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What are the advantages and dis advantage of full-wave bridge rectifier compared with two diodes rectifier?
Omaraltae
in full wave bridge rectifier, the input and out put voltages are same but in case of two diode rectifier the input and output voltages can be different as per requirement a there is a transformer in the circuit.
The former is lighter and the later is heavier.
Wiki User
∙ 12y ago
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Why in 4 diode full wave rectification you use bridge?
bridge is use in 4 diode fullwave rectification to allow complete cycle so that there will an output DC for both the positive and ndgative half-cycle of the input AC.
How does a centre tapped fullwave rectifier conducts?
If one have a centre tap transformer you only need two diodes to get full wave rectification, the anode of the both diodes to the two outside taps the cathodes together will form your Negetive and the centre tap is your Possitive
Derive an expression for efficiency of full and half wave rectifier?
The efficiency(n) of fullwave rectifier is defined as: n=DC output Power/AC input power But Power=V*I n=Vdc*Idc/Vrms*Irms But Vdc=2Vm/pi,Idc=2Im/pi ,Irms=Im/root(2),Vrms=Vm/root(2) (Im:Peak Curent) n=(4Vm*Im/pi^2)/(Vm*Im/2)=8/pi^2=0.812=81.2%. So efficiency of full wave rectifier is 81.2%
Why do ripples reduce in full wave rectifier as compared to half wave rectifier?
Ripple factor (γ) may be defined as the ratio of the root mean square (rms) value of the ripple voltage to the absolute value of the dc component of the output voltage, usually expressed as a percentage. However, ripple voltage is also commonly expressed as the peak-to-peak value. This is largely because peak-to-peak is both easier to measure on an oscilloscope and is simpler to calculate theoretically. Filter circuits intended for the reduction of ripple are usually called smoothing circuits.The simplest scenario in ac to dc conversion is a rectifier without any smoothing circuitry at all. The ripple voltage is very large in this situation; the peak-to-peak ripple voltage is equal to the peak ac voltage. A more common arrangement is to allow the rectifier to work into a large smoothing capacitor which acts as a reservoir. After a peak in output voltage the capacitor (C) supplies the current to the load (R) and continues to do so until the capacitor voltage has fallen to the value of the now rising next half-cycle of rectified voltage. At that point the rectifiers turn on again and deliver current to the reservoir until peak voltage is again reached. If the time constant, CR, is large in comparison to the period of the ac waveform, then a reasonably accurate approximation can be made by assuming that the capacitor voltage falls linearly. A further useful assumption can be made if the ripple is small compared to the dc voltage. In this case the phase angle through which the rectifiers conduct will be small and it can be assumed that the capacitor is discharging all the way from one peak to the next with little loss of accuracy.[1]
What is the difference between full wave rectifier and half wave rectifier?
Alternating current (AC) consits of positive half cycles interspersed by negative half cycles. A half-wave rectifier uses only one of these; during the other part of the cycle the output is zero. Only one diode is needed. A simple full-wave rectifier is fed from a center-tapped transformer. It outputs each half cycle in turn; since they are taken from opposite ends of the transformer they all have the same polarity. Two diodes are needed, but it is much easier to get a smooth continuous output from this rectifier. The best of the systems is a full-wave bridge rectifier. Difficult to describe in words, it uses four diodes and doesn't need a center-tapped transformer.
Does the commutator of a DC machine act as a half-wave rectifier?
No.It act as fullwave rectifier
Is there any application where a center tap rectifier is preferred over a bridge type rectifier?
yes, where only 2 diodes can be used for fullwave rectification. this was the case with vacuum tube power rectifiers (e.g. 5U4 & type 80). these tubes shared a common cathode between 2 plates, the plates were connected to the ends of the secondary, the cathode supplied the rectified B+ voltage to the filter, the centre tap was grounded.
What is an full wave rctifier?
A fullwave rectifier takes A.C. voltage and makes low ripple D.C. out of it. The next step is a capacitor to smooth the D.C. and reduce the ripple. The rectifier is typically made of four diodes arranged in a diamond shape.The two cathode/anode junctions of the bridge takes in the A.C. and conducts the positive part of the A.C. to the two cathodes junction and the negative part to the two anodes junction configured diodes.
Formula for peak inverse voltage?
piv:the maximum value of reverse voltage across a diode that occurs at the peak of the input cycle when the diode is reversed-biased.
