Improved single-zone overmodulation algorithm for space vector modulated inverters

Modi, Manoj Kumar; Narayanan, G.

doi:10.1109/pedes.2014.7042107

“…Additionally, the switching frequency and switching losses of the inverter are minimal. For these reasons, extensive research on six-step operation has been conducted [6,[11][12][13][26][27][28][29][30][31][32][33]. The contributions [12,13,[26][27][28][29] propose schemes that synthesize voltage vector trajectories in the overmodulation range up to six-step operation under the assumption of steady state without considering closed-loop control dynamics.…”

Section: A State-of-the-art Techniquesmentioning

confidence: 99%

Model Predictive Torque Control for Permanent- Magnet Synchronous Motors Using a Stator- Fixed Harmonic Flux Reference Generator in the Entire Modulation Range

Brosch

¹

,

Wallscheid

²

,

Böcker

³

2023

IEEE Trans. Power Electron.

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“…In the first approach, called 2-zone algorithms, the overmodulation region is divided into two zones [3], [6], [7]. The algorithms, called 1-zone algorithms, following the second approach treat the overmodulation range as a single undivided region from the computational point of view [8], [9].…”

Section: State Of the Art A Overmodulationmentioning

confidence: 99%

“…The modified technique has a considerably better harmonic performance than the standard one in the upper part of the overmodulation region as demonstrated in [6]. As different control variables and calculation procedures are used in the two regions, 2-zone algorithms require significant computational effort [9].…”

Section: State Of the Art A Overmodulationmentioning

confidence: 99%

“…The advantage of this technique is its simple implementation, however, the low-order harmonic distortion in line currents is much higher than in case of the standard 2-zone algorithm. An improved 1-zone algorithm is introduced in [9], where the magnitude of the voltage vector is also varied by simple equations. It significantly reduces the computational effort comparing to the standard 2-zone algorithm or the standard 1-zone method introduced in [8].…”

Section: State Of the Art A Overmodulationmentioning

confidence: 99%

“…To compare the proposed two optimized PWM techniques with other techniques available in the literature, the V W T HD values are calculated for a few γ values (5,7,9,13,21,31). The calculation is done by simulating the motor drive system presented previously using Matlab/Simulink and using the FFT() function to determine the harmonics.…”

Section: B Comparison With Existing Overmodulation Techniquesmentioning

confidence: 99%

See 2 more Smart Citations

Optimization of PWM for the Overmodulation Region of Two-Level Inverters

Stumpf

¹

,

Halasz

²

2018

IEEE Trans. on Ind. Applicat.

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Three optimized PWM techniques for the overmodulation region of two-level inverter-fed ac drives are introduced and investigated from harmonic loss minimization point of view. The optimization is elaborated for the lowest loss-factor, which is proportional to the square of rms value of current harmonics. The loss-factors are computed for different switching numbers as the function of the motor fundamental voltage. It is shown that, respect to the motor heating and torque ripples, the acceptable drive condition can be guaranteed by relatively low value of inverter switching frequency up to 96-97% of maximal possible motor voltage. Furthermore, it is shown that, the so-called Three vector methods have considerably better performance in the lower part of the overmodulation region than the so-called Two vector method for the same number of switching. The performance of the techniques is compared with other existing PWM techniques. The paper discusses the implementation details of the proposed optimal PWM techniques. The theoretical results are verified by experimental and simulation tests.

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Optimization of PWM for overmodulation region of two-level inverters

Stumpf

¹

,

Halasz

²

2016

2016 IEEE International Power Electronics and Motion Control Conference (PEMC)

View full text Add to dashboard Cite

Three optimized PWM techniques for the overmodulation region of two-level inverter-fed ac drives are introduced and investigated from harmonic loss minimization point of view. The optimization is elaborated for the lowest loss-factor, which is proportional to the square of rms value of current harmonics. The loss-factors are computed for different switching numbers as the function of the motor fundamental voltage. It is shown that, respect to the motor heating and torque ripples, the acceptable drive condition can be guaranteed by relatively low value of inverter switching frequency up to 96-97% of maximal possible motor voltage. Furthermore, it is shown that, the so-called Three vector methods have considerably better performance in the lower part of the overmodulation region than the so-called Two vector method for the same number of switching. The performance of the techniques is compared with other existing PWM techniques. The paper discusses the implementation details of the proposed optimal PWM techniques. The theoretical results are verified by experimental and simulation tests.

show abstract

Improved single-zone overmodulation algorithm for space vector modulated inverters

Cited by 13 publications

References 23 publications

Model Predictive Torque Control for Permanent- Magnet Synchronous Motors Using a Stator- Fixed Harmonic Flux Reference Generator in the Entire Modulation Range

Model Predictive Torque Control for Permanent- Magnet Synchronous Motors Using a Stator- Fixed Harmonic Flux Reference Generator in the Entire Modulation Range

Optimization of PWM for the Overmodulation Region of Two-Level Inverters

Optimization of PWM for overmodulation region of two-level inverters

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