Invention Grant
- Patent Title: Rotor temperature detecting device in an electric motor and overheat protection device of an electric motor
- Patent Title (中): 电动机中的转子温度检测装置和电动机的过热保护装置
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Application No.: US14643175Application Date: 2015-03-10
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Publication No.: US09528882B2Publication Date: 2016-12-27
- Inventor: Tatsuya Senoo
- Applicant: FANUC CORPORATION
- Applicant Address: JP Yamanashi
- Assignee: Fanuc Corporation
- Current Assignee: Fanuc Corporation
- Current Assignee Address: JP Yamanashi
- Agency: Fredrikson & Byron, P.A.
- Priority: JP2014-049206 20140312
- Main IPC: G05B5/00
- IPC: G05B5/00 ; G01K7/00 ; G01K13/00 ; H02P29/00 ; G01R31/34
Abstract:
A rotor temperature detecting device in an electric motor of the present invention includes: a power calculator configured to calculate power of an electric motor; a rotational speed detector configured to detect rotational speed of the electric motor; a storage configured to store coefficients depending on the rotational speed; and, a rotor temperature estimator configured to estimate temperature of a rotor of the electric motor, based on the power and the coefficient.
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