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A composite sliding mode field-oriented control (FOC) for linear induction motors (LIM) is developed in this paper. A new sliding-mode observer-controller scheme is designed to provide a line speed tracking, in which the observer can estimate the load thrust and feed back to controller for small switching gain of sliding mode controller. The control scheme also incorporates super-twisting sliding...
A sensorless three-level neutral-point-clamped inverter-fed induction motor drive is proposed in this paper. The conventional direct torque control (DTC) switching table fails to consider the circuit limitations, such as neutral-point-balance and smooth vector switching, caused by the topology of a three-level inverter. Two kinds of modified schemes for three-level DTC are proposed to solve these...
Compared with the normal database, the embedded database has some distinct features, such as small volume, necessary functions, portability, and robustness and so on. This paper analyses the Berkeley DB. Embedded database Berkeley DB used in network performance manage system, resolving the problem of storage system in NPMS, improving the speed of storing and retrieving of the system, ameliorating...
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