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Torque measurement methods for very high-speed motors

Publications associées (68)

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SWISSMETRO: Combined Propulsion with Levitation and Guidance

Christophe Espanet

Swissmetro is a MAGLEV Project between the main cities of Switzerland, designed for a speed up to 500 [km/h] in two tunnels under partial vacuum. Two propulsion variants are considered: - the short stators of the linear homopolar motors are fixed with the ...

2004

Steady state Kalman filtering for sensorless control of hybrid stepper motors

Yves Perriard, Jan Persson

Extended Kalman filtering techniques have been successfully used as sensorless control schemes on many different types of synchronous motors. One big disadvantage of the extended Kalman filtering technique is the large computational cost. Even with today's ...

IEEE2003

Performance analysis and optimization of the travelling wave ultrasonic motor

Yves Perriard, Matteo Bullo

We will present a method allowing to evaluate the mechanical performances (torque, speed, mechanical power, dissipated losses in the surface of contact between stator and rotor) of the travelling wave ultrasonic motors. The visualization of the motor chara ...

2002

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

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

Mixed signal simulation applied to modern adjustable speed drives.

Jean-Jacques Simond, Philippe Allenbach, Basile Kawkabani, Alain Sapin

The paper deals with the main problems to solve in order to simulate precisely the behavior of complex power systems with mixed elements (power components and digital regulation devices). A simulation tool developed at the Swiss Federal Institute of Techno ...

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

Poling of ferroelectric thin films

Paul Muralt

Poling of lead zirconate titanate pyroelectric thin films has been studied. Poling temperature and electrical field were optimized to achieve high figures of merit. We have found a direct correlation between the onset of degradation current and the final p ...

1999