With the social development and progress, the mechanical equipment are largely used in our life. The incessant emergence of new technology makes the machine integration, complication and intelligentize and the overhaul and maintenance are more and more important.Fault diagnosis and inspection are rapidly developmental as a new subject. The portable data acquisition instrument by right of its m...

The development of the solar cells draw much attention on increasingly improving the efficiency and reducing the product cost. Based on the solar cell work principle , tandem solar cells that consist of a homojunction and a heterojunction are important solutions to this problem, which can achieve higher efficiency by relatively lower cost with different energy band materials and be designed we...

Fuel cell is a device that can convert chemical energy directly to electricity. It uses hydrogefl or natural gas as fuels to generate electricity. Because it is not limited by carnot cycle, it generates electricity in a high efficient and environmental friendly way. Solid Oxide Fuel Cell …

With the fast development of information technology, digital CVCF-PWM power supply become possible. The performance of the on-line UPS is the best among all kinds of UPS, and it is widely used in many fields. But because the on-line UPS needs the DC voltage from the rectifier, in order to reduce the harmonic pollution caused by the non-control rectifier, this dissertation focuses on the study ...

Ni/MH battery as a rechargeable and high capacity battery has been wide application. As Ni/MH battery’s positive electrode, the nickel electrode is one of Ni/MH battery’s key parts. The improvement on the performance of the nickel electrode becomes a kind of valid approach of the enhancement of Ni/MH battery’s whole performance.In this thesis, the Ni(OH)2 is prepared by micro-emulsion me...

The technology of high frequency of switching power supply “20 KHz power supply technique revolution” that brings, not only in the direct current steady power supply field to play the predominant position, at the field of many industry power supply such as the electric arc machine, the high frequency inductive to heat, the aviation power supply, and the laser power supply etc., but...

Power supply for induction heating is an equipment to heat the workpiece by whirling current and it is applied widely in industry because of its many virtues. Now,intermediate frequency power supply is perfect.but high frequency power supply has defects in the aspects of frequency and capacity and so on.So high frequency power supply is developed in this thesis.Firstly.operation principle of i...

High voltage DC power supplies are widely used in many fields. High voltage DC switching power supply with high frequency and high power are required by the development of many new technologies, such as numeric imaging of X-ray for medical use, compact pulsed power source etc. The technology of high voltage DC switching power supply has been successfully developed in advanced countries, but is...

This article refers to a design method of compatible automatic manufacture system, which is a method of orientation object and virtual sculpture based on axiomatic design theory. The research of technical automatic assembly line system for Li/MnO2 batteries relied on this method has gotten satisfactory effects and attained expected objective.Facing Li/MnO2 batteries \’s characteristic th...

Solar cells are devices that translate light energy to electronic energy by using the photoelectric effect or photochemistry effect. According to different material used, solar cell can be divided into silicon solar battery, multi-compound pellicle solar battery, polymer multilayer decorated pole solar battery and nanometer crystal solar battery. And silicon solar battery is the best develope...