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44 Threads found on edaboard.com: Zero Voltage Switching
hi, I need explanation of zero voltage switching in Induction Heating devices. Is there any special circuit used to achieve ZVS? or it is achieved via coil and matching network design? Regards
hello I am in confusion about when to use the signal of current zero crossing and voltage zero crossing. I am sure that when I switch on a relay, it is best to fire it at voltage zero crossing, but regarding switching off the relay, should I switch off it at voltage (...)
Do you mean that coil current should drop to zero before a new cycle begins? Find the proper point where you can monitor voltage (or current). Tap at that point, and it can serve as a feedback signal. This simple boost converter is a good example how to do that. It takes feedback from the node between inductor and switch. It applies it as a contro
What you probably want, is to measure each shunt at two timepoints, one where the result is "zero" (like, switch is off, right before next turnon) and then another where the voltage is significant and most stable (dead quiet in a switcher, ain't gonna happen - but pick the best, perhaps right before switch turnoff). There exist integrated shunt-a
Dear All, i am trying to simulate following circuit. When i switch on the MOSFET momentarily at zero crossing of the Iin, and measure voltage across the capacitor(C1), am i not supposed to get response resembling a square wave? I think momentarily switching the inductor at zero crossing of Iin, should flip the (...)
Well i have an assignment to make inverter using ZVS topology. i have made it before using this design. pic microcontroller will generate oscillations . ir2110 driver will be used for mosfet driver and that's all. i have made it before without zero voltage switching . I have read a lot of webste's but i have not understand this (...)
Hi, I was wondering whether switches in an inverter get rid of ringing completely by utilizing soft switching techniques. For instance suppose I have a full-bridge series-loaded resonant converter using Mosfet switches . Is it possible to eliminate ringing at the turn on and turn off instant by using zero voltage (...)
Hi, I was wondering whether switches in an inverter get rid of ringing completely by utilizing soft switching techniques. For instance suppose I have a full-bridge series-loaded resonant converter using Mosfet switches . Is it possible to eliminate ringing at the turn on and turn off instant by using zero voltage (...)
hi, How zero-voltage and zero-current switching are achieved in resonant converters? what is the working principal?
If you have a DC supply for a motor being controlled by a SCR or thyristor then switching the device off would have no effect until the current through it falls to a low value (Ihold). This would occur naturally if the DC supply was unfiltered since the voltage would fall to zero between every half cycle. If you connected a second device (...)
A better Bang for the Buck (intended pun) is to design a low voltage drop linear regulator after the buck SMPS which maintains the constant low voltage drop, while the linear regulator minimizes the ripple and has the benefit of current limit control down zero with wide BW ripple rejection and low step-load regulation error. In the old days (...)
Hi, i'm designing and realizing on prototype board a full bridge class D amplifier. The switching losses of mosfets are higher than those provided by the calculations. The DC voltage is 250V and Fswitching=50KHz Pout=150Wrms. My question is: is there in literature a ZVS class d amplifier example? Is it possible to realize it? I
Generally one uses a "diode OR" function. Connect a diode from each source to the load. Whichever source is supplying a higher voltage turns on its diode and supplies the circuit. Any sources that are not active generally supply zero voltage. In your case set the AC supply to provide a little higher voltage than the (...)
Hi all, Designed Flyback Topology based SMPS.Now want to convert SMPS in to zero voltage switching Flyback SMPS. How to design ZVS Flyback Converter? Thanks & waiting For Knowledge Enhancement,:thinker: Sachin
Power Supplies for PC's are cost reduced so much that there is no excess storage energy to sustain a missing power cycle or two, so DC drops like a brick.I dont know the dead time on your UPS AC power transfer switch.A synchronous SSR transfer switch may help reduce the glitch by switching at a zero current crossing of the generator, but not cheap
Do you have an idea of the expectable switching delay and delay skew of mechanical contactors? Review data sheets and reconsider the idea of switching electromechanical relays synchronous to zero crossing.
I need to switch between 0v to 20kv. I was fooling around the internet, but I am not sure what to use. I need a short pulse, like for 1 second it should be ON and then goes to zero. Not more then 1 second. Can anyone suggest me something what to use? Of course I dont have budget for $300-400 devices :-(
I am making a solid state relay using mox3040 zero cross detection and BTA12-600 Triac, The purpose of this Project is to switch the power source on failure in minimum possible time, For failure detection, I am using ADC of 18f452, by sampling whether the power is fail or not , In general we know that its best to switch On triac when voltage
switching off a DC current powered by a high voltage source produces an electric arc much stronger than in case of AC. In case of AC, the strength of this high electric field that is built between the switch contacts (to cut off the current) is reduced automatically when the AC voltage (its absolute value) decreases and crosses (...)
Hello, I am hoping that somebody can help me out. I am trying to simulate a power supply in Ltspice and I am having a problem This power supply is a zero voltage switching isolated full bridge converter. It take 18-30Vdc in and outputs 165V at 120W (0.7A) The problem that I am having is that the regulation poor. Also when the (...)