公开(公告)号：US20240388226A1

公开(公告)日：2024-11-21

申请号：US18789892

申请日：2024-07-31

Applicant: Snap-on Incorporated

Inventor： Michael T. Rajzer ,  Jason Genz ,  Daniel Nitzsche

IPC: H02P6/12 ,  B25B21/00 ,  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.

公开(公告)号：US12101051B2

公开(公告)日：2024-09-24

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 ,  B25B21/00

CPC classification number: H02P6/153 ,  B25B21/004

Abstract: The present invention relates to a method of commutation control of a brushless DC (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.

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.

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.

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

IPC: H02P6/12 ,  B25B21/00 ,  H02P6/16 ,  H02P6/15

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.