Investigation of discontinuous PWM as additional optimization parameter in an active thermal control

Kaczorowski, Dennis; Mittelstedt, Marvin; Mertens, Axel

doi:10.1109/epe.2016.7695610

Cited by 7 publications

(1 citation statement)

References 4 publications

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“…However, this approach leads to an undesired fluctuation in the output current spectrum, making it unsuitable for many applications. Typically, the DPWM is employed to minimize switching losses by clamping the output voltage at either the positive or negative dc-link voltage [15,16]. This leads to a significant decrease in losses when compared to continuous PWM since the power semiconductors remain unswitched during the clamping intervals.…”

Section: Introductionmentioning

confidence: 99%

Development of Various Types of Independent Phase Based Pulsewidth Modulation Techniques for Three-Phase Voltage Source Inverters

Nguyen,

Kwak,

Choi

2023

Machines

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Discontinuous pulse-width-modulation (DPWM) methods have been extensively used in the industrial area to reduce overall losses, which decreases the corresponding thermal stress on the power switches of converters. However, local thermal overload can arise due to different aging conditions of semiconductor devices or failure in the cooling system. This leads to reduced reliability of the converter system due to the low expected lifespan of the most aged switches or phase legs. In this paper, the modified DPWM strategies for independent control of per-phase switching loss are introduced to deal with this matter. The proposed per-phase DPWM techniques are generated by modifying the conventional three-phase DPWM methods for reducing the switching loss in a specific leg, whereas the output performance is not degraded. This paper reports on output performance, including output current total harmonic distortion (THD) and power loss of switching devices, analysis for the various modified DPWM strategies for independent control of per-phase switching loss, which is applicable in 2-level 3-phase voltage source inverters (2L3P VSIs). The results are compared to the corresponding continuous PWM technique to verify and analyze the effectiveness and accuracy of the modified DPWM strategies for independent control of per-phase switching loss.

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Section: Introductionmentioning

confidence: 99%