In this paper, Switched Reluctance Motor (SRM) to be employed electric vehicle (EV) is designed using finite element method (FEM). The static torque of SRM is estimated with the magnetic field analysis. The temperature rise with time of SRM is estimated with the heat transfer analysis. First, the static torque and temperature rise with time of 600W SRM included in an experiment set, and are compared with the calculated results using FEM under the same conditions. The validity of magnetic field analysis and heat transfer analysis is verified by the comparisons. Also, the 60 [kW] SRM employed in EV, whose output characteristics are equal to 1500 [cc] gasoline engine, is designed with the magnetic field analysis and heat transfer analysis. 1-IntroductionThe problem depletion of the petroleum depletion, the serious environmental problem of global warming by C02 and air pollution by NOx are caused by the rapid development of the car society. As a solution for these problems, the following gradually spread: High mileage automobiles and low emissions vehicle such as in hybrid vehicle (HV). However, the penetration ratio of HV stagnates, and it is hard to be called a winning hit which solves the problem. This is because the price of HV is still higher than the price of gasoline-powered vehicle (GV) of equal power.Switched reluctance motor (SRM) rotates due to reluctance torque which originates from the change of the resistance of the magnetic circuit. The stator and rotor have salient pole structure, made from laminated nonoriented electrical steel. The concentrated winding coils are installed only in the stator. The SRM is known by its low cost. The structure is simpler than induction motor and synchronous motor. Since its rotor has winding coils or permanent magnets. Therefore, SRM has the possibility of standing high-speed rotations and operations at high temperatures under inferior road surface condition always recieving impacts and vibration, [1].The main problems present in the SRM are high torque pulsation and noise. However, those problems are being solved by development of the power electronics and improvement in the technology [2]. The improvement of basic performance for the SRM drive contributes to the extension of the application field, and the application of SRM to the electric vehicle (EV) begins to be examined recently. In the institutes, the following have already been done: Reports on the design of SRM for EV and reports on performance enhancement of the control method for SRM assuming the application to EV.Authors are tackling a project to employ a SRM in EV with power performance equivalent to a 1500 [cc] GV. In the project, a low cost SRM with solid features is chosen, and a design suitable for the dimensions and power of EV is done. The following goals as design guidelines are raised: Equivalent output characteristics with 1500cc gasoline engine, and making smaller and lighter. And, FF (the front engine front-wheel drive system) is adopted. Then, 2 SRMs of machines are used in order to omit the diff...
This paper present a new approach to the automatic control of the turn-off angle used to excite the Switched Reluctance Motor (SRM) for electric vehicle (EV). The controller selects the turn-off angle that supports the most speed operation of the motor drive system. This control consists of classical current control and speed control depends on lookup table to take best result of the motor. The turn-on angle of the main switches of inverter is fixed at 00 and the turn-off angle is variable depend on the reference speed. The motor, inverter and control system are modeling in Simulink to demonstrate the operation of the system. SRM is a motor using reluctance torque which originates from the change of the magnetic resistance in magnetic circuit. The stator and rotor have the salient pole structure, and they are made from the laminated non oriented electrical steel. The concentrated winding coils are installed only in the stator. SRM has solid features and features as a low cost since SRM has the structure which is very simpler than induction motor and synchronous motor. And, winding coils and permanent magnet are not used in the rotor. Therefore, SRM has the possibility of standing high-speed rotations and operations in high temperature state, and the operations under inferior road surface condition for always receiving the impacts and vibration, which are assumed in the application to electric vehicle (EV) [1,2].The problems that torque pulsation and noise were big in the initial development of SRM drive existed. However, those problems are being solved by development of the power electronics and improvement in the technology [3]. The improvement of basic performance for the SRM drive contributes to the extension of the application field, and the application of SRM to the electric vehicle (EV) begins to be examined recently.This paper presents an automatic turn-off angle (Ooff) control that supports Torque operation of the SRM over its entire speed region. This control is depending on the lookup table or equations between reference speed and motor current to select the best turn-off angle. This approach is an alternative to the classic control of speed and the self-tuning approach to optimization of excitation parameters [4]. This method is simulated for 0.6kW SRM of sample machine. 2-SRM Control A. Current ControlThe design of the controllers can be primarily considered when a single phase is conducting at a time. It may not be necessary to design for the periods of multi-phase conduction. Assuming that phase a is under consideration, the voltage equation with this converter is written as, [5, 6, 7] Vi = Rsi± + d (Laia)= Rsi± + La dt +ia dt dit adt adt = Rsi± + La da +ia dLa dO =Rsia + La di, + iLa (1) a dct d5O± atcdt ardO a(RS + CmgL)+ La dt Where the rate of change of inductance is constant and defining, gL = dLO The electromagnetic torque can be calculated as, 12 2 (2) Assuming that the load is proportional to the speed, at rated speed and rated load torque, Trat Bf = e 1 The total inertia of the machine c...
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.