The dual-inverter fed open-end winding configuration can be categorized as a new breed of multilevel converters. The structure is simple and offers a lot of advantages. However, the development of suitable PWM schemes is more complicated, due to the availability of a large number of switching states and existence of the multiple two-dimensional planes. An overview of attempts to develop suitable modulation techniques for the dual-inverter fed five-phase machine drives recognizes that progress has been made over the past few years. This paper presents a performance comparison of three PWM schemes of the dual-inverter fed five-phase, open-end winding motor drives. The quality of the phase output voltages are compared and the adequate analyses are provided. The simulation results show that the Carrier Based Phase Disposition (PD) PWM scheme enables generation of the most excellent output voltage among the three PWM schemes. The Total Harmonics Distortion (THD) of the output voltages generated by the carrier based PWM scheme reduces by 65% and 15% on average compared to the THD of the output voltages produced by the URS PWM scheme and the decomposition PWM scheme respectively.
Mengajar teori pemrograman kepada anak-anak memiliki beberapa kesulitan. Dia membutuhkan logika berpikir yang cukup tinggi, dan metode pembelajaran yang digunakan umumnya kurang menarik bagi anak-anak. Hal ini menyulitkan usaha untuk mengubah kebiasaan anak-anak dari pengguna pasif menjadi pengguna aktif teknologi komputer. Untuk mengatasi masalah tersebut, tim yang beranggotakan staf pengajar Jurusan Teknik Elektro Fakultas Teknik Universitas Mataram telah melaksanakan suatu kegiatan pengabdian kepada Siswa Kelas IV Sekolah Dasar Negeri Model Mataram berupa pembelajaran teori pemrograman khusus menggunakan aplikasi edukasi Scratchyang mudah dipahami dan menyenangkan bagi anak-anak. Berdasarkan hasil evaluasi kegiatan pengabdian kepada masyarakat yang telah dilaksanakan diketahui bahwa penyuluhan ini telah memberikan pengetahuan kepada siswa mengenai teori pemrograman komputer menggunakan perangkat lunak Scratch. Berdasarkan penilaian terhadap hasil kreasi para siswa diketahui bahwa para siswa tersebut telah cukup memahami mengenai teori pemrograman komputer menggunakan aplikasi edukasi Scratch.
Abstract— An induction motors (IM) in many industries is used because it has several advantages, such as a very simple and strong construction, the price is relatively cheap, has good efficiency, power factor is quite good, and maintenance is easier. Besides the advantages of induction motors also have disadvantages, one disadvantage of induction motors is not being able to maintain a constant speed when there is a change in load. If the load changes, the speed of the induction motor will decrease. One method of regulating the speed of an induction motor presented in this study is the regulation of an induction motor using a carrier based PWM (CBPWM) inverter with the field oriented control (FOC) technique. The estimation of rotor rotation, torque and flux is done by carrier- based PWM technique which is given input voltage and stator current. To achieve the desired flux and torque, estimation is used as feedback in the control system. In this study, it will be simulated the induction motor speed regulation with a carrier base-based inverter using Matlab. The results obtained through simulation show the length of time to reach the reference speed for speeds of 1500 rpm and 1450 rpm is around 0.45 seconds. And THD average 2,675%.
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