Invention Grant
- Patent Title: Encoderless motor with improved granularity and methods of use
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Application No.: US16375044Application Date: 2019-04-04
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Publication No.: US10972025B2Publication Date: 2021-04-06
- Inventor: Tien Phan , Doug Dority
- Applicant: Cepheid
- Applicant Address: US CA Sunnyvale
- Assignee: Cepheid
- Current Assignee: Cepheid
- Current Assignee Address: US CA Sunnyvale
- Agency: Kilpatrick Townsend & Stockton LLP
- Main IPC: H02P6/16
- IPC: H02P6/16 ; H02K11/00 ; H02K15/02 ; H02K11/215 ; H02K29/08 ; H02K1/27 ; H02K21/22

Abstract:
A DC electric motor having a stator mounted to a substrate, the stator having a coil assembly having a magnetic core, a rotor mounted to the stator with permanent magnets distributed radially about the rotor, the permanent magnets extending beyond the magnetic core, and sensors mounted to the substrate adjacent the permanent magnets. During operation of the motor passage of the permanent magnets over the sensors produces a substantially sinusoidal signal of varying voltage substantially without noise and/or saturation, allowing an angular position of the rotor relative the substrate to be determined from linear portions of the sinusoidal signal without requiring use of an encoder or position sensors and without requiring noise-reduction or filtering of the signal.
Public/Granted literature
- US20190334460A1 ENCODERLESS MOTOR WITH IMPROVED GRANULARITY AND METHODS OF USE Public/Granted day:2019-10-31
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