental research of 120° trapeziform wave drive DC inverter air-conditioner was executed.

This paper address r410a dc inverter with the advantages and the key technic points,such as r410a compressor selection,system design keynotes,the design key points on dc inverter and so on,to the development of air conditioner.

A medium frequency inverter using step waveform modulation;