Tishitu's video: Half Wave Rectifier

Half Wave Rectifier In Half Wave Rectifiertype, only one diode is used. Generally, a step-down transformer is used to provide the required secondary voltage. The transformer isolates the load from the line. This reduces the possibility of electric shock.In the positive half cycle of secondary voltage, the diode is forward biased for voltages greater than the offset voltage. The offset voltage is 0.7 V for silicon diodes and 0.3 V for germanium diodes. This produces a half sine wave of voltage across the load resistor. In the negative half cycle, the diode is reverse biased. The load current drops to zero. The load current is always in the same direction. This provides rectification. Average Voltage = Vdc = Vp/π = 0.318 Vp Where, Vp = peak value of voltage across secondary. The value of direct current, the diode can handle is called as ‘Current rating of diode’ (Io). Peak Inverse Voltage – In the negative half – cycle, the diode is reverse-biased. All secondary voltage appears across the diode. The maximum negative (reverse) voltage appearing across the diode is called the ‘Peak Inverse Voltage’ (PIV). To avoid break down, the PIV must be less than PIV rating of the diode. For half wave rectifier PIV = Vp. Maximum efficiency of half wave rectifier is 40.6 %. Advantages and Disadvantages of Half wave rectifier: A half wave rectifier is rarely used in practice. It is never preferred as the power supply of an audio circuit because of the very high ripple factor. High ripple factor will result in noises in input audio signal, which in turn will affect audio quality. Advantage of a half wave rectifier is only that its cheap, simple and easy to construct. It is cheap because of the low number of components involved. Simple because of the straight forwardness in circuit design. Apart from this, a half wave rectifier has more number of disadvantages than advantages! Disadvantages of Half wave rectifier: 1. The output current in the load contains, in addition to dc component, ac components of basic frequency equal to that of the input voltage frequency. Ripple factor is high and an elaborate filtering is, therefore, required to give steady dc output. 2. The power output and, therefore, rectification efficiency is quite low. This is due to the fact that power is delivered only during one half cycle of the input alternating voltage. 3. Transformer utilization factor is low. 4. DC saturation of transformer core resulting in magnetizing current and hysteresis losses and generation of harmonics. The DC output available from a half-wave rectifier is not satisfactory to make a general power supply. However it can be used for some applications like battery charging. ____________________________________________ JJD - Adventure [NCS Release] this music is provided by NCS, the link to the track is https://www.youtube.com/watch?v=f2xGx... _________________________________ Download Files From Link:- http://www.mediafire.com/file/t5lv7ms3lwzlpf6/half_wave_rectifier.zip _______________________________________ TISHITU ISO: 9001-2008 RESEARCH AND CONSULTANCY CELL OF INDUSTRIAL APPLICATION A Joint Accreditation System of Australia and New Zealand Copyright © All Rights Reserved www.tishitu.org Reg No.08122629691/SSI Accreditation No. M3111204IN -~-~~-~~~-~~-~- Please watch: "Lifi Communication by Arduino UNO Download Project" https://www.youtube.com/watch?v=c4gC8dbaiZg -~-~~-~~~-~~-~-