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An Actuated Transfemoral Prosthesis with Optimized Polycentric Knee Joint

Related publications (32)

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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

An Optimized Extended Kalman Filter Algorithm for Hybrid Stepper Motors

Yves Perriard, Jan Persson

In this article a high performance Extended Kalman filter algorithm is used to estimate rotor speed, rotor position and load torque in a Hybrid Stepper Motor (HSM). Together with a PI speed controller, the Kalman filter forms a very robust sensorless close ...

2003

Brushless motor design with global parametric optimization - application to an artificial blood pump

Yves Perriard

Designing transducers or motors, requires the analysis of a lot of parameters such as length, temperature, efficiency, weight, etc. The solution to obtain the optimum results for given specifications is to analyze globally all the free parameters in one go ...

Institute of Mechatronics and Information Systems2002

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

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

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

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

NOVELTY - For control mono-phase or multiphase machines in motor or generating mode with or without pulse width modulation. USE - Control of electrical rotating machines. ADVANTAGE - Can be used for control of single phase and three phase machines. DETAILE ...

1997

This paper presents a simulator of the manufacturing process of induction motors. Its main purpose is to provide feedback in the form of motor cost and production scheduling during the process of motor design. The paper concentrates on modeling and simulat ...

Institute of Electrical and Electronics Engineers1994

Electrically powered automotive vehicle with an energy recovering apppartus

Tristan Chevroulet

Electrically driven motor vehicle, comprising mechanical means for braking the driving wheel and at least one electric motor. System for transfering brake energy into air-conditioning device. Enhances electro brake capabilities, provides controlled dissipa ...

1994