Nonlinear Characteristics Compensation of Inverter for Low-Voltage Delta-Connected Induction Motor
Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
Author(s)
Detail(s)
Original language | English |
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Article number | 590 |
Number of pages | 13 |
Journal / Publication | Energies |
Volume | 13 |
Issue number | 3 |
Online published | 28 Jan 2020 |
Publication status | Published - Feb 2020 |
Externally published | Yes |
Link(s)
DOI | DOI |
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Attachment(s) | Documents
Publisher's Copyright Statement
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Link to Scopus | https://www.scopus.com/record/display.uri?eid=2-s2.0-85079012744&origin=recordpage |
Permanent Link | https://scholars.cityu.edu.hk/en/publications/publication(a6309c0f-28d4-4a19-ae3e-81f33e47465e).html |
Abstract
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.
Research Area(s)
- dead-time effect, electric vehicle, induction motor, voltage source inverter, compensation scheme, DEAD-TIME, VSI, STABILITY, SCHEME
Citation Format(s)
Nonlinear Characteristics Compensation of Inverter for Low-Voltage Delta-Connected Induction Motor. / Guo, Qiang; Dong, Zhiping; Liu, Heping et al.
In: Energies, Vol. 13, No. 3, 590, 02.2020.Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
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