Invention Grant
US09397594B2 BLDC motor sinusoidal PWM with single phase BEMF slot detection
有权
BLDC电机正弦PWM与单相BEMF插槽检测
- Patent Title: BLDC motor sinusoidal PWM with single phase BEMF slot detection
- Patent Title (中): BLDC电机正弦PWM与单相BEMF插槽检测
-
Application No.: US14025057Application Date: 2013-09-12
-
Publication No.: US09397594B2Publication Date: 2016-07-19
- Inventor: Yisong Lu
- Applicant: Texas Instruments Incorporated
- Applicant Address: US TX Dallas
- Assignee: Texas Instruments Incorporated
- Current Assignee: Texas Instruments Incorporated
- Current Assignee Address: US TX Dallas
- Agent Lawrence J. Bassuk; Frank D. Cimino
- Main IPC: H02P6/00
- IPC: H02P6/00 ; H02P6/18
Abstract:
A back electromotive force (BEMF) zero cross may be detected in a brushless direct current (BLDC) motor that is controlled by pulse width modulation (PWM). A phase input of the BLDC motor is tri-stated during PWM periods in which the phase input conducts motor drive current, and the tri-stating of the phase input is used to determine whether a BEMF zero cross has occurred in the BLDC motor.
Public/Granted literature
- US20150069942A1 Tri-Stating Brushless DC Motor Phase for Direct Detection of Back EMF Zero Cross Public/Granted day:2015-03-12
Information query
