Methods for increasing the efficiency of an asynchronous motor with increased speed fed from the PWM inverter

Dems, M.; Komęza, Krzysztof; Rodríguez, H.

doi:10.3233/jae-182308

Cited by 6 publications

(1 citation statement)

References 14 publications

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“…Figure 7 shows the BH curve and specific core loss for a wide range of frequencies, while Table 4 shows the basic dimensions used for the field-circuit model. For field-circuit analysis, the commercial software OPERA 2D RM module with the transient eddy-current solver was chosen included rotation and a circuit description of the windings with multi-slice modeling of the skewed rotor bars [28][29][30][31][32][33][34]. Calculations of losses in the motor core using the field-circuit approach were performed using the method described in [30,35] and presented in Figure 8.…”

Section: Methodsmentioning

confidence: 99%

Increase the Efficiency of an Induction Motor Feed from Inverter for Low Frequencies by Combining Design and Control Improvements

et al. 2022

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Speed-controlled induction motors have the most significant potential for energy savings. The greatest problems with obtaining high efficiency occur in motors with a wide range of rotational speed regulation, as in the motors for driving industrial washing machines under consideration. While for the highest speeds, the dominant phenomenon is at field weakening. The problem is obtaining the optimal size of the magnetic flux for low rotation speed to prevent excessive saturation increasing current, and reduction of efficiency. This problem is usually solved by selecting the appropriate control for an already built machine. The authors propose a combination of activities when designing the motor structure with the selection of proper control, which allows for high efficiency. Since the drive does not require precise speed control or obtaining the required dynamics, it was possible to use an inexpensive control in an open loop, avoiding the cost of transmitters. Furthermore, the number of design parameters that are subject to change is significantly limited by technological factors and the available space in the washing machine. Proper parameter selection was made using a peripheral method assisted by field-circuit simulations. The proposed approach can be used in designing structures and selecting motors controls for other applications.

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Section: Methodsmentioning

confidence: 99%

Increase the Efficiency of an Induction Motor Feed from Inverter for Low Frequencies by Combining Design and Control Improvements

et al. 2022

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Designing an Energy-Saving Induction Motor Operating in a Wide Frequency Range

Dems

Komęza

2022

IEEE Trans. Ind. Electron.

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Analysis of overall system stability of grid-connected PV inverter with LCL-filter considering two kinds of possible current feedback

Tian

Cao

et al. 2019

International Journal of Applied Electromagnetics and Mechanics

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Compared with L-and LC-filter, the LCL-filter attracts more and more research interests for its excellent harmonic suppression ability. However, the resonance peak of the LCL-filter may introduce potentially unstable dynamics that need to be carefully damped. Considering the PWM discrete nature and practical implementation in discrete form, to analysis the overall system stability is complex especially when considering the controller and the LCL-filter active damping as a whole system. Moreover different sampling frequency and different delay time that are specific in discrete domain influence the system stability scenario, which increase the analysis complexity. Different from the low order filter, LCL-filter offers two kinds of possible current feedback, which presents totally different impact on overall system stability. In this paper, the stability of the overall system in discrete domain with two kinds of possible current feedback is investigated in detail. Three typical sampling frequency: high sampling frequency, medium sampling frequency and low sampling frequency are considered. And three typical delay time of active damping control: 0, T s∕2, T s are introduced into stability analysis process. Experimental results get from a 3 kW laboratory prototype based on the TMS320F2808 are provided to validate the theoretical analysis presented in this paper.

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Methods for increasing the efficiency of an asynchronous motor with increased speed fed from the PWM inverter

Cited by 6 publications

References 14 publications

Increase the Efficiency of an Induction Motor Feed from Inverter for Low Frequencies by Combining Design and Control Improvements

Increase the Efficiency of an Induction Motor Feed from Inverter for Low Frequencies by Combining Design and Control Improvements

Designing an Energy-Saving Induction Motor Operating in a Wide Frequency Range

Analysis of overall system stability of grid-connected PV inverter with LCL-filter considering two kinds of possible current feedback

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