摘要:
Die vorliegende Erfindung schafft ein Verfahren und eine Vorrichtung, um bereits während der Aufmagnetisierungsphase, in der das Rotorfeld eines Rotors einer Asynchronmaschine aufgebaut wird, den Rotorfeldwinkel der Asynchronmaschine zu ermitteln. Daraufhin kann die Asynchronmaschine bereits während der Aufmagnetisierungsphase in einem geregelten Betrieb angesteuert werden. Somit können die Anlaufeigenschaften der Asynchronmaschine verbessert werden, die Aufmagnetisierungsphase der Asynchronmaschine verkürzt sich und es ist bereits in der Aufmagnetisierungsphase möglich, ein gewünschtes Drehmoment einzustellen.
摘要:
A system and method of controlling a motor are disclosed. The system comprises a current observer for observing a motor current at a sampling rate and a proportionate-integral controller that provides a proportionate path and an integral path and at least forms part of a proportionate-integral control loop based on the motor current. The current observer observes a motor current of the motor at a sampling rate. The proportionate path calculates, for a present cycle of the sampling rate, a proportionate path term for the proportionate-integral control loop based on the motor current. The system outputs a respective motor output voltage to the motor in conformity with the proportionate path term calculated for the present cycle. In conformity with the motor current, the integral path calculates an integral path term for another respective motor output voltage to be used in a later cycle of the sampling rate.
摘要:
At least one example embodiment discloses a drive system (100) including a motor (155) including a rotor, the motor (155) configured to receive a measured current, a controller (102) configured to generate a voltage for the motor (155) at a stationary reference frame, the measured current being based on the voltage, a filter (168) configured to obtain position information of the rotor based on the measured current and a nonlinear observer (170) configured to estimate a rotor position of the motor (155) during the stationary reference frame based on the position information. The controller (102) is configured to control the motor (155) based at least in part on the estimated rotor position.
摘要:
The invention relates to a method for determining the position &thetas;rot and the speed &OHgr;rot of a rotor of a synchronous electric machine, said electric machine being provided with at least one means for measuring the position of said rotor, and a means for measuring the voltages and the currents of the phases of said electric machine. For said method, the following steps are carried out: the position &thetas;m and the speed &OHgr; m of said rotor of said electric machine are measured by said position-measuring means; the voltages um and the currents im of the phases of said electric machine are measured by said current and voltage measuring means; the total magnetic flux ϰα&bgr; circulating in said electric machine is estimated from the measured voltages um and currents im using a state observer; an estimated position &thetas; and speed &OHgr; of said rotor of said electric machine are derived from the total magnetic flux; and the position &thetas;rot and the speed &thetas;rot of said rotor of said electric machine are considered to be equal to the estimated position &thetas; and speed &OHgr;, or are considered to be equal to the position &thetas;m and speed &OHgr;m measured on the basis of the speed &OHgr;rot .
摘要:
Método de estimación de la resistencia de estator de máquinas eléctricas, en donde se calcula un primer valor del flujo de estator mediante un modelo de referencia y se calcula un segundo valor del flujo de estator mediante un estimador de flujo de estator, obteniéndose una señal de error (e) de la diferencia d eambos valores del flujo de estator, y calculándose unnuevo valor de la resistencia de estator (Rs) mediante una reducción temporal de la señal de error (e) cuando se cumple la condición: (I), Siendo: T em el par electromagnético de la máquina eléctrica; p el número de pares de polos de la máquina eléctrica; AR S max el máximo error de estimación de la resistenciade estator; ϖs la pulsación eléctrica de alimentación de la máquina eléctrica, i s la corriente de estator de la máquina eléctrica.
摘要:
Bei der Regelung einer Leistungsfaktorkorrekturschaltung werden Regelschritte in Abhängigkeit von wenigstens einem Regelparameter durchgeführt. Eine Messgröße (65) wird in der Leistungsfaktorkorrekturschaltung erfasst. Der wenigstens eine Regelparameter wird selektiv abhängig von der erfassten Messgröße (65) geändert, beispielsweise wenn die Messgröße (65) einen ersten Schwellenwert (61) erreicht. Durch die Änderung des wenigstens einen Regelparameters kann ein rascheres oder langsameres Regelverhaiten erreicht werden. Der geänderte wenigstens eine Regelparameter wird in wenigstens einem Regelschritt verwendet.
摘要:
Method for determining the rotor angle of a synchronous machine, in particular using only a single two-component or three-component current measuring channel, and drive for carrying out the method, in particular wherein the synchronous machine has a stator inductance that is dependent on the rotor position, wherein an inverter supplies the stator of the synchronous machine with a pulse-width-modulated three-phase voltage which can be identified by a voltage space vector for each half of a pulse width modulation period, wherein the motor current is measured and is used to form an associated motor current space vector and, at least on the basis thereof, the voltage space vector is determined at least for a particular pulse width modulation period, wherein the voltage space vector is composed of a component associated with a fundamental component and of a component associated with a carrier signal at a higher frequency than the fundamental component, wherein the carrier signal is in the form of a periodic signal, the period duration of which is an integer multiple of the pulse width modulation period, in particular is at least two or three times the pulse width modulation period, wherein the carrier signal is a binary signal, wherein the carrier signal has a pattern without average values, in particular when averaging over the period duration of the carrier signal, wherein the carrier signal can be clearly identified by virtue of a voltage value being associated with each half of a pulse width modulation period, wherein the fundamental component of the voltage space vector is constant during the period duration of the carrier signal, wherein the current component associated with the fundamental component and the current component associated with the carrier signal are determined from the measured current values.
摘要:
The present invention relates to a control circuit (1) that controls the permanent magnet synchronous motor (M) used in driving the drum in washing machines, that comprises a converter (2) that converts AC mains voltage to DC voltage, a three-phase inverter (3) that inverts the direct current received from the converter (2) to three phase current (la, lb, lc), a speed and position estimator (4) that detects the data relating to position and speed of rotor by means of voltage sensors during start up and operation of the motor (M) and a microcontroller (5) that provides control of the motor (M) by sending sinusoidal switching signals to the three-phase inverter (3) with the signals received from the speed and position estimator (4).
摘要:
The invention relates to a method and a device for determining output torque (Mreal) of an electric drive (20) by measuring a current (I) received by the electric drive (20). According to the invention, a correction current (lkorr) is calculated from the determined interference torques (Mstör) and a corrected current (I*) is determined from the measured current (I) and the correction current (lkorr) and is emitted, said corrected current representing a real output torque (Mreal) of the electric drive (20).