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As the fluctuation of sub-module capacitance voltage when MMC operates at low frequency, the application of MMC in the field of motor drive has been limited. Therefore, this paper proposes a low frequency control method for the MMC with tuned filter circuit. Based on the theoretical analysis for this tuned filter, the circulating current of 2nd frequency could be suppressed effectively at rated frequency...
In this paper, we perform the comparison study of ECG signals for subjects at distinct ends of cardiopulmonary fitness. The cardiopulmonary signals were acquired under rest condition, three graded exercise intensities, and recovery periods. The participants were recruited from university freshmen with cardiopulmonary fitness norm in top, middle, and bottom groups. Spectral analysis was performed to...
This paper presents an inertial-sensing-based vibration analysis and suppression system for laser galvanometers. The functions of this system are to measure the vibrations during rotation motions of galvanometers and to design a comb filter for restraining the vibrations of the galvanometers effectively. The proposed system is composed of an intelligent motion control platform, a servo driver circuit,...
A dual-band bandpass filter using parallel doubly coupled structure with loading capacitance is designed for dual-band applications at 17/35 GHz. New coupling structure is proposed to replace the normal counterparts. It can provide two passband respectively in Ku-band and Ka-band. By using the capacity-load structure, the slow-wave effect occurs in this filter, which can reduce the circuit size and...
A novel dual-mode bandpass filter using microstrip SIR is presented. It is composed of step impedance square ring and designed at the operating frequency of 36 GHz with a bandwidth of 1.8 GHz. The filter has a size reduction of approximately 30%, in comparison with the conventional square ring filters. It also has a good return loss. Within the passband, S11 is bellow -20dB. Because of the step impedance...
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