FB-ZCS DC-DC Converter with Adaptive Resonant Energy Using Phase-Shift Frequency Modulation

2018 ◽  
Author(s):  
Rohit Suryadevara ◽  
Leila Parsa
Keyword(s):  
Phase Shift ◽  
Frequency Modulation ◽  
Resonant Energy ◽  
Shift Frequency

Application of the Jerk Feedback on the Shaking Table

2014 ◽  
Vol 580-583 ◽  
pp. 1521-1527
Author(s):  
Fang Fang Li ◽  
Jin Bao Ji ◽  
Xiao Jun Li ◽  
Na Li
Keyword(s):  
Phase Shift ◽  
Resonance Frequency ◽  
System Performance ◽  
System Simulation ◽  
Shaking Table ◽  
Theoretical Derivation ◽  
Servo Valve ◽  
Valve System ◽  
Variable Control ◽  
Shift Frequency

For the shaking table system, the 90o phase shift frequency of the servo valve system is close to the oil column resonance frequency, the bandwidth under the influence of servo valve features was so narrow that it cannot meet requirements. Multi-variable control is presented in this paper by introducing the jerk feedback on the basis of the three-variable control. The theoretical derivation and the system simulation show that: the jerk feedback can reduce the oil column resonance frequency, and decrease the influence of the system performance caused by the servo valve characteristics.

Analysis on Bi-Frequency BUCK Circuit Current Ripple Suppressing

2013 ◽  
Vol 834-836 ◽  
pp. 1101-1104
Author(s):  
Jun Li ◽  
Jun Hong Zhang ◽  
Wei Gao
Keyword(s):  
Phase Shift ◽  
Theoretical Analysis ◽  
Frequency Modulation ◽  
High Frequency ◽  
Simulation Studies ◽  
Current Analysis ◽  
Output Current ◽  
Low Frequencies ◽  
Simulation Results ◽  
Current Ripple

Bi-frequency modulation can effectively solve the contradiction between high frequency and efficiency, but it will bring the problem of the current ripple. In this paper, use Buck circuit as the prototype, adopt phase shift parallel technology, make theoretical analysis and simulation studies on the bi-frequency circuit that the high and low frequencies units are operating in a state of continuous inductor current. Analysis and simulation results show that phase shift parallel can effectively inhibit the output current ripple. [email protected] [email protected] [email protected]

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