What is PIV value of full wave rectifier?

Peak inverse voltage (PIV) is 2Vmax in center tapped full wave rectifier (but it is Vmax in full wave bridge rectifier). By using a center tapped transformer we are creating two AC sources which are out of phase by 180° ( Vao and Vbo ) but with same amplitude of Vmax.

Why PIV is 2vm?

The minimum required PIV is 2 * Vp where Vp is the peak input voltage if there is a capacitor output filter, because the capacitor holds Vp (minus diode drop) whilst the input voltage goes to -Vp on the negative input cycles. The voltage the diode must stand off is thus 2*Vp.

What is full wave rectifier with filter?

Full Wave Rectifier with Capacitor Filter. The main function of full wave rectifier is to convert an AC into DC. As the name implies, this rectifier rectifies both the half cycles of the i/p AC signal, but the DC signal acquired at the o/p still have some waves. To decrease these waves at the o/p this filter is used.

What is the use of capacitor filter in full wave rectifier?

But in full wave rectifier, both positive and negative half cycles of the input AC current will charge the capacitor. The main duty of the capacitor filter is to short the ripples to the ground and blocks the pure DC (DC components), so that it flows through the alternate path and reaches output load resistor RL.

How does a capacitor act as a filter in a full wave rectifier?

Once the rectifier reaches to negative half cycle, the diode acquires reverse biased & stops letting the flow of current through it. Throughout this, the supply voltage is low then the voltage of a capacitor. Thus the capacitor releases all the stored current through the RL.

What is PIV of half wave rectifier and full wave rectifier?

A circuit of half wave rectifier requires only 1 diode. For half-wave rectifier, it is about 1.21 but for full wave rectifier, it is 0.482. The peak inverse voltage in case of half wave rectifier is equivalent to the maximum value of applied input voltage.