Journal ArticleDOI
Impact of Supply Voltage Unbalance and Harmonics on DC Bus Electrolytic Capacitor of Adjustable Speed Drives
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TLDR
The article proposes the derating of load required to keep the capacitor current within the safe value irrespective of the level of abnormalities and grid impedance.Abstract:
Among the various supply voltage abnormalities, unbalance and distortion are some of the major threats to the dc bus capacitor of adjustable speed drives. The effect of supply voltage unbalance on the dc bus capacitor changes in the presence of supply voltage harmonics. Further, the value of grid impedance and the load on the drive influences the response of these supply voltage abnormalities on the dc bus capacitor. This article analyzes the impact of unbalance, distortion, and simultaneous presence of unbalance and distortion in the supply voltage, on the dc bus capacitor, along with the effect of grid impedance and the load on the drive. As a result of the analysis, the article proposes the derating of load required to keep the capacitor current within the safe value irrespective of the level of abnormalities and grid impedance. The effects are analyzed by simulations and validated by the hardware test setup.read more
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References
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Journal ArticleDOI
Analysis of Effects of Three-Phase Voltage Unbalance on Induction Motors with Emphasis on the Angle of the Complex Voltage Unbalance Factor
TL;DR: In this paper, the steady-state performance of an induction motor connected to unbalanced three-phase voltages is analyzed and the effect of the angle of the CVUF on the motor is discussed.
Journal ArticleDOI
Effect of supply voltage harmonics on the input current of single-phase diode bridge rectifier loads
TL;DR: In this paper, the effect of supply voltage harmonics on the response of single-phase capacitor-filtered diode bridge rectifier loads was investigated, and a complete analytical model for calculating the current harmonics of these loads, when energized by nonsinusoidal supply voltages, was presented.
Journal ArticleDOI
Impact of input voltage sag and unbalance on dc link inductor and capacitor stress in adjustable speed drives
TL;DR: In this paper, the impact of input voltage unbalance and sags on stresses in the dc-bus choke inductor and dcbus electrolytic capacitors of adjustable-speed drives (ASDs) was investigated.
Proceedings ArticleDOI
Characterization of three-phase unbalanced dips (as easy as one-two-three?)
Math Bollen,E. Styvaktakis +1 more
TL;DR: In this paper, a three-phase load was used to characterize voltage dip as experienced by a three phase load and the primary result of the method is a so-called "characteristic magnitude" which corresponds to the magnitude (remaining voltage) as used for the existing methods to characterize dips experienced by single-phase loads.
Proceedings ArticleDOI
An evaluation of the DC-link capacitor heating in adjustable speed drive systems with different utility interface options
TL;DR: In this article, an evaluation of DC-link capacitor heating in adjustable speed drive systems with different utility interface options is presented based on the level of ripple currents DClink capacitors can endure that lead to self-heating and reduction of capacitors' operating life.
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