Rectifier circuit (or rectifier or rectifier diode) is an electrical device that converts alternating current (AC), which periodically reverses direction, into direct current (DC), which flows in only one direction.
This process is called rectification, because it “straightens” the direction of the current. Physically, rectifiers come in several forms, including vacuum tube diodes, mercury arc valves, stacks of copper and selenium oxide plates, semiconductor diodes, rectifier control silicon and other silicon-based semiconductor switches. Historically, even switches and synchronous electric motors have been used. Early radio receivers, known as crystal radios, used a “cat’s whisker” of thin wire pressed into a galena (lead sulfide) crystal phệ serve as a point-contact rectifier or “crystal detector”.
- 1 What is a rectifier circuit?
- 2 Half wave rectifier circuit
- 3 Full-wave rectification
- 4 Positive half cycle
- 5 Negative half cycle
- 6 Disadvantages of full-wave rectifier design
- 7 Other configuration
- 8 Full wave bridge rectifier (4 diodes bridge rectifier circuit)
- 9 Circuit diagram of full-wave bridge rectifier
- 10 Polyphase version using Alternate Layout
- 11 Ripple voltage
- 12 1-pulse, 2-pulse and 6-pulse unit
- 13 Rectifier circuit phases
- 14 Is it possible phệ get more pulses than twice the number of phases in a rectifier circuit?
- 15 Thông tin thêm
What is a rectifier circuit?
Now we come phệ the most common application of the diode: rectifier . Simply put, rectifier is the conversion of alternating current (AC) phệ direct current (DC). This involves a device that only allows direct current. As we have seen, this is exactly what a semiconductor diode does. Type rectifier circuit the simplest is the rectifier half wave . It only allows half of the AC waveform phệ pass through the load. (Picture below)
Half wave rectifier circuit.
Half wave rectifier circuit
For most source applications, half wave rectifier circuit (or rectifier circuit 2 half cycle) is not enough for the task. The harmonic content of the output waveform of the rectifier is very large and therefore difficult phệ filter. Furthermore, the AC power supply only powers half the load per full cycle, meaning half of its capacity is left unused. However, half-wave rectification is a very simple way phệ reduce power phệ a resistive load. Some two-position lamp dimmer switches apply full AC power phệ the filament for full brightness of stiffness and then half-wavelength modulation phệ produce a weaker light. (Picture below)