Generalized Mathematical Model of Homodyne Frequency Conversion Method under a Periodic Variation in Sounding Signal Phase Shift

2007 ◽  
Vol 66 (12) ◽  
pp. 1057-1065 ◽  
Author(s):  
Yu. B. Gimpilevich ◽  
I. B. Shirokov
Keyword(s):  
Mathematical Model ◽  
Phase Shift ◽  
Frequency Conversion ◽  
Periodic Variation ◽  
Signal Phase ◽  
Conversion Method

scholarly journals Resonance overvoltage control algorithms in long cable frequency conversion drive based on discrete mathematics

Open Physics ◽  
2020 ◽  
Vol 18 (1) ◽  
pp. 408-418
Author(s):  
Yonghong Deng ◽  
Quanzhu Zhang
Keyword(s):  
Mathematical Model ◽  
Control Strategy ◽  
Frequency Conversion ◽  
Balance Control ◽  
Frequency Converter ◽  
Active Power ◽  
Drive System ◽  
Discrete Mathematics ◽  
Power Controller ◽  
Capacitor Voltage

AbstractIn order to solve the problem that the long cable variable voltage and variable frequency (VVVF) system does not adopt an effective capacitor voltage sharing control method, resulting in a poor effect of resonance overvoltage control, the resonance overvoltage control algorithm of the long cable VVVF system based on discrete mathematics is studied. First, the long cable frequency conversion drive system is established. In order to ensure voltage loss in the range of motor requirements, a frequency converter–cable–motor (ICM) system connection mode is used to maintain the system operation. Based on the research of the capacitor voltage balance control strategy of a long cable frequency conversion drive system, the discrete mathematical model of the AC side of the ICM system is established by using this control strategy. The improved constant active power controller is obtained by establishing the mathematical model, and the resonant overvoltage in a long cable frequency conversion drive is realized by using the constant active power controller. The experimental results show that the algorithm can effectively control the resonance overvoltage phenomenon in the long cable frequency control system, and the control accuracy is over 97%. It has good performance and can be applied in practice.

scholarly journals Rigorous intensity and phase-shift manipulation in optical frequency conversion

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Bo Yang ◽  
Yang-Yang Yue ◽  
Rong-er Lu ◽  
Xu-Hao Hong ◽  
Chao Zhang ◽  
...  
Keyword(s):  
Phase Shift ◽  
Frequency Conversion ◽  
Optical Frequency ◽  
Optical Frequency Conversion

Selecting the optimal anti-aliasing filter for multichannel biosignal acquisition intended for inter-signal phase shift analysis

2014 ◽  
Vol 36 (1) ◽  
pp. N23-N34 ◽  
Author(s):  
Róbert Keresnyei ◽  
Péter Megyeri ◽  
Zoltán Zidarics ◽  
László Hejjel
Keyword(s):  
Phase Shift ◽  
Phase Shift Analysis ◽  
Signal Phase ◽  
Shift Analysis

Nonlinear Phase-Shift Cancellation by Taking the Geometric Mean of WDM-Signal Phase-Conjugate Pair

2018 ◽  
Vol E101.B (8) ◽  
pp. 1845-1852
Author(s):  
Takahisa KODAMA ◽  
Akira MIZUTORI ◽  
Takayuki KOBAYASHI ◽  
Takayuki MIZUNO ◽  
Masafumi KOGA
Keyword(s):  
Phase Shift ◽  
Geometric Mean ◽  
Signal Phase ◽  
Conjugate Pair ◽  
Nonlinear Phase Shift ◽  
Phase Conjugate ◽  
Nonlinear Phase

Research about Dielectric Loss Detector Based on Frequency Conversion Method

2013 ◽  
Vol 380-384 ◽  
pp. 3179-3183
Author(s):  
Guo Hua Hua ◽  
Zhong Ru Shen
Keyword(s):  
Dielectric Loss ◽  
Harmonic Analysis ◽  
Loss Factor ◽  
Frequency Conversion ◽  
Dielectric Loss Factor ◽  
Loss Measurement ◽  
Conversion Method ◽  
Equivalent Capacitance

This paper adopts frequency conversion method to avoid same frequency interfered, and deduces the dielectric loss factor and the equivalent capacitance using the harmonic analysis. Based on this theory, a DSP+FPGA detecting platform was built. At last, utilizing capacitance and resistance to simulate as dielectric loss measurement sample, the experiment was conducted.

Photonic microwave frequency conversion scheme with flexible phase shift

2018 ◽  
Vol 66 (2) ◽  
pp. 183-191 ◽  
Author(s):  
Tao Lin ◽  
Shanghong Zhao ◽  
Zihang Zhu ◽  
Xuan Li ◽  
Kun Qu ◽  
...  
Keyword(s):  
Phase Shift ◽  
Frequency Conversion ◽  
Microwave Frequency ◽  
Conversion Scheme

Improvement on Zero Nonlinear Compensation of Time Division Multiplier

2014 ◽  
Vol 687-691 ◽  
pp. 3132-3136
Author(s):  
Wu Zhu ◽  
Juan Juan Yu
Keyword(s):  
Compensation Effect ◽  
Frequency Conversion ◽  
Zero Point ◽  
Power Measurement ◽  
Test Results ◽  
Conversion Method ◽  
Voltage Frequency ◽  
Nonlinear Compensation ◽  
Voltage Feedback ◽  
Time Division

In order to overcome the power measurement error caused by switch leakage of time division multiplier, in this paper, the mechanism of switch leakage of no-beats time division multiplier was analyzed, and switch leak was tested. On the basis of this, power compensation circuit on zero point correction based on voltage feedback and voltage frequency conversion method is designed, subsequently the compensation effect was tested respectively. Test results show that the zero compensation method based on voltage frequency conversion method is better, the zero error decreased to 0.0022%, the accuracy of the power measurement was improved.

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