Rectification (electricity) | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-06-29

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Rectifier


00:02:20 1 Rectifier devices
00:03:40 2 Rectifier circuits
00:04:13 2.1 Single-phase rectifiers
00:04:23 2.1.1 Half-wave rectification
00:06:10 2.1.2 Full-wave rectification
00:08:34 2.2 Three-phase rectifiers
00:09:34 2.2.1 Three-phase, half-wave circuit
00:13:21 2.2.2 Three-phase, full-wave circuit using center-tapped transformer
00:14:35 2.2.3 Three-phase bridge rectifier uncontrolled
00:24:46 2.2.4 Three-phase bridge rectifier controlled
00:30:17 2.2.5 Twelve-pulse bridge
00:31:20 2.3 Voltage-multiplying rectifiers
00:34:29 3 Quantification of rectifiers
00:35:06 3.1 Conversion ratio
00:44:16 3.2 Transformer utilization ratio
00:46:37 4 Rectifier voltage drop
00:48:25 5 Harmonic distortion
00:48:49 6 Rectifier output smoothing
00:50:10 6.1 Performance with low impedance source
00:51:22 6.2 Capacitor input filter
00:52:57 6.3 Choke input filter
00:54:18 6.4 Resistor as input filter
00:54:59 6.5 Higher order and cascade filters
00:56:37 6.6 Voltage regulators
00:58:48 7 Applications
01:01:40 8 Rectification technologies
01:01:51 8.1 Electromechanical
01:02:51 8.1.1 Synchronous rectifier
01:03:37 8.1.2 Vibrating rectifier
01:04:48 8.1.3 Motor-generator set
01:05:56 8.2 Electrolytic
01:08:16 8.3 Plasma type
01:08:39 8.3.1 Mercury-arc
01:10:28 8.3.2 Argon gas electron tube
01:12:10 8.4 Diode vacuum tube (valve)
01:14:34 8.5 Solid state
01:14:43 8.5.1 Crystal detector
01:15:45 8.5.2 Selenium and copper oxide rectifiers
01:17:15 8.5.3 Silicon and germanium diodes
01:17:50 8.5.4 High power: thyristors (SCRs) and newer silicon-based voltage sourced converters
01:19:23 8.5.5 Active rectifier
01:20:25 9 Current research
01:21:32 10 See also



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SUMMARY
=======
A rectifier is an electrical device that converts alternating current (AC), which periodically reverses direction, to direct current (DC), which flows in only one direction.
The process is known as rectification, since it "straightens" the direction of current. Physically, rectifiers take a number of forms, including vacuum tube diodes, mercury-arc valves, stacks of copper and selenium oxide plates, semiconductor diodes, silicon-controlled rectifiers and other silicon-based semiconductor switches. Historically, even synchronous electromechanical switches and motors have been used. Early radio receivers, called crystal radios, used a "cat's whisker" of fine wire pressing on a crystal of galena (lead sulfide) to serve as a point-contact rectifier or "crystal detector".
Rectifiers have many uses, but are often found serving as components of DC power supplies and high-voltage direct current power transmission systems. Rectification may serve in roles other than to generate direct current for use as a source of power. As noted, detectors of radio signals serve as rectifiers. In gas heating systems flame rectification is used to detect presence of a flame.
Depending on the type of alternating current supply and the arrangement of the rectifier circuit, the output voltage may require additional smoothing to produce a uniform steady voltage. Many applications of rectifiers, such as power supplies for radio, television and computer equipment, require a steady constant DC voltage (as would be produced by a battery).  In these applications the output of the rectifier is smoothed by an electronic filter, which may be a capacitor, choke, or set of capacitors, chokes and resistors, possibly followed by a voltage regulator to produce a steady voltage.
More complex circuitry that performs the opposite function, converting DC to AC, is called an inverter.