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Zhang F.,Shenyang University of Technology | Jia G.,Shenyang University of Technology | Jia G.,CRRC Zhuzhou Electrical Locomotive Research Institute Co. | Zheng Y.,Shenyang University of Technology | And 2 more authors.
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | Year: 2016

A new brushless electrically excited synchronous machine (BEESM) is proposed, which is originated from the brushless doubly fed machine. It eliminates the brushes and slip rings so as to improve the reliability and reduce the maintenance cost. The proposed motor is characterized by two sets of stator windings with different pole numbers, acting as the three-phase armature winding and the exciting winding respectively. The structure and operating principle of the machine are introduced. And the equivalent circuit and electromagnetic torque expression of BEESM with a magnetic barrier rotor and a hybrid rotor are deduced. In order to study the effect of different rotor structures on the performance of BEESM, the operating characteristics of this kind of machine are simulated. And two prototypes with the same stator and two different rotors are manufactured. The inductance parameters are measured and the experimental researches on different operation modes are done. The simulation and experimental results indicate that the BEESM with hybrid rotor has a good performance of starting and synchronous operation with load. However, the efficiency of the BEESM with magnetic barrier rotor is little higher. © 2016, The editorial office of Transaction of China Electrotechnical Society. All right reserved.

Jiang G.,CRRC Zhuzhou Electrical Locomotive Research Institute Co. | Tang J.,CRRC Zhuzhou Electrical Locomotive Research Institute Co. | Zhou X.,CRRC Zhuzhou Electrical Locomotive Research Institute Co. | Ren M.,CRRC Zhuzhou Electrical Locomotive Research Institute Co.
Lecture Notes in Electrical Engineering | Year: 2016

Aiming at improving the performance and reducing cost of real-time- Ethernet-based control system, a new multiprocessors reconfigurable embedded platform is proposed in this paper. The asymmetric dual NIOS II processors are adopted in this platform. The application software is executed in one processor, and the real-time Ethernet protocol runs on the other processor. The μC/OS-II operating system runs on both of the processors as RTOS. A novel technique for inter-processors’ communication is proposed as well. The implementation of the system is described, and the comparison between the proposed platform and the traditional platform is made in this paper. © Springer-Verlag Berlin Heidelberg 2016.

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