Method of brushless DC motor control and its application

Details Method of brushless DC motor control and its application Method of brushless DC motor control and its application

2006-02-08

2011-12-13

Ro, Bentsu (Department: 2837)

Electricity: motive power systems

Induction motor systems

Primary circuit control

C318S400010, C318S400340, C318S432000, C318S459000, C318S500000, C318S599000, C318S700000, C318S810000, C318S811000, C318S812000

Reexamination Certificate

active

08076898

ABSTRACT:
The invention relates to electric engineering, in particular to methods for controlling an ac electronic motor. The inventive control method consists in starting and rotating a rotor upon EMF signals in current-free sections of an armature winding, in converting the EMF signals into discrete logical level signals by a normalizer, in detecting switching points by means of a microcontroller and in displacing said points according to a load current quantity, the rotor speed of rotation and the inductance of the armature winding sections, wherein the switching points are calculated and displaced with respect to bridging times of the free sections EMF whose voltage levels are different from zero. The inventive device is characterized in that it comprises a reference level displacing unit (26), which is arranged in the normalizer between a divider22and a comparator unit (23) and which consists of a current sensor (27), a voltage sensor (27), two adders (29, 30) and an inverter (31).

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