Novel PWM controlled series-connected current-source inverter drive

Bowes, S.R.; Bullough, R.I.

doi:10.1049/ip-b.1989.0009

Cited by 8 publications

(4 citation statements)

References 11 publications

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“…These fast modelling techniques have been used as a basis for developing very simple closed-form analytic expressions for ~w,(t) and ~PE (t), which when included into the minimisation procedure provide extremely efficient optimal PWM solutions [22). Experimental and CAD results demonstrating the application of these optimal ,,,.-( PWM strategies have been presented in some detail previously for the conventional CSI drive [22,23] (120° conduction), the series connected CSI (SCCSI) drive [24] (180° conduction) consisting of three single-phase bridges in series, and the duplex CSl drive [19,21] consisting of two 120° CSI's in parallel.…”

Section: Regular-sampled Harmonic Elimination Pwmmentioning

confidence: 97%

Novel On-Line Microprocessor Generation of Harmonic Elimination and Minimisation PWM Control Strategies using Regular-Sampling Techniques

Bowes

1991

IETE Journal of Research

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Section: Regular-sampled Harmonic Elimination Pwmmentioning

confidence: 97%

Novel On-Line Microprocessor Generation of Harmonic Elimination and Minimisation PWM Control Strategies using Regular-Sampling Techniques

Bowes

1991

IETE Journal of Research

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“…This indicates how to obtain with the desired ordering from : for those values of let ; and for those values of let . However, the design equations (7) and (8) are nonlinear, so obtaining the desired solution is not so straightforward. In the following sections, this nonlinear system of equations will be closely examined and in Section III, a systematic procedure is given to obtain the solutions.…”

Section: (8)mentioning

confidence: 99%

Solving the optimal PWM problem for single-phase inverters

Czarkowski¹,

Chudnovsky²,

Selesnick³

2002

IEEE Trans. Circuits Syst. I

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In this paper, the basic algebraic properties of the optimal PWM problem for single-phase inverters are revealed. Specifically, it is shown that the nonlinear design equations given by the standard mathematical formulation of the problem can be reformulated, and that the sought solution can be found by computing the roots of a single univariate polynomial ( ), for which algorithms are readily available. Moreover, it is shown that the polynomials ( ) associated with the optimal PWM problem are orthogonal and can therefore be obtained via simple recursions. The reformulation draws upon the Newton identities, Padé approximation theory, and properties of symmetric functions. As a result, fast ( log 2 ) algorithms are derived that provide the exact solution to the optimal PWM problem. For the PWM harmonic elimination problem, explicit formulas are derived that further simplify the algorithm.

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“…To alleviate computational problems, a nonconstrained optimization approach [35] has been proposed. The target function of this new optimization scheme can be written as (10) where are penalty factors. The optimization starting point is obtained by the phase shift method described above.…”

Section: Multilevel Selective Harmonic Eliminationmentioning

confidence: 99%

Multilevel selective harmonic elimination PWM technique in series-connected voltage inverters

Czarkowski

Liu³

et al. 2000

IEEE Trans. on Ind. Applicat.

246

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Selective harmonic elimination pulsewidth modulation (SHEPWM) method is systematically applied for the first time to multilevel series-connected voltage-source PWM inverters. The method is implemented based on optimization techniques. The optimization starting point is obtained using a phase-shift harmonic suppression approach. Another less computationally demanding harmonic suppression technique, called a mirror surplus harmonic method, is proposed for double-cell (five-level) inverters. Theoretical results of both methods are verified by experiments and simulations for a double-cell inverter. Simulation results for a five-cell (11-level) inverter are also presented for the multilevel SHEPWM method. Index Terms-Multilevel inverters, pulsewidth modulation inverters, selective harmonic elimination pulsewidth modulation.

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Novel PWM controlled series-connected current-source inverter drive

Cited by 8 publications

References 11 publications

Novel On-Line Microprocessor Generation of Harmonic Elimination and Minimisation PWM Control Strategies using Regular-Sampling Techniques

Novel On-Line Microprocessor Generation of Harmonic Elimination and Minimisation PWM Control Strategies using Regular-Sampling Techniques

Solving the optimal PWM problem for single-phase inverters

Multilevel selective harmonic elimination PWM technique in series-connected voltage inverters

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