Category Archives: academic
A good explanation on Fast Charger for Smartphone
High Input Impedance and Low Output Impedance. Kenapa?
Amatlah penting untuk sesuatu sistem mempunyai high input impedance dan pada masa yang sama perlu mempunyai low output impedance. Tapi kenapa ye? Dah bertahun tahun saya cari jawapan..akhirnya berjumpa jua dengan jawapan yang praktikal.
Secara umum ini berkaitan dengan dengan kesan stabiliti sesuatu sistem. Artikel dari Marco Panezza ini (2010) menerangkan dengan baik sekali dengan menggunakan dc-dc converter.
Publication 2021
Alhamdulillah. I am relief….today received a good news. My publication in IET Power Electronics was accepted. A review was quite though with 6 reviewers that comments on the novelty of the proposed multi level topology.
Since 2018, that research topic is blooming with a lot of topologies came year after year. The area was to search for a good and well-balanced topology that can generate a high number of output voltage level but at the same time has a low number of the power switch and low total standing voltage. The big challenge here is to have a low Total standing voltage.
Another comments is on the applications of the proposed topology since the topology use asymmetrical dc sources.
IET Power Electronics is is Q2. So for this year (till March 2021 and more will come), i have published:
- IEEE Access – Q1
- International Journal on Circuit Theory and Application – Q3
- IET Power Electronics – Q2
- IJPEDS -SCOPUS
Kemasukan Pelajar UTM Sesi 2020/21 (II)
Mungkin ada yang tertanya tanya bagaimana flow kemasukan pelajar untuk semester akan datang..ok saya panjangkan
Mendeley Workshop
Mendeley is a smart tool to assist students and researchers to manage their references. Unlike EndNote, this tool is free of charge and was acquired by Scopus several years ago. Alhamdulillah, manage to conduct workshop on Mendeley with my old friend Ts Dr Shafie Bakar and Mrs Affida, both form UMP.
I learnt a lot of things too during the workshop.
Inverter Circuit Driver
For a simple and cheap circuit driver to obtain a simple ac output voltage, one can use IC SG355. However this chip is only capable to generate square wave output.
Micro-Inverter WVC1200
Micro-inverter is usually an inverter circuit that requires grid connection to operate. The target of using this micro-inverter is not on to 100 powering the load. It is most likely to reduce the energy bill by injecting active power generated from the solar to the grid directly using 13A socket plug
LPPT 2021
baru je Bulan 2 2021, tapi dah mikir pasal LPPT 2021 punya markah? hahaha
KPI UTM bagi saya adalah tinggi dan banyak kekangan dari segi menarik pelajar yang bagus untuk buat penyelidikan. Banyak pelajar yang bagus akan memlih universiti di sekitar Kuala Lumpur.
Tapi, apakan daya..untuk maju dan bangkit, kita kena senantiasa mempunyai fikiran yang positif! Anggap semua ini untuk kemajuan diri sendiri.
Saya masih mencongak sama ada untuk kekal dalam track teaching atau bertukar ke track research. Ada pro dan cons untuk kedua dua track ini. Saya lebih berat kepada teaching kerana research saya yang masih saya anggap belum sustainable.
Bayangkan bagaimana kita mampu menulis dan menerbitkan penulisan jurnal Q1 dan Q2 yang banyak dalam setahun? Pasti seorang tak mampu bukan? OK untuk ini, itulah guna networking di kalangan penyelidik. So untuk dapatkan network yang baik, di mana ramai penyelidik mahu bersama sama menerbitkan penulisan, kita mest built-up the reputation dahulu which is akan memakan masa.
Alhamdulillah untuk tahun 2021, ni saya telah ada satu paper Q1, 3 paper Q3 dan insyaAllah satu lagi paper Q1 yang dalam 2nd revision untuk penerbitan dalam IET Power Electronics.
Bagaimana saya boleh terbitkan banyak penulisan Q1 dan Q2 walhal baru bulan feb 2021? Ya..jawapan nya adalah networking!
Micro-Inverter
What’s good about AC Panels and micro inverters?
There are a number of complexities caused by the traditional way of connecting solar panels together (in a series string) which Micro Inverters can help overcome including:
High Voltage DC
High Voltage DC produced by a series string solar power system can create a risk of very high temperature arcing and potentially fire. Because micro inverters convert to 240V AC, the potential for this to occur is greatly minimised.
Switchgear
High voltage DC requires relatively expensive protective switches and fuses. By using AC, switchgear is more commonly available and thus cheaper.
Shading
To make this all a little more entertaining, I’ve put together a video discussing shading and solar panels. If you don’t particularly feel like watching, feel free to skip it and just read the summary below.