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公开(公告)号：EP4191866A1
公开(公告)日：2023-06-07
申请号：EP21306703.6
申请日：2021-12-03
IPC分类号： H02P1/04 , H02P1/24 , H02P1/46 , H02P25/022 , H02P25/024 , H02P25/03 , H02P27/04 , H02P27/16
摘要： A method of setting up an electrical motor speed control in a fluidic system (1) comprising a turbomachine (9), an electric motor (11) having a number p of pole pairs rotating the turbomachine, a variable speed drive (13) controlling the speed of the electric motor (11), a sensor (S1, S2) measuring a parameter H, Q of the turbomachine (9), and a system controller (15) receiving the sensor's measurements and controlling the operation of the fluidic system (1), wherein the method includes the steps of driving the electric motor (11) at a predetermined electrical frequency, Fe, such that the turbomachine rotates with a controlled rotational speed N, determining the point of intersection of the system curve of the fluidic system (1) and of the performance curve of the turbomachine to obtain the turbomachine's nominal operating point, and thus the nominal value, Hn, Qn, of the turbomachine parameter, measuring, with the sensor (S1, S2), the current value, H, Q of the turbomachine parameter, calculating the controlled rotational speed N by inputting, into the Affinity Laws, the determined nominal value, Hn, Qn, the measured current value, H, Q, and the known nominal rotational speed, Nn, of the turbomachine, determining the number p of pole pairs of the electric motor (11) based on the ratio of the electrical frequency Fe and the calculated controlled rotational speed N, and adapting the setup of the variable speed drive (13) to match the determined number p of pole pairs.
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2.发明公开
公开(公告)号：EP3840210A1
公开(公告)日：2021-06-23
申请号：EP19306724.6
申请日：2019-12-20
发明人： JEBAI, Al Kassem , KOTEICH, Mohamad
IPC分类号： H02P1/04 , H02P29/02 , H02P29/024 , H02P29/032 , H02P29/50
摘要： A method for determining a resonance frequency of a mechanical system (4) comprising an electric motor (6) coupled to a mechanical load (8), said method comprising:
starting the motor by providing a supply voltage using a motor controller;
once the electric motor is running at a predefined target rotational speed, applying a first excitation signal comprising a voltage pulse superimposed to the supply voltage;
measuring a mechanical response of the mechanical system, using a measurement system (18) coupled to the motor;
analyzing the measured response, to determine at least one resonance frequency of the mechanical system.-
公开(公告)号：EP4246800A1
公开(公告)日：2023-09-20
申请号：EP22305296.0
申请日：2022-03-15
发明人： KOTEICH, Mohamad
摘要： Examples include a method for detecting the evolution of the magnetic state of a permanent magnet rotor. The method comprises, during a first and a second time interval, applying a respective direct current command signal to the motor to estimate a respective stator resistance value, and applying a respective alternative voltage command signal corresponding to a specific direct axis stator current value to the motor while measuring respective stator phase current values. The method also comprises determining respective rotor flux parameters in function of the measured respective stator phase current values and of the estimated respective stator resistance values. The method further comprises comparing the respective rotor flux parameters. The first and second time intervals are separated by a time period which exceeds at least 100 times any one of a first or second interval length.
