What Is Great Contribution to 400km/h Train?TQ800 Permanent Magnet Synchronous Traction Motor

Introduction of TQ800 Permanent Magnet Synchronous Traction Motor

The train is designed to operate at a speed of 400 km/h and can run on international railways with different climate conditions, track gauges and power supply standards. It features energy conservation, environmental protection, active safety and intelligent maintenance. The core power equipment of the train is the TQ800 permanent magnet synchronous traction motor. The TQ800 permanent magnet synchronous traction motor has a single-unit rated power of 800 kW, a power density index of 1.08 kW/kg, and can adapt to a low-temperature environment of -50°C. It also has multiple power supply modes and its overall performance reaches the international advanced level. It can be used in inter-connected high-speed trains. Compared with asynchronous traction motors, this traction motor reduces the per capita energy consumption by 12% per 100 kilometers. It saves over 2 million kilowatt-hours of electricity per year for a single train. It has comparative advantages such as higher power density, higher energy conversion efficiency, stronger environmental adaptability and lower life-cycle cost.

 Features of TQ800 permanent magnet synchronous traction motor

During the development process, it overcame many difficulties: First, it adopted a new closed air-cooling and key part directional cooling technology, ensuring the cleanliness of the motor interior and effectively balancing the temperature of each component of the motor, solving the problem of the limitation of motor power due to different temperature limits for each element. Second, it developed a new high-speed, built-in rotor magnetic circuit structure, solving the balance problem between electromagnetic performance and mechanical performance of permanent magnet motors at high speeds, making the rotor have both high mechanical strength and good magnetic isolation performance and effectively meeting the performance requirements of traction and braking of 400 km/h high-speed trains in the full speed range. Third, it integrated the advantages of insulation structures of high-power locomotives and high-speed rail traction motors, having higher insulation reliability and stronger environmental adaptability. This train is a major innovative achievement of China’s high-speed railway equipment in the new era.

Cost reduction and efficiency improvement, interconnection and interoperability

Through continuous research and development, the project team has developed a variable structure running system for high-speed EMUs. By using variable gauge bogies, the train can complete gauge change during operation, greatly improving the efficiency of cross-border transportation and reducing transportation costs. At the same time, the train has strong environmental adaptability and can operate in temperature conditions ranging from ±50°C. It can also meet different traction power supply standards and railway transportation standards, achieving interconnection and interoperability on 90% of the world’s railway networks. Green noise reduction, energy conservation and environmental protection.

Green Energy Conservation and Environmental Protection

Green energy and environmental protection are the future development trends of high-speed EMU technology. By adopting the “multi-objective balanced comprehensive energy-saving technology,” the train reduces per capita energy consumption by 10% per kilometer and noise by 2 decibels under the same operating speed conditions. This means that when the train operates at 400 km/h, its energy consumption and noise level are the same as those of high-speed EMUs operating at 350 km/h. It increases speed without increasing energy consumption, making it a green train that is energy-efficient and environmentally friendly.

Intelligent Guarantee, Safety and Reliability

Safety is the top priority for high-speed EMUs. By applying intelligent composite sensor technology, big data technology and feature extraction technology, the train can achieve intelligent assessment, status diagnosis and early warning alarm during operation. At the same time, through on-board equipment, vehicle-ground data transmission and ground systems, a vehicle-ground integrated life-cycle management platform can be built to provide decision-making suggestions for train operation and maintenance, achieving active safety guarantee and intelligent maintenance. Under the meticulous organization of the High-tech Department and the High-tech Center of the Ministry of Science and Technology, and with the strong support of China State Railway Group Co., Ltd., the project was carried out by CRRC. CRRC Changchun Railway Vehicles Co., Ltd. led 30 key units from industry, academia and research to achieve breakthroughs in key core technologies such as high-speed EMU system integration, variable structure running gear, traction converter, and multi-objective optimization control of train operation. They have built a design, manufacturing and testing technology platform with generational characteristics and ultimately formed the technical, standard, equipment and service capabilities for cross-border interconnection high-speed EMUs.

China’s Contribution to The Development of High-speed Train

Based on the technology and product platform formed by the project, China’s equipment manufacturing enterprises can customize the production of interconnection high-speed train products according to the technical standards and operation service requirements of various regions around the world. This not only fully meets the future technology and construction operation development needs of China’s high-speed railways but also provides strong technical support for the “going global” of high-end equipment and the implementation of the “Transportation Powerhouse” strategy. At the same time, it also establishes a new leading technology and standard system for high-speed passenger transport equipment in global rail transit.