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公开(公告)号：US20220224258A1
公开(公告)日：2022-07-14
申请号：US17147205
申请日：2021-01-12
Applicant: Snap-on Incorporated
Inventor： Michael T. Rajzer , Jason Genz
Abstract: A computer implemented method for controlling commutation of a brushless DC (BLDC) motor. The method includes controlling a switching array to drive the BLDC motor at a first commutation, receiving and monitoring power consumption signals indicating power consumption of the BLDC motor, determining whether the power consumption exceeds a first threshold value, and controlling the switching array to drive the BLDC motor at a second commutation when the power consumption exceeds the first threshold value.
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公开(公告)号：US20220190752A1
公开(公告)日：2022-06-16
申请号：US17122285
申请日：2020-12-15
Applicant: Snap-on Incorporated
Inventor： Michael Rajzer , Jason Genz
Abstract: A two-stage braking method for a brushless DC (BLDC) motor. The method includes control a switching array to drive the BLDC motor according to a commutation scheme to decrease a speed of the BLDC motor, allow the BLDC motor to coast, determine the speed of the BLDC motor, and actuate high side switches and/or low side switches to substantially stop rotational movement of the BLDC motor.
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公开(公告)号：US20220088755A1
公开(公告)日：2022-03-24
申请号：US17462999
申请日：2021-08-31
Applicant: Snap-on Incorporated
Inventor： Michael T. Rajzer , Jason Genz , Craig Brouwers , Joshua M. Beer
Abstract: An illumination source disposed in a housing of a tool without the need for fasteners or snaps. The illumination source includes a number illumination elements, such as LEDs, disposed on a circuit board. A lens and the housing cooperatively direct light emitted by the illumination elements away from a user's eyes during use of the tool.
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公开(公告)号：US12095402B2
公开(公告)日：2024-09-17
申请号：US17694228
申请日：2022-03-14
Applicant: Snap-on Incorporated
Inventor： Michael T. Rajzer , Jason Genz , Daniel Nitzsche
IPC: H02P29/028 , B25B21/00 , H02P6/12 , H02P6/15 , H02P6/16
CPC classification number: H02P6/12 , B25B21/004 , H02P6/15 , H02P6/16
Abstract: The present invention relates broadly to commutation control of a BLDC motor for use with, for example, a power tool. The method uses a controller to control a BLDC motor in the event of a position sensor failure. Rather than ceasing operation of the motor and indicating a fault or error message to the user, the present invention determines when the next transition should occur based on the time between past hall transitions using a timer. Thus, if one or two position sensors are no longer providing position information to the controller, the controller can determine when the transitions would be changing based on past transitions to continue controlling the motor and prevents the motor from ceasing operation.
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公开(公告)号：US12090606B2
公开(公告)日：2024-09-17
申请号：US17028054
申请日：2020-09-22
Applicant: Snap-on Incorporated
Inventor： Joshua M. Beer , Jason Genz , Craig Brouwers , Michael T. Rajzer
IPC: B25B21/00
CPC classification number: B25B21/004
Abstract: The present invention relates to a motorized hand tool having a motor with a motor front casing adapted to resist rotation of the motor with respect to a housing of the tool, without use of extra fasteners or machining operations. The motor front casing includes first and second flanges and first and second tabs that protrude radially outwardly and that are disposed proximal to respective ends of the flanges. When the motor is installed, the tabs abut a ratchet head housing and are sandwiched between the ratchet head housing and a rib if a tool housing to resist motor rotation and ensure all forces are distributed across a whole face of the rib to minimize deformation of the rib and/or tool housing.
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Patent Agency Ranking
公开(公告)号：US20220311365A1
公开(公告)日：2022-09-29
申请号：US17694260
申请日：2022-03-14
Applicant: Snap-on Incorporated
Inventor： Jason Genz , Michael T. Rajzer , Christoffer S. Fox , Daniel Nitzsche
IPC: H02P6/15
Abstract: The present invention relates to a method of commutation control of a BLDC motor. The method uses a controller to control the BLDC motor using a modified six-step commutation. The method adds six intermediate steps that overlap the six-step commutation. Each of the six steps overlap with preceding and following steps, resulting in six additional intermediate steps in which all three phases are active. By doubling the number of steps, current and torque will vary less over time compared with current solutions without increasing the size or changing the design of the motor.
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公开(公告)号：US20220311364A1
公开(公告)日：2022-09-29
申请号：US17694228
申请日：2022-03-14
Applicant: Snap-on Incorporated
Inventor： Michael T. Rajzer , Jason Genz , Daniel Nitzsche
Abstract: The present invention relates broadly to commutation control of a BLDC motor for use with, for example, a power tool. The method uses a controller to control a BLDC motor in the event of a position sensor failure. Rather than ceasing operation of the motor and indicating a fault or error message to the user, the present invention determines when the next transition should occur based on the time between past hall transitions using a timer. Thus, if one or two position sensors are no longer providing position information to the controller, the controller can determine when the transitions would be changing based on past transitions to continue controlling the motor and prevents the motor from ceasing operation.
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公开(公告)号：US20220311237A1
公开(公告)日：2022-09-29
申请号：US17694242
申请日：2022-03-14
Applicant: Snap-on Incorporated
Inventor： Michael T. Rajzer , Jason Genz , Christoffer S. Fox
Abstract: Overcurrent protection of an electrically powered, motorized device, such as a power tool, wherein the tool includes a tool housing, an output assembly, a trigger, an electrical safety device, a motor, an indicator, a controller, and a power source. The electrical safety device, for example a fuse, is disposed in series with a power connection from the power source to the controller. The controller measures current passing through the electrical safety device in time intervals when the trigger is actuated. The controller determines accumulated thermal energy passing through the electrical safety device, and compares the accumulated thermal energy to a threshold. If the accumulated thermal energy exceeds the threshold, the controller ceases or discontinues to allow power to be provided to the motor from the power source, thereby shutting off the motor. The controller may also activate the indicator to indicate a fault to the user.
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公开(公告)号：US20220212332A1
公开(公告)日：2022-07-07
申请号：US17143565
申请日：2021-01-07
Applicant: Snap-on Incorporated
Inventor： Joshua M. Beer , Jason Genz
Abstract: A display assembly for a tool having a housing. The display assembly has a display unit, a frame, a display housing, and buttons. The display housing has a protrusion that is received by an aperture of the frame adapted to receive the protrusion to couple the frame to the display housing. The display unit is disposed between the display housing and the frame. The buttons are disposed on the display housing.
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公开(公告)号：US11213937B1
公开(公告)日：2022-01-04
申请号：US17028296
申请日：2020-09-22
Applicant: Snap-on Incorporated
Inventor： Michael T. Rajzer , Jason Genz , Craig Brouwers , Joshua M. Beer
Abstract: An illumination source disposed in a housing of a tool without the need for fasteners or snaps. The illumination source includes a number illumination elements, such as LEDs, disposed on a circuit board. A lens and the housing cooperatively direct light emitted by the illumination elements away from a user's eyes during use of the tool.
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