Invention Grant
US07791295B2 Field weakening control apparatus for permanent magnet motor and electric power steering using same
有权
用于永磁电动机的弱磁控制装置和使用它的电动助力转向装置
- Patent Title: Field weakening control apparatus for permanent magnet motor and electric power steering using same
- Patent Title (中): 用于永磁电动机的弱磁控制装置和使用它的电动助力转向装置
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Application No.: US12108676Application Date: 2008-04-24
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Publication No.: US07791295B2Publication Date: 2010-09-07
- Inventor: Kentaro Oi , Kazuaki Tobari , Yoshitaka Iwaji , Mitsuo Sasaki , Tatsuo Matsumura
- Applicant: Kentaro Oi , Kazuaki Tobari , Yoshitaka Iwaji , Mitsuo Sasaki , Tatsuo Matsumura
- Applicant Address: JP Tokyo
- Assignee: Hitachi, Ltd.
- Current Assignee: Hitachi, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Antonelli, Terry, Stout & Kraus, LLP.
- Priority: JP2007-114971 20070425
- Main IPC: H02P3/18
- IPC: H02P3/18 ; H02P5/28 ; H02P7/36

Abstract:
A motor control apparatus which controls an output voltage reference for an inverter driving a permanent magnet synchronous motor based on d-axis and q-axis current references, d-axis and q-axis current detected values, and a computed frequency value. When a torque reference specifying torque greater than maximum torque that the motor can output is input, a limit value for a phase angle that is a deviation between a rotation phase reference of control and a rotation phase value of the motor is varied depending on a quantity of the predetermined state.
Public/Granted literature
- US20080265809A1 Field weakening control apparatus for permanent magnet motor and electric power steering using same Public/Granted day:2008-10-30
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