Invention Grant
- Patent Title: Cogging-torque actuator
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Application No.: US16647816Application Date: 2018-09-17
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Publication No.: US11967871B2Publication Date: 2024-04-23
- Inventor: Jacob J Abbott , Shad Roundy , Jacob Aman
- Applicant: University of Utah Research Foundation
- Applicant Address: US UT Salt Lake City
- Assignee: University of Utah Research Foundation
- Current Assignee: University of Utah Research Foundation
- Current Assignee Address: US UT Salt Lake City
- Agency: Thorpe North & Western, LLP.
- International Application: PCT/US2018/051376 2018.09.17
- International Announcement: WO2019/055937A 2019.03.21
- Date entered country: 2020-03-16
- Main IPC: H02K21/20
- IPC: H02K21/20 ; A61F2/70 ; A61H3/00 ; H02K3/20 ; H02K11/21 ; H02K11/24 ; A61F2/68 ; A61F2/76

Abstract:
An electromagnetic actuator for non-continuous rotation (cogging-torque actuator (CTA)) (100) comprises a support structure (116), an output shaft (104) rotatable about and defining an axis of rotation (X), a permanent magnet rotor (106) comprising at least two magnetic poles (108a, 108b) attached to the output shaft (104), and a stator device (110) comprising a ferromagnetic pole body (112) attached to the support structure (116) and surrounding the at least two magnetic poles (108a, 108b). The ferromagnetic pole body (112) can have at least four ferromagnetic stator poles (112a-d) each wrapped in a conductive wire (114a-d) to define a stator coil. The at least four ferromagnetic stator poles (112a-d) are sized, and spaced radially from each other, so as to define a maximum cogging torque of the electromagnetic actuator (100). The CTA (100) can operate as an actuator, an elastic spring, a clutch, and/or a load support device.
Public/Granted literature
- US20200274431A1 COGGING-TORQUE ACTUATOR Public/Granted day:2020-08-27
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