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Dual motor drives designs are attractive for high power application because of their mechanical simplicity, traction and regenerative braking control on low friction surfaces. However, such configurations normally require two power inverters with coordinated control. The high cost and large size of packaging needs of the inverters make such dual inverter, dual motor drive configurations economically...
The saving energy with train operation is more important than before from the view points of the global environment. However the energy saving design on the traction equipments sometimes has a trade off relation against the down sized and lighter weight traction equipments. In this paper, an optimizing method of the generic algorithm is applied to the numerical simulation to calculate the consuming...
This paper deals with the multiobjective optimal design of a voltage supply inverter (VSI) fed in-wheel motor for urban electric vehicles (EVs) using genetic algorithms (GAs). The proposed motor is an axial flux permanent magnet (AFPM) synchronous sine-wave motor. This type of motor can be directly integrated into the wheel without mechanical transmission and differential gears. The design problem...
This paper proposes a solution for the optimization of a full-bridge three-phase inverter-fed switched reluctance motor (SRM) simultaneously accounting for the geometry of the motor as well as for its switching strategy. The optimization method proposed for this is Particle Swarm Optimization (PSO), allowing a multi-objective optimization. By means of the Permeance Network Analysis (PNA), magnetic...
This text aims to solve such problems as the large pulsation of battery electric locomotive traction motor torque at low speed, the unpredictable frequency spectrum of the torque, and the large frequency and wastage of high-speed inverter switching. Starting from space voltage vector, this text adopts the method of multiple vector synthesis and mutual switch control of motor air-gap flux according...
The direct-flux field oriented control of Interior Permanent Magnet motor drives is evaluated, with particular attention to very high speed operation in the maximum torque per voltage region. A new control technique is proposed to overcome the stability problem of direct flux control based on flux and quadrature current control. The proposed control is easy to be implemented, it is independent of...
In this paper, a slip and slide simulator is proposed to simulate the dynamic behavior of the electric locomotive. The simulator consists of two inverter-controlled AC motors directly coupled with each other. One motor plays a role of traction motor of electric locomotive, other one is to use to simulate various driving characteristics of railway vehicle including adhesive characteristics, running...
The implementation of a neighborhood electric vehicle with two independent wheel drives is presented. An electronic differential control is carry out by using two independent field-oriented controlled induction motors. Industrial standard induction motors were rewound to operate with low voltage (28 Vrms), while maintaining the original motor power. Two three-phase MOSFET inverters were built for...
The paper deals with controlled PM-brushless drives in configuration ldquosingle-inverter, dual-motorrdquo operating with unbalanced loads at the shafts of the two motors. Some control techniques are analyzed and their relevant features are compared. Starting from some simple control circuits which refer to an equivalent ldquosingle-inverter, single-motorrdquo configuration, some compensation blocks...
The paper focuses on the behavior of the rotor flux indirect control system for an inverter fed AC tram drive. The control strategy used in this drive is based on the original state stimulator concept and has been applied in several modernized trams and in a trolley-bus in Poland. In these vehicles some oscillations of the modulus of the rotor flux vector during sudden braking operation were observed...
The objective of this paper is to propose three parallel connected motor drive systems, employing a three-phase permanent-magnet machine and a single-phase induction machine. The configurations have been designed for applications where it is necessary to control two motors independently, by using a standard three-leg inverter. All proposed solutions employ standard three-leg converters, which represents...
An outstanding feature of electric motors with permanent magnets is their high efficiency. It is highest among all the motors used in electric drive applications. Permanent magnet synchronous motors (PMSM) dedicated for use in electric traction drives or in automotive vehicles should be additionally characterized by a high maximal to nominal torque coefficient and by a wide range of speed control...
In this paper, a complete close-loop speed sensorless dual-motor drive system was designed based on the dynamic model and an adaptive observer which is based on MRAC was applied to each induction motor, in which stator fluxes, rotor fluxes and motor speeds were estimated. The validity and effectiveness of this proposed method were confirmed through different balanced and unbalanced load tests of simulations
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