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Intermediate coils are used in wireless power transfer to improve system performance, such as power transfer capability and efficiency. However, they can have adverse effects if used improperly. This paper focuses on the coil coupling stage of three-coil series-compensated wireless power transfer systems and analyses the effects of the intermediate coil under different conditions. When the coupling...
A new high-voltage-tolerant level shifter is proposed and verified in a 0.18-µm CMOS process with 1.8-V/3.3-V devices, whereas the operation voltage can be up to 12V. The output signal of high-voltage-tolerant level shifter has an offset of 3 times the normal supply voltage (VDD) of the used technology with respect to the input signal. The converting speed of level shifter is improved by using the...
In this paper, a 13.56 MHz power-efficient CMOS active rectifier is proposed for implantable medical devices. The digital offset compensation technique automatically compensates the turn-off delay to minimize the reverse leakage current to improve the conversion efficiency. The simulation results show that the proposed rectifier achieves 92.9% PCE with wide input voltage range. The input operating...
In this paper, a new coupling circuit is presented. This circuit uses a new method of subthreshold region biasing to decrease the value of coupling capacitor. In proposed circuit the Coupling capacitor is decreased about 98% in comparison with the ordinary capacitive coupling circuit. In addition, the proposed coupling circuit achieves higher linearity. The performance evaluation of proposed circuit...
Historically, two classes of coupling circuits have been used for power-line communications (PLC), being capacitive couplers and inductive couplers. In this paper, resistive coupling as a radical and novel approach is investigated specifically for the reception of PLC data. The main goal of this new approach, is to reduce costs associated with traditional capacitive and inductive couplers, seeing...
This paper proposes to analyze the influence of the displacement of the capacitor plates on the performances of an electrical coupled contactless power transfer system. The armatures are of circular form and the values of their radii are different. Some formulae are obtained and based on them graphical representations are made in order to analyze the nonlinear behavior. Then these variable values...
Electromagnetic Compatibility (EMC) filters for power electronic devices are strongly influenced by magnetic couplings between all components in the system. Therefore, several methods were proposed to predict these influences. Although a precise simulation can be realized utilizing the past methods, it is not practical to consider the all existing couplings especially for a development process in...
This paper describes the new soft-switching boost-type dc-dc converter with the coupling inductor for the continuous current mode operation. This configuration enables zero current switching at turn-on in continuous current mode operation. The coupling inductor can commutate the primary side current at turn-off to realize the zero current switching at turn-on and can suppress the overvoltage of the...
This letter is concerned with the strategy adopted by an active compensator to mitigate the flicker phenomenon in a power system. After illustrating two conventional strategies, a novel strategy that forces the compensator to deliver a particular value of the instantaneous imaginary power absorbed by the time-variant load is proposed. The strategy is compared with the two conventional ones in terms...
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