SYSTEMS AND METHODS FOR DC-DC POWER CONVERTER TOPOLOGIES

    公开(公告)号:US20250055378A1

    公开(公告)日:2025-02-13

    申请号:US18231887

    申请日:2023-08-09

    Abstract: Systems and methods for providing DC-DC power converter topologies are described. In at least one embodiment, a DC-DC power converter comprises a primary sub-circuit coupled to a fixed or variable DC input voltage, a first secondary sub-circuit and a second secondary sub-circuit, a transformer isolating the primary sub-circuit from the first and the second secondary sub-circuits, the transformer comprising a predetermined number of turns, the first and the second secondary sub-circuits being configurable in a series mode and a parallel mode by switching configurations of a first, second and third transition switch, and the first and the second secondary sub-circuits providing an output charging voltage and an output charging current for charging an external device.

    Quality Control Materials for Cardiac Troponin Testing

    公开(公告)号:US20250044307A1

    公开(公告)日:2025-02-06

    申请号:US18713411

    申请日:2022-11-25

    Abstract: A method for the preparation of a cardiac troponin quality control sample of a mammal to determine the accuracy and/or precision of a cardiac troponin assay over time is provided. The method comprises the steps of: i) preparing a cardiac troponin concentrate from a pool of biological samples obtained from a population of the mammal having a troponin concentration of greater than 75% of an upper analytical limit of the assay; ii) obtaining a cardiac troponin base material comprising whole blood, plasma or serum of the mammal which is interference-free and disease-free; and iii) combining a quantity of the troponin concentrate with the base material to yield a quality control sample having a target concentration. Quality control samples may be provided in kits which provide a set of samples having particular concentrations which essentially correspond with lower detectable limits of an assay, upper limits of normal, as well as concentrations which define risk stratification cutoffs and other diagnostic cutoffs.

    CELL-FREE REGIONS BY LABEL-FREE MAGNETIC EXCLUSION

    公开(公告)号:US20240263163A1

    公开(公告)日:2024-08-08

    申请号:US18565957

    申请日:2022-06-01

    Abstract: This application relates to methods of generating cell/particle-free regions in a cellular/particle aggregate using label-free magnetic manipulation. For example, the method may include suspending cells/particles in a paramagnetic culture medium, the cells/particles being diamagnetic; seeding the cells/particles and the paramagnetic culture medium into microwells; and placing the microwells over an array of magnet pairs where each magnet pair creates a magnetic field gradient. The magnetic susceptibility difference and the magnetic field gradient drive the cells/particles towards a spaced region between magnets in the magnet pair having a lowest magnetic field strength to create a cell/particle aggregate with a cell-free/particle-free area where the cell/particle aggregate surrounds the cell-free/particle-free area.

    DUAL-ACTIVE BRIDGE CONVERTER AND APPLICATIONS OF SAME

    公开(公告)号:US20240223097A1

    公开(公告)日:2024-07-04

    申请号:US18541124

    申请日:2023-12-15

    Abstract: A dual-active bridge (DAB) converter is provided. The DAB converter comprises a primary sub-circuit coupled to a direct-current (DC) input voltage, a first secondary sub-circuit and a second secondary sub-circuit, and a transformer isolating the primary sub-circuit from the first and the second secondary sub-circuits and comprising a predetermined number of turns. Each of the first and the secondary sub-circuits comprise a corresponding inductor; the first and the second secondary sub-circuits being configurable in a series mode and a parallel mode by switching configurations of a first, second and third transition switch; and the first and the second secondary sub-circuits providing an output charging voltage and an output charging current for charging an external device. A charging station comprising one or more charging poles, with each charging pole comprising one of more DAB converters is also disclosed.

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