Invention Grant
- Patent Title: Three-phase brushless motor state identification
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Application No.: US16185371Application Date: 2018-11-09
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Publication No.: US10693397B2Publication Date: 2020-06-23
- Inventor: Fumio Kumazawa
- Applicant: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
- Applicant Address: US AZ Phoenix
- Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
- Current Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
- Current Assignee Address: US AZ Phoenix
- Agency: Adam R. Stephenson, Ltd.
- Main IPC: H02P6/16
- IPC: H02P6/16 ; H02P6/182 ; H02P6/22

Abstract:
A method for determining the state of a brushless motor having first, second and third phases, in some embodiments, comprises: decoupling said motor from a power source; determining whether said motor is rotating or non-rotating; if the motor is rotating, determining a first phase voltage state relative to a common voltage and a second phase voltage state relative to the common voltage, said first phase and second phase voltage states determined when a third phase voltage is within a predetermined range of said common voltage; and if the first phase voltage state and the second phase voltage state are the same, repeating said determination as to whether the motor is rotating or non-rotating.
Public/Granted literature
- US20190081580A1 THREE-PHASE BRUSHLESS MOTOR STATE IDENTIFICATION Public/Granted day:2019-03-14
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