scholarly journals Experimental Investigation of the LTC5553 Microcircuit in the Frequency Multiplication Mode

2018 ◽  
Vol 7 (3.13) ◽  
pp. 41
Author(s):  
K Y. Rumyantsev ◽  
A N. Zikiy ◽  
P N. Zlaman ◽  
S O. Mamchenko
Keyword(s):  
Experimental Study ◽  
Experimental Investigation ◽  
Transmission Coefficient ◽  
Power Factor ◽  
Second Harmonic ◽  
Input Power ◽  
Frequency Multiplier ◽  
Transmission Power ◽  
Frequency Multiplication ◽  
Fourth Harmonic

Mixer chips have wide functionality, which is not always declared by the manufacturer. The purpose of the experimental study is to prove the possibility of implementing a frequency multiplier based on the mixer chip LTC5553. An experimental study of the LTC5553 chip in the mode of frequency multiplication was performed 2, 4 and 6 times. The second harmonic transmission coefficient is not less than minus 17.25 dB, for the fourth harmonic not less than minus 35 dB, for the sixth harmonic - not less than minus 42.67 dB. The transmission power factor depends little on the input power. Recommendations for modes of using a mixer as a frequency multiplier are given. 

Experimental Investigation and Analysis of Induction Motors Operation under Single-Phasing Condition

2020 ◽  
Vol 8 (2) ◽  
pp. 90-99
Author(s):  
Basim Alsayid
Keyword(s):  
Experimental Investigation ◽  
Induction Motor ◽  
Power Factor ◽  
Induction Motors ◽  
Input Power ◽  
Comparative Approach ◽  
Protective Device ◽  
Three Phase ◽  
Unbalanced Voltage ◽  
Factor Input

A three-phase induction motor will continue to operate when a disturbance of some sort causes the source voltages of the motor to become unbalanced. When an induction motor is operated at unbalanced voltage supply the performance characteristics like efficiency, power factor, input power, output power and losses are affected.  The single-phasing occurs when one phase fails as a result of a fuse blowing, protective device opening on one phase of the motor, open phase on one terminal of the motor or other causes. This paper will analyze the operation of a 3-phase induction motor under normal balanced source voltages first, then under single phasing experimentally in order to follow a comparative approach.

Experimental Investigation and Analysis of Induction Motors Operation under Single-Phasing Condition

2020 ◽  
Vol 8 (2) ◽  
pp. 90-99
Author(s):  
Basim Alsayid
Keyword(s):  
Experimental Investigation ◽  
Induction Motor ◽  
Power Factor ◽  
Induction Motors ◽  
Input Power ◽  
Comparative Approach ◽  
Protective Device ◽  
Three Phase ◽  
Unbalanced Voltage ◽  
Factor Input

A three-phase induction motor will continue to operate when a disturbance of some sort causes the source voltages of the motor to become unbalanced. When an induction motor is operated at unbalanced voltage supply the performance characteristics like efficiency, power factor, input power, output power and losses are affected.  The single-phasing occurs when one phase fails as a result of a fuse blowing, protective device opening on one phase of the motor, open phase on one terminal of the motor or other causes. This paper will analyze the operation of a 3-phase induction motor under normal balanced source voltages first, then under single phasing experimentally in order to follow a comparative approach.

An Experimental Investigation of the Efficacy of Lawyers' Letters

2002 ◽  
Vol 21 (1) ◽  
pp. 79-93 ◽  
Author(s):  
Jack L. Krogstad ◽  
Mark H. Taylor ◽  
Maribeth J. Stock
Keyword(s):  
Experimental Study ◽  
Experimental Investigation ◽  
Lower Bound ◽  
Financial Statements ◽  
Law Students ◽  
Potential Loss

This experimental study investigates the efficacy of lawyers' letters in providing auditors with corroborating evidence about litigation contingencies. Fifty second- and third-year law students indicate their willingness to provide auditors with estimates of the likelihoods of unfavorable outcomes and potential damages for two realistic litigation cases. The findings indicate that (1) the potential loss of attorney-client privilege and (2) likelihoods of unfavorable litigation outcomes that approach auditors' lower bound for accrual both may inhibit lawyers' responses to auditors. Overall, these findings raise doubts about the efficacy of this widely utilized auditing procedure and lead to concerns about whether litigation contingencies and corresponding losses may be underreported in financial statements.

