Proposition of new mathematical models with core loss factor for controlling AC motors

Shinnaka, Shinji

doi:10.1109/iecon.1998.724139

Cited by 42 publications

(48 citation statements)

References 8 publications

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“…Fig. 9 illustrates the dynamic T model augmented with the stator-iron-loss resistance R Fe,s [17], [18] and the stray-loadloss resistance R Fe,σ [19]. The losses related to constant R Fe,s and R Fe,σ are proportional to ω 2 s ψ 2 s and ω 2 r ψ 2 rσ , respectively, in steady state.…”

Section: Discussionmentioning

confidence: 99%

Modeling of Mutual Saturation in Induction Machines

Tuovinen¹,

Hinkkanen²,

Luomi³

2008

2008 IEEE Industry Applications Society Annual Meeting

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Abstract-Mutual saturation between the main flux and the rotor leakage flux appears in induction machines, especially if the rotor slots are skewed or closed. Conventional saturation models used in connection with dynamic equivalent-circuit models do not take this phenomenon into account. In this paper, explicit functions for modeling the mutual saturation are proposed. The proposed functions are physically reasonable, they are easy to fit, and the number of their parameters is small. The proposed functions can be used in real-time applications and in computer simulations where high accuracy and physical consistency are preferable. The model fits well to the data obtained from finite element analysis or experimental data of a 2.2-kW motor.

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Section: Discussionmentioning

confidence: 99%

Modeling of Mutual Saturation in Induction Machines

Tuovinen¹,

Hinkkanen²,

Luomi³

2008

2008 IEEE Industry Applications Society Annual Meeting

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“…If needed, the iron losses can be taken into account separately [17], [19], [20]. A short-circuited rotor winding will be considered in this paper, i.e.…”

Section: Machine Modelmentioning

confidence: 99%

“…Afterψ σ and i R were solved from (18) and (19) in every operation point used in the indirect parameter estimation,R R was solved from the rotor voltage equation (3b) in steady state. The mean valuê R R = 0.0416 p.u.…”

Section: B Experimentsmentioning

confidence: 99%

Modeling of Saturation Due to Main and Leakage Flux Interaction in Induction Machines

Tuovinen¹,

Hinkkanen²,

Luomi³

2010

IEEE Trans. on Ind. Applicat.

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Abstract-Saturation due to the main flux and rotor leakage flux interaction appears in induction machines, especially if the rotor slots are skewed or closed. Conventional saturation models used in connection with dynamic equivalent-circuit models do not take this phenomenon into account. In this paper, explicit functions for modeling this mutual saturation are proposed. These functions are physically reasonable, they are easy to fit, and the number of their parameters is small. The proposed functions can be used in real-time applications and in computer simulations if high accuracy and physical consistency are preferable. The model fits well to the data obtained from finite element analysis or experimental data of a 2.2-kW motor. The model predicts the stator current with good accuracy both in steady state and in transients.

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“…(5) to (9), the second term in the energy transfer equation (core loss) can be rewritten as follows [1][2][3]:…”

Section: Circuit Equation (First Basic Equation) Torque Equation (Secmentioning

confidence: 99%

A new separate‐identification method of two stator equivalent core‐loss resistances corresponding to hysteresis and eddy‐current losses for parallel‐type mathematical models of AC motors

Shinnaka

2003

Electrical Engineering Japan

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SUMMARYThis paper proposes a new unified method for identifying equivalent stator core-loss resistance of AC motors, which can be applied to both induction and synchronous motors. In order to realize AC motors that exhibit high performance such as precise torque generation and/or efficient energy transmission, stator core loss cannot be neglected in designing vector control systems. It is common to model stator core loss in magnetic circuits as loss caused by equivalent resistance in electrical circuit. One of the best mathematical models for controlling AC motors with core loss is a kind of parallel-type model that succeeds in modeling both eddy-current and hysteresis losses. The newly proposed method succeeds in identifying separately and simultaneously two kinds of equivalent core-loss resistances on the model corresponding to eddy-current and hysteresis losses. The practical usefulness of the method is evaluated and confirmed through experiments using two induction motors of 5.5 and 2.0 kW having relatively high core losses and a permanent magnet synchronous motor of 750 W having relatively low core losses.

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Proposition of new mathematical models with core loss factor for controlling AC motors

Cited by 42 publications

References 8 publications

Modeling of Mutual Saturation in Induction Machines

Modeling of Mutual Saturation in Induction Machines

Modeling of Saturation Due to Main and Leakage Flux Interaction in Induction Machines

A new separate‐identification method of two stator equivalent core‐loss resistances corresponding to hysteresis and eddy‐current losses for parallel‐type mathematical models of AC motors

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