4500kW brushless exciter is the device which supplies the direct current for 1000MW level turbine genera- tor,among the manufacturing technology of 4 500kW brushless exciter,the diode rectifying is very important part,assuring the good contact between the rectifying components and rectifier wheel is also very important .

Summary on energy efficiency technology of rectifying sets;

This paper describes technical requirements of electrolytic load to supply electricity and type of large rectifier set.

The paper analyzes in detail the generating process of 24-pulse rectifier set for power supply system of urban mass transit, raises the voltage ratio between idle DC output voltage of rectifier set and idle line voltage at valve side of rectifying transformer, and the calculation on the basis of idle DC output voltage waveform of the rectifier set.

The technical reformation of 3340 kVA rectifier set of graphization furnace is introduced,by which good economic profit got.

In order to maintain the quality of URT power supply,this paper makes an analysis of the rectifier unit,its connection with other equipments,especially the connection with AC bus and DC bus,as well as their economic and technical issues,etc.

This paper introduces in detail the debugging requirements and d eb ugging procedures of the rectifier unit and rectiformer equipped in Qinghai Brid ge- head Electrolytic Aluminium Engineering, and sums up the notable matters in and debugging results of the debugging course.

Quantitative analysis of the influence of perssure grade of rectiformer on the operation of rectifier unit,together with the ideal method of operation of switch,is persented in this paper.