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Limit violations may occur by power systems operation, such as: voltage level at buses, loadings of transmission lines and power transformers, etc.. If violations are detected in the supervision process, corrective measures may be carried out in order to eliminate them or to reduce their intensity. Loading shedding is an extreme solution and should only be adopted as the last control action. It is...
Nowadays, many industries use the Computerized Numerical Control (CNC) for Printed Circuit Board (PCB) drilling machines in industrial operations. It takes a long time to find optimal tour for large number of nodes (up to thousands). To achieve more effective results, optimization systems approach is required to be equipped in drilling machine. Euclidean Traveling Salesman Problem (TSP) is one of...
The packer switching service of the third-generation mobile communication network (3G) has provide a broader range of services, while wireless local area network (WLAN) has a faster speed in information transmission, thus making these two complementary functionally. However, with the improvement of technology and increasing of mobile users, it has a significant impact on network communication when...
In this paper a global co-simulation methodology for concurrent/simultaneous analysis of passive and active analog/digital parts is proposed. An original power-signature concept is introduced to model high-speed digital modules temporal and spatial distribution of their power switching activity through specified chip partitions. Dedicated real-world NXP-Philips-Semiconductors active modules mounted...
The high power electromagnetic pulse (EMP) with sufficient radiating energy can penetrate and interfere on all kinds of radars. This paper studies the interference effect of high power EMP on paraboloid radar and AESA radar respectively. The coupling EMP (5us duration) energy via main lobe and side lobe into a paraboloid radar antenna is calculated. The distance and other parameters at which the sensitive...
Switched reluctance motors (SRM) have gained more popularity in recent years because of their simple structure, low cost, high reliability, and high torque-to-mass ratio. However, the applications of the SRM have been limited because of their large torque ripple, which causes noise and vibration problems. In order to solve these problems, Ca novel direct torque control (DTC) methodology is directly...
To reduce the flux and torque ripples, the paper modifies the synthesizing technique, proposes ldquo24 vectorsrdquo method and ldquo24 vectors + altering modulation indexrdquo method, which can be implemented to achieve favorable stator flux linkage and torque control performance in three-level induction motor direct torque control (DTC) system. The improvement of motor performance by proposed schemes...
Four-switch three-phase inverter (FSTPI) is usually adopted as the topology for continuous fault-tolerant operation of a direct torque (DTC) system when inverter fault occurs. Due to that the FSTPI can only provide four voltage space vectors with unequal amplitude, the DTC system performance will deteriorate to a certain extent. To enhance the performance of permanent magnet synchronous motor (PMSM)...
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