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Optimal Design and Sensorless Position Control of a Piezoelectric Motor Integrated into a Mechatronic Cylinder Lock

Publications associées (141)

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Lost step detection on a stepper motor

Sébastien Huberti

This project was carried out at Overview Ltd., a London company which specialises in high precision video-surveillance equipment. Overview produces devices that include a camera driven by two stepper motors, and an image-processing unit. Magnetic encoders ...

2007

A Haptic Knob with a Hybrid Ultrasonic Motor and Powder Clutch Actuator

Hannes Bleuler, Dominique Chapuis, Etienne Burdet, Xavier Michel

In haptics, the forces to be displayed vary widely in terms of magnitude and bandwidth. A single actuator can hardly comply with these requirements. It has thus been proposed to combine electrical motors and passive devices in a hybrid actuator to cover a ...

2007

SwissCube Inertia Wheel Assembly - Electronics

Omar Scaglione

The Inertia Wheel Assembly (IWA) is composed by the IWA motor, the inertia wheel and the command electronics. IWA belongs to the Attitude Determination and Control System (ADCS) of the SwissCube satellite. Swisscube is a pico-satellite that complies with C ...

2007

Comparative study and selection criteria of linear motors

Samuel Chevailler

Initially, linear motors have been particularly dedicated to transportation systems. Nowadays, linear motors are meant to replace a system using a rotating motor and a transmission to realize a linear movement. With linear motors the performances increase ...

EPFL2006

Brushless DC motor optimization process - Choice between standard or straight tooth shape

Yves Perriard, Patrick Ragot, Miroslav Markovic

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

High-Speed Low Power Radial Turbocompressor For Oil-Free Heatpumps

Daniel Favrat, Jürg Alexander Schiffmann

The presence of oil in domestic heat pumps is a hindrance, particularly for enhanced surface evaporators and for advanced concepts based on two-stage cycles. Very compact oil-free dynamic compressor directly driven by high speed electric motors and support ...

2006

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

Modeling and optimization of ultrasonic linear motors

José Fernandez Lopez

Ultrasonic motors have received much attention these last years, in particular with regard to their modeling and their design principle. Their operating principle is based on piezoelectric ceramics that convert electrical energy into mechanical energy in t ...

EPFL2006

Simplified Design Methodology for a Slotless Brushless DC Motor

Yves Perriard, Miroslav Markovic

The paper presents a simplified analytical method to design a small two-pole slotless brushless dc motor. Using only a few approximations, the motor analytical model is formulated to generate a system of equations. The system can be solved analytically, pr ...

2006

Analytical modeling of the flux density in permanent magnet motors

Yves Perriard

This paper presents an analytical model for the calculation of the flux density in PM synchronous motors. Parallel and radial magnetization of surface-mounted magnets and finite permeability of the iron are taken into account. © 2006 IEEE. ...

2006