A novel three-phase grid-tied photovoltaic (PV) non-isolated inverter with improved performance owing to common mode current suppression as well as constant common mode voltage is presented in this paper. To compensate unexpected oscillations in stray capacitor voltage, three additional diodes are used with the full bridge circuit of traditional B6 inverter. Therefore, using total six insulated gate bipolar transistors (IGBTs) and three diodes, the proposed inverter eliminates the pitfalls of conventional grid-tied non-isolated PV inverters. Unipolar sinusoidal pulse width modulation (SPWM) method is utilized here in order to control the power switches of the presented inverter. Because of less voltage oscillations in stray capacitor, common mode voltage is hold to be constant. Consequently, extra leakage current flow is reduced significantly. The peak leakage current is found 8.184 mA and 5.132 mA RMS leakage current is recorded. The total harmonic distortions (THDs) of phase voltage
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Sonrai Memory Limited filed a complaint on Monday in the Western District of Texas against Dell Technologies Inc. alleging that the defendant infringed its patents-in-suit for products such as laptops, desktop computers, and servers.
The patents-in-suit are United States Patent Nos. 6,724,241 (the ’241 patent); 6,920,527 (the ’527 patent); and 7,436,232 (the ’232 patent), which “relate to improvements in charge pump circuits,” “portable memory devices with both volatile and non-volatile memory,” and “regenerative clock repeating.”
The plaintiff claimed that Dell’s purportedly infringing products include laptops, desktop computers, and servers “with SanDisk/Toshiba 64L 3D NAND flash chips.” They alleged the products infringe the ’241 patent, entitled “Variable Charge Pump Circuit with Dynamic Load.” According to the claim chart, claim 1 of the ’241 patent states: “A charge pump circuit for generating a charge pump v
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Application Area: High pressure liquid chromotography The delivery system of this autosampler is unmatched in terms of cleanliness and robustness. The autosampler contains dynamic washing steps that sets it apart from other autosamplers, ensuring no carryover or cross contamination. Versatile to hold plates and vials, this thermostat autosampler enables the user to add on features, making it customizable to your lab s needs. Modules such as agitators, barcode readers, centrifuges, even diluters can be added on to the rail, making it the ultimate Lego-like autosampler.
Review date: 27 Jan 2021 |
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