THREE-PHASE AC TO DC BUCK CONVERTER WITH SINUSOIDAL INPUT CURRENT AND UNITY POWER FACTOR

Nasrudin abd.Rahim 전력전자학회 1995 ICPE(ISPE)논문집 Vol.1995 No.10

This paper present a prototype design of the schematic diagram of the proposed three-phase power converter operated as a buck converter where the output voltage. A prototype design is tested to demonstrate low input current distortion at sinusoidal current waveform with controllable displacement factor. The power bridge configuratron consists of six controllable switches and six diodes with an additional of one freewheeling diode across the bridge voltage The simulation and experimental results are provided to demonstrate the effectiveness of the design.

Determinants of Bilateral Foreign Direct Investment Intra-ASEAN : Panel Gravity Model

Hasrat Ifolala Zebua,Nasrudin 한국유통과학회 2016 Asian Journal of Business Environment (AJBE) Vol.6 No.1

Purpose – This paper aims to find and analyze factors that determine the flows of bilateral foreign direct investment in intra- ASEAN. It specifically focuses on the dimension of macro- economic, natural resources, human resources, and the quality of governance. Research design, data, and methodology – Data were collected from 64 bilateral relations between ASEAN nations from 2002 to 2013. Panel gravity model was utilized to find factors that determine the flows of bilateral foreign direct investment. Results – Significant factors were identified that determine the flows of bilateral foreign direct investment: GDP home country, GDP host country, real interest rate, distance, and total natural resources rent. Unexpectedly, natural resources have a negative effect. Conclusions – In a situation of increasing the flow of FDI among the countries of ASEAN, the government should control the interest rates and maintain good relations with nearby countries. The negative effect of total natural resource rents implies that ASEAN countries should not depend on their natural resources to attract foreign investments.

Analysis of Indonesian Tuna Fish Export to Twelve Main Destination Countries: A Panel Gravity Model

PUTRA, I Wayan Edy Darma,NASRUDIN, NASRUDIN Korea Distribution Science Association 2023 Asian journal of business environment Vol.13 No.1

Purpose: This study purposes to analyze the determinants of the volume of Indonesian tuna exports. Research design, data and methodology: The framework was developed from the gravity model for trade, which was expanded with additional variables of competitiveness, exchange rate, and industrial share of the destination country. The data sources used in this study are UN Comtrade and the World Bank. The data used is yearly data from 12 countries in 2001-2019. The scope of the study is limited to exports to the twelve main export destinations. Panel data regression analysis is used to determine the factors that affect the volume of Indonesian tuna exports. Results: The results show that according to the theory, Indonesia's GDP has a positive effect and economic distance has a negative effect on the volume of the exports. Meanwhile, the GDPs of the destination countries are not proven to have a positive effect. However, the higher the industrial share in the country, the higher the export volume tends to be. Conclusions: The conclusion obtained from this study is that Indonesia's GDP, economic distance, real exchange rate, industrial GDP share of the destination country, and the RCA index affect the volume of Indonesian tuna exports.

Analysis of Indonesian Tuna Fish Export to Twelve Main Destination Countries: A Panel Gravity Model

Wayan Edy Darma PUTRA(Wayan Edy Darma PUTRA ),NASRUDIN(NASRUDIN ) 한국유통과학회 2023 Asian Journal of Business Environment (AJBE) Vol.13 No.1

Purpose: This study purposes to analyze the determinants of the volume of Indonesian tuna exports. Research design, data and methodology: The framework was developed from the gravity model for trade, which was expanded with additional variables of competitiveness, exchange rate, and industrial share of the destination country. The data sources used in this study are UN Comtrade and the World Bank. The data used is yearly data from 12 countries in 2001-2019. The scope of the study is limited to exports to the twelve main export destinations. Panel data regression analysis is used to determine the factors that affect the volume of Indonesian tuna exports. Results: The results show that according to the theory, Indonesia's GDP has a positive effect and economic distance has a negative effect on the volume of the exports. Meanwhile, the GDPs of the destination countries are not proven to have a positive effect. However, the higher the industrial share in the country, the higher the export volume tends to be. Conclusions: The conclusion obtained from this study is that Indonesia's GDP, economic distance, real exchange rate, industrial GDP share of the destination country, and the RCA index affect the volume of Indonesian tuna exports.

The Impact of Economic Integration and Macroeconomic on Indonesia Foreign Direct Investment (FDI): A Panel Gravity Model

Imansyah,Nasrudin 한국유통과학회 2016 유통과학연구 Vol.14 No.4

Purpose This study purposes to analyze the impact of re – -gional economic integration and macroeconomic on Indonesian FDI inflows. Research design, data, and methodology Data were col – -lected from bilateral relation between Indonesia and 21 home countries whose dominant share FDI to Indonesia from 2005 to 2013. Analysis method was conducted by panel gravity modeI to find the impact of regional economic integration and macroeconomic on Indonesian FDI inflows. Results– The empirical results show that GDP of the home country and Indonesia have a positive impact on Indonesia FDI. Distance and home country real interest rate have a negative impact on Indonesia FDI. Economic integration of European Union (EU) and Indonesia's cooperation with Japan in ASEAN-Japan Comprehensive Economic Partnership (AJCEP) have created impact of investment creation on Indonesia FDI, unfortunately, economic integration of ASEAN has created impact of investment diversion on Indonesian FDI. Conclusions– In order to increase FDI inflow to Indonesia, Indonesia government should improve the physical and social infrastructures to drive the productivity and economic efficiency. It will increase the GDP and also attract more investors. Low interest rate policy should be considered.

