Half-wave rectifier circuit, Full-wave rectifier circuit

・In Japanese
Premise knowledge
・Alternating current
・AC-DC converter

■What is a rectifier circuit?

A rectifier circuit is an electric circuit that converts alternating current to direct current, and is used in AC-DC converters. Rectifier circuits include half-wave rectifier circuits and full-wave rectifier circuits.

＜Half-wave rectifier circuits＞

By adding a diode as shown below, only one side (half wave) of the voltage is rectified, and the voltage fluctuation can be suppressed to some extent by a capacitor. However, with this method, only half waves can be extracted, so efficiency is poor, and voltage fluctuations (this voltage is called ripple) cannot be completely suppressed with capacitors alone.

＜Full-wave rectifier circuit＞

By adding another diode as shown below, it is possible to rectify the full wave, and the ripple can also be suppressed compared to the half wave rectifier circuit.



By using four diodes as shown below, the reverse withstand voltage of each diode can be reduced to half of the above.

＜Three-phase full-wave rectifier circuit＞

The following is a circuit that rectifies three-phase alternating current to direct current.

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