Rotor angle detecting apparatus for DC brushless motor

Details Rotor angle detecting apparatus for DC brushless motor Rotor angle detecting apparatus for DC brushless motor

2005-06-21

2005-06-21

Le, N. (Department: 2858)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

C318S254100

Reexamination Certificate

active

06909290

ABSTRACT:
An inspection voltage imposer generates an inspection voltage by multiplying fundamental voltage string data in which a certain voltage output pattern where an average of output voltage levels in one period becomes 0 is set by data of a modulation signal whose value varies every period and impose the inspection voltage on a drive voltage of a motor. When the inspection voltage is imposed on the drive voltage of the motor, an angle detector detects the rotor angle of the motor based on the fundamental voltage string data, a variation of an inspection current and the data of the modulation signal in respective control cycles.

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