China's Chinese car Guo Shuying: Electric drive technology will develop multiple routes in parallel

On January 20, 2018, Guo Shuying, chief expert of CRRC Zhuzhou Institute and one of the founders of CRRC Electric, who attended the China Electric Vehicle Association of 100, made a prospect for the future development of electric drive systems, especially motors, in an interview with the media.

　　

 

It is understood that from the initial air-cooled asynchronous motor to a more efficient, lighter and smaller water-cooled permanent magnet synchronous motor, from the "863" project of new energy vehicles in 2002, to the successful application of the fifth generation pure electric drive system platform-"T" power, the electric drive technology of CRRC continues to improve, and now it is developing in the direction of permanent magnet, high speed, integration and intelligent control.

　　

 

Guo Shuying said: "At present, most domestic commercial vehicle companies use traditional centralized drive motor systems. On the basis of this maturity, China Car Electric has developed wheel motors and hub motors."

It is understood that the in-wheel motor adopts a distributed drive mode, which integrates the power, transmission and braking devices into the hub. Compared with the traditional centralized drive, it does not require mechanical transmission parts such as gearboxes and axles, and eliminates intermediate links. Greatly improve the efficiency of energy transmission and extend the service life of the vehicle. In addition, it is also very important that the hub motor can achieve a real low floor, which is very suitable for buses or airport ferries, and the demand is large. Of course, the in-wheel motor drive system also has some technical problems to be solved. For example, all components are highly integrated, and their heat dissipation problems and electromagnetic compatibility problems are all difficulties that need to be overcome. For passenger car applications, the handling comfort caused by the unsprung weight should also be considered.

Guo Shuying introduced: "In the car electric hub motor has been applied to some special vehicles, the effect is obvious. The next step, the car electric plan will be applied to the hub motor developed by the car Zhuzhou intelligent rail train. In the future, in the electric drive technology route or will use centralized drive, wheel, hub motor multiple routes parallel development approach."

　　

 

Speaking of the advantages of developing in-wheel motors, Guo Shuying said: "Like centralized drive, the core component of in-wheel motor drive system is IGBT, which is still the key to its technology. In terms of switching devices, CRRC began to develop high-power semiconductor devices in 1964 and entered the IGBT field for the first time in 2008. In 2014, CRRC independently developed IGBT chips and modules and applied them to rail transit in batches; at present, it has covered the full voltage range from 650V to 6500V, and has begun to be applied in batch in the motor drive system of self-produced commercial vehicles, and has achieved export. Based on the research and development foundation and mature technology of rail transit, these key devices, including the next generation of wide band gap semiconductor devices, are all developed by CRRC. With years of development and application experience and advantages, including the integration of power electronics, heat dissipation and electromagnetic compatibility issues, are the technical advantages of CRRC, and these problems will also be solved."

It is foreseeable that in the next few years, with the continuous development of my country's new energy vehicle industry and the gradual maturity of in-wheel motor technology, in some fields, more and more electric vehicles in my country will adopt in-wheel motor drive systems. The electric drive system technology of Zhongche Electric will also bring more help to the industry and lead the development of the industry.

　　

 

It is understood that the in-wheel motor adopts a distributed drive mode, which integrates the power, transmission and braking devices into the hub. Compared with the traditional centralized drive, it does not require mechanical transmission parts such as gearboxes and axles, and eliminates intermediate links. Greatly improve the efficiency of energy transmission and extend the service life of the vehicle. In addition, it is also very important that the hub motor can achieve a real low floor, which is very suitable for buses or airport ferries, and the demand is large. Of course, the in-wheel motor drive system also has some technical problems to be solved. For example, all components are highly integrated, and their heat dissipation problems and electromagnetic compatibility problems are all difficulties that need to be overcome. For passenger car applications, the handling comfort caused by the unsprung weight should also be considered.

　　

 

Guo Shuying introduced: "In the car electric hub motor has been applied to some special vehicles, the effect is obvious. The next step, the car electric plan will be applied to the hub motor developed by the car Zhuzhou intelligent rail train. In the future, in the electric drive technology route or will use centralized drive, wheel, hub motor multiple routes parallel development approach."

　　

 

Speaking of the advantages of developing in-wheel motors, Guo Shuying said: "Like centralized drive, the core component of in-wheel motor drive system is IGBT, which is still the key to its technology. In terms of switching devices, CRRC began to develop high-power semiconductor devices in 1964 and entered the IGBT field for the first time in 2008. In 2014, CRRC independently developed IGBT chips and modules and applied them to rail transit in batches; at present, it has covered the full voltage range from 650V to 6500V, and has begun to be applied in batch in the motor drive system of self-produced commercial vehicles, and has achieved export. Based on the research and development foundation and mature technology of rail transit, these key devices, including the next generation of wide band gap semiconductor devices, are all developed by CRRC. With years of development and application experience and advantages, including the integration of power electronics, heat dissipation and electromagnetic compatibility issues, are the technical advantages of CRRC, and these problems will also be solved."

　　

 

It is foreseeable that in the next few years, with the continuous development of my country's new energy vehicle industry and the gradual maturity of in-wheel motor technology, in some fields, more and more electric vehicles in my country will adopt in-wheel motor drive systems. The electric drive system technology of Zhongche Electric will also bring more help to the industry and lead the development of the industry.

　　

 

It is understood that the in-wheel motor adopts a distributed drive mode, which integrates the power, transmission and braking devices into the hub. Compared with the traditional centralized drive, it does not require mechanical transmission parts such as gearboxes and axles, and eliminates intermediate links. Greatly improve the efficiency of energy transmission and extend the service life of the vehicle. In addition, it is also very important that the hub motor can achieve a real low floor, which is very suitable for buses or airport ferries, and the demand is large. Of course, the in-wheel motor drive system also has some technical problems to be solved. For example, all components are highly integrated, and their heat dissipation problems and electromagnetic compatibility problems are all difficulties that need to be overcome. For passenger car applications, the handling comfort caused by the unsprung weight should also be considered.

　　

 

Guo Shuying introduced: "In the car electric hub motor has been applied to some special vehicles, the effect is obvious. The next step, the car electric plan will be applied to the hub motor developed by the car Zhuzhou intelligent rail train. In the future, in the electric drive technology route or will use centralized drive, wheel, hub motor multiple routes parallel development approach."

　　

 

Speaking of the advantages of developing in-wheel motors, Guo Shuying said: "Like centralized drive, the core component of in-wheel motor drive system is IGBT, which is still the key to its technology. In terms of switching devices, CRRC began to develop high-power semiconductor devices in 1964 and entered the IGBT field for the first time in 2008. In 2014, CRRC independently developed IGBT chips and modules and applied them to rail transit in batches; at present, it has covered the full voltage range from 650V to 6500V, and has begun to be applied in batch in the motor drive system of self-produced commercial vehicles, and has achieved export. Based on the research and development foundation and mature technology of rail transit, these key devices, including the next generation of wide band gap semiconductor devices, are all developed by CRRC. With years of development and application experience and advantages, including the integration of power electronics, heat dissipation and electromagnetic compatibility issues, are the technical advantages of CRRC, and these problems will also be solved."

　　

 

It is foreseeable that in the next few years, with the continuous development of my country's new energy vehicle industry and the gradual maturity of in-wheel motor technology, in some fields, more and more electric vehicles in my country will adopt in-wheel motor drive systems. The electric drive system technology of Zhongche Electric will also bring more help to the industry and lead the development of the industry.