transformer

I am a bit new in power electronics, and I made this PCB to control a heating element using burst fire control mode. I am using a burst window of 20 half periods and in the two scope screenshots I am sending a burst of 10/20 half periods. Everything works great when driving a resistive load...

Hello. I bought two electronic transformers (220VAC -> 12VAC) to power GU5.3 LED light bulbs that are installed on my suspended ceiling. The two modules are brand new. When connecting a light bulb, it doesn't light at all. When trying to measure the secondary with my multimeter, I don't have...

This is the magnetics connection in my design. This PCB circuitry has been tested and working individually, but when I connect two or more of the same PCB hardware to an ethernet switch, the subsequent hardware would not be able get physical link over ethernet, only the first one connected would...

Hi, I have a 1993 Honda and it needs a new fusebox because essentially that year used a built-in ELD sensor that is essentially a mini transformer used for current sensing and the sensor died. I am hesitant to just go to a junkyard without knowing how to properly test a fusebox to make sure...

Hi everyone, I'm working with a step-down transformer and have encountered a few surprising characteristics in its construction that I would like to understand better. I would really appreciate any insights into why it might be designed this way. Transformer Specifications: Primary Voltage...

Hi, I am looking for some advice on wiring a single phase, 2 speed motor to an autotransformer 5 position speed controller. I have this fan: Helios SVS125B – Single phase, 2 speed And an ATC1-1.5A, 5 position speed controller. Wiring Diagrams: Fan: The motor side is already pre wired and...

i made a hand made transformer and wanted to ask the forum how and with what should I power it. And will it even work.

Hi all, I have decided to post my question with my calcs following his example on page 7-21 of colonel mclymans book (he design a multi-output, I will design a single output). It has been a while since I have looked into transformer design and I will most likely reread the book with more...

Hi Good afternoon all. My smps HF transformer secondary output is 12 volt 33 amp. I want to increase voltage 24 volt . ampere 5 amp is sufficient for me. Can i increase the secondary turns. Secondary has multi strand, so can i do half the strands and double turns. Or do i need to rewind primary...

Hi, I have been reading a lot about flyback driver circuits for generating high voltages. Tutorials on Youtube are a dime a dozen describing minimalist circuits to drive automotive ignition coils and similar. However these tutorials rarely describe the underlying design theory and considerations...

Hello all, I am designing a CCPS and using a phase-shifted, series-resonant bridge as the switching topology. There is a DC block capacitor in series with the transformer primary winding. When the target voltage is reached, the H-bridge switches are turned off until a command for the next...

Greeting Guys, Please advise me to get the best power source for the deadbolt / electronic gate lock system... I want to get the following: - 12v Fixed voltage 2-3/+- volt no issue - 2 amp peak when required at once - Compact Size if possible I am confused about using LED Driver 220vac...

Hello friends, i have an old kodak rechargeable battery charger but nowadays we mostly have Li-ion batteries. I had got this charger with a digital camera. It clearly states to use only NiMH batteries, but i don't have any NiMH batteries and so this charger isn't in use since a long time. I am...

Hello, I need help identifying this transformer from a LED driver. 45C389J41 P.S. Why can I almost never find anything online from the markings on these small yellow transformers.

Recently purchased this product: Amazon.com: Aramox High Voltage Generator, AC 220V High Voltage Generator Module Continuous Igniter ≥12kV 1A‑2A : Tools & Home Improvement When I plugged it in it did not work. I opened it up and made the circuit in LTSpice. I don't understand the circuit and...

hi! need you help I Have 3 transformes of 100KVA each 34.5Kv Primary to 120/240V in secondary I have a load of 160 KVA, 3P, 480V, so I need to get 480V in the secondary of my transformers, how can I get tthat voltage, what conextion I have to use delta-wye delta-delta PLEASE HELP ME

Hello, I have a schematic of a flyback power supply that i am trying to design a pcb for. But i couldn't find any part number for the transformer in the attached image.. Can someone teach me how to find the right part number for transformers? Or help me find this particular one with the...

I have treadmill pcb board in that board controller is not working. I found out the problem that transformer inside pcb is not working. Checked the resistance and continuity i found short. I don't know the value of transformer. Nothing is mentioned on it. I have checked in new pcb online. I...

I am constructing a filter unit that is intended to allow visualisation (on a scope) and measurement of high-frequency interference on 240v UK mains by means of a high-pass filter to remove the 50 Hz component. What would be the best (and safest) circuit to isolate the unit from the mains while...

Hello, Can someone please explain how to know which pins are for the primary coil, the flyback coil and the HV ground. I have measured the resistance between all the pins and get either 1.5 or 0.5 ohms and nothing in between. Also, using the method where a 24v supply is connected, I was...