IEE Colloquium on Variable Speed Drives and Motion Control

4-4 Nov. 1992

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Displaying Results 1 - 14 of 14
  • IEE Colloquium on 'Variable Speed Drives and Motion Control' (Digest No.194)

    Publication Year: 1992
    IEEE is not the copyright holder of this material | PDF file iconPDF (16 KB)
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  • Computer aided design of induction motor drives

    Publication Year: 1992, Page(s):1/1 - 1/3
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (150 KB)

    A typical drive system comprises a motor, an inverter and a controller. To limit costs it is necessary to reach a compromise between the performance of each component. By modelling the entire drive system on a computer, the 'best' compromise can be established. To do this requires an easy and meaningful measure of drive performance. One useful approach is to consider the drive as a torque actuator... View full abstract»

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  • Improvements in the implementation of field oriented control (EMF-orientation to replace field-orientation)

    Publication Year: 1992, Page(s):2/1 - 2/3
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (243 KB)

    The author briefly discusses the development of field oriented control for motors. The author then discusses the concept and its advantages and disadvantages. The use of EMF orientation instead of field orientation is also discussed. The latest trends and future possibilities of the method are discussed briefly.<<ETX>> View full abstract»

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  • Estimator/regulator performance at slow speeds (motors)

    Publication Year: 1992, Page(s):3/1 - 3/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (202 KB)

    The design of a motor controller which uses a digital shaft encoder but does not directly measure the velocity is discussed. The controller incorporates estimates of the position, velocity, and load torque, using a steady-state Kalman filter. The load torque estimate is directly fed back to compensate for the load, eliminating the need for integral control, while removing steady-state errors. The ... View full abstract»

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  • Solving a nonlinear and incomplete equation system for a programmed PWM: application to electric traction

    Publication Year: 1992, Page(s):5/1 - 5/5
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (247 KB)

    Series or parallel connected rectifiers are frequently used in electric traction. It is known that programmed PWM can give very good results in the control of one rectifier. The authors study the characteristics of a programmed PWM suitable for parallel connected rectifiers. The authors show the special way in which the unknown switching instants appear in the equations and the subsequent computin... View full abstract»

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  • Digital drive for home appliances DC motor

    Publication Year: 1992, Page(s):6/1 - 6/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (212 KB)

    The authors show that a low end micro-controller can directly control a chopper driven brush DC motor in addition to interface functions. In the example given the adjustable speed drive is made with a 300 W-12000 RPM permanent magnet DC motor for food processor application.<<ETX>> View full abstract»

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  • DSP-based thermal protection for brushless servo motor

    Publication Year: 1992, Page(s):7/1 - 7/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (225 KB)

    The uses of PM brushless servo motors in robotic and other industrial applications has greatly increased, and these can be quite expensive, particularly if they are oversized against thermal overload. A thermal protection controller is presented which allows for a reduced safety factor. The controller can predict the thermal behaviour and protect against overheating, but allows continuous operatio... View full abstract»

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  • Sensorless commutation techniques for brushless permanent-magnet and reluctance motor drives

    Publication Year: 1992, Page(s):8/1 - 8/6
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (559 KB)

    Rotor position detection is essential for phase commutation in brushless permanent-magnet and reluctance motor drives when they are operating as closed loop servo motors. Traditional methods to obtain the rotor position are based on optical, inductive or Hall effect sensors. These are expensive to install and can be unreliable. Researchers have investigated various sensorless position detection te... View full abstract»

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  • Design ideas for low-inertia high-speed electronically commutated PM motors for special applications

    Publication Year: 1992, Page(s):9/1 - 9/5
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (273 KB)

    Technological advances in the design and production methods of power electronic devices and permanent magnet materials have made it possible for new type of electronically commutated permanent magnet motors to develop quickly. These are becoming more and more suitable for a variety of applications. The author discusses the basic magnetic properties of permanent magnets that make them suitable for ... View full abstract»

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  • Speed drive of a synchronous motor via sliding modes control

    Publication Year: 1992, Page(s):10/1 - 10/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (202 KB)

    In comparison with a synchronous motor, a DC motor has the disadvantage that the energy loss essentially occurs at the rotor. The authors survey various schemes which are proposed in the frame of sliding mode control techniques and attempt to improve the previous control schemes with regard to the robustness properties, with respect to the rotor flux. The model of the brushless DC motor considered... View full abstract»

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  • Fault diagnostic and remedial strategies for the brushless DC motor

    Publication Year: 1992, Page(s):11/1 - 11/5
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (212 KB)

    The philosophy behind fault diagnostic and remedial strategies for the brushless DC motor is described. The requirement of a simulator to assist in this study is explained. Key aspects of system design are illustrated using an example.<<ETX>> View full abstract»

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  • The operating characteristics and basis of control of a variable-speed induction-motor drive with load-commutated inverter

    Publication Year: 1992, Page(s):12/1 - 12/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (170 KB)

    The authors present an operating chart for the drive which shows the electrical conditions over the full range of operation expressed in terms of speed and torque and describe the control of the drive in the light of the chart and governing equations. Operation over the full range of speed involves both natural and forced commutation of the inverter. Natural commutation can only be used when the l... View full abstract»

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  • High power resonant inverters for motor drive applications

    Publication Year: 1992, Page(s):13/1 - 13/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (238 KB)

    ERA has designed and built resonant link inverters at 10 kVA and 50 kVA. These have been evaluated for use with induction motor drives. The results suggest that the main benefits of resonant power conversion are at higher powers (50 kW and above), where the increase in switching frequency is most significant. The authors discuss the experimental procedure, motor voltage and current waveforms, syst... View full abstract»

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  • Reducing the semiconductor losses in a matrix converter

    Publication Year: 1992, Page(s):14/1 - 14/5
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (215 KB)

    The authors look at the implementation of a matrix converter switching strategy under microprocessor control and using IGBTs. The effects of different switching methodologies for the converter are investigated. The power losses in the switching devices of a matrix converter are analysed and quantified. The effects of different switching frequencies and approaches to PWM generation are considered. ... View full abstract»

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