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All Journal IPTEK The Journal for Technology and Science Jurnal Geosaintek
Purwadi Agus Darwito
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Computer Science & IT Earth & Planetary Sciences

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A Comparison between Buck-Boost Inverter with and without Buffer Inductor Purwadi Agus Darwito; Soebagio Soebagio; Mauridhi Hery Purnomo
IPTEK The Journal for Technology and Science Vol 23, No 2 (2012)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v23i2.8

Abstract

The electric vehicle inverter requires an induction motor drive with a high output of voltage and current to reduce the number of batteries used and in turn reduce the vehicle’s weight. In this paper compared two single Phase BuckBoost Inverter (SPBBI), that is between the SPBBI conventional topology with SPBBI new topology uses a buffer inductor. The results of comparison are expected that the new inverter topology can strengthen the voltage greater than the conventional inverter topology. The inverter’s components of capacitor and inductor were reconfigured. The circuit was simulated for various carrier and signal frequencies with various load. The simulation results of the proposed topology compared with the simulation results of conventional topologies commonly used in a variety of frequency and load values. It is shown that the output voltage and current can be strengthened significantly, with a value of more than five times of the output voltage compared to the conventional inverter. The new inverter topology is useful to be implemented for the electric vehicle.
IDENTIFIKASI MISORIENTATION SENSOR SEISMOGRAF BMKG MENGGUNAKAN METODE P-WAVE PARTICLE MOTION: STUDI DI PULAU SUMATERA BAGIAN UTARA Chichi Nurhafizah; Purwadi Agus Darwito; Wijayanto Wijayanto; Hendro Nugroho
Jurnal Geosaintek Vol. 11 No. 3 (2025)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25023659.v11i3.8974

Abstract

Analisis polaritas gelombang P dapat digunakan untuk mengevaluasi keakuratan orientasi sensor seismograf. Ketidaktepatan orientasi (misorientation) berpotensi menurunkan akurasi penentuan mekanisme sumber gempa bumi. Penelitian ini menganalisis orientasi sensor seismograf BMKG di wilayah Sumatera bagian utara dengan menggunakan metode P-Wave Particle Motion. Sebanyak 58 sensor berhasil dianalisis secara kuantitatif dan menghasilkan estimasi sudut orientasi aktual. Hasil menunjukkan bahwa sensor memiliki variasi misorientation berkisar antara 1° hingga 46°, dengan 15 sensor di antaranya menunjukkan nilai misorientation signifikan, yaitu RSSM (46°), MASM (28°), PAASI (27°), SLSM (24°), TPTI (23°), GESM dan SKSI (22°), TKSM dan BESM (20°), SMSM (19°), LTSM dan TASI (18°), PDSI (17°), serta PLSI dan KASAI (16°). Temuan ini menunjukkan ketidaksesuaian arah pemasangan sensor terhadap arah utara sejati, yang dapat menurunkan kualitas interpretasi data seismik, sehingga evaluas misorientation sensor berbasis data perlu dilakukan secara berkala guna menjaga reliabilitas data seismik nasional. Penelitian ini merupakan evaluasi sistematis berskala besar pertama terhadap orientasi sensor BMKG di Indonesia dengan memanfaatkan analisis gerak partikel gelombang teleseismik, sehingga memberikan dasar ilmiah penting bagi pengembangan standar kualitas jaringan seismograf di masa mendatang.
Co-Authors Chichi Nurhafizah Hendro Nugroho Mauridhi Hery Purnomo Soebagio Soebagio Wijayanto Wijayanto