Motor controller and electric power steering apparatus

Details Motor controller and electric power steering apparatus Motor controller and electric power steering apparatus

2006-10-24

2006-10-24

Donovan, Lincoln (Department: 2837)

Electricity: motive power systems

Positional servo systems

Pulse-width modulated power input to motor

C318S580000, C318S811000, C318S254100

Reexamination Certificate

active

07126304

ABSTRACT:
A microcomputer includes a rotation angular velocity computation section, a feedback gain determination section, and a dead time compensation amount determination section. The rotation angular velocity determination section computes the rotation angular velocity of a brushless motor. Based on the rotation angular velocity, the feedback gain determination section determines feedback gains. The dead time compensation amount determination section determines a dead time compensation amount. The greater the absolute value of the rotation angular velocity, that is, the higher the rotation speed of the brushless motor, the greater the feedback gains determined by the feedback gain determination section become, and the higher the responsivity of the feedback gains becomes. The greater the absolute value of the rotation angular velocity, the smaller the dead time compensation amount determined by the dead time compensation amount determination section becomes.

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Hidehiko Sugimoto, “Facts of Theory and Design of AC Servo Motor Systems”, Denshi Shuppansha, 6thedition, Aug. 2002, pp. 56-58. (with Partial English Translation).

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