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, a new current control approach applied in linear synchronous motor (LSM) drive system is proposed for traction-system. The proposed method is featured by adjusting the current proportions of paralleled converters in double-end supply. First, the theoretical model of LSM of double-end supply is established and the control strategy consists of an outer PI speed closed-loop, an inner current...
The fault detection of squirrel cage induction motors due to its importance in the industry has become a highly developed area of interest for researchers. Typically, the electrical machine is designed for stable operation with minimum noise and vibrations under normal conditions. When the fault emerges, some additional distortions appear. The necessity to detect the fault of an electrical motor in...
The canned solid-rotor induction motors with squirrel-cage (CSRIMSC) are widely used in petroleum, chemical and pharmaceutical fields. The equivalent circuit of the conventional induction motor is not suitable for CSRIMSC due to the special structure. In this paper, an analytical method of performance calculation for CSRIMSC is proposed. The effects of solid rotor and cans are considered. Besides,...
The brushless doubly fed machine (BDFM) is an alternative to the doubly fed induction generator, widely used in wind turbines, without use of brush gears and slip rings. Rotor design is important for designing an optimal multi-MW BDFM. To date, nested-loop rotors have been extensively used in various BDFMs but they may not be suitable for larger machines. In this paper, different methods of BDFM rotor...
The paper presents a comparative study among three methods which allow to estimate induction machines performance through finite element analysis. The first two approaches evaluate the performance by means of a non-linear circuital approach whose parameters are calculated by a specific set of finite element simulations. Those two strategies differ each other on the calculations performed for the circuital...
The article provides a method for the determination of electromagnetic parameters of asynchronous submersible electric motors (SEM) on the damping curve of the constant current recorded from a stationary rotor. The method is suitable for using both as in terms of electro-repair shops as directly on the surface of the multiple well platforms. The method has perspective of using in operation of SEM...
The paper presents a simplified reluctance equivalent circuit for a hybrid excited ECPMS-machine. This circuit allows determining an air-gap flux control and can be used to estimate the influence of a rotor central core flux barrier on the machine field-weakening capability. The presented equivalent circuit has been based largely on results obtained by predictions using 3D-FEA.
Dependence of stator current from slipping for induction motor powered by a pulsed voltage source was analyzed. Slipping dependence for higher harmonic components of induction motor from the fundamental and carrier signals frequency was considered. A method for calculating the stator current of the induction motor by a predetermined supply voltage was proposed.
Precise knowledge of machine inductances are essential in the design of controllers with adequate dynamic and steady-state performance, for concentrated-wound interior permanent magnet machines. These machines have a relatively low base speed; therefore, their high-speed operation in the field-weakening mode requires the stator windings to be excited above the rated frequency. The effect of the current...
The parameters of a permanent split-capacitor single-phase induction motor can be estimated by conducting the DC test, blocked rotor test and no-load test which later can be used to facilitate the prediction of motor torque-speed characteristics. To improve further its performance, an exact motor model is simulated and investigated in 2D finite element analysis under influence of different capacitor...
This paper reports the optimization process of a MW-size, medium voltage, squirrel cage induction motor for industrial applications. Starting from an existing construction, the aim of the optimization is to maximize the induction machine power density, while fulfilling high demanding, specific international Oil&Gas industry regulations. For every considered design, the motor performance is estimated...
In this paper, a simulation based modeling method of interior permanent magnet synchronous motor (IPMSM) is proposed to predict and analyze the electromagnetic interference (EMI) in a real vehicle system. In order to create an equivalent circuit, characteristics of IPMSM under vehicle drive system is introduced and extraction methods of dynamic and parasitic parameters are presented by using finite...
This paper describes a generalized method to develop steady state model (SSM) of different electric motors comprising electric equivalent circuit (EEC) and the torque equation. In most of the books on electric motors, EEC is used to explain operation and performance characteristics of motors, but the development of these EECs is not explained convincingly. This work overcomes this shortcoming by specifically...
The research on variable frequency system mainly focuses on the developing of system performance, while the negative effects of the system is ignored. The bearing currents issue is a typical negative effect. In this paper, a lumped common mode model of a variable frequency induction motor driven by PWM inverter is proposed and the formulas of the key parameters in the model are presented and impedance...
This paper presents an enhanced Permeance Network Model (PNM) for embedded permanent magnet synchronous machines. PNMs are characterized by very fast and accurate results. Furthermore, this approach overcomes some weaknesses associated to analytical models, such as the impossibility of accurately predicting the embedded magnet machines behavior or taking into account the nonlinear behavior of the...
A new type of electric machine with two free rotating rotors (Dual Mechanical Port) is investigated in this paper. Since this Dual Mechanical Port (DMP) machine has a Squirrel-Cage rotor, it is named as the SCDMP machine. First, the transient and steady state models of the SCDMP machine are derived based on its electromagnetic structure. Then, the equivalent circuits of the machine are proposed. The...
This paper proposes a Wound-Rotor Brushless Doubly Fed Induction Machine (WRBDFIM), an alternative Brushless Doubly Fed Induction Machine (BDFIM) concept for wind turbine applications. The WRBDFIM consists of two separate machine winding sets different in pole-numbers, whose rotor windings are connected together. Both of the winding sets are housed in the same machine frame. The separate winding set...
Computation of the transient behavior of wound-field synchronous generators typically focuses on the stator currents. Appropriate models to compute these currents have been derived. However, the calculation of the transient voltages and currents in the field winding of such machines-as for example required for the design of the components of a brushless exciter (diodes, resistance)-requires this model...
A non-conventional electric machine is investigated in this paper. Since this machine has two free rotating rotors (Dual Mechanical Port) and one of them is a Squirrel-Cage rotor, it is named as the SCDMP machine. Based on the steady state equivalent circuit of the SCDMP machine, the rotor flux reference equivalent circuits are derived. Then the control principle for the machine is proposed. Simulation...
This paper presents the analysis on the performance of outer rotor squirrel cage induction motor (ORSCSPIM) using Veinott theory. Previously the motor was designed based classical design theory. The calculated performance of the designed motor obtained from the classical theory, which are efficiency, power factors, input power, output power, and starting torque, are compared with performance analysis...
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.