Electrical redesign for Cement Manufacturer Association of the Philippines

Our Freelancer worked on the Electrical redesign of the building of Cement Manufacturer Association of the Philippines. The design works includes the details for installation of the grounding system and rewiring of  tapping to Genset. The project was successfully closed on July 2016.

Design and Analysis of PowerMount Comm. Structures

Design and Analysis of PowerMount Comm. Structures  for T-Mobile of MDL Engg Soln Inc.  a client from USA.

Power System Study of 3x135 MW CFB Thermal Power Plant FDCMPC

Our freelancer has undertaken Power System Study for 3x135 MW CFB Thermal Power Plant of FDCMPC in Cagayan De Oro, Misamis Oriental in the Philippines. The scope of the project are Load Flow, Short Circuit Analysis and Motor Starting Analysis.

Generator excitation control operation

Increasing the output voltage of a generator is achieved by adjusting the magnitude of the excitation current. This happens because as DC current is increased, the rotating magnetic field increases thereby increasing the generator  voltage induced in the stator conductor.     As the voltage is increased, the generator will transfer more MVAR into the power system.

Instead of collector rings, suppose that a  brushless generator above  is used in our example. The exciter is provided from the DC winding which is wound in the stator. The rotor produces ac current that is feed into the rectifier built in the shaft. The rectifier converts AC to  DC and feed the rotor windings.

To control of the rectifier  output in the field windings of the excitation generator, voltage regulator receives its command signal from the AC voltage controller which monitors the ac voltage of the monitor.


The limitation of the generator due to current in the stator should follow within the machine capability curve. Increasing the excitation current of the generator to deliver MVAR will produce heating in rotor winding. alternatively, if the excitation is reduced voltage and VARS will fall. then the machine will have weak magnetic field .

Technical Data for Generator 60WX18Z-090 with Static Excitation 158,8 MVA 13800 V 60 Hz p.f. = 0,85 Tcg = 33 °C Temp.-Cl. = 130(B

In the capability curve, the horizontal axis is the  reactive power in per unit quantity, where 1 pu =159 MVAR and the vertical axis is the active power per unit quantity.

EEWeb Website of the Day April 2, 2012

This blog is featured in EEWeb - Electrical Engineering Community, as website of the day for April 2, 2012. This is an excellent recognition from a popular electrical engineering community website for hardware engineers. I'm happy and honored that this blog was on the front page of the EEweb  and was included in the list of impressive websites  that EEweb has recognized in the past.

Thank you EEWeb!

Update: 2013
The old name of this website was "Mathematics and Engineering Topics" and now changed  to "EngineerMaths.com". The change was due to transfer of this website from free domain to a premium domain name. Every articles and feeds will be automatically redirected  into our new domain. For example, when you visit our old address [Mathematics and Engineering Topics], it  will redirect you to our new address.

Screenshot of Enginering and Mathematics Topics in EEweb

Screenshot of EEweb home page