Invention Grant
- Patent Title: Actuator with residual magnetic hysteresis reset
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Application No.: US14643872Application Date: 2015-03-10
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Publication No.: US09932947B2Publication Date: 2018-04-03
- Inventor: Thomas Wolfgang Nehl , Suresh Gopalakrishnan , Chandra S. Namuduri , Avoki M. Omekanda
- Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
- Applicant Address: US MI Detroit
- Assignee: GM Global Technology Operations LLC
- Current Assignee: GM Global Technology Operations LLC
- Current Assignee Address: US MI Detroit
- Main IPC: H01H47/22
- IPC: H01H47/22 ; H01H47/32 ; H01H47/04 ; F02M51/06 ; H01F7/18 ; F02D41/20 ; F02D41/40

Abstract:
An electromagnetic actuation system includes an electrical coil, a magnetic core, an armature, a controllable bi-directional drive circuit for selectively driving current through the coil in either of two directions, and a control module providing an actuator command to the drive circuit. Current is driven though the electrical coil in a first direction when an actuation is desired. When the actuation is not desired current is driven through the electrical coil including in a second direction sufficient to reduce residual flux within the actuator below a level passively attained within the actuator at zero coil current.
Public/Granted literature
- US20150267660A1 Actuator with Residual Magnetic Hysteresis Reset Public/Granted day:2015-09-24
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