Journal ArticleDOI
A novel overmodulation technique for space vector PWM inverters
Dong-Choon Lee,G-Myoung Lee +1 more
- Vol. 13, Iss: 6, pp 1144-1151
TLDR
In this article, a novel overmodulation technique for space-vector pulsewidth modulation (PWM) inverters is proposed, which produces a linear relationship between the output voltage and the modulation index up to six-step operation.Abstract:
In this paper, a novel overmodulation technique for space-vector pulsewidth modulation (PWM) inverters is proposed. The overmodulation range is divided into two modes depending on the modulation index (MI). In mode I, the reference angles are derived from the Fourier series expansion of the reference voltage which corresponds to the MI. In mode II, the holding angles are also derived in the same way. The strategy, which is easier to understand graphically, produces a linear relationship between the output voltage and the MI up to six-step operation. The relationship between those angles and the MI can be written in lookup tables or, for real-time implementation, can be piecewise linearized. In addition, harmonic components and total harmonic distortion (THD) of the output voltage are analyzed. When the method is applied to the V/f control of an induction motor, a smooth operation during transition from the linear control range to the six-step mode is demonstrated through experimental results.read more
Citations
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Journal ArticleDOI
A General Space Vector PWM Algorithm for Multilevel Inverters, Including Operation in Overmodulation Range
TL;DR: In this article, a simple space vector pulsewidth modulation algorithm for a multilevel inverter for operation in the overmodulation range is proposed, which easily determines the location of the reference vector and calculates on-times.
Sensorless Control Strategies for Three - Phase PWM Rectifiers
TL;DR: In this article, the authors proposed a harmonic reduction method for nonlinear loads and non-sinusoidal currents, which can be divided as: harmonic reduction of already installed non-linear load; harmonic reduction through linear power electronics load installation; and harmonic reduction via linear power electronic load installation.
Journal ArticleDOI
Carrier-Based Modulation Technique for Matrix Converter
Young-Doo Yoon,Seung-Ki Sul +1 more
TL;DR: In this paper, a carrier-based modulation method for a matrix converter is proposed, which is equivalent to the so-called space vector pulsewidth modulation method, which uses a new point of view to understand the matrix converter modulation method such as the voltage source inverter modulation method.
Journal ArticleDOI
Space vector PWM signal generation for multilevel inverters using only the sampled amplitudes of reference phase voltages
TL;DR: In this article, a pulse width modulation (PWM) scheme for multilevel inverters is proposed, which generates the inverter leg switching times from the sampled reference phase voltage amplitudes and centres the switching times for the middle vectors, in a sampling interval.
Journal ArticleDOI
Six-Step Operation of PMSM With Instantaneous Current Control
TL;DR: A control scheme for the six-step operation of PMSM with enhanced dynamic performance of current control is proposed by collaborative operation of dynamic overmodulation, flux weakening, and a technique for enhancedynamic performance without losing instantaneous current control capability.
References
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Journal ArticleDOI
Analysis and realization of a pulsewidth modulator based on voltage space vectors
TL;DR: In this article, a space vector concept for deriving the switching times for pulsewidth-modulated voltage source inverters is compared with the conventional sinusoidal concept, which results in lower current harmonics and possibly a higher modulation index.
Journal ArticleDOI
Generalized Techniques of Harmonic Elimination and Voltage Control in Thyristor Inverters: Part I--Harmonic Elimination
Hasmukh S. Patel,Richard G. Hoft +1 more
TL;DR: In this article, the theoretical problem of eliminating harmonics in inverter-output waveforms was considered, and numerical techniques were applied to solve the nonlinear equations of the problem on the computer.
Journal ArticleDOI
Direct torque control of induction machines using space vector modulation
TL;DR: In this paper, a direct induction machine torque control method based on predictive, deadbeat control of the torque and flux is presented, where the stator voltage required to cause the torque to be equal to their respective reference values is calculated.
Journal ArticleDOI
Influence of the modulation method on the conduction and switching losses of a PWM converter system
TL;DR: In this paper, the authors explore the dependency of the conduction losses of a bridge leg of a PWM power converter system with a high pulse rate on the shape of the phase modulation functions.
Book
Electrical machines and drives : a space-vector theory approach
TL;DR: The space-vector method Steady-state and transient operation of induction machines and induction motor drives and the synchronous machines and synchronous motor drives.