Centrifugal blower assembly and method for assembling the same

    公开(公告)号:US10895266B2

    公开(公告)日:2021-01-19

    申请号:US16122627

    申请日:2018-09-05

    Abstract: A centrifugal blower assembly comprises a scroll wall and a pair of opposing sidewalls. The scroll wall is positioned between the pair of opposing sidewalls such that the scroll wall and opposing sidewalls together define a blower chamber and a blower outlet. The blower outlet defines a blower outlet area. An adjustable outlet plate is pivotably coupled to the pair of opposing sidewalls such that the adjustable outlet plate is moveable between a first position to define a first blower outlet area and a second position to define a second blower outlet area.

    Hydrodynamic bearing assembly and method of assembling the same

    公开(公告)号:US10683888B2

    公开(公告)日:2020-06-16

    申请号:US16141500

    申请日:2018-09-25

    Abstract: A hydrodynamic bearing assembly includes a first member including a first engaging surface. The first member is stationary in a non-operating mode of the bearing assembly and rotates about an axis in an operational mode of the bearing assembly. The first member includes a first bore and a shaft positioned within the first bore and including an end surface. The hydrodynamic bearing assembly also includes a second member including a second bore and a second engaging surface positioned adjacent the first engaging surface. The second member is stationary in both the non-operating mode and the operational mode of the bearing assembly. The hydrodynamic bearing assembly further includes a spacer member positioned within the second bore and is configured to engage the first member to define a first gap between the first engaging surface and the second engaging surface in the non-operational mode.

    Centrifugal pump assemblies having an axial flux electric motor and methods of assembly thereof

    公开(公告)号:US10605245B2

    公开(公告)日:2020-03-31

    申请号:US15704750

    申请日:2017-09-14

    Abstract: An electric motor assembly includes a stator assembly and a rotor assembly positioned adjacent the stator assembly to define an axial gap therebetween. The stator assembly is configured to induce a first axial force on the rotor assembly. The electric motor assembly also includes an impeller directly coupled to the rotor assembly opposite the stator assembly such that the rotor assembly and the impeller are configured to rotate about an axis. A fluid channeled by the impeller induces a second axial force on the impeller. The electric motor assembly further includes a hydrodynamic bearing assembly including a rotating member coupled to the rotor assembly and stationary member at least partially circumscribing the rotating member such that rotation of the rotating member with respect to the stationary member is configured to induce a third axial force on the rotor assembly.

    Water heater blower assembly having a low exhaust port

    公开(公告)号:US10443891B2

    公开(公告)日:2019-10-15

    申请号:US15381443

    申请日:2016-12-16

    Abstract: A draft inducer blower assembly for use with a water heater has a housing, a motor, and a fan. The housing has an exhaust volute surrounding the fan and a base adapted to be mounted atop a water heater. The base has an inlet port adapted to receive exhaust gas from the water heater. The fan is connected to the motor for rotation about a rotation axis. The exhaust volute has a cut-off at a cut-off angle relative to the rotation axis. The exhaust volute has an exhaust outlet passageway that extends to an exhaust port. The exhaust port is lower than the top of the exhaust volute.

    Motor controller for electric blower motors

    公开(公告)号:US10425029B1

    公开(公告)日:2019-09-24

    申请号:US15995950

    申请日:2018-06-01

    Abstract: A motor controller for an electric motor includes a drive circuit that regulates power supplied to a stator of the electric motor to turn a rotor. The motor controller includes a communication interface that receives coefficients. The motor controller includes a processor coupled to the drive circuit. The processor receives an airflow rate demand, computes a speed, computes a torque set point as a function of at least a sum of first and second terms. The first term is defined as the first coefficient multiplied by the airflow rate demand raised to a power greater than one, and the second term is defined as the second coefficient multiplied by the speed raised to a power greater than one. The processor controls the drive circuit based on the torque set point to supply electrical power to the electric motor.

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