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Energy Router(ER), as the key technology of Energy Internet (EI), is raising more attention in recent years, especially in distribution network. However, little work has been done for simplified models of ER, which will greatly improve the combined simulation speed of ER and distribution network. This paper proposed a simplified model based on a 10kV/40MVA multi-port Energy Router utilized in 10kV...
Core losses of nanocrystalline alloy high frequency transformer (HFT) are calculated by adopting the finite element method with magnetic hysteresis effects considered. A normal Preisach model is used to represent the magnetic hysteresis during the numerical simulation. The normal Preisach model features with simple formulations and easy parameters identification. A dynamic circuit model of laminated...
This paper is concerned with the process of current commutation and overvoltage protection in matrix converters. The mechanisms involved in the commutation process and clamp circuit are described and simulation waveforms are presented. A four-step semi-soft commutation strategy is described that this technique relies on knowledge of the output current direction and the ability to control the direction...
The photovoltaic (PV) array is one of the main components of the PV system, and the accuracy of the PV array model is directly related to the validity of the simulation results. The parameters of the PV array may change with the operation conditions. Therefore, it is important to identify the parameters of the PV array model according to the measured data. In this paper, the conventional four-parameter...
Safe and reliable of inverter is directly related to the normal operation of permanent magnet synchronous motor drive system. Therefore, in the paper, taking a 12.5kW Permanent Magnet Synchronous Motor (PMSM) as the research object, two-dimensional transient electromagnetic field calculation model based on vector control strategy is established, and the corresponding assumptions and boundary conditions...
In this paper the Parameters of a Double Layer Super Capacitor (DLC) Bank are experimentally identified online using Recursive Least Squares (RLS). In order to extract the signals suitable for the RLS a proper signal processing system has been implemented. Results have been verified with those obtained with an off-line common technique applied to the 2-branch model of the DLC.
The shortcoming of permanent magnet (PM) machine is the de-excitation problem under fault condition, which is a main issue for aircraft application. Thus, modeling different kinds of faults accurately is of great importance. This paper presents the comparison of three different modeling methods dealing with stator winding open circuit (OC) fault and turn-to-turn short circuit (SC) fault. The modeling...
This paper presents a space vector pulse width modulation and proportional resonant control scheme for single-phase three-level rectifier for electric railway traction applications. The proposed SVPWM modulation has been tailored to the single-phase rectifier without an additional PLL. Moreover, vectors and vectors sequence have been carefully designed to achieve neutral point voltage balance. Based...
A compact behavioral model for SiC power MOSFET is proposed. By applying more degrees of freedom in the channel current expression, removing the drift resistance and rectifying junction capacitance mathematical model, the proposed model can accurately reproduces those static and dynamic characteristics in datasheet. The convergence problem of original model is solved and less simulation time is needed...
Linear oscillating motor can produce linear reciprocating movement directly. Due to its special topology and motion type, segmented laminations are generally used as the stator core with coils wound inside. Though it contributes to eddy current elimination and air-forced cooling, the magnetic field suffers from severe saturation in the stator and affects the thrust output severely. In other words,...
A novel brushless hybrid-excitation axial flux machine (BHAFM) is investigated in this paper. It is designed for electric vehicle which requires the ability of wide speed range and high starting torque of machine. Adopting the special structure of claw poles, BHAFM realizes the function of hybrid-excitation without brush and slip ring. Meanwhile, contrasted with traditional permanent magnet synchronous...
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