Stator winding for an electric motor

    公开(公告)号:US09871427B2

    公开(公告)日:2018-01-16

    申请号:US14212494

    申请日:2014-03-14

    CPC classification number: H02K11/33 H02K1/141 H02K3/18 H02K16/04 H02K2213/12

    Abstract: An electric motor having a rotor core with a rotatable shaft extending therethrough, and a stator positioned radially outward of the rotor core is disclosed herein. The stator can include at least one pair of first and second coils circumferentially positioned on opposing sides of the rotor. Each pair of the first and second coils includes first and second elements electronically isolated from one another. A first frequency converter is electrically connected to a first conductive wire and a second frequency converter is electrically connected to a second conductive wire. The first conductive wire is wound about the first element of the first coil and the first element of the second coil in series and the second conductive wire is wound about the second element of the first coil and the second element of the second coil in series.

    Cooling system for electric rotor machine with symmetrical stator passages

    公开(公告)号:US09831746B2

    公开(公告)日:2017-11-28

    申请号:US14526064

    申请日:2014-10-28

    CPC classification number: H02K9/02 H02K1/148 H02K1/20 H02K2201/03

    Abstract: A symmetrical cooling system for an electric rotor machine that includes a passageway that is positioned between portions of the stator, and which provides a pathway for a cooling medium. Stator ducts positioned within the stator, or portions thereof, are in fluid communication with the passageway. Cooling medium may flow through the stator ducts from the passageway to ends of the stator so that the cooling medium only travels along a portion of the overall axial length of the stator. The symmetrical cooling system also includes an air gap that is positioned between the stator and the rotor, and which receives cooling medium from the passageway at a midsection of the air gap. Cooling medium received at the midsection of the air gap may then flow towards either first or second ends of the stator.

    COOLING METHODS FOR ELECTRICALLY OPERATED DIAPHRAGM PUMPS

    公开(公告)号:US20170298930A1

    公开(公告)日:2017-10-19

    申请号:US15489512

    申请日:2017-04-17

    Inventor: Joshua D. West

    CPC classification number: F04B53/08 F04B43/026 F04B43/04 F04B53/10

    Abstract: A diaphragm pump includes motor that drives an armature in a reciprocating linear motion. A first diaphragm is coupled to a first end of the armature, the first diaphragm positioned in a first pumping chamber and configured to pump fluid into and out of the first pumping chamber in response to the reciprocating linear motion of the armature. A cooling intake valve and a cooling exhaust valve are in operative communication with the first diaphragm, wherein as the armature advances to flex the first diaphragm to decrease a volume of the first pumping chamber, the first diaphragm draws ambient air behind the first diaphragm through the cooling intake valve, and wherein as the armature reverses course to cause the first diaphragm to increase the volume of the first pumping chamber, the first diaphragm forces ambient air out of the first pumping chamber through the cooling exhaust valve.

    Diaphragm Pumps With Air Savings Devices
    35.
    发明申请

    公开(公告)号:US20170226997A1

    公开(公告)日:2017-08-10

    申请号:US15493820

    申请日:2017-04-21

    Abstract: In at least one illustrative embodiment, a diaphragm pump may comprise a sleeve formed to include (i) a bore extending along a longitudinal axis and (ii) a sleeve port that opens to the bore, and a spool supported in the bore of the sleeve and formed to include a spool port, the spool being configured to move with a diaphragm during at least a portion of a stroke of the diaphragm such that the spool slides relative to the sleeve and, when the diaphragm reaches a turndown position that is between first and second end-of-stroke positions, the spool port aligns with the sleeve port to cause a pilot signal to be supplied to a cut-off valve. At least one of the sleeve and the spool may be rotatable about the longitudinal axis to adjust a location of the turndown position relative to the first and second end-of-stroke positions.

    COMPRESSOR WITH RIBBED COOLING JACKET
    37.
    发明申请

    公开(公告)号:US20170175744A1

    公开(公告)日:2017-06-22

    申请号:US15381334

    申请日:2016-12-16

    Abstract: The application is directed to a compressor having a housing with a fluid compression region to rotatably support a compressor rotor. The housing includes an inner wall formed as a thin wall positioned about the compression region and an outer wall spaced radially outward of the inner wall. A cooling chamber is formed in a space between the inner and outer walls. A rib formed on the inner wall projects into the cooling chamber to provide structural support and prevent thermal deformation of the thin inner wall during compressor operation.

Patent Agency Ranking