公开(公告)号：US10082216B1

公开(公告)日：2018-09-25

申请号：US15656021

申请日：2017-07-21

Applicant: Johnson Controls Technology Company

Inventor： Nicholas S. Van Derven ,  Kraig D. Ritmanich ,  Peter J. Wawer

IPC: H02P8/00 ,  F16K31/04 ,  H02P8/12 ,  H02P8/34 ,  F16K37/00

CPC classification number: F16K31/04 ,  F16K31/046 ,  F16K37/0041 ,  F24F11/65 ,  F24F11/72 ,  F24F11/88 ,  F25B27/005 ,  F25B49/02 ,  F25B2339/047 ,  F25B2600/2513 ,  H02P8/12 ,  H02P8/34

Abstract: Disclosed is a system to dynamically operate a valve including a direct current (DC) stepper motor. The system includes a valve detector to identify the valve and to determine whether the valve is operable in multiple operating modes. The system further includes a mode selector electrically coupled to the valve detector. The mode selector selects an operating mode from the multiple operating modes. The system further includes a current selector electrically coupled to the mode selector. The current selector selects a target current level based on the selected operating mode. The system further includes a motor controller electrically coupled to the current selector and the DC stepper motor. The motor controller drives the DC stepper motor with a drive current at the selected target current level.