In order to better meet the market demand for variable-speed constant-frequency generators, reduce the cost of new energy generation, and improve the level of safe operation of the power grid, Qingdao Meihua Permanent Magnet Electric Technology Co., Ltd. and Wang Guangshun, the distinguish

Nowadays, the maintenance-free battery is widely used. It has the advantages of no need to add distilled water, no corrosion of the terminal, less self-discharge and long life, but it also needs nursing. Pay attention to the following points when nursing: (1) Always keep the outside of the battery

0 Introduction Microcomputer protection has been widely used in power systems. In this paper, based on the experience of field operations in recent years, some problems in the application of 220 kV main transformer protection are discussed and corresponding suggestions are made. 1 Configuration sch

1. The injection pump driven by the fuel injection pump on the camshaft of the diesel engine is directly driven by the tappet under the unit pump, and is made into an integral structure with the diesel engine. The transmission is simple, the structure is com

Measures to improve the "temperament" by using oil instead of oil Member of the Provincial People's Political Consultative Conference and Deputy Chairman of the Provincial Party Committee of the Ministry of Agriculture, Labour and Industry, W

Mr. Chen’s home decoration in Nanjing entered the second half of the year and bought the lights on the agenda. The designer’s suggestion is to use LED lights more, energy saving, long life and no ghosting. Some individual style lamps only use LED lights. These obvious advantages make

Faults in common mechanical parts and failures in the maintenance feed section: The working process is normal, but the dimensional change in the X (Z) axis direction is too large. Fault analysis: 1 possible x (Z) axis servo drive failure. The screw is too large; the screw is damaged. Solution: T

From the "Beijing Fair", it was learned that Beijing's first auto parts bonded warehouse will be officially spent in Chaoyang, becoming a national bonded warehouse area after the Cultural Bonded Center. The auto parts bonded warehouse is located in the cool car town near the East Four

New developments in spring materials Si-Cr steels have been widely used in ferrous metal valve springs and suspension springs. To improve fatigue strength and relaxation resistance. Adding V, Mo in the Si-Cr steel. The hot-formed springs are generally large in size. To ensure large cross-secti

In order to improve the reliability, the system adopts an electronic disk; in the program retrieval mode, the part program can be read into the memory from the electronic disk to prepare the blade for work; in the parameter setting mode, the processing parameters of the machine tool are fast forwa

1. Policy regulations and main basis:. (Administrative Measures on the Acquisition of Vehicle Purchase Taxes, Finance and Tax [2005] No. 139, Financial and Tax [2005] No. 111) 2. The applicable scope and conditions of the policy: 1 Vehicles used by foreig

Truck transport encounters a variety of different road conditions, and its driving environment is much more complex than a family car. Therefore, the comprehensive protection of the engine under complex and variable road conditions prolongs the service life