Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2007-06-28
2009-06-16
Ip, Paul (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S717000, C318S807000, C318S809000
Reexamination Certificate
active
07548039
ABSTRACT:
A motor control unit including a rotational position detector detecting a rotational position of a brushless DC motor; a current detector detecting a current of the brushless DC motor; a coordinate transformer executing rotational coordinate transformation of the current by a control phase angle and obtaining a d-axis current and a q-axis current; a current controller generating a command d-axis voltage based on a d-axis current error, and generating a command q-axis voltage based on a q-axis current error; a coordinate transformer generating a three-phase command voltage by the control phase angle; a conductive signal generator; and a position controller that, when executing a positioning operation, maintains the command d-axis current at a constant value and the command q-axis current at zero, and that controls the control phase angle based on a difference between a target stop rotational position and a rotational position detected by the rotational position detector.
REFERENCES:
patent: 5278486 (1994-01-01), Kim
patent: 7017377 (2006-03-01), Hosoito et al.
patent: 7141948 (2006-11-01), Kifuku et al.
patent: 7161317 (2007-01-01), Matsushita et al.
patent: 2006/0043917 (2006-03-01), Kifuku et al.
patent: 2006/0076832 (2006-04-01), Matsushita et al.
patent: 2005-292898 (2005-10-01), None
Awazu Minoru
Hasegawa Yukihisa
Kominato Shinichi
Nagai Kazunobu
Oomura Naoki
Ip Paul
Kabushiki Kaisha Toshiba
Pillsbury Winthrop Shaw & Pittman LLP
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