Standstill Parameter Identification of Vector-Controlled Induction Motor Using Frequency Characteristics of Rotor Bars

Kwon, Youngsu Cho; Lee, Jeong-Hum; Moon, Sang-Ho; Kwon, Byung-Ki; Choi, Changho; Seok, Jul-Ki

doi:10.1109/08ias.2008.227

Cited by 9 publications

(10 citation statements)

References 17 publications

(11 reference statements)

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“…According to (10), at steady-state (i mr = i ds = I ds ) the d-axis stator flux linkage may be expressed as Ψ ds = L s I ds , and the saturation characteristic Ψ ds (I ds ) practically does not depend on the load condition [3]. This characteristic can be identified at low-load condition by means of a procedure proposed in this paper.…”

Section: Machine Voltage Equationsmentioning

confidence: 98%

“…The d-axis stator flux linkage estimation model is formulated from (18) by taking into account (10). This yieldŝ…”

Section: Formulation Of Estimation Modelsmentioning

confidence: 99%

“…The method presented in [9], which deals with the parameter identification of the analytical inverse magnetization curve implemented in the control system, requires that the machine is not coupled to the load and that the voltage measuring equipment is available. A newer paper dealing with the self-commissioning at standstill does not deal with the magnetization curve at all [10].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Magnetization Curve Identification of Vector-Controlled Induction Motor at Low-Load Conditions

Terzić

Despalatović

Slutej³

2012

Automatika

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Original scientific paperIn many drives the induction motor torque is transferred to the load through complex mechanical connections which produce an initial load. In such cases, to identify the magnetization curve by the no-load test it is necessary to decouple the motor from the transfer gear what is expensively and time-consuming. In an attempt to avoid the motor mechanical decoupling in the case of hoist crane systems, in this paper a method is proposed for the magnetization curve identification of the indirect rotor flux oriented (IRFO) induction machine at low-load conditions. Two flux controllers with estimated feedback quantities are added to the basic structure of the IRFO control drive. One of these controllers is used to control desired operating point on the magnetization curve and the other for on-line adaption of the reference frame position. The proposed algorithm is implemented in a commercial drive as a part of the self-commissioning module. Afterward, the magnetization curve of the 22 kW induction motor was identified and compared with the one obtained by the no-load test. The method sensitivity to the load torque and the transient inductance has also been considered. Key words: Induction motors, Magnetization curve, Parameter estimation, Vector controlOdredivanje krivulje magnetiziranja vektorski upravljanog asinkronog motora kod malih opterećenja. Brojni su primjeri pogona u kojima se moment asinkronog stroja prenosi na radni mehanizam preko mehaničkih reduktora koji mogu predstavljati značajno opterećenje motoru i u režimu neopterećenog pogona. Da bi se u takvim slučajevima odredila krivulja magnetiziranja iz pokusa praznog hoda nužno je odspojiti motor od reduktora što je skupo i vremenski zahtjevno. U pokušaju da se izbjegne mehaničko odspajanje motora kod dizaličnih sustava, u ovom je radu predložena metoda za odredivanje krivulje magnetizranja vektorski upravljanog asinkronog motora kod malih iznosa opterećenja. Dva regulatora ulančenog toka s estimiranim veličinama u granama povratne veze dodani su osnovnoj strukturi vektorski upravljanog pogona. Jedan od regulatora koristi se za upravljanje željenom radnom točkom na krivulji magnetiziranja dok se drugi koristi za podešavanje referentnog položaja vektora toka rotora. Predloženi algoritam implementiran je u komercijalnom uredaju kao jedan od samopodešavajućih modula koji se koriste prilikom puštanja u rad pogona. Nakon toga je opisanim postupkom odredena krivulja magnetiziranja 22 kW asinkronog motora i usporedena s krivuljom dobivenom iz klasičnog pokusa praznog hoda. Takoder je razmotrena i osjetljivost metode na iznos momenta opterećenja i tranzijentnog induktiviteta.

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Section: Machine Voltage Equationsmentioning

confidence: 98%

“…The d-axis stator flux linkage estimation model is formulated from (18) by taking into account (10). This yieldŝ…”

Section: Formulation Of Estimation Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Magnetization Curve Identification of Vector-Controlled Induction Motor at Low-Load Conditions

Terzić

Despalatović

Slutej³

2012

Automatika

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“…On the whole, variation of the rotor leakage inductance over the frequency range is firmly connected to motor parameters, such as the power range, pole-pairs number, rotor bar shape, and depth [7]. In [10], a comprehensive equation for calculating the rotor leakage inductance considering some of the aforesaid parameters was introduced. The equation was derived with respect to the DC value of the rotor leakage inductance.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Equivalent Inductance of Three-Phase Induction Motors in the Switching Frequency Range

2019

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The equivalent inductance of three-phase induction motors is experimentally investigated in this paper, with particular reference to the frequency range from 1 kHz to 20 kHz, typical for the switching frequency in inverter-fed electrical drives. The equivalent inductance is a basic parameter when determining the inverter-motor current distortion introduced by switching modulation, such as rms of current ripple, peak-to-peak current ripple amplitude, total harmonic distortion (THD), and synthesis of the optimal PWM strategy to minimize the THD itself. In case of squirrel-cage rotors, the experimental evidence shows that the equivalent inductance cannot be considered constant in the frequency range up to 20 kHz, and it considerably differs from the value measured at 50 Hz. This frequency-dependent behaviour can be justified mainly by the skin effect in rotor bars affecting the rotor leakage inductance in the considered frequency range. Experimental results are presented for a set of squirrel-cage induction motors with different rated power and one wound-rotor motor in order to emphasize the aforesaid phenomenon. The measurements were carried out by a three-phase sinusoidal generator with the maximum operating frequency of 5 kHz and a voltage source inverter operating in the six-step mode with the frequency up to 20 kHz.

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“…It should be noted that the leakage factor highly depends on the skin effect and can be measured by using the frequency characteristics [9].…”

Section: Simulations and Experimentsmentioning

confidence: 99%

Parameter Identification of an Induction Motor Drive with Magnetic Saturation for Electric Vehicle

Jeong

Lee²

2011

Journal of Power Electronics

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This paper presents a simulation model and a parameter identification scheme of an induction motor drive for electric vehicle. The induction motor in automotive applications should operate in very high efficiency and achieve the maximum-torque-per-ampere (MTPA) feature even with saturated magnetic flux under very high torque. The indirect vector control which is typically adopted in traction drive system requires precise information of motor parameters, particularly rotor time constants. This work models an induction motor considering magnetic saturation and proposes an empirical identification method using the current controller in the synchronous reference frame. The proposed method is applied to a 22kW-rated induction motor for electric vehicle.

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Standstill Parameter Identification of Vector-Controlled Induction Motor Using Frequency Characteristics of Rotor Bars

Cited by 9 publications

References 17 publications

Magnetization Curve Identification of Vector-Controlled Induction Motor at Low-Load Conditions

Magnetization Curve Identification of Vector-Controlled Induction Motor at Low-Load Conditions

Analysis of Equivalent Inductance of Three-Phase Induction Motors in the Switching Frequency Range

Parameter Identification of an Induction Motor Drive with Magnetic Saturation for Electric Vehicle

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