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公开(公告)号：EP4387068A1
公开(公告)日：2024-06-19
申请号：EP22306890.9
申请日：2022-12-15
发明人： DUTREY, Alain , KOTEICH, Mohamad
IPC分类号： H02M1/14 , H02M1/32 , H02M7/48 , H02M7/5387 , G01R31/64
摘要： Method to estimate a remaining of useful life of a DC link capacitor (3) of a converter (1) through determination of a minimum value Clim of its capacitance C under which performances of the converter are considered as insufficient comprising:
- implementing a real time model (130, 230) comprising a motor drive model and a capacitor model using decreasing capacitor values (140, 150, 240, 250) to calculate a forecasted minimum capacitance Clim sufficient for keeping at least one of DC voltage ripple, motor current ripple, speed ripple or torque ripple under a specified value;
- calculating a time difference between a time Tactual, for which the capacitor has an estimated capacitance based on an ageing curve Ccurve, and a time Tlim for which the capacitor will have the forecasted minimum capacitance Clim, with the use of an ageing curve Ccurve of said capacitor and estimating the remaining useful life of said capacitor Tactual-Tlim (120).-
公开(公告)号：EP4346089A1
公开(公告)日：2024-04-03
申请号：EP23200121.4
申请日：2023-09-27
发明人： COMBES, Pascal , KOTEICH, Mohamad
IPC分类号： H02P21/14 , H02P25/022 , H02P21/20
摘要： Examples include a method for determining a static load torque at standstill applied to a salient pole synchronous motor. The method comprises fixing a first non-zero torque-producing current component and controlling motor speed using a speed loop regulation of a first regulated component to reach a first zero motor speed steady state corresponding to the fixed first non-zero current component, the motor being subjected to the specific static load torque. The method further comprises controlling motor speed using a speed loop regulation of a second regulated component to reach a second zero motor speed steady state corresponding to a fixed second non-zero torque-producing current component, the motor being subjected to the specific static load torque, the first non-zero current component and the second non-zero current component corresponding to different values. The load torque is estimated as a function of components of the first and second zero motor speed steady states.
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公开(公告)号：EP4346088A1
公开(公告)日：2024-04-03
申请号：EP22306448.6
申请日：2022-09-29
发明人： GHASSANI, RASHAD , KOTEICH, Mohamad
IPC分类号： H02P21/14 , H02P25/022
摘要： Examples include a method for determining a permanent magnet flux state of a rotor in a synchronous motor using a VSD. The method comprises obtaining d-axis and q-axis inductance values of the motor, fixing a non-zero stator current magnitude and controlling a motor speed using a speed loop regulation in a stator current angle γ polar coordinate frame to reach a zero motor speed steady state corresponding to the fixed non-zero stator current magnitude, to the obtained d-axis and q-axis inductance values, and to a no-load situation. The method further comprises recording coordinates of the reached steady state.
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公开(公告)号：EP4346087A1
公开(公告)日：2024-04-03
申请号：EP22306447.8
申请日：2022-09-29
发明人： COMBES, Pascal , KOTEICH, Mohamad
IPC分类号： H02P21/14 , H02P25/022
摘要： Examples include a method for determining a static load torque at standstill applied to a salient pole synchronous motor. The method comprises fixing a first non-zero torque-producing current component and controlling motor speed using a speed loop regulation of a first regulated component to reach a first zero motor speed steady state corresponding to the fixed first non-zero current component, the motor being subjected to the specific static load torque. The method further comprises controlling motor speed using a speed loop regulation of a second regulated component to reach a second zero motor speed steady state corresponding to a fixed second non-zero torque-producing current component, the motor being subjected to the specific static load torque, the first non-zero current component and the second non-zero current component corresponding to different values. The load torque is estimated as a function of components of the first and second zero motor speed steady states.
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公开(公告)号：EP4113826A1
公开(公告)日：2023-01-04
申请号：EP21305899.3
申请日：2021-06-30
发明人： DEVOS, Thomas , KOTEICH, Mohamad
摘要： Examples include a method for controlling a variable speed drive driving an electric motor. The variable speed drive is connected to an electric power source and comprises a passive DC-link and an inverter stage controlled by a first controller of the variable speed drive. The passive DC-link is connected to the inverter stage. The method comprises running the electric motor to reach a steady-state operating point, measuring a plurality of values of current or voltage of the passive DC-link, and computing, by a second controller, a frequency spectrum of the DC-link based on the plurality of values of current or voltage measured. The method further comprises detecting a specific resonance frequency by comparing amplitudes of the frequency spectrum to a predetermined pattern, and modifying filter parameters of a digital filter of the DC-link or control parameters of a control law of the electric motor based on the specific resonance frequency.
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