Guyz how much voltdrop do you expect to get when measuring across 1 of the fwd biased Si diodes when the circuit is a fullwave bridge rectifier if supplied with 12Vac load being 3673 ohms?
A; engineers assume .6 to .8 volts depending on current flow however Boltzmann constant can be applied if the current is fixed otherwise back to assuming.
Why in 4 diode full wave rectification you use bridge?
bridge is use in 4 diode fullwave rectification to allow complete cycle so that there will an output DC for both the positive and ndgative half-cycle of the input AC.
How does a centre tapped fullwave rectifier conducts?
If one have a centre tap transformer you only need two diodes to get full wave rectification, the anode of the both diodes to the two outside taps the cathodes together will form your Negetive and the centre tap is your Possitive
What important system consisting of diodes in converting ac to dc?
Halfwave or fullwave or polyphase AC to DC?
What are the following vacuum tube types - 45 - 80 - 125A - 1C5 - 5Y3 - 5U4 - 12SA6?
45 - triode power amplifier 80 - fullwave rectifier 125A - - can't find data 1C5 - pentode power amplifier 5Y3 - equivalent to 80 5U4 - higher-rated version of 80/5y3 12SA6 - - can't find data - did you mean *12sa7* pentagrid converter
Derive an expression for efficiency of full and half wave rectifier?
The efficiency(n) of fullwave rectifier is defined as: n=DC output Power/AC input power But Power=V*I n=Vdc*Idc/Vrms*Irms But Vdc=2Vm/pi,Idc=2Im/pi ,Irms=Im/root(2),Vrms=Vm/root(2) (Im:Peak Curent) n=(4Vm*Im/pi^2)/(Vm*Im/2)=8/pi^2=0.812=81.2%. So efficiency of full wave rectifier is 81.2%
Why do ripples reduce in full wave rectifier as compared to half wave rectifier?
Ripple factor (γ) may be defined as the ratio of the root mean square (rms) value of the ripple voltage to the absolute value of the dc component of the output voltage, usually expressed as a percentage. However, ripple voltage is also commonly expressed as the peak-to-peak value. This is largely because peak-to-peak is both easier to measure on an oscilloscope and is simpler to calculate theoretically. Filter circuits intended for the reduction of ripple are usually called smoothing circuits.The simplest scenario in ac to dc conversion is a rectifier without any smoothing circuitry at all. The ripple voltage is very large in this situation; the peak-to-peak ripple voltage is equal to the peak ac voltage. A more common arrangement is to allow the rectifier to work into a large smoothing capacitor which acts as a reservoir. After a peak in output voltage the capacitor (C) supplies the current to the load (R) and continues to do so until the capacitor voltage has fallen to the value of the now rising next half-cycle of rectified voltage. At that point the rectifiers turn on again and deliver current to the reservoir until peak voltage is again reached. If the time constant, CR, is large in comparison to the period of the ac waveform, then a reasonably accurate approximation can be made by assuming that the capacitor voltage falls linearly. A further useful assumption can be made if the ripple is small compared to the dc voltage. In this case the phase angle through which the rectifiers conduct will be small and it can be assumed that the capacitor is discharging all the way from one peak to the next with little loss of accuracy.[1]
Fullwave center-tap rectifier theory?
The Center-Tapped Full-Wave RectifierA center-tapped rectifier is a type of full-wave rectifier that uses two diodes connected to the secondary of a center-tapped transformer, as shown in Figure (a). The input voltage is coupled through the transformer to the center-tapped secondary. Half of the total secondary voltage appears between the center tap and each end of the secondary winding as shown.Read more: http://www.daenotes.com/electronics/devices-circuits/center-tapped-full-wave-rectifier#ixzz2IVoFQ5erFor a positive half-cycle of the input voltage, the polarities of the secondary voltages are as shown in Figure (a). This condition forward-biases diode D1 and reverse-biases diode D2. The current path is through D1 and the load resistor RL, as indicated. For a negative half-cycle of the input voltage, the voltage polarities on the secondary are as shown in Figure (b). This condition reverse-biases D1 and forward-biases D2. The current path is through D2 and RL, as indicated. Because the output current during both the positive and negative portions of the input cycle is in the same direction through the load, the output voltage developed across the load resistor is a full-wave rectified dc voltage, as shown.Read more: http://www.daenotes.com/electronics/devices-circuits/center-tapped-full-wave-rectifier#ixzz2IVoev4Vf
