<論文>ニュートラルネットワーク角度推定器を用いたステッピングモータ励磁タイミングの調整

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In the drive of a stepping motor, it is well known that rotor oscillation at the natural frequency causesharmful phenomena like low-frequency resonance, acoustic noise, etc. Electrical damping techniques in whichthe switching sequence of each phase is changed in respective manners are often used for avoidance of suchproblems. In these methods, the exciting period of each phase must be tuned appropriately, and severaladaptive methods for on-line tuning of the exciting period have been suggested.The authors suggest the method for estimation of rotor angle from the data of exciting currents in statorwindings using a feedforward neural network, with the regulator type on-line tuning method for half-step typedamping sequence. In this method, direct detection of the rotor angle can be omitted, and the advantage ofnon-sensor drive of a stepping motor is maintained. It is demonstrated experimentally that the exciting periodis tuned appropriately and rotor oscillation is suppressed by this method under the driving conditions withdifferent inertial loads which causes the variation of oscillatory characteristic.
秋田大学の論文