公开(公告)号：US09735713B2

公开(公告)日：2017-08-15

申请号：US14436729

申请日：2012-10-22

Applicant: ABB Schweiz AG

Inventor： Magnus Ek ,  Sören Kling ,  Tobias Gentzell ,  Åsa Grönqvist ,  Aravindh Vishnu

IPC: G05B5/00 ,  H02P1/04 ,  F04D3/00 ,  F04D29/70 ,  G05B19/042 ,  H02P1/40 ,  H02P1/26

CPC classification number: H02P1/04 ,  F04D3/00 ,  F04D29/708 ,  G05B19/0428 ,  H02P1/26 ,  H02P1/40

Abstract: A method for controlling circuitry of a softstarter arrangement to operate an electric motor for driving a pump is provided, wherein the softstarter circuitry electrically connects the motor to electric mains. The method includes: (i) controlling the circuitry of the softstarter arrangement to accelerate the motor up to full speed in a forward direction; (ii) controlling the circuitry of the softstarter arrangement to decelerate the motor when the motor has run at full speed in the forward direction for a first period of time; (iii) controlling the circuitry of the softstarter arrangement to accelerate the motor up a specified speed in a reverse direction; (iv) controlling the circuitry of the softstarter arrangement to decelerate the motor when the motor has run at the specified speed in the reverse direction for a second period of time; and (v) repeating the steps (i)-(iv) one or more times.