Ground fault minimization
    71.
    发明授权

    公开(公告)号:US12155198B2

    公开(公告)日:2024-11-26

    申请号:US18108771

    申请日:2023-02-13

    Applicant: Kohler Co.

    Abstract: A circuit for minimizing energy provided to a ground fault includes a source, a multiple switches, an output filter, and a controller. The switches include a first side pair of switches and a second side pair of switches configured to provide an output signal based on the source. The output filter includes one or more energy storage elements coupled to the first side pair of switches or the second side pair of switches. The controller is configured to receive a ground fault signal that indicates a fault has occurred and configured to generate a switch signal for the switches for a minimum energy state of the output filter and in response to the ground fault signal.

    Printed circuit board electrical machine

    公开(公告)号:US11799342B2

    公开(公告)日:2023-10-24

    申请号:US17166746

    申请日:2021-02-03

    Applicant: Kohler Co.

    Abstract: An electric machine includes a plurality of permanent magnets and a plurality of conductors. The plurality of permanent magnets are arranged radially around a rotation axis of the electric machine and spaced apart from the rotation axis of the electric machine. At least one of the plurality of magnets has a shape in a plane of rotation intersected by the rotation axis. The plurality of conductors are arranged relative to the plurality of magnets and spaced apart from each other circumferentially around the rotation axis of the electric machine. At least one of the plurality of conductors includes a trace having a polygon shape different than the shape of the at least one of the plurality of magnets.

    Sensorless position detection for electric machine

    公开(公告)号:US11711034B2

    公开(公告)日:2023-07-25

    申请号:US17529127

    申请日:2021-11-17

    Applicant: Kohler Co.

    CPC classification number: H02P7/0094

    Abstract: An electric machine includes a rotor, a stator, at least one measurement circuit, and a controller. The rotor includes a plurality of salient poles arranged radially around a rotation axis of the electric machine and spaced apart from the rotation axis of the electric machine. The stator includes a plurality of coils configured to selectively align with the plurality of salient poles of the rotor. The at least one measurement circuit is configured to measure at least one current through at least one of the plurality of coils. The measured current includes a current ripple. The controller configured to compute a position of the rotor based on a characteristic of the current ripple.

    HYBRID MARINE PROPULSION SYSTEM
    76.
    发明申请

    公开(公告)号:US20220242541A1

    公开(公告)日:2022-08-04

    申请号:US17585319

    申请日:2022-01-26

    Applicant: Kohler Co.

    Abstract: A hybrid propulsion system for a marine vessel is described. The hybrid propulsion system includes a shaft coupled to a propeller, a planetary gear system configured to operate in a first configuration and a second configuration, and a motor-generator. The motor-generator is configured to selectively rotate with and provide torque to the shaft through the planetary gear system in the first configuration and to rotate independently from the shaft in the second configuration. The shaft extends from the propeller through the planetary gear system and the motor-generator to a torque producing device for the marine vessel.

    Generator and battery backup with conversion device

    公开(公告)号:US11368100B2

    公开(公告)日:2022-06-21

    申请号:US15649076

    申请日:2017-07-13

    Applicant: Kohler Co.

    Abstract: An apparatus includes a controlled field alternator or utility source of electrical power, a conversion device, and a controller. The conversion device includes a first power input associated with a first power source, a second power input associated with a second power source, and circuitry configured to perform a first conversion of power from a first format from the first power source to a second format for charging the second power source and perform a second conversion of power from the second format for the second power source to a third format for supplying a load.

    Motor generator control for fixed fuel source engine

    公开(公告)号:US11242044B2

    公开(公告)日:2022-02-08

    申请号:US16038867

    申请日:2018-07-18

    Applicant: Kohler Co.

    Abstract: A system for supplementing a fixed fuel source for an engine includes a motor-generator set connected to a mechanical load device and a controller. The motor-generator set includes a motor and a generator. The engine is configured to provide a first torque from a fixed fuel source from an independent variable flow input. The fixed fuel source is independent of the engine and set external to the engine. The mechanical load device is driven by the engine and configured to require a second torque defined by an independent flow device. The controller is configured to compare the first torque and the second torque, provide a first control signal to the motor to provide power to the engine when the second torque exceeds the first torque and provide a second control signal to the generator to draw power from the engine when the first torque exceeds the second torque.

    Generator system architecture
    79.
    发明授权

    公开(公告)号:US11073808B2

    公开(公告)日:2021-07-27

    申请号:US16827128

    申请日:2020-03-23

    Applicant: Kohler Co.

    Abstract: A generator system for operation of at least one generator and at least one breaker includes an interface, a database, and a generator controller. The interface is configured to receive an architecture for the generator system. The database includes at least one generator parameter and at least one breaker parameter. The generator controller is configured to determine generator layouts from the architecture for the generator system. The generator controller determines a generator system command based on a comparison of the generator layouts, the at least one generator parameter, and the at least one breaker parameter.

    Generator waveform measurement
    80.
    发明授权

    公开(公告)号:US10823772B2

    公开(公告)日:2020-11-03

    申请号:US16410465

    申请日:2019-05-13

    Applicant: Kohler Co.

    Abstract: A generator waveform is measured using one or more techniques that reduce the computing resources for measuring the generator waveform and the time required for measuring the generator waveform. One example includes a template matching technique that iteratively selects templates to estimate the phase offset of the generator waveform. One example includes a root mean squared value calculated from less than sample time period that is less than one half of a cycle of the generator waveform. A generator controller calculates a command or parameter for the generator based on the estimated phase offset or the root mean squared value.

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