Invention Application
- Patent Title: METHODS AND APPARATUS FOR MEASURING SENSORLESS BRUSHLESS DC MOTOR LOAD
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Application No.: US15866316Application Date: 2018-01-09
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Publication No.: US20180291549A1Publication Date: 2018-10-11
- Inventor: Chin-Hao CHEN , Cheng-Chung LI , Sheng-Hua LI , Yin-Yuan CHEN
- Applicant: Delta Electronics, Inc.
- Priority: CN201710229556.1 20170410
- Main IPC: D06F39/00
- IPC: D06F39/00 ; D06F37/30 ; H02P6/30 ; H02P6/08

Abstract:
A method for measuring sensorless brushless-DC motor load, adapted to a home appliance, including: accelerating, through the use of a driving circuit, a BLDC motor from an initial rotational speed to a first rotational speed; disabling, through the use of a control circuit, the driving circuit; obtaining, through the use of a detecting circuit, phase voltage information corresponding to each phase of the BLDC motor when the BLDC motor is decelerated from the first rotational speed to a second rotational speed; obtaining, through the use of the control circuit, a first time period during which the BLDC motor decelerates from the first rotational speed to the second rotational speed according to at least one piece of the phase voltage information; obtaining, through the use of the control circuit, a first predicted weight of a load according to the first time period and a first lookup table.
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