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A New Passive Methodology for Reducing the Noise in Electrical Machines: Impact of Some Parameters on the Modal Analysis

Publications associées (32)

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A contribution to energy saving in induction motors

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

Reducing the cogging torque in brushless DC motors by using conformal mappings

Yves Perriard, Marcel Jufer, Miroslav Markovic

We present an exact model for determining the cogging torque in a brushless DC (BLDC) motor. It is based on the conformal mapping (CM) method, by which the motor configuration is transformed to a configuration where the magnetic field can be determined. Th ...

2004

Implementation of a lowcost sinusoidal supply for BLDC motor

Yves Perriard, Frédéric Bonvin

In many applications, industry has tried to develop sinusoidal supply for brushless DC (BLDC) motors. This paper describes a method that still keeps a simple 2 phases-on sensorless method and achieves sinusoidal supply, which is needed to avoid speed oscil ...

EPE Assoc2001

BLDC motor position detection at standstill

Yves Perriard, Frédéric Bonvin

In some applications, it is interesting to know the position of a BLDC Motor at standstill. This paper propose one solution using the saturation property of the motor. Principle, simulation and measures are presented. The results of industrial applications ...

EPE Assoc2001

Modélisation et réglage d'un entraînement à haute performance par un moteur réluctant

Michel Girardin

Usually, each phase of the direct reluctance motor is fed separately by its own inverter producing a squarewave phase current depending on the rotor position. In the present work, a star-connection of the three stator phases is used and the direct reluctan ...

EPFL2000

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

Pièce à main dentaire motorisée munie d'un accessoire électrique tel qu'un éclairage

Yves Perriard

The accessory e.g. lamp for illumination of the hand-held instrument (L) and the excitation coils (B1-B3) of the brushless motor (M) are all supplied with current through a rotary connector (F) from a control circuit (C1) within a fixed part of the machine ...

1999

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

Analyse et conception de moteurs synchrones chemisés à commutation électronique

The number of brushless DC (BLDC) motor applications has increased significantly, essentially due to reduced costs of semiconductors and permanent magnets, but also because of the emergence of new control strategies, such as closed-loop and sensorless cont ...

EPFL1998

Torque control of the three-phase direct reluctance motor

Michel Girardin

This paper describes an open-loop torque control for a three-phase direct reluctance motor which can generate high torque at low speed. The command strategy presente in this paper consists of feeding the motor with three-phase sinewave currents. The torque ...

1997