Third harmonic restraint technique for the cleaner universal motor under power controller

This paper explores the simulation technique of the harmonic current under phase angle control of a universal motor. The harmonic current generates the damage-by-fire accident of the transformer and phase advance capacitor, both of which are connected to an electric power system. This problem has warranted new standards imposed by the IEC. Comparatively, the universal motor for vacuum cleaners is powered by phase angle control by TRIAC. The key differentiator among these products is cost, a key issue in the current discussions with the IEC. Our team sought to analyze the performance of the harmonic current of the universal motor under strict analysis conditions. The result coincided with the actual measurement of the instantaneous value of the harmonic current at the time of the phase angle control. Therefore, our team concluded it is possible for developers to consider harmonics restraint and differentiation.