Current Flowing Through It This Ensures That The Zener Voltage Will - ideal diodes the key function of an ideal diode is to control the direction of current flow current passing through a diode can only go in one direction called the forward direction quantum tunnelling or tunneling see spelling differences is the quantum mechanical phenomenon where a subatomic particle passes through a potential barrier that it cannot surmount under the provision of classical mechanics zener diodes a zener diode is a special type of diode that is used most extensively as a voltage regulator this is because in reverse bias once the reverse voltage supplied to a zener diode reaches its breakdown voltage referred to as vz the voltage across the diode remains constant at this voltage even if the current through the diode a diode is a two terminal electronic ponent with asymmetric conductance it has low ideally zero resistance to current flow in one direction and high ideally infinite.

resistance in the other summary of operation the ac mains voltage is rectified and filtered into dc the dc is then chopped up by a pair of power transistors into a string of alternating positive and negative 130 volt pulses at a frequency of 27 khz now instead of current flowing through the microcontroller s internal protection diode it flows safely through the zener diode to ground and back to the source of the overvoltage circuit operation due to the low current drawing the circuit can be supplied from 230vac mains without a transformer supply voltage is reduced to 10vdc by means of c1 reactance a two diode rectifier cell d1 d2 and zener diode d3 a transformer is a static electrical device that transfers electrical energy between two or more circuits a varying current in one coil of the transformer produces a varying mag ic flux which in turn induces a varying electromotive force.

across a second coil wound around the same core power supply to be used as an ex le in this tutorial the power supply below is the one that we ll use as a basis for this tutorial it was designed to be used with audio power lifiers but can be used for virtually anything that needs dc voltage greater than what s published 18 january 2013 updated 21 march 2019 introduction the mazilli zvs flyback driver is well known throughout the high voltage munity for its simplicity and ability to deliver 20 50 kv at high currents for a flyback transformer



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