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    Motor temperature control technique with temperature override
    1.
    发明授权
    Motor temperature control technique with temperature override 有权

    公开(公告)号：US10782057B2

    公开(公告)日：2020-09-22

    申请号：US16234549

    申请日：2018-12-27

    Applicant: Johnson Controls Technology Company

    Inventor： Curtis Christian Crane

    IPC: F25B49/02 ,  H02K11/35 ,  H02K7/09 ,  F25B31/00 ,  H02K7/08 ,  H02K11/25 ,  H02P29/64 ,  F25B41/04 ,  F25B25/00

    Abstract: A method of cooling a motor coupled to a compressor of a chiller includes adjusting a position of a motor cooling valve located fluidly between the motor and a refrigerant source, using a motor temperature control system coupled to the motor cooling valve to regulate an amount of refrigerant introduced into the motor from the condenser according to a temperature control scheme performed as a function of a monitored temperature in the motor, a first temperature threshold, and a second temperature threshold lower than the first temperature threshold. The temperature control scheme includes a motor cooling control process that adjusts the position of the motor cooling valve based on a stator winding temperature set point relating to stator windings of the motor. A proportionally limited close command override associated with a first temperature range above the second temperature threshold proportionally limits a close command provided to the motor cooling valve.

    MOTOR TEMPERATURE CONTROL TECHNIQUE WITH TEMPERATURE OVERRIDE
    4.
    发明申请
    MOTOR TEMPERATURE CONTROL TECHNIQUE WITH TEMPERATURE OVERRIDE 审中-公开

    公开(公告)号：US20190203998A1

    公开(公告)日：2019-07-04

    申请号：US16234549

    申请日：2018-12-27

    Applicant: Johnson Controls Technology Company

    Inventor： Curtis Christian Crane

    IPC: F25B49/02 ,  H02K11/25 ,  H02P29/64 ,  F25B41/04 ,  F25B31/00

    Abstract: A method of cooling a motor coupled to a compressor of a chiller includes adjusting a position of a motor cooling valve located fluidly between the motor and a refrigerant source, using a motor temperature control system coupled to the motor cooling valve to regulate an amount of refrigerant introduced into the motor from the condenser according to a temperature control scheme performed as a function of a monitored temperature in the motor, a first temperature threshold, and a second temperature threshold lower than the first temperature threshold. The temperature control scheme includes a motor cooling control process that adjusts the position of the motor cooling valve based on a stator winding temperature set point relating to stator windings of the motor. A proportionally limited close command override associated with a first temperature range above the second temperature threshold proportionally limits a close command provided to the motor cooling valve.

    Variable speed drive control for chiller coast-through
    5.
    发明授权
    Variable speed drive control for chiller coast-through 有权

    公开(公告)号：US10337781B2

    公开(公告)日：2019-07-02

    申请号：US14421058

    申请日：2013-08-21

    Applicant: JOHNSON CONTROLS TECHNOLOGY COMPANY

    Inventor： Curtis Christian Crane ,  Mark Bodell, II ,  Curtis G. Rager ,  John C. Hansen ,  Dean K. Norbeck

    IPC: F25B49/02 ,  H02P29/024 ,  H02P23/00

    Abstract: A chiller system includes a compressor, a condenser and an evaporator in fluid communication. A motor drives the compressor. A variable speed drive powers the motor. An oil heater and pump system circulate heated lubricating oil in the compressor. A control panel is arranged to determine whether an input parameter is greater than or equal to a threshold parameter; deactivate the VSD in response to sensing that the input parameter is less than the threshold parameter; determine at least one chiller capacity control parameter at a point when the VSD is deactivated, and maintain the at least one chiller capacity control parameter while the VSD is deactivated; determine that the input parameter has been restored; determine a motor rotation and motor rotational speed; and in response to determining that the input parameter is restored and the motor is rotating in a forward direction, reactivate the VSD.

    Variable speed drive control for chiller coast-through
    6.
    发明授权
    Variable speed drive control for chiller coast-through 有权

    公开(公告)号：US11480373B2

    公开(公告)日：2022-10-25

    申请号：US16459432

    申请日：2019-07-01

    Applicant: Johnson Controls Technology Company

    Inventor： Curtis Christian Crane ,  Mark Bodell, II ,  Curtis G. Rager ,  John C. Hansen ,  Dean K. Norbeck

    IPC: F25B49/02 ,  H02P29/024 ,  H02P23/00

    Abstract: A chiller system includes a compressor, a condenser and an evaporator in fluid communication. A motor drives the compressor. A variable speed drive powers the motor. An oil heater and pump system circulate heated lubricating oil in the compressor. A control panel is arranged to determine whether an input parameter is greater than or equal to a threshold parameter; deactivate the VSD in response to sensing that the input parameter is less than the threshold parameter; determine at least one chiller capacity control parameter at a point when the VSD is deactivated, and maintain the at least one chiller capacity control parameter while the VSD is deactivated; determine that the input parameter has been restored; determine a motor rotation and motor rotational speed; and in response to determining that the input parameter is restored and the motor is rotating in a forward direction, reactivate the VSD.

    CONTROL SYSTEM FOR HVAC UNIT
    7.
    发明申请
    CONTROL SYSTEM FOR HVAC UNIT 有权

    公开(公告)号：US20210010732A1

    公开(公告)日：2021-01-14

    申请号：US16768830

    申请日：2018-12-04

    Applicant: Johnson Controls Technology Company

    Inventor： Gail Elaine Lindberg ,  Curtis Christian Crane ,  Carlos Jose Uribe

    IPC: F25B49/02 ,  F25B41/06

    Abstract: A heating, ventilating, and air conditioning (HVAC) system that includes a vapor compression system having a refrigerant, a compressor of the vapor compression system configured to circulate the refrigerant through the vapor compression system, an expansion device of the vapor compression system configured to adjust a flow of the refrigerant through the vapor compression system, and a controller configured to adjust a position of the expansion device based on a measured amount of superheat of the refrigerant entering the compressor, a measured discharge temperature of the refrigerant leaving the compressor, or a combination thereof, such that the measured amount of superheat of the refrigerant entering the compressor reaches a target amount of superheat, the measured discharge temperature of the refrigerant leaving the compressor reaches a target discharge temperature, or a combination thereof.

    Expansion device control system for heating, ventilation, and air conditioning (HVAC) unit
    9.
    发明授权
    Expansion device control system for heating, ventilation, and air conditioning (HVAC) unit 有权

    公开(公告)号：US11340002B2

    公开(公告)日：2022-05-24

    申请号：US16768830

    申请日：2018-12-04

    Applicant: Johnson Controls Technology Company

    Inventor： Gail Elaine Lindberg ,  Curtis Christian Crane ,  Carlos Jose Uribe

    IPC: F25B49/02 ,  F25B41/31 ,  F25B41/34

    Abstract: A heating, ventilating, and air conditioning (HVAC) system that includes a vapor compression system having a refrigerant, a compressor of the vapor compression system configured to circulate the refrigerant through the vapor compression system, an expansion device of the vapor compression system configured to adjust a flow of the refrigerant through the vapor compression system, and a controller configured to adjust a position of the expansion device based on a measured amount of superheat of the refrigerant entering the compressor, a measured discharge temperature of the refrigerant leaving the compressor, or a combination thereof, such that the measured amount of superheat of the refrigerant entering the compressor reaches a target amount of superheat, the measured discharge temperature of the refrigerant leaving the compressor reaches a target discharge temperature, or a combination thereof.

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