In the face of the adverse effects and impact of the new coronary pneumonia epidemic, the scientific organization of Jiadian shares, actively respond to the war, in the fight against the epidemic prevention and control at the same time, highlight the key points, serious planning, overall grasp of product research and development and production and operation of the work, to ensure that the "Belt and Road" key projects on schedule delivery. Recently, Jiadian Co., Ltd. received good news from the project. The key product, Hengyi Brunei Variable Frequency (Synchronous) Starting Brushless Excitation Synchronous Motor, was put into use on the spot of users, with stable operation and excellent parameters, which was highly affirmed and praised by users.

TZYW7350-20/3250 motor field operation

Positive pressure shell type variable frequency (synchronous) starting brushless excitation synchronous motor is developed by Jiadian Co., Ltd. according to the operation requirements of the motor isolated network of Hengyi Brunei Project, a key project. The motor has the characteristics of low starting current, large starting torque, unrestricted grid capacity, convenient installation and maintenance, and high efficiency. While improving the starting capacity under heavy load conditions, it greatly reduces the impact on the grid and reduces the impact on the grid. Interference to other electrical equipment in the grid.
Jiadian R & D personnel in the motor development process to overcome many difficulties. The most important component of the motor is the exciter, due to the use of AC exciter, compared with the traditional DC excitation, because of its manufacturing difficulty, electromagnetic parameter adjustment is more difficult, coupled with the lack of domestic low-speed high-power frequency conversion synchronous start brushless excitation motor production experience can be used for reference, can only be calculated gradually through the basic formula. Through the unremitting efforts of R & D personnel, the AC exciter test prototype was finally successfully developed, and then the docking debugging test was carried out with the test prime mover. During the test, the R & D personnel accurately measured the input and output voltage, current, waveform distortion rate, rectifier waveform, AC/DC ratio, load characteristics and other parameters, and the final test results were basically consistent with the theoretical calculation values, ensuring the accuracy of the electromagnetic calculation.

AC exciter test prototype

Joint commissioning with prime mover

This type of product is developed for the first time by the company. Due to the lack of experience in debugging the motor, excitation device and frequency converter, in order to avoid the mismatch after the whole set of devices is transported to Brunei, entrusted by the owner, Jiadian Co., Ltd. and the owner jointly finalized the debugging outline and refined the test items, and jointly completed the product debugging work. The performance of the motor product is better than the requirements of the technical agreement, which has won the unanimous praise of the owner.

Joint commissioning site

After passing the test, the motor will be shipped to the site of Hengyi Petrochemical Brunei Project for complete machine assembly. At the same time, Jiadian sent two engineers to deal with and solve the technical problems in the installation process in time, which greatly improved the efficiency of on-site installation and commissioning.

Unpacking on site

Field assembly

After six months of careful assembly and debugging, the three motors with load reciprocating compressors were successfully tested and started to run at full load. The starting current, stator temperature, bearing temperature, vibration, noise and other indicators of the motors were all better than the requirements of the technical agreement. The owner highly recognized the quality of this batch of motors and gave them a high evaluation.
The motor runs smoothly at full load and is put into industrial use, marking that Jiadian has successfully mastered the core technology of variable frequency starting brushless excitation synchronous motor, breaking through the foreign monopoly on this technology, filling the domestic technology gap, and making a large-scale unit in China. Laid a solid technical foundation.