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In recent years safety accidents of large-scale wind turbine occur frequently. Because of the structure specialization of wind turbine, in case of an accident, the entire unit is often completely destroyed and economic losses will be very high. This paper presents some phased research results on serious wind turbine accidents and put forward appropriate countermeasures for different types of accidents.
Direct drive (DD) wind turbine has lots of benefits, such as low noise, small size and high efficiency in low wind speed, etc. therefore it will be the main model in future wind power market. This paper presents different structures of DD wind turbines from major wind power manufacturers and compares several main drive train structures. Result of this research can provide relevant reference for manufacturers...
The utilization of motor-in-wheel in the electric vehicle (EV) is a very important research topic. In order to simplify the control of EV, a new system is proposed by Guilin Tao, which changes the traditional configuration and control strategy of direct-wheel-driven EV. In this system two permanent-magnet-brushless dc motors (PMBDCMs) are connected directly in serial, in order to cut down the differential...
In this paper, the importance of rotor temperature monitoring of direct-drive permanent magnet wind turbine is explained, and the current development of the rotor temperature measurement is introduced. The design of rotor temperature measurement that we studied is proposed, and its feasibility is demonstrated. Finally, the future of temperature measurement technology applied to direct-drive permanent...
Liquid cooling is an effective method to cool the rotor of turbo generator. Evaporative cooling technology is the frontier field of liquid cooling technology at present. This paper reviews fluid cooling technology for rotor of turbo generator and introduces research progress on open channel evaporative cooling technology.
In order to research the anti-slip regulation (ASR) of electric vehicle(EV), this paper analyzes the operating principle and control strategy of electric vehicle's ASR, builds the motion model of the EV and vehicle dynamics model including the tyre, the wheel and the model between the tyre and the road. The traditional ASR structure is complex. In order to solve the problem, a novel anti-slip controller...
This paper establishes the conceptual model on perception evaluation of tourism E-commerce website, frames a new investigation scale based on WEBQUAL scale and sets up following hypothesis: first, there is a significant difference between the expectation and actual perception (HI); The personal attribute has a significant influence on actual perception(H2);component dimensions of website quality system...
This paper presents a wireless rotor temperature measurement system based on MSP430 monolithic processor and nRF401 wireless communication module. Hardware structure, function of main devices and software design are also introduced. Service condition indicates that this system is simple and easy-to-use and the temperature signal is stable and reliable. When temperature measurement of 10 points above...
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