The Impact of Economic Integration on Indonesia Foreign Direct Investment (FDI): A Panel Gravity Model Approach

Imansyah,Nasrudin 한국유통과학회 2016 KODISA ICBE (International Conference on Business Vol.2016 No.-

The purpose of this study is to analyze the impact of regional economic integration on Indonesia FDI inflows over the period 2005 to 2013. Analysis method conducted by augmented gravity model of Indonesia FDI, based on panel data. The empirical results show that GDP of the home country and Indonesia have a positive impact on Indonesian FDI. Distance and real interest rate of home country have a negative impact on Indonesia FDI. Economic integration of European Union (EU) and Indonesia's cooperation with Japan in ASEAN-Japan Comprehensive Economic Patnership (AJCEP) have created impact of investment creation on Indonesian FDI, Economic integration of ASEAN has created impact of investment diversion on Indonesian FDI. This result implies that there was a competition among ASEAN countries in attracting FDI.

Three-Phase PWM-Switched Autotransformer Voltage-Sag Compensator Based on Phase AngleAnalysis

Muhamad Mansor,Nasrudin Abd. Rahim 전력전자학회 2011 JOURNAL OF POWER ELECTRONICS Vol.11 No.6

Many voltage sag compensators have been introduced, including the traditional dynamic voltage restorer (DVR), which requires an energy storage device but is inadequate for compensating deep and long-duration voltage sags. The AC-AC sag compensators introduced next do not require a storage device and they are capable of compensating voltage sags. This type of compensator needs an AC-AC converter to regulate the output voltage. Presented in this paper is a three-phase PWM-switched autotransformer voltage sag compensator based on an AC-AC converter that uses a proposed detection technique and PWM voltage control as a controller. Its effectiveness and capability in instantly detecting and compensating voltage sags were verified via MATLAB/Simulink simulations and further investigated through a laboratory prototype developed with a TMS320F2812 DSP as the main controller.

A Single-Input Single-Output Approach by using Minor-Loop Voltage Feedback Compensation with Modified SPWM Technique for Three-Phase AC–DC Buck Converter

Azrita Alias,Nasrudin Abd. Rahim,Mohamed Azlan Hussain 전력전자학회 2013 JOURNAL OF POWER ELECTRONICS Vol.13 No.5

The modified sinusoidal pulse-width modulation (SPWM) is one of the PWM techniques used in three-phase AC?DC buck converters. The modified SPWM works without the current sensor (the converter is current sensorless), improves production of sinusoidal AC current, enables obtainment of near-unity power factor, and controls output voltage through modulation gain (ranging from 0 to 1). The main problem of the modified SPWM is the huge starting current and voltage (during transient) that results from a large step change from the reference voltage. When the load changes, the output voltage significantly drops (through switching losses and non-ideal converter elements). The single-input single-output (SISO) approach with minor-loop voltage feedback controller presented here overcomes this problem. This approach is created on a theoretical linear model and verified by discrete-model simulation on MATLAB/Simulink. The capability and effectiveness of the SISO approach in compensating start-up current/voltage and in achieving zero steady-state error were tested for transient cases with step-changed load and step-changed reference voltage for linear and non-linear loads. Tests were done to analyze the transient performance against various controller gains. An experiment prototype was also developed for verification.

The Effect of External Shocks on Food Price in Indonesia: A VECM Analysis

Ari Nurvitasari,Nasrudin 한국유통과학회 2017 The Journal of Industrial Distribution & Business( Vol.8 No.7

Purpose – This research examines the short-run and long-run effect of external shocks (oil price and exchange rate) on domestic food price in Indonesia. Research design, data, and methodology – Three variables are used in this research. The variables are food price index, Rupiah’s exchange rate of Indonesia, and crude oil price from 1998 until 2015 using Vector Error Correction Model (VECM). Results - The increasing of oil price and the depreciation of Rupiah’s rate push the domestic food price in long-run, but do not impact significantly in short- term . The response of food price to oil prices shock and exchange rate shock are positive and persistent throughout the entire sample period. The exchange rate and oil price shocks have a small proportion explaining for the fluctuations of food price index but increasing over time. Conclusions - The policymaker should concern on solving the problem of oil price increase and depreciation of exchange rate on Indonesia’s food price as they are important factors that can affect the price stability. The government should not rely on food imports because the price is strongly influenced by the movements in the exchange rate.

Self-Tuning Fuzzy-Based Dispatching Strategy for Elevator Group Control Systems

Jafferi Jamaludin,Nasrudin Abdul Rahim,Hew Wooi Ping 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10

Fuzzy logic is recognized as an intelligent approach to complex problems demanding fulfillment of several criteria. A smart solution for an elevator group control system is one complex problem. This paper discusses a fuzzy logic dispatching strategy for elevator group control that uses a self-tuning fuzzy logic controller to tune membership functions and adjust fuzzy rule sets. Computer simulation evaluates, in three traffic peaks, the strategy’ effectiveness. The results, when compared with other strategies that use conventional controllers, show considerable overall improvements in both waiting time and riding time.