Publication

Method for determining the position of a rotor of an electromagnetic motor with no commutator and device therefor (Procédé de détermination de la position du rotor d'un moteur électromagnétique sans collecteur et dispositif pour sa mise en oeuvre)

Yves Perriard
2000
Patents

Abstract

NOVELTY - After disconnection from normal control (3) a pulse generator (4) sends positive and negative pulses to a motor winding R. The response currents are measured (5) from voltages (Vpr,Vnr) which appear after a fixed time on a neutral resistor (2) and their difference is calculated. Similar differences are taken for the two other windings (S,T) and the three values are supplied to a calculator (6) which uses stored data to deduce the rotor position USE - To find the angular position of electromagnetic motor rotor without collector ADVANTAGE - The method is very accurate and does not require a large number of expensive sensors which introduce an element of unreliability DETAILED DESCRIPTION - INDEPENDENT CLAIMS are made for equipment used with the method DESCRIPTION OF DRAWING(S) - The drawing shows the pulse generator and means of measurement and calculation Neutral resistor (2) Normal control (3) Pulse generator (4) Measurement module (5) Calculator (6) Neutral resistor voltages (Vpr,Vnr) Motor windings (R,S,T)

Official source

https://infoscience.epfl.ch/entities/publication/d765fe04-0b87-4414-b193-f910e461776d

About this result

This page is automatically generated and may contain information that is not correct, complete, up-to-date, or relevant to your search query. The same applies to every other page on this website. Please make sure to verify the information with EPFL's official sources.

Graph Chat

Chat with Graph Search

Ask any question about EPFL courses, lectures, exercises, research, news, etc. or try the example questions below.

DISCLAIMER: The Graph Chatbot is not programmed to provide explicit or categorical answers to your questions. Rather, it transforms your questions into API requests that are distributed across the various IT services officially administered by EPFL. Its purpose is solely to collect and recommend relevant references to content that you can explore to help you answer your questions.

Yves Perriard
2000
Patents

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/d765fe04-0b87-4414-b193-f910e461776d

About this result

Related concepts (32)

Electric motor

An electric motor is an electrical machine that converts electrical energy into mechanical energy. Most electric motors operate through the interaction between the motor's magnetic field and electric current in a wire winding to generate force in the form of torque applied on the motor's shaft. An electric generator is mechanically identical to an electric motor, but operates with a reversed flow of power, converting mechanical energy into electrical energy.

DC motor

A DC motor is an electrical motor that uses direct current (DC) to produce mechanical force. The most common types rely on magnetic forces produced by currents in the coils. Nearly all types of DC motors have some internal mechanism, either electromechanical or electronic, to periodically change the direction of current in part of the motor. DC motors were the first form of motors widely used, as they could be powered from existing direct-current lighting power distribution systems.

Stepper motor

A stepper motor, also known as step motor or stepping motor, is a brushless DC electric motor that divides a full rotation into a number of equal steps. The motor's position can be commanded to move and hold at one of these steps without any position sensor for feedback (an open-loop controller), as long as the motor is correctly sized to the application in respect to torque and speed. Switched reluctance motors are very large stepping motors with a reduced pole count, and generally are closed-loop commutated.

Related publications (24)

Method for determining the position of a rotor of an electromagnetic motor with no commutator and device therefor (Procédé de détermination de la position du rotor d'un moteur électromagnétique sans collecteur et dispositif pour sa mise en oeuvre)

Chat with Graph Search

Study and optimisation of a linear drive system

Assessment of HVDC grid segmentation for reducing the risk of cascading outages and blackouts

A study of polarization effects in metal-ferroelectric-oxide-semiconductor capacitors