Rectifier – Explanation, Working, Types, Applications

25 Oct.,2022

 

Rectifier Module

Rectifiers are mainly classified into two types as:

Uncontrolled Rectifiers

The type of rectifier whose voltage cannot be controlled is known as an uncontrolled rectifier. Uncontrolled rectifiers are further divided as follows:

  • Half Wave Rectifier
  • Full Wave Rectifier

The type of rectifier that converts only the half cycle of the alternating current into the direct current is known as a half-wave rectifier. Likewise, a full-wave rectifier converts both positive and negative half cycles of the AC. An example of this is a bridge rectifier. A bridge rectifier uses 4 diodes that are connected in the form of a Wheatstone bridge.

Controlled Rectifiers

A type of rectifier whose voltage can be varied is known as the controlled rectifier. We use SCRs, MOSFETs and IGBTs to make an uncontrolled rectifier a controlled one. These rectifiers are preferred over their uncontrolled counterparts. There are two types of controlled rectifiers, and they are Half Wave Controlled Rectifier and Full Wave Controlled Rectifier. Half-wave controlled rectifier has the same design as the half-wave uncontrolled rectifier except we replace the diode with an SCR.
Related Links

  • Full Wave Rectifier
  • Half Wave Rectifier

What Are Some Applications of Rectifiers?

Some common applications of rectifiers are:

  • Rectifiers are used in electric welding to provide polarized voltage
  • Half-wave rectifiers are used as a mosquito repellent
  • Half-wave rectifiers are used as a signal peak detector in AM radio
  • Rectifiers are used in modulation, demodulation and voltage multipliers

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Frequently Asked Questions – FAQs

What is a rectifier?

A rectifier is an electronic device that converts an alternating current into a direct current by using one or more P-N junction diodes.

What are the types of rectifiers?

  • Uncontrolled Rectifier
  • Controlled Rectifier

The following are the types of rectifiers:

What is a half-wave rectifier?

The type of rectifier that converts only the half cycle of the alternating current into the direct current is known as a half-wave rectifier.

State true or false: Half-wave rectifiers are used as a mosquito repellent.

True.

List three applications of rectifiers.

  • Rectifiers are used in modulation, demodulation and voltage multipliers.
  • Half-wave rectifiers are used as a signal peak detector in AM radio.
  • Rectifiers are used in electric welding to provide polarized voltage.
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