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IEE Proceedings - Electric Power Applications

Issue 3 • Date May 1995

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Displaying Results 1 - 9 of 9
  • Analysis and simulation of the high-speed torque performance of brushless DC motor drives

    Publication Year: 1995, Page(s):191 - 200
    Cited by:  Papers (37)  |  Patents (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (576 KB)

    A simulation model for the performance prediction of brushless DC drives is used to investigate the high-speed torque performance for a motor switched by a PWM inverter. The solution is given for both 120° and 180° conduction angles of inverter operation, with provision for selecting the advance commutation angle. The influence of the more important drive parameters on high-speed performan... View full abstract»

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  • `Variable inertia test' for full load temperature rise testing of induction machines

    Publication Year: 1995, Page(s):222 - 224
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (176 KB)

    Full load temperature rise testing of induction machines can be carried out in various ways, including the `back to back test', the `phantom-loading test' and various forms of what is generally called the `mixed frequency test'. The paper proposes a new method of testing called the variable inertia test. The proposed test is purely mechanical in nature, it does not require any electrical connectio... View full abstract»

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  • Eddy current iron losses in axially laminated brushless motors

    Publication Year: 1995, Page(s):183 - 190
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (404 KB)

    The paper presents an analytical procedure for the evaluation of iron losses produced by eddy currents in the rotor sheets of axially laminated VR motors. These losses cannot be neglected especially in inverter fed closed loop operations. To simplify the eddy currents computation, the magnetic field in iron sheets is obtained by separately considering the contribution of the stator currents with r... View full abstract»

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  • Direct-phase modelling of isolated brushless exciter-alternator unit including the magnetic nonlinearities

    Publication Year: 1995, Page(s):206 - 214
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (520 KB)

    Detailed accurate models for brushless alternator units are important for practice and design engineers. The paper presents a state space mathematical model for a standalone unit based on a circuit model in the direct-phase reference frame. Also, a state space mathematical model for an automatic voltage regulator is integrated with the machine model. Due to the existence of the rotating bridge rec... View full abstract»

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  • Estimation of rotor position and speed of a synchronous reluctance motor for servodrives

    Publication Year: 1995, Page(s):201 - 205
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (280 KB)

    The main advantage of synchronous reluctance motors is their structural ruggedness. To retain this advantage in a drive system using such a motor, no position sensor should be used. Instead, it is advantageous to use a software estimator. An effective algorithm is proposed for position and speed estimation based on the motor terminal voltages and currents. In a VSI-fed drive system, the terminal v... View full abstract»

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  • Impact on the power system of single-phase input cycloconvertor motor drives

    Publication Year: 1995, Page(s):176 - 182
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (420 KB)

    The paper presents the external line side performance of new single-phase input cycloconvertor motor drives for household and similar applications. Both single-phase to two-phase and single-phase to three-phase versions of cycloconvertors, which operate using a double integral control technique, are considered. With this technique, the motor flux linkages follow sinusoidal references. For the moto... View full abstract»

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  • Induction coil guns for hypervelocities

    Publication Year: 1995, Page(s):215 - 221
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (544 KB)

    The tubular linear induction motor is seen as an alternative to railguns, whose maximum speed is limited by current collection problems. By reducing the task of determining the maximum speeds attainable by induction to first-order approximations, the author shows that the ultimate limitations are set by the physical properties of copper: specific heat, resistivity, density, melting point and yield... View full abstract»

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  • Performance of a single-phase to three-phase cycloconvertor drive

    Publication Year: 1995, Page(s):169 - 175
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (392 KB)

    The paper presents the performance of a three-phase induction motor driven by a new cycloconvertor consisting of six naturally commutated triacs and digital control circuits, which can generate a symmetrical variable voltage variable frequency (VVVF) three-phase supply from a single-phase mains. This inexpensive topology is particularly suitable for low power domestic and similar drives requiring ... View full abstract»

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  • LKF based robust control of electrical servodrives

    Publication Year: 1995, Page(s):161 - 168
    Cited by:  Papers (12)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (544 KB)

    The paper describes a new robust controller for the positioning of a servomotor. The position control system design is based on pole placement by the state feedback method with an additional feedforward compensation term. The state feedback controller gains are tuned on the nominal parameters of the motor and load. To obtain the specified ideal dynamic performance of the drive, the feedforward act... View full abstract»

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