Invention Grant
- Patent Title: Method and apparatus for estimating a rotation speed of an electric motor
- Patent Title (中): 用于估计电动机的转速的方法和装置
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Application No.: US12617339Application Date: 2009-11-12
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Publication No.: US08405344B2Publication Date: 2013-03-26
- Inventor: Samuli Heikkilä
- Applicant: Samuli Heikkilä
- Applicant Address: FI Helsinki
- Assignee: ABB Oy
- Current Assignee: ABB Oy
- Current Assignee Address: FI Helsinki
- Agency: Buchanan Ingersoll & Rooney PC
- Priority: EP08170357 20081201
- Main IPC: H02P27/04
- IPC: H02P27/04
Abstract:
A method is disclosed for estimating a rotation speed of an electric motor supplied by an inverter, by determining a time derivative of a stator current vector of the electric motor during a zero vector state of the inverter; and determining an estimate of the rotation speed of the electric motor on the basis of the determined time derivative of the stator current vector.
Public/Granted literature
- US20100134064A1 METHOD AND APPARATUS FOR ESTIMATING A ROTATION SPEED OF AN ELECTRIC MOTOR Public/Granted day:2010-06-03
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