Multiport converters play a significant role in portable electronic and electric vehicle (EV) applications. In literature, different configurations of single-input multi-output (SIMO) converters are presented. Most of the SIMO converters generate the outputs with operating constraints on the duty ratio and charging of inductors. The cross-regulation problem is still a challenge in SIMO converters design. A SIMO topology is proposed in this study to overcome the limitations mentioned earlier. It can generate three different output voltages without constraint on the duty cycle and inductor currents (like iL1 > iL2 > iL3 or iL1 < iL2 < iL3). Cross regulation problems do not exist in the proposed topology, so the load voltage V01 (V02) (V03) is not affected by the variation of output current i03 (i02) (i01). The loads are isolated from each other during control. In the laboratory, a 200 W prototype circuit is developed; simulation and experimental results are validated.INDEX TERMS Multiport converters, single input multi output converters.
The DTC of PMSM is a kind of self control mode for its stator flux linkage and torque .It is very important that if stator flux linkage can be observed well and because the accuracy of the observer for stator flux linkage directly affects the performance of the DTC system of PMSM. In this paper ,for a torque drive with hysteresis controller in the current control loop will be implemented by writing a MATLAB program.
This paper presents the rotor flux and speed estimation of induction motor using a novel technique. The induction motor model in rotor reference frame is considered. Controllers used for sensor less control of the drive. The estimation technique works well and the sensor less speed control scheme can achieve fast transient response as good as that of the induction motor with sensors and at the same time maintain a wide speed control range.
This paper presents the rotor flux and speed estimation of induction motor using a novel technique. The induction motor model in rotor reference frame is considered. Controllers used for sensor less control of the drive. The estimation technique works well and the sensor less speed control scheme can achieve fast transient response as good as that of the induction motor with sensors and at the same time maintain a wide speed control range.
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