نتایج جستجو برای: line ups
تعداد نتایج: 424944 فیلتر نتایج به سال:
A constant current charging control method for charger is proposed in this paper. The basic idea is to maintain constant current charging by limiting the duty cycle of charger. Based upon the proposed constant current charging technique, a digital-controlled charger is designed and control method in software. The proposed digitalcontrolled charger has been applied to an on-line UPS prototype is...
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This application note is intended as an addendum to the Design Reference Manual DRM064 ([1]) and describes implementation of an average current mode control of Power Factor Correction (PFC) on MC9S12E128. The DRM064 deals with the design of a Single Phase On-Line UPS using an MC9S12E128. It includes control of a power factor correction (PFC), a DC/DC step up converter, a battery charger, and an...
Loss of protein quality control by the ubiquitin-proteasome system (UPS) during aging is one of the processes putatively contributing to cellular stress and Alzheimer's disease (AD) pathogenesis. Recently, pooled Genome Wide Association Studies (GWAS), pathway analysis and proteomics identified protein ubiquitination as one of the key modulators of AD. Mutations in ubiquitin B mRNA that result ...
A control approach for three-phase four-leg LC-filtered voltage source inverters (VSIs) is proposed an uninterruptible power supply (UPS) application. filter inductor in the fourth (neutral) leg of VSI considered to enhance output quality when feeding different types loads such a system. The based on modelling UPS system dq0 synchronous frame. First, switching functions inverter under study are...
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