Class E low dv/dt synchronous rectifier with controlled duty ratio and output voltage

1991 ◽  
Vol 38 (10) ◽  
pp. 1165-1172 ◽  
Author(s):  
M.K. Kazimierczuk ◽  
K. Puczko
Keyword(s):  
Output Voltage ◽  
Duty Ratio ◽  
Synchronous Rectifier ◽  
Class E

scholarly journals Improved wireless power pickup efficiency using CMOS synchronous rectifier with embedded shorting control

2017 ◽  
Vol 4 (1) ◽  
pp. 61-68 ◽  
Author(s):  
Robert Gallichan ◽  
Ho Yan (Alex) Leung ◽  
David M. Budgett ◽  
Aiguo Patrick Hu ◽  
Daniel McCormick
Keyword(s):  
Output Voltage ◽  
Magnetic Coupling ◽  
Voltage Regulation ◽  
Operating Conditions ◽  
Duty Ratio ◽  
Power Transfer ◽  
Wireless Power ◽  
Coupling Conditions ◽  
Synchronous Rectifier ◽  
Power Capability

In this work, a shorting control (SC) scheme is integrated into a complementary metal-oxide-semiconductor (CMOS) synchronous rectifier for the output voltage regulation of a wireless power supply. The rectifier is designed to operate in a parallel tuned pickup with a 500 mW output power capability for biomedical implants. Without any additional components, the proposed SC method enables the power pickup to operate with high efficiency under variable coupling conditions while maintaining the required load power to keep the output voltage constant. Desired operating conditions are achieved with increased power transfer capability at weak magnetic coupling conditions and higher power efficiency at strong coupling. A novel derivation describes the change in efficiency with SC duty ratio. Experimental validation is completed with an original custom CMOS integrated rectifier with embedded SC. It is demonstrated that the proposed SC method can increase the overall secondary pickup power transfer efficiency by 14% as the magnetic coupling increases to the stronger end.

Design of High Frequency Class E Inverter With Adjustable Output Voltage

2021 ◽  
Author(s):  
Chang Liu ◽  
Yueshi Guan ◽  
Yuhui Wang ◽  
Yijie Wang ◽  
Dianguo Xu
Keyword(s):  
High Frequency ◽  
Output Voltage ◽  
Class E

scholarly journals Mathematical modeling and control of wind energy electric conversion system feeding standalone load

2017 ◽  
Vol 7 (1.2) ◽  
pp. 47
Author(s):  
N K Rayaguru ◽  
N. Poornachandra Rao ◽  
K. Navin Sam ◽  
Sunil Kumar Thakur
Keyword(s):  
Wind Energy ◽  
State Space ◽  
Output Voltage ◽  
State Space Model ◽  
Synchronous Generator ◽  
Boost Converter ◽  
Duty Ratio ◽  
Space Model ◽  
Conversion System ◽  
Constant Output

In this paper, state space model of the complete Wind Energy Electric Conversion System (WEECS) comprising of wind turbine, Permanent Magnet Synchronous Generator (PMSG), uncontrolled rectifier, DC-DC boost converter, and SPWM inverter feeding a standalone load has been formulated. The derived state space model is then simulated using Matlab/Simulink to test the model. As the standalone three phase load connected to the inverter demands constant output voltage irrespective of intermittent wind pattern, a PI controller is used to control the duty ratio of DC-DC boost converter to maintain constant output voltage at the inverter end.

scholarly journals Algorithim to control output voltage and reduce the ripple of input current in quasi switched boost inverter

2021 ◽  
Vol 4 (2) ◽  
pp. first
Author(s):  
Xuan-Vinh Le ◽  
Duc-Minh Nguyen ◽  
Viet-Anh Truong ◽  
Thanh-Hai Quach
Keyword(s):  
Pulse Width ◽  
Output Voltage ◽  
Pulse Width Modulation ◽  
Short Circuit ◽  
Modulation Index ◽  
Duty Ratio ◽  
Electrical Systems ◽  
Boost Factor ◽  
Control Output ◽  
Current Ripple

In recent years, the quasi -switched boost inverter uses widely in electrical systems. This paper proposes a method to control the AC output voltage and reduce the current ripple of the booster inductor in the quasi-switched boost inverter (QSBI). The proposed technique base on carrier pulse width modulation with two triangles with phase shifts 90◦. This technique uses the offset function to expand the modulation index and the algorithm for output voltage stabilization based on the adjustment of the boost ratio. The modulation index expansion will reduce the stress voltage on the switches by an average of 16.5% under the simulated conditions. The boost factor base on the short circuit time on the DC / DC booster and the inverter on the zero vectors. So, the duty ratio (of the boost DC / DC) can reduce by the short-circuit pulses that insert in the position of zero vectors, so the inverter is responsible for both boosting and inverting. The combination helps to reduce the current ripple on the boost inductor. Besides that, reducing the short-circuit ratio of DC / DC booster will also reduce the capacity of the booster switch and thereby reduce the production cost. The analysis clarifies the proposed technique. Simulations and experiments evaluate the proposed method.

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