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Efficiency Optimisation of Slotless Magnetic Bearing Machines

Related publications (35)

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Optimization of the Motors for the Control of the CVT Servo-Pumps

The aim of this project is the design and the optimization of the electrical motors used in the Continuously Variable Transmission (CVT) system currently under development at JTEKT, an automotive part supplier company. Two motors are needed for the control ...

2006

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In order to create a new solar aircraft totally powered by the sun, a new method able to handle such a complex system must be developed. The project aim is to make a round-the-world flight in so as to promote the sustainable development. The aircraft power ...

2006

Optimization of Electric Motor for a Solar Airplane Application

Yves Perriard, Patrick Ragot, Miroslav Markovic

This paper presents a method to model and optimize brushless dc motor for a solar airplane. In order to obtain the optimal solution for the given specifications, all free parameters are analyzed globally in one go. For this, the commercial optimization sof ...

2006

Analysis of hysteresis losses in synchronous permanent magnet motors

Yves Perriard, Miroslav Markovic, Pierre-Daniel Pfister

The paper presents a method to determine hysteresis losses in synchronous permanent magnet (PM) motors. The method comprises four steps: (1) experimental determination of the B-H loop, (2) analytical modeling of the B-H loop by applying different models, ( ...

2006

Electric motors consume over half of the electrical energy produced by power stations, almost the three-quarters of the electrical consumption in industry and almost the half of commercial electrical consumption in developed countries. Motors are by far th ...

EPFL2005

Theoretical Design of a High-Speed Low Power Radial Turbocompressor

Daniel Favrat, Jürg Alexander Schiffmann

High-speed bearings and electrical motors are gradually getting available. This is of particular interest for the application of thermal turbomachinery. The availability of high speed bearing and motor components opens the way to new applications for low p ...

2005

Determination of tooth cogging force in a hard-disk brushless DC motor

Yves Perriard, Marcel Jufer, Miroslav Markovic

The paper proposes a new method to determine the tooth cogging force in a brushless DC (BLDC) motor which is used in a hard-disk application. This force might be a source of tooth vibrations and motor noise. In the new method, the permanent-magnet (PM) pol ...

2005

Modification of brushless DC motor back-EMF shape-application to noise reduction

Yves Perriard

The brushless DC motors are normally built with rotor mounted PMs, which create the necessary back EMF voltage to produce a mechanical power. The shape of this back-EMF voltage is very important compared to the phase voltage supply one. Indeed, the electro ...

Helsinki Univ. Technol2000

BLDC motor control in multiple dq axes

Yves Perriard, Frédéric Bonvin

With brushless DC Motor (BLDC), current regulators in dq axes are very appreciated for sinusoidal supply. As the set current is constant, the regulator works properly. When the back-EMF is not sinusoidal, current oscillations appear in the dq regulator. A ...

Institution of Electrical Engineers2000

Low cost sensorless position detection for brushless DC motor

Yves Perriard, Frédéric Bonvin

This paper describes a low cost sensorless position detection scheme for a brushless DC motor. This method is based on interruption of the 3 phase-currents and reading the back-EMF. The hardware for measuring the back-EMF is very simple. The method is poss ...

EPE Assoc1999