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What is a planar transformer? Planar Transformer Illustration A planar transformer is essentially a transformer that uses flat windings, usually on a printed circuit board, instead of copper wire to form the coils.  The PCB construction creates a different form factor that offers some unique advantages and a few tradeoffs.  What are the advantages of…

Science Quotes cettechnology.com   Here is a collection of interesting and sometimes funny quotes from scientists and engineers such as Einstein, Edison, Tesla and others.  To pause the slide show, hover your mouse over the image.  You can also navigate back  or ahead by clicking the arrows on the left or right of the image. …

Understanding Safety Standards for Standard and Custom Transformers & Magnetics There is often confusion about safety standards and approvals such as UL5085 applied to components and equipment. Engineers often know they need parts that are UL approved but what that actually means is often not understood. Products that meet UL requirements can be either “listed”…

Power Factor is defined as the ratio of real (true) power flowing through the load to the total (apparent) power in a circuit. Real power is the work performing capacity of the circuit at a particular time and apparent power is nothing but the product of voltage and current. If the power factor is low,…

CET Technology Designs a New Form Factor for a Toroidal Transformer CET Technology designed a unique toroidal transformer to meet client’s pin out specification.  Typical toroidal transformers might have a total of four connections, two for the input and two for the output.  The customer had a need for a total of 18 connections at…

CET Technology Designs a New Very High Frequency Toroidal Inductor – Common Mode Choke for MEG Scanner   MEG Scanner CET technology, experts in the design and manufacture of standard and custom transformers and Inductors was recently contracted to design a common mode choke in toroidal inductor form.  The purpose of the toroidal inductor is…

CET Technology Installs New Vacuum Pressure Impregnation (VPI) System for the Manufacture of High Performance Standard and Custom Transformers and Inductors In June 2015, CET Technology installed a new KI-600 vacuum pressure impregnation system. Such equipment greatly enhances the quality of CET standard and custom transformers and inductors. Varnish, a thermally-cured polymer resin, is used…

Switch Mode Power Supply – An “Unconventional” Design from CET Technology A typical Switch Mode Power Supply (SMPS) or switching supply has an input of ~120VAC to 240VAC and outputs a low DC voltage of say 5, 12 or 24V.  Recently, a major fire & security hardware manufacturer approached CET for a more “unconventional” supply…

CET Technology Fabricates a Low Noise Power Supply Using a New Flyback Transformer Design Originally, flyback transformers were used extensively in cathode ray tubes to horizontally control the deflection of the electron beam.  Today, they are almost exclusively used for switch mode power supplies (SMPS), specifically low power (< 100W), low cost switch mode power…

Electric vehicles charging on the streets of San Francisco  CET designs a high power common mode choke CET Technology, a leading supplier of standard and custom magnetics, has been contracted to design and build a high power common mode choke for Electric Vehicle Charging Stations (EVCS).  With the growth in popularity of battery-powered electric vehicles amongst…