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In this paper, a novel human position estimation system using electric-field resonance coupling is proposed. There are various advantages of using electric-field for human position estimation system. The system is robust to illumination change, body-worn tags are not required and sensors could be hidden since electric-field can path through an insulator. Tags are not required because the system estimates...
This paper deals with a novel configuration of single-phase hybrid active power filter. One of the advantages of the proposed hybrid filter is its adjustable capability to determine voltage rating and current rating of active power stage by selecting appropriate values for its passive filter parameters. Equivalent circuit of proposed hybrid filter has been presented and its filtering characteristic...
In this work, an ab-initio study of the electrical response to odorants of a self-assembled monolayer of a pig OBP immobilized onto a miniaturized Si-substrate equipped with gold interdigitated electrodes (IDE), was started. Electrical impedance spectroscopy (EIS) was used as electrical characterization technique and a dedicated experimental set-up was arranged in order to carry out EIS measurements...
In this paper we present a solar harvester test chip, realized to characterize several integrated solar cell structures, gathering the information required to design a complete power management system for handling the harvested energy. In particular, we realized photodiodes with three different geometries of the p-diffusion, and three different dimensions of the n-well. The chip is realized in a 0...
A novel stepped-impedance resonator (SIR) and its simplified equivalent circuit are proposed in this paper. The frequency responses of the SIR with different sizes are analyzed by the full-wave electromagnetic (EM) simulator. A novel low-pass filter (LPF) with two transmission zeros is designed and fabricated based on the SIR. The measured 3 dB cutoff frequency fc is 7.2 GHz with 0.3 dB ripple level...
In order to meet the requirements of the traceability and transfer of the voltage value in the building of 1000 kV ultra-high voltage (UHV) power grid, this paper presents a principle of series standard potential transformer (SSPT) based on the theory of power frequency voltage summation method, in which the arrangement of primary windings are conventional, but the series circuits of secondary voltages...
A brushless doubly-fed machine with tooth-harmonic wound rotor is a new type of BDFM. The machine is intended for use as a variable speed generator, or drive. Maximum torque output may be obtained by optimally dividing the overall magnetic loadings and electric loadings between the stator windings attending by reasonable rotor winding. This paper proposes an improved particle swarm optimization algorithm...
This paper presents a mathematical model for a novel quantum series resonant inverter. This inverter can operate in six resonant modes. The differential equations derived from its equivalent circuit in all operation modes are generalized. At the same time, using the new control technique, the quantized output level which is inherent in the quantum converter can be completely overcome. Thus the output...
In view of large variation of output voltage of the self-excited single-phase induction generator, this paper presents a connection method of voltage self-regulation of the single-phase self-excited induction generator with series capacitance, which decreases the generatorpsilas voltage variation rate. The operation of self-excited single-phase of the three-phase induction generator is analyzed by...
A method for calculating the performance of double-sided linear induction motor (DLIM) with short secondary is presented in this paper. The analytical solution of air gap flux density is firstly deduced from one-dimensional (1-D) electromagnetic field equations, then in the equivalent circuit of the motor, to take both longitudinal and transverse end effects into account, the correction coefficients...
Transient noise that accompanies with electrical arc and contacts bounce is generated when the apparatus contacts operate, which is main source of conducted electromagnetic interference (EMI). The transient noise is non-periodic thus can not be measured by a spectra analyzer. Its prediction and diagnosis are also different from periodic noise. A contact set model that taken into consideration parasitic...
In this paper, the electromagnetic compatibility susceptivity (EMS) of a DC SSR with interference of voltage dips and short interruptions was investigated. The high frequency model of SSR considering model parameters of BJT (bipolar junction transistor) and parasitic parameters of wires on PCB was proposed to obtain the equivalent circuit and then predict EMS of SSR with voltage dips and short interruptions...
This paper presents a strategy of matrix converter driving three-phase brushless DC motor (BLDCM) with trapezoidal back electromotive force. The matrix converter is described as an equivalent circuit combining virtual rectifier stage and virtual inverter stage. Input current space vector modulation and 120deg conduction mode are employed in these two stages respectively. An important part of this...
The model equivalent circuit is identified. From motor manufacturers test report, parameters Ra, and Xm are calculated. The rotor parameters X12, X1, X2 ,R1, R2 and stator parameter Xa are determined by using direct search optimization method. The starting and running performance values are calculated and compared with available values. From estimated parameters, the transient and sub-transient reactance...
It was considered that the precondition of generating high frequency radiation was that the appended capacitor brought oscillating current signals in an explosive magnetic generator of frequency (EMGF). As a result, on the basis of equivalent circuit, by analyzing the energy losses, the variation of EMGF's current was studied, and the reason for the fish-shaped envelope of oscillating current was...
In ungrounded neutral system the over-current in the primary of electromagnetic potential transformer (PT) due to single-phase-to-earth fault takes place frequently. This paper focuses on the transient analysis of the above over-current phenomenon. Base on the equivalent circuit and the electromagnetism character of PT, we deduce the transient equation of PT current and disclosure the essence reason...
This paper presents a new DTC algorithm for induction machine drives capable of reducing the common-mode conducted emissions of the drive. It is based on the application of only odd or only even voltage vectors in each sector in which the stator flux lies. In the work, after an overview of the genesis of common mode emissions of inverter fed drives and the most employed techniques for their minimisation,...
Thermal models are often used in motor overload protection relays to predict rotor temperature. Under impaired cooling conditions, the parameters in the thermal models need to be tuned accordingly to reflect changes in the motor cooling capability. The tuning process requires accurate rotor temperature as a reference signal. This reference signal is estimated from the rotor resistance based on the...
An equivalent circuit method describing the free stator of piezoelectric motor is presented in this paper, while the circuit elements have complex values. The mechanical, dielectric and piezoelectric losses associated with the vibrator are accounted for by the imaginary components of the circuit elements. It is shown that the calculation of the circuit parameters from the complex elastic, dielectric...
In this paper, the detailed analysis and design for DC-AC buck inverter with sliding mode control is presented. As the new inverter is composed of two independent current bi-directional buck converters, the sliding mode controller is analyzed by an equivalent circuit. The design of the sliding surface coefficient is analyzed according to its relationship with the dynamic response of the system, the...
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