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This paper proposed a model of contactless power transfer system (CPTS), which adopted a transformer with big air-gap and long primary wires. The system has the characters of long leakage inductance, small magnetizing inductance and low coupling coefficient. It makes the transmission efficiency very low, this model improved system efficiency by adopting resonance of compensation capacitance and leakage...
The paralleling DC/DC converters via primary current droop current sharing control is presented in this paper. Firstly, the steady state droop voltage characteristics are deduced from the output voltage regulation specification and then the parameters of the feedback weighted voltage resistor network can be determined accordingly. Hereafter, the inner loop voltage controller of the converter is designed...
This paper presents a bi-directional converter with a buck/forward active clamp, which can be used in 360 V dc-link and 100 V battery of a dc generation PV system. This topology can achieve turn-on and turn-off zero-current-transition (ZCT). In buck operation mode, the converter is operated with synchronous rectification and with an active clamp, which is realized with a forward snubber. With this...
In this paper, a new efficiency-optimized space-vector-modulation direct torque control (DTC) scheme is proposed and implemented for induction motor drives. Different from the traditional DTC, in which the flux linkage reference value is set as the rated value, the flux linkage reference value in the proposed DTC is online updated according to the instantaneous load torque and rotational speed by...
Performance investigations and drive designs of an interior permanent magnet (PM) machine, in both the constant torque and the flux-weakening operating regions, are generally conducted based on the machine parameters that are calculated from finite element analysis (FEA). To properly select the optimal current control angles for maximum torque generations at various speeds, this paper presents thorough...
Based on the redevelopment of control rule base, a modified type PI-like fuzzy logic controller with output scaling factor (SF) self-tuning mechanism is proposed and experimentally testified in this paper for application in the switched reluctance motor (SRM) drive system. This paper aims to simplify the structure hierarchy and computational complexity of the controller by reducing the number of fuzzy...
The paper presents an investigation on the direct instantaneous torque control (DITC) of a 1-hp four-phase 8/6 switched reluctance motor (SRM). In the proposed technique, the instantaneous phase torque was estimated in real-time using a pre-stored look-up table of measured static torque, T(i, ??), where phase current and phase flux linkage were input parameters. Therefore, a high-resolution encoder...
This paper discuses the printed circuit board (PCB) winding of the contactless power transmission system comparing the traditional transformer power transmission system. In this study, the contactless power transmission system is successfully applied to the wireless mouse for stable power supply. To examine the feasibility of the proposed system in this paper, a contactless power transmission system...
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