Search Engine www.edaboard.com

33 Threads found on edaboard.com: High Current Output Inverter
The core is a magnetic inc MPP. I would go by the AT graph on the datasheet, but that is for DC....... Peak current (Idc + Iac,pk) has to be checked against saturation limits. In case of a class D amplifier or AC inverter, Idc corresponds to the low frequency peak current. MPP cores have rather high AC losses. Maximum (...)
If the voltage of an input is between the Schmitt threshold levels then the output stays at the high or low it last was at. 74xxx and 74LSxxx are old fashioned TTL logic that have inputs with a bias current that pulls them high if they are floating. They require a fairly high current to (...)
The current will be high when the output is shorted or heavily loaded. Without a load then the current is low. You have an LM7812 being fed with 12V so it will not regulate. Its minimum input is 14.5V.
Q1 and Q2 are emitter-followers that have a low input current but a high output current. Emitter-followers are not inverters. Q1 pulls its emitter high with lots of current to charge C7 then Q2 pulls its emitter low to add the charge on C7 to C8 also adding almost the 24V (...)
The "HC" logic ICs conduct a high current through them when they are linear amplifiers and the supply voltage is high. Circuit B has the inverter switching (square wave output) so it does not conduct the high current through it but circuit A has the inverter (...)
Hi, you may also consider this circuit as a 'current comparator'. Esentially, the Vout vs Vin plot will be really similar to that of an inverter, but the triggering voltage will be shifted (determined by the sizes of the devices and the bias voltage of M2). Really, the output is high impedance and the exact voltage will be (...)
where did you apply the LED load? On the AC output? Not! If core heats up with no load, likely Eddy current losses from high frequency content of transition.
Does your system switch off current through a coil by making it see high impedance suddenly? It needs to continue to generate current. high voltage spikes can result. These are probably the noise on your waveform. It might be solved by a snubber network across your H-bridge. Possible a resistor and capacitor in series.
hi elanshul, i am giving you complete solution,,,, you cant drive transistor base from the current going to led,, all u have to do is to first use a comparator ,ic741,,, now i'll tell u how comparator circuit works in ic741, when pottential at pin no.3 is greater than pin no.2 the output will be high,(10 volts) ,, now make a voltage divider (...)
For a 555, 50 mA load is too high when you feed a voltage doubler. You will need a transistor output buffer for such load. You can use a two-transistor stage, PNP/NPN, like used in audio amplifiers.
This is somewhere between a Class E PA and a DC-DC converter output stage, I guess. You definitely will want some sort of anti-shoot-through to keep from burning all your power before it gets off chip. I use "ballistic" (designed asymmetry) mostly, and just hand-fiddle the taper until it lines up right at slow/hot. I'd say you want both the final
You must go down the inverter route, as your input could be 12V and your output 15V. Also your power requirements are very high which means a linear regulator is out of the question. The best way to go would be to use one transformer with a 230V rated inverter on it with a second set of primary windings to carry the (...)
Unfortunately it will not work. That particuar type has a diode betwen it's open drain output and VCC connection will will conduct if you pull up to higher than VCC. I'm not sure if high voltage HCT parts are available but if you can change to an LS type instead, you can use either the 74LS06 or 74LS07 which are functional equivalents with (...)
Use low esr and high ripple current capacitors at P-N inputs. Connect the capacitor directly the P-N pins. It filters sharp voltage spikes created by switching action. About output filter connection: connect to each phase an inductor serially. After inductor connect a capacitor parallely. Other pin of capacitor at each phase are connected (...)
The minimum supply voltage for a CD4047 is 3V but then its output currents are too low to drive the driver transistors. A 74HC4047 if available works as low as 2.0V. The driver and output transistors have a voltage loss of as much as 5V when their current is very high. In addition to the 9V zener diode (...)
You are operating the CCFL transformer far from it's intended operation conditions. These transformers have an intentionally high leakage inductance to act as a discharge lamp ballast. To determine, if efficient operation is possible at all, one must know the intended output current.
Hi All, I have some inverter questions which I am hopeful someone can answer. Basically, I have designed and built a 230V 50Hz 3KW inverter to run off a PMA (permanent magnet alternator) putting out 400-600Hz 600-1100volts. I had a lot of problems with a pre-regulator to give a stable, constant 400V link voltage but finally solved them using
You will not be able to make the full 230 vac sinewave with a 12v to 230 vac transformer but that's not the question. What type of transformer are you using, a high frequency ferrite based or low frequency (50 hz) transformer. If using high frequency you need a good L-C output filter design based on maximum peak 50 Hz (...)
Dear friends, Anybody can share with me how to design output filter for an inverter to get sine wave voltage? Suggestions as well as reference materials would be highly appreciated. Best regards
Hi, I am testing an inverter and when I measure the output load resistor voltage using voltage probe the output is sinusoidal on the oscilloscope. But when I use a current probe to see the current through it has a lot of high frequency noise. Why does the current probe (...)