Safran Electrical & Power

Technofan

Wenceslas Bourse

Pascal Rollin

Guillaume Boulet

Pascal Jacques Frédéric Guy Toutain

Regis Bernard Albert Meuret

Pascal Jacques Frederic Guy Toutain

Samuel Bonnard

Jacques Vincent

David Baltaro

The invention relates to a method for controlling a three-phase inverter () using a 120&#xb0; control arrangement associated with a PWM-type control, the inverter () being driven by a controller and configured to power a permanent-magnet synchronous motor () of a device on board an aircraft. The motor () comprises a stator and a rotor that can be rotated relative to the stator when the motor () is powered. The inverter () comprises three branches (), each branch comprising two switches (and) associated with a motor winding sing a 120&#xb0; control arrangement of a three-phase inverter. The method is characterised in that when one switch on one branch is controlled such as to switch front the on-state to the off-state, the other switch on said branch is controlled such as to be in the on-state for a sufficient amount of time to allow the magnetic discharge of the motor winding associated with said branch.

Method for controlling an inverter

A method for starting a permanent magnet synchronous electric motor comprising a rotor and a stator comprising coils connected respectively to a plurality of phases and a conversion circuit connecting the plurality of phases to a power supply source in order to control the rotation of the rotor of the synchronous motor, the conversion circuit comprising a converter supplying power to a DC-AC converter comprising a plurality of controllable transistors for controlling the rotation of the rotor according to a plurality of successive control phases, the method comprising: &#x2218; a step of controlling the transistors of the DC-AC converter according to a control table associating each control phase with a configuration of the transistors so as to determine an acceleration ramp of the rotor of the motor, &#x2218; a step of determining an electrical angle A based on a predetermined acceleration ACC, and &#x2218; a step of determining a control phase change signal Q if the electrical angle A is greater than a predetermined threshold angle A.

Method for starting a permanent magnet synchronous electric motor

A method for controlling an inverter configured to power electrically a motor including a stator and a rotor capable of being rotated relative to the stator when the motor is electrically powered, the inverter including a plurality of switches suitable for being controlled to open/close in order to regulate the power supply of the motor, each switch having a predetermined transition time from a closed state to an open state, and a predetermined transition time from the open state to the closed state, wherein the method includes the step of not generating the command to open and close the switches when this violates the predetermined transition times from a closed state to an open state, and the predetermined transition times from the open state to the closed state.

A DC/AC electrical power converter device having inlet terminals for electrically connecting to a DC electricity power supply network, outlet terminals for electrically connecting to an electric motor, a chopper electrical converter coupled to the inlet terminals, and an electrical inverter coupled between the chopper electrical converter and the outlet terminals. The converter device further includes a control unit for controlling the electrical inverter and that is configured to operate using pre-calculated pulse width modulation with pre-calculated unchanging switching instants for the controlled switches of the electrical inverter regardless of the frequency of rotation of the motor and of the voltage of the electricity network for connection to the device.

DC/AC electrical power converter device for a variable-speed motor and a high-speed motor

A permanent magnet synchronous machine includes a permanent magnet rotor and a three-phase stator, the machine being associated with a control inverter for controlling the stator of the machine. A method of controlling the machine includes taking three simultaneous measurements by three respective Hall effect sensors arranged to have a central sensor and two lateral sensors, the two lateral sensors being placed at 120&#xb0;/p mechanical relative to the central sensor about the rotation axis of the rotor, where p is the number of pairs of poles of the machine; determining the position of the rotor based on the three measurements; controlling the control inverter as a function of the determined position of the rotor; and prior to controlling the inverter, applying a time delay to the three measurement signals so that the control of the control inverter takes account of a variable desired lag angle.

Method for controlling a synchronous machine with permanent magnets and corresponding device

A cooling assembly () includes a conduit () including a side wall () and a fan () that includes a rotating electric machine (), a power supply module () including three distinct single-phase self-transformers (,,), each single-phase self-transformer being magnetically decoupled from one another, each single-phase self-transformer (,,) surrounding the side wall () of the conduit.

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Beauzelle, France

Wenceslas Bourse