A CMOS Current-mode DC-DC converter with input and output voltage-independent stability and frequency characteristics utilizing a quadratic slope compensation scheme

2007 ◽  
Author(s):  
Kiyokazu Umimura ◽  
Hiroki Sakurai ◽  
Yasuhiro Sugimoto
Keyword(s):  
Output Voltage ◽  
Current Mode ◽  
Frequency Characteristics ◽  
Compensation Scheme ◽  
Input And Output ◽  
Slope Compensation

MONITORING OF ELECTRICAL AND THERMAL OUTPUT ENERGY OF SOLAR PHOTOELECTRICAL THERMAL INSTALLATION

2021 ◽  
Author(s):  
E. N. Kotlikov ◽  
◽  
M. A. Saliev ◽  
Yu. A. Novikova ◽  
◽  
...  
Keyword(s):  
Experimental Model ◽  
Output Voltage ◽  
Continuous Monitoring ◽  
Output Energy ◽  
Charge Current ◽  
Thermal Output ◽  
Input And Output ◽  
Electrical Part ◽  
Thermal Part

This work describes the experimental model of integrated photoelectrical thermal (PVT) air collector with informative system for controlling and ruling based on microcomputer. A method of determining efficiency both electrical and thermal part of installation by the data of continuous monitoring parameters: output voltage, the charge current, the temperature of air on input and output of collector is proposed. The efficiency of electrical part (8%) and thermal part (50%) of PVT installation were determined for mart 2019.

scholarly journals Low Power Photo-Voltaic Harvesting Matrix Based Boost DC–DC Converter with Recycled and Synchro-Recycled Scheme

2020 ◽  
Vol 10 (4) ◽  
pp. 39
Author(s):  
Maziar Rastmanesh ◽  
Ezz El-Masry ◽  
Kamal El-Sankary
Keyword(s):  
Low Power ◽  
Output Voltage ◽  
Current Mode ◽  
Boost Converter ◽  
Boost Converters ◽  
Continuous Current ◽  
Photo Voltaic ◽  
Continuous Current Mode ◽  
Conversion Efficiencies ◽  
Voltage Conversion

Photo-voltaic (PV) power harvest can have decent efficiency when dealing with high power. When operating with a DC–DC boost converter during the low-power harvest, its efficiency and output voltage are degraded due to excessive losses in the converter components. The objective of this paper is to present a systematic approach to designing an efficient low-power photo-voltaic harvesting topology with an improved efficiency and output voltage. The proposed topology uses a boost converter with and extra inductor in recycled and synchro-recycled techniques in continuous current mode (CCM). By exploiting the non-linearity of the PV cell, it reduces the power loss and using the current stored in the second inductor, it enhances the output voltage and output power simultaneously. Further, by utilizing the Metal Oxide Silicon Field Effect Transistor’s (MOSFET) body diode as a switch, it maintains a minimum hardware, and introduces a negligible impact on the reliability. The test results of the proposed boost converters show that it achieves a decent power and output voltage. Theoretical and experimental results of the proposed topologies with a tested prototype are presented along with a strategy to maximize power and voltage conversion efficiencies and output voltage.

scholarly journals Hybrid Current-Mode Control of PSFB Converter to Compensate Slew Interval and Prevent Magnetic Saturation of Transformers

Electronics ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 1395 ◽  
Author(s):  
Jae-Hak Ko ◽  
Seung-Woo Baek ◽  
Kang-Mun Lee ◽  
Hag-Wone Kim ◽  
Kwan-Yul Cho ◽  
...  
Keyword(s):  
Current Mode ◽  
Current Mode Control ◽  
Mode Control ◽  
Switching Losses ◽  
Dc Power ◽  
Compensation Methods ◽  
Slope Compensation ◽  
Power Stage ◽  
Control Response ◽  
In Series

This paper proposes a newly developed hybrid current-mode control (HCMC) method for phase-shifted full-bridge (PSFB) converters. Generally, PSFB converters have been widely used in various DC-DC power applications owing to their ease of control and low switching losses. However, the transformer can be saturated by volt-second imbalance of the magnetizing inductance. Therefore, a blocking capacitor can be used in series with the transformer, or peak current-mode control methods with slope compensation can be applied, to prevent transformer saturation. However, blocking capacitors increase the material cost and make the power stage bulky. Moreover, the overcompensation by slope compensation methods delays the control response. This paper proposes a hybrid current-mode control (HCMC) for PSFB converters to solve these problems. A blocking capacitor and slope compensation are not required in the proposed HCMC method for PSFB converters. The proposed HCMC method has no transformer saturation and output response delay, and the efficacy of this method has been verified through simulations and experiments.

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