Impact of PWM Techniques in Efficiency and Power Density of a 70kVA Multilevel Inverter for More Electric Aircrafts

Mendes, Caio C.O.; Sathler, Hans Hoffmann; Cougo, Bernardo; Stopa, Marcelo Martins; Costa, François; Labrousse, Denis

doi:10.23919/epe21ecceeurope50061.2021.9570675

Cited by 2 publications

(3 citation statements)

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“…This drawback can be overcome by inserting a so-called zero-sequence signal v 0 , or common mode offset (CMO), into the modulating signal. Through the insertion of such an offset, the output current THD can be reduced and the linearity range of the output voltage can be increased [40]. One example of this is the third harmonic injection (THI) PWM.…”

Section: Modulation Schemesmentioning

confidence: 99%

“…The insertion of such a (time) continuous signal leads to so-called continuous PWM (CPWM). Discontinuous PWM (DPWM) results when discontinuous modulation waves are used to further increase the voltage linearity range and reduce switching losses [40].…”

Section: Modulation Schemesmentioning

confidence: 99%

“…Examples are the phase disposition (PD), phase shift (PS), phase opposition disposition (POD), or alternative phase opposition disposition (APOD) methods. More information on multi-level inverter multi-carrier PWM techniques can be found, for instance, in [36,40,41]. Examples of PD, PS, and POD carrier signals (three-level case) are shown in Figure 5.…”

Section: Modulation Schemesmentioning

confidence: 99%

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Review, Comprehensive Analysis and Derivation of Analytical Power Loss Calculation Equations for Two- to Three-Level Midpoint Clamped Inverter Topologies with Hybrid Switch Configurations

Radomsky,

Mallwitz

2023

Energies

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Increased performance requirements in new power electronics areas of application, such as electric aircraft, make innovations on different design levels necessary. In order to quickly compare different topologies, analytical loss equations provide a fast and straightforward way to narrow down the possible solution space. The approach widely used in the literature results in long and complex terms, which can only be compared between different literature sources with great effort. Moreover, the literature lacks a detailed summarizing description of these analytical equations and their derivation, starting from the standard two-level VSI up to three-level midpoint clamped inverter topologies, such as the ANPC topology in its different modulation schemes. The application of such higher-level inverter topologies allows hybrid device configurations to become performant solutions. This work aims to give a closed-form description of the analytical loss modeling and the theoretical background and provide an implementation approach for a wide span of inverter topologies and for different modulation methods.

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Section: Modulation Schemesmentioning

confidence: 99%

Section: Modulation Schemesmentioning

confidence: 99%