Sensorless controlling apparatus of brushless motor

Details Sensorless controlling apparatus of brushless motor Sensorless controlling apparatus of brushless motor

2011-05-17

2011-05-17

Leykin, Rita (Department: 2837)

Electricity: motive power systems

Synchronous motor systems

Brushless motor closed-loop control

C318S400010, C318S400020, C318S400060, C318S636000, C363S009000, C363S010000, C073S488000, C073S514020

Reexamination Certificate

active

07944163

ABSTRACT:
A sensorless controlling apparatus for controlling a brushless motor includes a speed calculator for calculating speed of a rotor ω, an angle calculator for calculating rotor angle θ at a predetermined time interval, and an angle controller for calculating correction angle Δθ based on the current value of a d-axis current (d-axis current value id), thereby controlling the rotor angle θ. The angle calculator uses the correction angle Δθ calculated by the angle controller, the speed ω calculated by the speed calculator, a predetermined time, and the rotor angle θ calculated by the angle calculator at a predetermined time to calculate the rotor angle at the predetermined time interval. Thus, the rotor angle θ calculated by the angle calculator is converged on the true angle of the rotor.

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