Invention Grant
- Patent Title: Measurement of speed and direction of coasting permanent magnet synchronous motor
- Patent Title (中): 惯性永磁同步电机的速度和方向测量
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Application No.: US12041327Application Date: 2008-03-03
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Publication No.: US07965053B2Publication Date: 2011-06-21
- Inventor: Ana Borisavljevic
- Applicant: Ana Borisavljevic
- Applicant Address: US CA El Segundo
- Assignee: International Rectifier Corporation
- Current Assignee: International Rectifier Corporation
- Current Assignee Address: US CA El Segundo
- Agency: Farjami & Farjami LLP
- Main IPC: G01P3/48
- IPC: G01P3/48 ; H02P6/18
Abstract:
A method for determining the speed of rotation of an unpowered, coasting electric motor, driven, when powered, by an electronic inverter, and without activating switches of the inverter. The steps include determining an electrical frequency of a back emf signal generated at a terminal of the motor or switching node of the inverter when the motor is coasting and determining the mechanical motor frequency and thus speed of rotation by dividing the electrical frequency by the number of motor pole pairs.
Public/Granted literature
- US20080211440A1 MEASUREMENT OF SPEED AND DIRECTION OF COASTING PERMANENT MAGNET SYNCHRONOUS MOTOR Public/Granted day:2008-09-04
Information query
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