公开(公告)号：US10248135B2

公开(公告)日：2019-04-02

申请号：US15608596

申请日：2017-05-30

Applicant: STMicroelectronics (Grand Ouest) SAS

Inventor： Emmanuel Langouet ,  Samuel Rousselin

IPC: G05D3/18 ,  G04C3/02 ,  G05B19/40 ,  G06K13/20 ,  H02K37/22 ,  H02P8/32 ,  H02P8/22

Abstract: A stepper motor is driven according to step driving modes including a full-step driving mode, a half-step driving mode and micro-stepping modes. The stepper motor may also be driven in an acceleration phase. A method of controlling the stepper motor includes controlling the current step driving mode of the motor by a processing unit. During the acceleration phase of the stepper motor and the stepper motor being in driven in a current step driving mode other than the full-step driving mode, the processing unit tests, after each speed increase, if a remaining computing power of the processing unit is sufficient for control of the stepper motor to remain in the current step driving mode, and if not the processing unit, in presence of a first switching condition, switches control of the stepper motor to the driving mode having the closest coarser step.

公开(公告)号：US20180129227A1

公开(公告)日：2018-05-10

申请号：US15608596

申请日：2017-05-30

Applicant: STMicroelectronics (Grand Ouest) SAS

Inventor： Emmanuel Langouet ,  Samuel Rousselin

IPC: G05D3/18 ,  G05B19/40 ,  H02K37/22 ,  G06K13/20 ,  G04C3/02 ,  H02P8/32

CPC classification number: G05D3/183 ,  G04C3/022 ,  G05B19/40 ,  G06K13/20 ,  H02K37/22 ,  H02P8/22 ,  H02P8/32

Abstract: A stepper motor is driven according to step driving modes including a full-step driving mode, a half-step driving mode and micro-stepping modes. The stepper motor may also be driven in an acceleration phase. A method of controlling the stepper motor includes controlling the current step driving mode of the motor by a processing unit. During the acceleration phase of the stepper motor and the stepper motor being in driven in a current step driving mode other than the full-step driving mode, the processing unit tests, after each speed increase, if a remaining computing power of the processing unit is sufficient for control of the stepper motor to remain in the current step driving mode, and if not the processing unit, in presence of a first switching condition, switches control of the stepper motor to the driving mode having the closest coarser step.