Research on Permanent Magnet Constant Voltage Device for Vehicle
Firstly, the improved quadratic regression orthogonal design method is proposed. Secondly, the indoor physical experiment is carried out on the main affecting factors for the permanent magnet constant voltage device for vehicle application, and meanwhile, the corresponding output voltage and current mathematical model is established by means of the statistical analysis, mathematical model establishment. Finally, the influence mechanism of the different speed and frequency on the output voltage and current is analyzed. This research can provide an important basis for study of the permanent magnet constant voltage device.
Operating control of efficiently generating induction motor for driving hybrid electric vehicle
In this paper, the principle of induction motor for driving hybrid electric vehicle (HEV) is analyzed when running in state of generator. Based on the induction motor's equivalent circuit, it is concluded both the slip range when feeding back to storage battery and the optimum slip at peak generating efficiency. The generator can operate at peak efficiency in terms of the optimum slip controlling excitation current and frequency of induction motor. An optimum slip vector control system of induction motor for driving HEV is designed. The experimental results are satisfactory. Analyzing and testing in this paper will provide theoretic and experimental support for optimum control of HEV.
Frequency selective surface design for blinds applications
In this paper, the reconfigurable blind structure with frequency selective surfaces(FSS) for the building applications are presented. Frequency transmission characteristics for different angles of the proposed blind-FSSs are investigated and verified through simulation and measurement. The simulation results show that we can implement the reconfigurable blind-FSS for multiband wireless applications. To verify the proposed paper, two kinds of blind-FSSs, crossed dipole FSS and circular ring FSS are fabricated and measurements are performed for different angles. The proposed structure in this paper which is very simple, can be easily applied to any planar surface for wireless security applications at low cost.