Motor driving apparatus, and initial driving method for...

Details Motor driving apparatus, and initial driving method for... Motor driving apparatus, and initial driving method for...

2005-08-24

2008-12-16

Ro, Bentsu (Department: 2837)

Electricity: motive power systems

Synchronous motor systems

Brushless motor closed-loop control

C318S430000

Reexamination Certificate

active

07466094

ABSTRACT:
The present invention relates to a method of driving a three-phase electric motor, comprising measuring a three-phase excitation current by selectively exciting two phases; calculating a current difference between excitation phase currents having the same phase; classifying the current difference according to variation; and calculating a rotator position in the three-phase motor on the basis of a classification result and the magnitude of the excitation phase current. Thus the present invention provides an electric motor driving apparatus and a driving method which can be applied to various kinds of motors and which precisely measures an initial position of the rotator.

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