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This paper presents novel of power system stabilizer in which intend to investigate and observe the oscillation due to disturbances then define power angle difference on South Sulawesi grid. The symmetrical three phase fault and single phase fault to ground have been implemented and results show that the 150 kV of South Sulawesi grid tend to reach the limit of transient stability and then subject...
This paper presents the design and implementation of a robust drive train torque control for rotor inertia emulation in a dynamometer test bench application. The controller is part of a hardware-in-the-loop (HiL) framework for a 50 kW small test rig that enables a real-time interaction between test rig drive train and a rotor model. The control objective is to compensate undesired dynamics of the...
This paper investigates the use of the Taguchi method based regression rate optimization method for the design of line-start permanent magnet motors. A weighted factor multi-objective (MO) technique is used to take into account both steady-state and transient performance objectives. To validate the proposed method a prototype machine has been designed, constructed and experimentally evaluated. It...
This paper proposes a distributed speed control with improved power sharing capability for multi-three phase synchronous machines. This control technique allows the speed to be precisely regulated during power sharing transients among different drives. The proposed regulator is able to control the time constant of the current within the dq0 reference frame to a step input variation. If compared to...
Acquisition of practical skill in control systems development for nonlinear dynamic objects provides an opportunity to significantly improve training level of specialists in the field of controlling in technical systems. In this paper model of laboratory rig for development, investigating and debugging of position-control system of spherical object on a plane is presented. Mathematical representation...
The paper presents a comparative analysis of a three-phase induction motor that operates connected to the industrial supply system and separately to a six-phase supply source, as well. The design of the electric machine is made in such a way to fit for both situations. The six-phase supply, which is composed of two distinct three-phase systems, was configured for two cases: 30° and 60° phase shifting...
Direct torque control using space vector modulation (DTC-SVM) is one of the most popular control methods of induction motor for electric vehicle (eV). This paper proposes DTC-SVM with improved deadbeat control. During uphill and downhill, instant torque changes is problem for drivers. The principle of the developed method is a solution to overcome the torque need on unexpected road conditions. In...
Machine Parameters under the two rotor structures of regular and Halbach are compared; Air gap magnetic flux density of Halbach structure under different pole arc coefficient is analyzed, and the waveform is decomposed by making use of Fourier algorithm; assembly method of Halbach structure rotor is proposed; and the rationality of Halbach structure is verified by comparing the simulation results...
There is the high surge current emerging when the asynchronous traction motor is replaced by PMSM with power down-rejoining on. The high back EMF voltage exists when traction PMSM is passing the switching phase insulator. The reason is due to the constant value existence of the permanent magnet. Aiming at above mentioned problems, this paper analyses the reasons of causing transient surge current...
The ANSI/NEMA C50.41 Standard, “Polyphase Induction Motors for Power Generating Stations” states, “Induction motors are inherently capable of developing transient current and torque considerably in excess of rated current and torque when exposed to out-of-phase bus transfer.” Further, “The magnitude of this transient current and torque may range from 2 to 20 times rated.” This suggests a criterion...
This paper presents a control strategy for squirrel cage induction generator (SCIG) based on commercial vehicle using engine-generator system. For this, the conventional slip- and vector control method using PSIM is used to illustrate the characteristics of the system. The simulation results show that the deviation of DC link voltage from its reference value during the mentioned transient conditions...
This paper investigates the dynamic characteristics of a coaxial magnetic gear (CMG) system by using the analytical model of the CMG, which provides a quick and accurate method to predict the dynamic performance of the CMG. The dynamic characteristics under different conditions such as start-up and the abrupt load changes are studied. Moreover, the dynamic pull-out torque which may cause loss of synchronism...
This paper describes the causes of cogging torque in Permanent Magnet synchronous Motor. Establishes a motor model by ANSOFT software, uses Finite Element Method to quantitative analysis and comparative peak cogging torque and torque with notches at different locations, and different number of auxiliary slot. The conclusion is that notch reasonable can reduce the cogging torque of permanent magnet...
The engine start-stop technology has been widely concerned in the field of hybrid electric vehicles (HEV) for improving the fuel economy and alleviating environment pollution. In this paper, the model predictive control (MPC) is applied to deal with the control problem of engine start-stop with input constraint. Firstly, a nonlinear engine-BSA (belted starter alternator) coupling model is introduced...
This paper deals with the optimal fault-tolerant operation of a 5-phase permanent magnet (PM) brushless DC (BLDC) drive. In particular, the companion paper (Part I) proposes the optimization of the current supply to obtain the maximum power in healthy conditions and its analytical solution. In the present paper (Part II), by constraining the proposed model with healthy and fault specific conditions,...
PAM (Pole Amplitude Modulation) motor is a single-winding two speed motor, used for ID fans. Its cost is much less than that of a ASD motor. This paper is prompted by a rigorous study that was undertaken to replace an existing, oil filled, leaky, transfer switch type two speed motor starter, with an adjunct of tens of hard wired timers in a utility installation. The paper describes the fundamental...
It is analyzed the transient regime, electric, magnetic and mechanic, when starting a dc electrical machine supplied by half - commanded rectification bridge. The time variation of the current, as well as, the time variation of the roll, when the entire electromechanical chain is starting, is established by computer modelization.
The purpose of this paper is to present an innovating energy management strategy which takes advantage of the hybridization to reduce pollutant emissions. This strategy allows to reduce both NOx emissions and fuel consumption even with a small hybridization level, such as a 48 V mild hybrid. To do so it offers a contribution to the state-of-the-art by taking into account transient NOx emissions. This...
The paper deals with a field-circuit transient analysis of a squirrel cage induction motor taking into account a inter-turn short circuit. Numerical simulations were carried out for a selected number of shorted turns. The elaborated model consists of field, circuit and motion equations. Based on the models, torque waveforms have been charted. Torque waveforms have been designated for two states of...
During the start of a powerful induction motor drive reactor the switchover time to the net is the only controlled parameter. At switchover to the net in the end of the starting condition heat losses in the motor increase whereas during early switchovers significant impact electromagnetic torques can occur. Justified choice of the switchover time requires a detailed analysis of electromagnetic processes...
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