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24 Threads found on edaboard.com: Output Noise Inverter
I've just tested my 2kW pure sine wave inverter and it's working just fine except a powerful audible noise from the LF (50Hz) output transformer. I'm using a sPWM driven H-bridge to convert 24V DC to 16V AC then I'm using a step-up LF transformer to rise the AC to 230V. The transformer is from a broken UPS (APC Smart-UPS 1500). I'm (...)
hey guys, I'm an undergrad in software engineering and I'm doing my final year project. I'm trying to power up a monitor and a Beaglebone Black from the car. I have used a 100W inverter for the monitor and a LM2596 regulator for the BBB. And the LM2596 is a switch mode power regulator. Check diagram. 104981 But I d
Hello, I have connected the dc-dc converter of 181 Vdc to the inverter, the noise from the transformer has stopped and there is no flickering and I get an ac output but it is low like about 20 V-AC and a 20W bulb connected at the output with 14.9V input and about 12 V-AC with 12V input with no load I get about 22 V-AC. (...)
Hi all, I am tesiting a full bridge inverter with LCL filter. I am getting noisy waveform at the load (R = 300ohms). The yellow one is load voltage while the green one is voltage across capacitor. Switching fr
Hello, we're using TC962 to generate -15V from a +15V positive regulator. The negative voltage is used to supply 2 general purpose opamp and a differential output amplifier (THS4151). The TC962 current output is about 23mA. The problem is that we are observing a little noise coupled ond our output that is caused by (...)
To connect the output to the UART pin of a processor, a basic inverter gate (e.g. 74HC04) would be a simple solution.
I appologize i am unable to understand your requirement clearly: do you want to convert sinosoidal output of an oscilator to square wave clock output with minimal phase noise/jitter?
Not necessarily but it highly depends what you need. The extra inverter will yield a propagation delay with respect to original clock so the transition edges will not exactly line up. If you need matched timing then use higher clock input and divide output with flip flops. Other potential degradation is noise performance and/or additional (...)
It is probably used to filter out any noise or spike in the UPS output. You can try with capacitor values of 0.1uF, 0.22uF and 1uF. The value itself shouldn't be too critical. You can use the 3 values mentioned and try. Observe the output on an oscilloscope to see if you can detect any spikes or noise and adjust the value (...)
i have make inverter with unipolar pulse width modulation. the signal switching is 3Khz on 50 Hz as frequency fundamental. The harmonic occur in 6Khz.what happen if i use single phase motor as load. what the diiference about low order harmonic and high orde harmonic?thanks...
hi, i have simulated a two stage diff ring oscillator in mentor graphics tool. i have to connect inverters at the two o/p terminals to get + and - output .if i donot connect inverters i dont get output.but while doing sst noise analysis i get the error tht inverter gate is not (...)
Available speed is a matter of motor design and inverter output voltage. Within a regular parameter range, it doesn't depend on PWM frequency. PWM frequencies of 16 kHz or above are preferred for small drives to reduce the noise pollution. But losses are slightlly higher. Surely no VFD (variable frequency drive) is using a PWM (...)
Dear Babinton, Study this application note, hope this will help you. This is not a "pure sine wave" design. There is no filter inductor in AC output. Modified sine wave does not require output filter choke. The inductor used is with DC rectification
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 show a lot of noise when the voltage (...)
I have circuit that has an analog output and that analog output is single ended, i mean negative of the analog output is connected to the ground. When an inverter runs with this line connected via a long cable, some noise is conducted through these lines into my circuit. Using a shielded cable mostly (...)
I want to simulate the noise margin of inverter with in the following figure, I want to find the input voltage at which the output slope is -1(point A and B). Can anyone tell me how this is realized in Hspice?
add a block of MIXER and feed the input from noise Gen. block and original Signal Gen. block. . Now utilize the output with rest of the circuit.
Can any body tell material about ac coupling of single ended input (32Khz) . A capacitor in series with self biased inverter(resistor connected to in and out of the inverter) works as a ac couple circuit. I want to know how power supply noise can effect the output. And how to set the bandpass limits? Is design (...)
generally switching transistors cause glitch due to kickback noise and clock feedthrough and hence these are generally separated from the input and output using a transistor which is always on......
AA, In GHz range the signal rise & full times is large, so the clock will be not much affected if it's generated as sinusoidal & then it passes through chain of inverter to work as buffer, then it will be likely square wave. Many PLL clock generators use LC VCO for its low phase noise performance, however its output is sinusoidal I hope (...)


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