After a long period of development, China's construction machinery industry has reached a considerable scale and technological level, capable of producing products that are close to and reach the international leading level, and has developed brands that enjoy a certain degree of international recognition. The industry has basically formed a complete system. At present, China has surpassed the United States, Japan, and Europe to become the world's largest construction machinery market, which means good investment opportunities for investors. The large-scale infrastructure construction and the development of national strategic emerging industries will directly drive the continued development of the construction machinery market.

1. Electrical Engineer Electrical engineering and technical personnel engaged in surveying, planning, design, power engineering construction, installation, commissioning, technology development, experimental research, power generation and supply operation, maintenance, repair, power grid dispatch, electricity management, power environmental protection, power automation, technical management, and other related work. The registered electrical engineer qualification examination adopts a national unified outline and unified proposition examination system, and is generally held once a year.

A single-phase asynchronous motor consists of a stator, a single-phase asynchronous motor rotor, bearings, a casing, end caps, etc. The stator is composed of a machine base and an iron core with windings. The iron core is made of stacked silicon steel sheets punched in grooves, and two sets of main windings (also known as running windings) and auxiliary windings (also known as starting windings forming auxiliary windings) are embedded in the grooves at a 90 ° electrical angle to each other. Main winding assembly

The use and maintenance of motors are often overlooked by people. Whether a motor can achieve maximum economic benefits, extend its service life, etc., correct use and daily maintenance are key issues. (1) Starting: Before starting the motor, a mechanical inspection should be carried out, such as checking whether the shaft is flexible; Bearings should be properly lubricated; The fan and fan cover should not collide, and the fixing rate of the motor base should not be affected. Then it is necessary to inspect the circuit and check whether the motor leads are connected correctly. Some motors have only two wires in the outlet box, which is easy to connect correctly, while others have four wires. In this case, it is necessary to follow the relevant instructions for connection, otherwise the motor will be burned out. The wire ends must be firmly connected; It is best to install a fuse in front of the motor socket, and the ampere rating of the fuse should be about 10-25% higher than that of the motor.

Centrifugal switch is an electrical switch commonly used in signal phase induction motors and phase separated induction motors. The patent for centrifugal switches was granted to Royal Lee in the 1920s. This switch is used to provide control switch operation, which is necessary when the motor generates the specified motor speed. Earlier, before the invention of this switch, in order to simplify the design of the motor, the switch was located inside the motor. This design is very unsatisfactory as it causes oil, dust, and grease to accumulate on these switches. Conversely, it makes the contact operation unreliable.

Congratulations on the establishment of Ningbo Zhenhai Sanyun Technology Co., Ltd! Congratulations on the establishment of Ningbo Zhenhai Sanyun Technology Co., Ltd! Congratulations on the establishment of Ningbo Zhenhai Sanyun Technology Co., Ltd! Congratulations on the establishment of Ningbo Zhenhai Sanyun Technology Co., Ltd!