A new approach for analyzing the effect of non-ideal power supply on a constant current underwater cabled system

2020 ◽  
Vol 21 (4) ◽  
pp. 604-614
Author(s):  
Yu-jia Zang ◽  
Yan-hu Chen ◽  
Can-jun Yang ◽  
De-jun Li ◽  
Ze-jian Chen ◽  
...  
Keyword(s):  
Power Supply ◽  
Constant Current ◽  
New Approach

Design and Implementation of Mid-Frequency Magnetron Sputtering Power Supply Based on TL494 and MCU

2013 ◽  
Vol 709 ◽  
pp. 408-412
Author(s):  
Yan Ling Zhao ◽  
Rong Xing Liu
Keyword(s):  
Magnetron Sputtering ◽  
Power Supply ◽  
Current Mode ◽  
Voltage Regulation ◽  
Control Circuit ◽  
Constant Current ◽  
Loop Control ◽  
Pulse Width Modulator ◽  
Digital Pulse ◽  
The Stability

Abstract. A mid-frequency magnetron sputtering (MFMS) power supply based on TL494 and MCU was introduced. A Buck Chopper and full bridge inverter were applied to the main circuit. The PWM controller TL494 was used in the Buck voltage-regulation control circuit to realize closed loop control. The drive signal of the IGBT in full bridge inverter was based on precise digital pulse width modulator (DPWM) signal produced by the MCU M30290. The DPWM can be set by potentiometer so the power supply can output the square wave with adjustable frequency and duty cycle. The power supply was operated in constant current mode. For micro or strong arcing of the target, different safeguards were adopted by the control circuit. At last, the system test and experimental results show that the stability, reliability and tuning range of the MFMS power supply can meet the requirements of the magnetron sputtering coating.

A multipurpose power supply for constant current, constant voltage, and constant power applications

2021 ◽  
Vol 92 (11) ◽  
pp. 114706
Author(s):  
Geethanjali Pandeswara ◽  
Naresh Pasula ◽  
Geshma Kumari R
Keyword(s):  
Power Supply ◽  
Constant Current ◽  
Constant Voltage ◽  
Constant Power

OLED degradation described by using a time-dependent local relaxation model

2005 ◽  
Vol 871 ◽  
Author(s):  
Benoît Racine ◽  
Christophe Féry ◽  
Armand Bettinelli ◽  
Henri Doyeux ◽  
Salvatore Ciná
Keyword(s):  
Constant Current ◽  
New Approach ◽  
Single Mechanism ◽  
Low Luminance ◽  
Driving Condition ◽  
Local Relaxation ◽  
Almost All ◽  
High Degree ◽  
Stretched Exponential Decay ◽  
Main Relaxation

AbstractThe main mechanisms responsible for the luminance degradation in OLEDs driven under constant current has not yet been identified. In this paper we propose a new approach to describe the intrinsic mechanisms involved in the OLED aging. We will first show that a stretched exponential decay can be used to fit almost all the luminance vs time curves obtained under different driving conditions. In this way we are able to prove that they can all be described by employing a single free parameter model.By using as an approach based on local relaxation events, we will demonstrate that a single mechanism is responsible for the dominant aging process. Furthermore, we will demonstrate that the main relaxation event is the annihilation of one emissive center.We will then use our model to fit all the experimental data measured under different driving condition, and show that by carefully fitting the accelerated luminance lifetime-curves, we can extrapolate the low-luminance lifetime needed for real display applications, with a high degree of accuracy.

Analysis and design of a higher-order T-type resonant convertor as a constant-current power supply

2011 ◽  
Vol 4 (1) ◽  
pp. 72 ◽  
Author(s):  
M. Borage ◽  
K.V. Nagesh ◽  
M.S. Bhatia ◽  
S. Tiwari
Keyword(s):  
Power Supply ◽  
Higher Order ◽  
Constant Current ◽  
Analysis And Design
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