AUTOMATIC RECOGNITION OF ARMATURE CURRENT OF DC MOTOR WITH APPLICATION OF FFT AND GSDM

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It was assumed that each group of three loop rotor coils is shorted through resistance Rbz = 7.7 m.The DC motor connected with external resistance produced the load torque. The additional resistance were used in short-circuit to avoid damage of rotor winding.Investigations were carried out for signal of armature current of faultless DC motor and armature current of DC motor with shorted rotor coils (Fig. 6 and Fig. 7).Five half-second samples were used in pattern creationprocess for each type of signal. There were used 100 samples of armature current of faultless DC motor and 100 samples of armature current of DC motor with shorted rotor coils. These 200 samples were used in identification
process.