Harmonic analysis of the output voltage of a third-harmonic-injected inverter for LSM drives

2007 ◽  
Vol 160 (1) ◽  
pp. 71-78
Author(s):  
Hidenori Shigeeda ◽  
Akinobu Okui ◽  
Hirofumi Akagi
Keyword(s):  
Harmonic Analysis ◽  
Output Voltage ◽  
Third Harmonic

scholarly journals Harmonic Analysis of the Output Voltage of a Third-Harmonic-Injected Inverter for LSM Drives

2005 ◽  
Vol 125 (2) ◽  
pp. 133-139 ◽  
Author(s):  
Hidenori Shigeeda ◽  
Akinobu Okui ◽  
Hirofumi Akagi
Keyword(s):  
Harmonic Analysis ◽  
Output Voltage ◽  
Third Harmonic

scholarly journals Aerodynamic Analysis of Cup Anemometers Performance: The Stationary Harmonic Response

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
Santiago Pindado ◽  
Javier Cubas ◽  
Ángel Sanz-Andrés
Keyword(s):  
Transfer Function ◽  
Harmonic Analysis ◽  
Rotational Speed ◽  
Shape Parameters ◽  
New Approach ◽  
Third Harmonic ◽  
Harmonic Response ◽  
The Third ◽  
Harmonic Term ◽  
Cup Anemometer

The effect of cup anemometer shape parameters, such as the cups’ shape, their size, and their center rotation radius, was experimentally analyzed. This analysis was based on both the calibration constants of the transfer function and the most important harmonic term of the rotor’s movement, which due to the cup anemometer design is the third one. This harmonic analysis represents a new approach to study cup anemometer performances. The results clearly showed a good correlation between the average rotational speed of the anemometer’s rotor and the mentioned third harmonic term of its movement.

Structure Optimization of Piezoelectric Micromachined Modal Gyroscope

2011 ◽  
Vol 130-134 ◽  
pp. 3377-3380
Author(s):  
Xiao Jun Hu ◽  
Xiao Sheng Wu ◽  
Zheng Wang ◽  
Wen Yuan Chen ◽  
Wei Ping Zhang
Keyword(s):  
Angular Velocity ◽  
Harmonic Analysis ◽  
Coriolis Force ◽  
Output Voltage ◽  
Working Condition ◽  
Operation Mode ◽  
Structure Optimization ◽  
Mass Spring ◽  
Quantitative Indicators ◽  
Device Size

This paper reports a novel kind of solid micro-gyroscope, which is called piezoelectric micromachined modal gyroscope (PMMG). PMMG has large stiffness and robust resistance to shake and strike because there is no evident mass-spring component in its structure. This work focused on quantitative optimization of the gyroscope, which is still blank for such gyroscope. A set of quantitative indicators were developed to optimize the operation mode and corresponding device size was obtained. By FEM, the harmonic analysis was conducted to find the way to efficiently actuate the operation mode needed. At last, the Coriolis analysis was conducted to show the relation between angular velocity and differential output voltage by the Coriolis force under working condition.

Harmonic Analysis of a Five Level Cascaded Inverter Under a New Modulation Scheme

2012 ◽  
Author(s):  
J. Aziz ◽  
Z. Salam
Keyword(s):  
Harmonic Analysis ◽  
Key Words ◽  
Analytical Method ◽  
Output Voltage ◽  
Fourier Coefficients ◽  
Modulation Scheme ◽  
Test Rig ◽  
Single Carrier ◽  
Mathematical Equations

Kertas kerja ini mengusulkan satu kaedah analitikal untuk meramalkan magnitud dan kedudukan harmonik voltan keluaran penyongsang lima tahap. Penyongsang tersebut telah digunakan untuk melaksanakan satu skim pemodulatan baru yang menggunakan beberapa isyarat memodulat berserta isyarat pembawa tunggal. Seterusnya daripada skim pemodulatan tersebut, persamaan matematik yang dapat menentukan pensuisan PWM diterbitkan. Untuk memastikan kelebihan skim pemodulatan tersebut, analisis harmonik untuk mendapatkan pekali Fourier diterbitkan dan dikira menggunakan MATLAB. Harmonik voltan keluaran yang diukur dan dikira seterusnya dibandingkan dan dibincangkan. Kata kunci: Analisis harmonik; penyongsang bertahap This paper proposes an analytical method to predict the incidence and magnitude of harmonics of the output voltage of a five–level cascaded inverter. The cascaded inverter is subjected to a new modulation scheme, which uses multiple modulating signals with a single carrier. From the modulation scheme, mathematical equations that define the PWM switching instants are derived. In order to justify the merits of the proposed modulation scheme, harmonic analysis for the Fourier coefficients is outlined and calculated using MATLAB. An experimental five–level cascaded inverter test–rig is built and the new modulation scheme is implemented. The calculated and measured harmonics of the output voltage are compared and discussed. Key words: Harmonic analysis; cascaded inverter

scholarly journals Multicarrier PWM Strategies for Hybrid Symmetrical Multilevel Inverter with Reduced Switch Count

2020 ◽  
Vol 9 (5) ◽  
pp. 860-866
Keyword(s):  
Electromagnetic Interference ◽  
Output Voltage ◽  
Pulse Width Modulation ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
Total Harmonic Distortion ◽  
Switching Frequency ◽  
Third Harmonic ◽  
Multilevel Inverters ◽  
High Switching Frequency

Multilevel inverters are widely used for high power and high voltage applications. The performance of multilevel inverters are superior to conventional two level inverters in terms of reduced total harmonic distortion, higher dc link voltages, lower electromagnetic interference and increased quality in the output voltage waveform. This paper presents a single phase hybrid eleven level multilevel inverter topology with reduced switch count to compensate the above mentioned disadvantages. This paper also presents various high switching frequency based multi carrier pulse width modulation strategies such as Phase Disposition PWM Strategy (PDPWM), Phase Opposition and Disposition PWM Strategy (PODPWM), Alternate Phase opposition Disposition PWM (APODPWM), Carrier Overlapping PWM (COPWM), Variable frequency carrier PWM (VFPWM), Third Harmonic Injection PWM (TFIPWM) applied to the proposed eleven level multilevel inverter and is analyzed for RL load. FFT analysis is carried out and total harmonic distortion, fundamental output voltage are calculated. Simulation is carried out in MATLAB/SMULINK.

Harmonic Analysis of a Triductor — Part 1

1975 ◽  
Vol 12 (2) ◽  
pp. 129-134
Author(s):  
I. K. Puri
Keyword(s):  
Harmonic Analysis ◽  
Wave Form ◽  
Third Harmonic ◽  
The Third ◽  
Control Current ◽  
Current Wave ◽  
Secondary Voltage ◽  
Transformer Core ◽  
Secondary Power

The third harmonic present in the voltage or current wave-form of a transformer is utilized for the heating of induction furnaces. The secondary power at 150 cycles is controlled with d.c. magnetization of the transformer core. The circuit used shows a different type of B-H curve. This paper explains how this magnetizing curve gives the variation of secondary voltage by changing d.c. control current.

scholarly journals First critical field measurements of superconducting films by third harmonic analysis

2009 ◽  
Vol 106 (5) ◽  
pp. 053903 ◽  
Author(s):  
G. Lamura ◽  
M. Aurino ◽  
A. Andreone ◽  
J.-C. Villégier
Keyword(s):  
Harmonic Analysis ◽  
Critical Field ◽  
Field Measurements ◽  
Superconducting Films ◽  
Third Harmonic
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