Comparison of losses in star- and delta-connected induction motors with saturated core

Ferreira, Fernando J. T. E.; Silva, Andre M.; Cruz, Sérgio M. A.; Almeida, Anı́bal T. de

doi:10.1109/iemdc.2017.8002312

Cited by 12 publications

(6 citation statements)

References 10 publications

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“…10. A non-negligible homopolar flux component is present, which slightly increases by the current, a clear effect of the saturation and the distortion current waveform, [17]. The relation between this effect and the torque ripple is shown in Fig.…”

Section: A Lp Model Closed In Control Loopmentioning

confidence: 91%

Finite Elements Model Co-Simulation of an Induction Motor Drive for Traction Application

Leonardo

Popescu

Tursini

et al. 2019

IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society

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This paper presents the results obtained by the finite elements model co-simulation technique in the transient analysis of an electric drive for advanced traction applications. The case study refers to a 200kW induction motor drive designed for a premium electric vehicle in the frame of the Horizon 2020 "ReFreeDrive" project (Rare earth Free e-Drives featuring low cost manufacturing). The transient performance and the operating limits are evaluated when a field-oriented control strategy based on the lumped parameters model of the machine is used. The co-simulation involves the ANSYS/Simplorer and MATLAB/Simulink environments. The finite element motor model developed in ANSYS is controlled by the rotor flux-oriented controller with axes decoupling built in Simulink. A lumped parameters motor model is also derived to design the control parameters and implemented in Simulink for comparison respect to the co-simulation approach. The results highlight the influence of the controller detuning for the correct prediction of the voltage limit operation at steady state.

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Section: A Lp Model Closed In Control Loopmentioning

confidence: 91%

Finite Elements Model Co-Simulation of an Induction Motor Drive for Traction Application

Leonardo

Popescu

Tursini

et al. 2019

IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society

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“…The reason is that the winding currents in the SRM have different phase angles, while the windings are connected in series. As a result, the circulating current has to contain the harmonic waves [18] . This is the author's version of an article that has been published in this journal.…”

Section: Comparison Between Different Methodsmentioning

confidence: 99%

A Novel Driving Method for Switched Reluctance Motor With Standard Full Bridge Inverter

Sun

Moghaddam

Sergeant

et al. 2020

IEEE Trans. Energy Convers.

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This paper proposes a new driving method for a switched reluctance motor (SRM) by using a standard full bridge. The windings in the SRM are connected in series to build a ring structure, where a controllable DC source is inserted. Based on the new structure, the theoretical analysis and calculation are made to determine the control parameters. Besides three-phase SRM, the new idea can also be applied to the SRMs with four and five phases. The new driving method is compared with the conventional method by simulation. The results show that with the new method, the ripple of torque and speed in the SRM reduces. The influence of the proposed method on the power rating and losses is then analyzed. The validation is also made to verify the application of the new method and the difference between the conventional driving method and the proposed method. The measured results match the simulated results well.

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“…As a result, the output voltage of the VSI legs can be derived under different current polarities. From Figure 2, the average voltage error in one PWM cycle can be expressed as (2), which varies with the current polarity indicated by sign function…”

Section: Nonlinear Characteristics Of the Inverter For Low-voltage Electric Vehiclesmentioning

confidence: 99%

“…In such a situation, the high-power battery pack with low-voltage outputs a large current, i.e., several hundred amperes. Thus, a delta-connected IM is better than a star-connected one in low-voltage IM drive systems [2]. However, introducing a delta-connected motor to drive system brings new challenges regarding the compensation of nonlinear characteristics which include dead-time, the on/off delay, and the voltage drop across the power devices in the voltage source inverter (VSI).…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Characteristics Compensation of Inverter for Low-Voltage Delta-Connected Induction Motor

Guo

Dong

et al. 2020

Energies

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This paper proposes a scheme that can compensate for the nonlinear characteristics of voltage source inverters (VSIs) for low-voltage delta-connected induction motors (IMs). Due to the nonlinearity introduced by the dead-time, the on/off delay, and the voltage drop across the power device, the output voltage of VSIs is seriously distorted, causing distortion in the phase current of the IM, which will lead to output torque ripple. However, the existing compensation methods for three-phase VSIs are derived from star-connected loads, or ignore the conducting properties of power devices. Moreover, the current polarity detection near the current zero is quite complex. In this paper, by taking such nonlinear characteristics into consideration, especially the conducting property of metal-oxide-semiconductor field effect transistors (MOSFETs), an output voltage model of VSIs for low-voltage delta-connected induction motors is presented. After that, in view of the difficulty in detecting the line current polarity near the current zero which might lead to the wrong compensation, an advancing current crossing zero (ACCZ) compensation is proposed. Subsequently, a compensation scheme which combines the compensation based on the VSI output voltage model and ACCZ compensation is proposed. Finally, the proposed compensation scheme is implemented based on a digital signal processor (DSP) drive system. The experimental results show that the proposed scheme has better performance than the common method in terms of suppressing the effect of the nonlinear characteristics of VSI, which demonstrates that the proposed compensation scheme is feasible and effective for the compensation of the nonlinear characteristics of VSI for low-voltage delta-connected IMs.

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Comparison of losses in star- and delta-connected induction motors with saturated core

Cited by 12 publications

References 10 publications

Finite Elements Model Co-Simulation of an Induction Motor Drive for Traction Application

Finite Elements Model Co-Simulation of an Induction Motor Drive for Traction Application

A Novel Driving Method for Switched Reluctance Motor With Standard Full Bridge Inverter

Nonlinear Characteristics Compensation of Inverter for Low-Voltage Delta-Connected Induction Motor

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