SAMPLER DEVICE FOR PARTICLE CONCENTRATION SENSOR

    公开(公告)号:US20220291091A1

    公开(公告)日:2022-09-15

    申请号:US17636156

    申请日:2020-08-21

    Abstract: A sampler device for sampling gas for a particle concentration sensor from a flow, includes a first chamber having a first inlet and a first outlet and defining a main flow direction of a gas stream between the first inlet and the first outlet. A second inlet and a second outlet are configured to provide a sink and a source of a sample gas stream, respectively. The second inlet and the second outlet are provided in the first chamber at a first position and a second position, respectively. The first position and the second position overlap along the main flow direction. The first chamber is configured for providing a laminar flow of the gas stream at the first position and the second position.

    RF power amplifier with balun transformer

    公开(公告)号:US11909363B2

    公开(公告)日:2024-02-20

    申请号:US17276561

    申请日:2019-09-18

    Abstract: A radiofrequency power amplifier includes a balun transformer and a plurality of power transistor pairs arranged in a push-pull configuration. The balun transformer has an unbalanced coil extending between a first single-ended signal terminal and a first reference, and a balanced coil extending between a first balanced signal terminal and a second balanced signal terminal. The balun transformer also includes an auxiliary coil electrically isolated from the unbalanced coil and the balanced coil. The auxiliary coil is inductively coupled to the unbalanced coil and extends between a third balanced signal terminal and a fourth balanced signal terminal forming a balanced combiner-divider. An output of a first one of the power transistor pairs is coupled to the first and second balanced signal terminals and an output of a second one of the power transistor pairs is coupled to the third and fourth balanced signal terminals.

    Electrical converter
    24.
    发明授权

    公开(公告)号:US11881792B2

    公开(公告)日:2024-01-23

    申请号:US17603238

    申请日:2020-04-10

    CPC classification number: H02M7/797 B60L53/50 H02M1/4216 H02M3/158 H02M1/0058

    Abstract: An electrical converter for conversion between a three-phase AC signal and a DC signal may include a phase selector for connecting the three phase terminals to a first, a second, and a third intermediate node, a first buck circuit having a first switch-node terminal connected to the first DC terminal, and a second buck circuit having a second switch-node terminal connected to the second DC terminal. The first and second buck circuits convert a voltage at the first, second, and third intermediate node to a voltage between the first and second DC terminal. The first and second buck circuits are connected in series between the first and second intermediate node, and include at least one actively switchable device connected between the common node and the third intermediate node.

    VOLTAGE WAVEFORM GENERATOR FOR PLASMA ASSISTED PROCESSING APPARATUSES

    公开(公告)号:US20230260753A1

    公开(公告)日:2023-08-17

    申请号:US18005326

    申请日:2021-07-06

    CPC classification number: H01J37/32128 H01J37/32146 H01J37/32174 H01J37/321

    Abstract: A voltage waveform generator includes a common node, a voltage waveform generation circuit and a current source. The voltage waveform generation circuit is operably connected to the common node and is configured to apply a voltage signal at the common node. The current source is operably connected to the common node and configured to apply a DC current at the common node. The current source has a first switch node connected to the common node through a first inductor, and a first power supply connected to the first switch node. The power supply includes at least two first voltage nodes, and the current source is operable to switch between the at least two first voltage nodes at the first switch node.

    ELECTRICAL POWER CONVERTER
    27.
    发明公开

    公开(公告)号:US20230223841A1

    公开(公告)日:2023-07-13

    申请号:US17997803

    申请日:2021-05-03

    CPC classification number: H02M1/4233 H02M1/36 H02J7/007 H02J2207/20

    Abstract: An electrical three-phase AC-DC converter includes first and second converter stages and a controller. The first converter stage converts between three phase AC terminals and first and second intermediate nodes. The second converter stage has a boost circuit to convert between fourth and fifth intermediate nodes and first and second DC terminals. A link connects the first and second intermediate nodes to the fourth and fifth intermediate nodes. A phase selector selectively connects the three phase terminals to a third intermediate node and a current injection circuit connects the third intermediate node to the first and second DC terminals. In a mode, a current path through the third intermediate node is obtained acting parallel to a current path through the first intermediate node, through the second intermediate node, or through the first and the second intermediate nodes in alternation.

    Position sensor for a mover in a long stroke linear permanent magnet motor

    公开(公告)号:US12176767B2

    公开(公告)日:2024-12-24

    申请号:US17421140

    申请日:2020-01-27

    Abstract: A linear permanent magnet motor may include a stator unit having a coil, a mover including an array of permanent magnets, and a position sensing device operable to determine a position of the mover. The mover is arranged to move along a motion direction. The position sensing device has a sensing element operable to sense a magnetic field of the array of permanent magnets The sensing element is fixed to the stator unit. The array of permanent magnets is spaced apart from the stator unit by an air gap in which electromagnetic fields created by the array of permanent magnets and by coil are configured to interact thereby generating traction. The sensing element is positioned such that it is within a magnetic leakage field of the array of permanent magnets when the array of permanent magnets is positioned in correspondence with the sensing element.

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