The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this paper, we propose the method to realize high efficiency control for IPMSM (Interior Permanent Magnet Synchronous Motor). In this method, we pay attention to the torque equation. We realize high efficiency control by controlling the vector angle of stator current. As for the high efficiency control, we define the optimum angle as the stator current angle which makes the torque biggest against...
This paper proposes a black box approach which synthesizes lumped circuit model of the Foster type for a frequency-dependent characteristic element by the least squares method systematically. However there are two numerical difficulties to model them. One is the numerical stability problem which comes from limitation of effective numerical digits of data especially for wide frequency band ranges....
In order to design a high performance power electronics circuit, a precise simulation environment is essential for the controller design. In this paper, a power electronic circuit real-time simulator was designed and realized on a DSP chip. The dynamic equations of a power electronics circuit were coded on a Texas Instruments (TI) made C6416 fixed point DSP. Meanwhile, the interrupt interface of the...
This paper presents a 2-D nonlinear time-harmonic finite element model of induction motor for use in the accurate dynamic simulation. In the proposed model, it is not necessary to rotate the rotor, the resistivity of the rotor material is modified in terms of the specified load condition. The nonlinear properties are represented by using the effective magnetization curve. The field-coupled circuit...
A new fast hybrid control approach of the pq control theory applied to the 3 phase 4 wire active power filter is proposed. The mathematical model developed is based on the direct power control theory using the pq theory. This technique inherits not only the simplicity of the conventional direct power control but also offers a good dynamic response in active filtering. The analysis is verified using...
This paper presents an advance stratagem to prevent contingencies and solve the optimal problem of economic and security dispatch. The dispatch takes outage and limitation of technical constraints into account. In order to ensure state steady stability for accidents, preventive control algorithm (PCA) based on the generalized reduced gradient method processing a preventive contingency set jointly...
This paper introduces a novel simulation algorithm for closed loop frequency response analysis by Fourier Transform Method (FTM). FTM is reviewed briefly and novel analysis algorithm is described. The simulator employing this novel algorithm is developed and demonstrated for a buck converter with feedback. The simulation result is in good agreement with the experimental result.
This paper presents an effective method to improve the dynamic performance of permanent magnet synchronous motor(PMSM) servo system which can be implemented via on-line PI self-turning. The algorithm is deduced from the relationship between PI adaptive parameters and the inertia of the PMSM servo system. The proposed method is simple and easy to implement for realtime application. Simulation results...
This paper presents the family of the single-inductor multi-output DC-DC converters. Conventional transformer-based multi-output DC-DC converters are proposed to provide multiple output voltages, which, however, have the drawbacks of high cost and large volume. Therefore, the single-inductor multi-output three-terminal configuration is developed in order to reduce the component count and cost for...
In the power system, the controllable reactor can be used as reactive power compensation device to limit over-voltage operation, reduce no-load or light load loss and improve transmission capacity. It is with characters of simple structure, easy maintaining, low cost and high stability, etc. The magnetic field is closely related to the reactor performance. In this paper, aiming at a controllable saturated...
Low speed control is indispensable to several servo applications. Generally, motor speed obtained from the so-called M method is averaged by counting the number of pulses from the coupled encoder at a fixed time period. As a result, for speeds lower than the minimum measurable value determined by the sampling frequency and the resolution of the encoder, a long detection delay time may degrade the...
The main purpose of this paper is to develop a photovoltaic simulation system with maximum power point tracking (MPPT) function using Matlab/Simulink software in order to simulate, evaluate and predict the behaviors of the real photovoltaic system. A model of the most important component in the photovoltaic system, the solar module, is the first to have been established. The characteristics of the...
Two control schemes for active and reactive power of a double-fed induction generator with the stator connected direct to the constant frequency, three phase grid are described. First the direct and quadrature rotor current components are generated based on the mathematical model of the machine. The second scheme used a PI controller to generate the rotor current reference components. The principles...
In this paper, a frequency control method is introduced for photovoltaic-diesel hybrid system by using a load estimator and an energy storage system. The proposed method is compared with a fuzzy based frequency control method. Simulation results show that the proposed method is feasible to reduce the frequency deviations of the isolated power utility and delivers maximum power compared to the fuzzy...
Computational fuel cell dynamic (CFCD) modeling is considered the most accurate tool for a better FC design and understanding. CFCD models have already proved the effect of the water membrane content in the dynamic response of a proton exchange membrane (PEM) FC. However, these models require high computational resources and they are not easy to interconnect with the usual electrical circuit simulation...
Based on the technology of field programmable gate array (FPGA), a realization of fuzzy control (FC) system with radial basis function neural network (RBF NN) tuning is presented to a permanent linear synchronous motor (PMLSM) drive in this paper. Firstly, a mathematic model of the PMLSM drive is defined; then to increase the performance of the PMLSM drive system, an FC constructed by a fuzzy basis...
The paper investigates the effect of current harmonics in oil-rig's thruster drives, which are based on variable frequency AC induction motor drives. The electrical system in the oil rig consists of two 12 pulse phase shifting transformers having a relative phase shift of 15??, a frequency converter and an induction motor. The electrical system exhibits clean energy characteristics according to IEEE...
This article is concerned about the analysis, design, and simulation of an electric power steering (EPS). The article begins by introducing the EPS system concept and comparing the technical and commercial benefits with existing technologies. Being more versatile than conventional hydraulic power steering, EPS systems excel in engine efficiency, space saving, and environmental friendly. The remainder...
Electric Power Steering (EPS) has important significance in improving the auto's dynamic and static performances. This paper deals with the mathematical model and characteristic curves of EPS System. First, the principle and structure of EPS are discussed. Then the characteristics of EPS system are analyzed, including the typical power curves which deal the relationship of the assist torque and the...
This research investigates the optimum solar panel installation angle for fixed solar panels to obtain the maximum annual energy collection at different latitudes using simulation equations. The simulated results were compared with the recorded data from the Weather Bureau for Taipei, Chiayi and Hungchun, respectively. The errors for daytime fair weather were all within 10%. Simulations were also...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.