China's first SiC inverter technology permanent magnet direct-drive subway electric bus has begun train commissioning
News from Suzhou Rail Transit social media, recently, Suzhou Rail Transit Line 3 's first train equipped with a permanent magnet direct drive traction system The electric bus (No. 0312) has successfully completed the static adjustment part of the type test, which marks the official start of the commissioning of the Suzhou Rail Transit Line 3 permanent magnet direct drive project.
Train No. 0312 of Suzhou Rail Transit Line 3 is the first permanent magnet direct-drive traction system project in China based on silicon carbide (SiC) converter technology. The control method of its traction motor is axis control (1C1M), that is, each traction converter box contains four SiC inverter modules, and each module independently controls one motor. The traction motor is installed on the axle in a direct-drive axle-holding manner, eliminating the need to install a gearbox and coupling, achieving the purpose of lightweighting the vehicle. In addition, due to the use of complete SiC semiconductor technology to replace traditional IGBT technology, the switching frequency of the converter is greatly increased, and a quasi-sinusoidal output voltage is realized to drive a permanent magnet direct-drive motor solution, which significantly reduces the loss of the motor, so it can be realized Natural cooling of the motor. It improves system efficiency while reducing noise and improving passenger comfort.
(Source: Suzhou Rail Transit Social Media)
The "fastest subway" under construction in the country has officially started track laying
News from Guangzhou Metro social media, on July 10, on Guangzhou Metro Line 18 Hengli to Panyu In the track laying base of the No. 4 middle air shaft in the section of the square, operators slowly laid a 25-meter-long rail row on the tunnel base, marking that the "fastest subway" under construction in China has officially entered the track laying stage.
Guangzhou Metro Line 18 has a total length of 61.3 kilometers. It starts from Nansha Wanqingsha hub and ends at Tianhe Guangzhou East Station. It passes through Nansha District , Panyu District , Haizhu District and Tianhe District . There are 9 stations and 8 sections, with a design speed of 160km/h. Among them, 8 of the 9 stations are transfer stations. The longest distance between stations is 25.9 kilometers, which is the section from Hengli to Panyu Square. This is currently the subway section with the largest station distance in China.
As a high-speed subway line with a speed of up to 160km/h, unlike the overall track bed used in ordinary subway lines, Guangzhou Metro Line 18 is constructed according to the standards of high-speed rail, which greatly improves the smoothness of the subway line and passenger comfort. Among them, 1.23 kilometers of steel spring floating plate prefabricated track bed and 36.2 kilometers of vibration-absorbing pad prefabricated plate track bed are applied in schools, hospitals, residential areas and other areas. The steel spring floating plate prefabricated track bed is on the 160km/h track. This is the first time it has been used in transportation. The prefabricated slab track bed with vibration-absorbing pads is similar to the high-speed rail CRTS III slab ballastless track bed. It has a good vibration-absorbing effect and reduces the impact of train operation on environmental vibration and noise.
As of now, 67% of the civil engineering work of Guangzhou Metro Line 18 has been completed. Among the 9 stations, 1 has been capped, 7 are under civil construction, and the remaining 1 is undergoing pre-construction preparations; 8 sections are under civil construction, including the entry and exit lines of Longzhen parking lot, Wanqingsha depot, and Longzhen parking lot. Carry out civil construction.
(Source: Guangzhou Metro social media)
Alstom will provide the electromechanical system for Taipei MRT Shulin Line
After Alstom won the bid for the mechanical and electrical project of Wanda Line in 2018, Alstom has once again won the second phase of the line, Shulin. Line electromechanical system. In this contract worth 424 million euros, Alstom will provide 16 Metropolis platform rapid transit vehicles, Urbalis CBTC system, data acquisition and monitoring system (SCADA) for the 13.3-kilometer-long Shulin Line with a total of 13 stations. ) and screen doors. The Wanda-Zhonghe-Shulin Line is a medium-volume line under construction by Taipei MRT. The line is 22.1 kilometers long and has 22 stations, running through Taipei and New Taipei. The Wanda-Zhonghe-Shulin Line is constructed in two phases. The first phase is called the Wanda Line and the second phase is called the Shulin Line. The two phases of the line are expected to be put into operation in 2025 and 2028 respectively.
(Source: Alstom official website)
Middle East Airlines received the first A321 neo
Recently, Airbus delivered the first A321 neo to Middle East Airlines. This "Sunglasses Man" is quite handsome! It is believed that this efficient and comfortable new aircraft will continue to support the future development of Middle East Airlines.
(Source: Airbus social media)
Ronggui Station "has" Fuxing number Fuxing number
Recently, Guangzhou Railway has operated Lin G between Shenzhen North and Maoming on multiple weekends. Among them, the outbound train G9657 had to wait at Ronggui Station to avoid other trains, so Ronggui Station also had a Fuxing train that stopped to avoid other trains.
China Maritime Day
July 11th every year is China Maritime Day. This year's "China Maritime Day" event was held in Shanghai. For this purpose, the organizers specially organized the "Haixun 01" ship, the " Snow Dragon 2" polar scientific research icebreaker, the "East China Sea Rescue 204" ship and the "Haixun 166" The "Snow Dragon 2" carried the "Snow Eagle 301" AW169 helicopter that went on my country's 36th Antarctic scientific expedition to perform the Antarctic scientific expedition flight support mission. These four ships have made great contributions in my country's scientific expeditions, marine search and rescue, and in safeguarding my country's maritime rights and interests. Although it is not possible to visit the ships due to the epidemic, it is not worth the trip to see these ships.
(Picture: @ Water-soluble washing powder )
Tongtong is on the road
Changsha and Zhuhai G bus experience
Yesterday, the peak G bus between Changsha South and Zhuhai opened for the first time, and Tongtong also took the time to experience it. The train on duty is operated by CRH3C-3023 of Changsha EMU, which is also the smallest CRH3C assigned to Changsha. The first thing I felt when I got on the car was that it was really old, some of the seats were collapsed, and even the isolation door of the special class seat had some problems, but it still felt okay when running. P.S. When I passed the Guangzhou-Zhuhai Intercity Cuiheng Station under construction, I found that the progress of the station is very gratifying. I hope it will be opened as soon as possible!