scholarly journals Spectral Broadening in a Continuously Pumped Singly Resonant Second-Harmonic Cavity

2021 ◽  
Vol 11 (15) ◽  
pp. 7122
Author(s):  
Simona Mosca ◽  
Tobias Hansson ◽  
Maria Parisi
Keyword(s):  
Continuous Wave ◽  
Frequency Comb ◽  
Second Harmonic ◽  
Input Power ◽  
Second Order ◽  
Optical Frequency ◽  
Frequency Combs ◽  
Research Areas ◽  
Mixed Regime ◽  
Wide Range

Optical frequency comb synthesizers with a wide spectral range are an essential tool for many research areas such as spectroscopy, precision metrology, optical communication, and sensing. Recent studies have demonstrated the direct generation of frequency combs, via second-order processes, that are centered on two different spectral regions separated by an octave. Here, we present the capability of optical quadratic frequency combs for broad-bandwidth spectral emission in unexplored regimes. We consider comb formation under phase-matched conditions in a continuous-wave pumped singly resonant second-harmonic cavity, with large intracavity power and control of the detuning over several cavity line widths. The spectral analysis reveals quite distinctive sidebands that arise far away from the pump, singularly or in a mixed regime together with narrowband frequency combs. Notably, by increasing the input power, the optical frequency lines evolve into widely spaced frequency clusters, and at maximum power, they appear in a wavelength range spanning up to 100 nm. The obtained results demonstrate the power of second-order nonlinearities for direct comb production within a wide range of pump wavelengths.

scholarly journals On the Optimization of Electrical Water Heaters: Modelling Simulations and Experimentation

Energies ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3912
Author(s):  
Wassim Salameh ◽  
Jalal Faraj ◽  
Elias Harika ◽  
Rabih Murr ◽  
Mahmoud Khaled
Keyword(s):  
Experimental Study ◽  
Energy Consumption ◽  
Parametric Study ◽  
Thermal Model ◽  
Energy Savings ◽  
Input Power ◽  
Energy Crisis ◽  
Water Heaters ◽  
World Energy ◽  
Electrical Components

In the context of a world energy crisis, the only solution to control the situation is in the management of energy. One of the most important management keys is the optimization of electrical components. This article presents a complete numerical and experimental study aiming for the optimization of electrical water heaters for household use. The optimization conceives the minimization of energy consumption simultaneously with the minimization of time to heat water. Firstly, a thermal model well adapted for the case of heaters is constructed and validated experimentally and then a parametric study is conducted covering all the input power, the volume and the external area of the heater. Results are promising, showing significant energy savings are possible with an optimum setting of these parameters, thus presenting a firm tool for the optimization of heaters.

Input power factor control of AC-DC series resonant DC link converter using PID operation

1996 ◽  
Vol 11 (1) ◽  
pp. 43-48 ◽  
Author(s):  
H. Soebagia ◽  
M. Yoshida ◽  
Y. Murai ◽  
T.A. Lipo
Keyword(s):  
Power Factor ◽  
Input Power ◽  
Series Resonant ◽  
Power Factor Control

Second Harmonic Generation in Poled Polymers

1995 ◽  
Vol 413 ◽  
Author(s):  
G. I. Stegeman ◽  
M. JÄger ◽  
A. Otomo ◽  
W. Brinker ◽  
S. Yilmaz ◽  
...  
Keyword(s):  
Nonlinear Optics ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Organic Materials ◽  
Second Harmonic ◽  
Input Power ◽  
Inorganic Materials ◽  
Channel Waveguides ◽  
Harmonic Conversion ◽  
Conversion Efficiencies

ABSTRACTThe phenomenon of second harmonic generation has been studied from the earliest days of nonlinear optics.[l] To date the most impressive results in terms of conversion efficiency for as low an input power as possible have been obtained in channel waveguides made from inorganic materials.[2] However, when their second order nonlinearities (10s of pm/V) are compared with those of organic materials (10s → 100s pmn/V), it is clear that organic materials should eventually produce much better harmonic conversion efficiencies. [3]

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