# Francois Malrait, Jouy Sur Eure FR

## Francois Malrait, Jouy Sur Eure FR

Patent application number | Description | Published |
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20080294360 | METHOD FOR DETECTING THE LOSS OF ONE OR MORE PHASES IN A PERMANENT-MAGNET SYNCHRONOUS ELECTRIC MOTOR - The present invention relates to a method implemented in a speed controller ( | 11-27-2008 |

20100264861 | METHOD FOR DETERMINING THE POSITION OF THE FLUX VECTOR OF A MOTOR - The invention relates to a method for determining the position of a rotor flux vector of an electric motor (M), comprising a step of injecting a first current vector into a first reference frame (x | 10-21-2010 |

20110101900 | METHOD FOR DETERMINING THE INDUCTANCES OF A PERMANENT MAGNET SYNCHRONOUS MACHINE - The invention relates to a control method implemented in a variable speed drive for determining the inductances (Ld, Lq) of a permanent magnet synchronous machine comprising three phases (a, b, c), each oriented along a direction, a stator, and a rotor. For each phase, one after the other, said method includes steps of: applying, along the direction of the phase (a, b, c), a voltage vector (V | 05-05-2011 |

20110166697 | METHOD AND DEVICE FOR CONTROLLING A LIFTING LOAD - A control method implemented in a variable speed drive for controlling a lifting load, the load control being carried out according to a first control profile that includes the following: accelerating the load with a view to reaching a first speed, decelerating the load upon receiving a deceleration order, and stopping the load. When the load receives a deceleration order when it is at a current speed lower than the first speed, the method determines a second speed lower than the first speed and higher than the current speed, the second speed having an optimal value for minimizing the load running time until stopping. | 07-07-2011 |

20110249479 | METHOD OF CONTROLLING AN INVERTER OF NPC TYPE - The invention relates to a method of controlling a multilevel inverter of NPC (Neutral Point Clamped) type. The method consists in particular in regulating the electrical potential of the mid-point when the inverter operates at full voltage, that is to say in overmodulation. In this case, the method firstly consists in determining the position of the control voltage vector (U) in one of the six identical triangles covering the hexagonal vector space and thereafter in decomposing the control voltage vector (U) in the triangle by taking account of the control combinations, defined in this triangle, for the switching arms. | 10-13-2011 |

20130015787 | METHOD FOR HOT CONNECTING A MOTOR TO A VARIABLE SPEED DRIVEAANM DEVOS; ThomasAACI Carrieres sous PoissyAACO FRAAGP DEVOS; Thomas Carrieres sous Poissy FRAANM MALRAIT; FrancoisAACI Jouy sur EureAACO FRAAGP MALRAIT; Francois Jouy sur Eure FR - A method for connecting a second motor to a variable speed drive in parallel with at least one existing motor under load and controlled by the variable speed drive is provided. The method disconnects the existing motor from the variable speed drive and a state estimator calculates transient state of the existing motor including at least the speed of the existing motor based on a previously established load model. The method then connects the second motor to the variable speed drive and the second motor is operated using a suitable directive until the actual state of the second motor attains the calculated transient state of the existing motor at a given time. Upon attaining the calculated transient state, the existing motor is reconnected to the variable speed drive such that no current spike is generated in the aforementioned process. | 01-17-2013 |

20130015790 | METHOD OF CONTROL IMPLEMENTED IN A VARIABLE SPEED DRIVE FOR CONTROLLING THE DECELERATION OF AN ELECTRIC MOTOR IN THE CASE OF POWER OUTAGEAANM KERMARREC; LudovicAACI EvreuxAACO FRAAGP KERMARREC; Ludovic Evreux FRAANM MALRAIT; FrancoisAACI Jouy sur EureAACO FRAAGP MALRAIT; Francois Jouy sur Eure FR - The invention relates to a method of control implemented in a variable speed drive for controlling the deceleration of an electric motor (M) in the case of electrical power outage. The method of control comprises: | 01-17-2013 |

20130287596 | METHOD AND SYSTEM FOR IDENTIFYING AND CONTROLLING A CENTRIFUGAL PUMP - The invention relates to a method and a system for controlling a centrifugal pump ( | 10-31-2013 |

20130334992 | CONTROL METHOD IMPLEMENTED IN A POWER CONVERTER AND INTENDED FOR IDENTIFYING PARAMETERS LINKED TO THE MAGNETIC SATURATION OF AN ELECTRIC MOTOR - A control method implemented in a power converter including an inverter connected to a synchronous electric motor including permanent magnets, the electric motor being modeled in the power converter by a mathematical model of currents in the electric motor expressing a flux current and a torque current on the basis of magnetic-saturation parameters. The control method identifies magnetic-saturation parameters during a learning procedure including applying a static voltage signal and a high-frequency voltage signal along an axis of the flux and/or an axis of the torque of the motor to cause an oscillation of the current on the axis of the flux and/or on the axis of the torque. | 12-19-2013 |

20140233287 | CONTROL METHOD AND SYSTEM FOR CORRECTING THE VOLTAGES TO BE APPLIED TO AN ELECTRICAL LOAD - A control method to be implemented in a power converter, the power converter including an inverter module controlled by a control rule that makes it possible to determine a control voltage to be applied to an electrical load on the basis of a reference control voltage. The control method includes determining a correction value to be applied to the reference control voltage, the correction value being determined from a first filtered voltage obtained by filtering a voltage that is representative of the real measured voltage, and a second filtered voltage obtained by filtering a voltage that is representative of the reference control voltage. | 08-21-2014 |