What are some ways to turn alternating current into direct current? Please elaborate

With a rectifier you can!

Rectifier principle.

In the two basic types of rectifiers, based on high-power diodes or thyristors, the high-voltage AC power of the grid is converted into DC power by a transformer. Other types of rectifiers for the future (near or far-fetched): Choppers based on cutting-edge products of uncontrollable diodes, chopper DC-DC converters or active rectifiers with current source inverters.

Obviously, this latest rectifier has a lot to do in terms of technology, but it shows advantages, such as its ability to load the grid with very little harmonic interference and a power factor of 1.

Diode Rectifier The simplest of all the rectifier categories is the diode rectifier. In its simplest form, diode rectifiers do not provide any means of controlling the output current and voltage values. In order to be suitable for industrial processes, the output value must be controllable within a certain range.

This control can be accomplished by applying a mechanical so-called on-load tap converter. As a typical case, an on-load tap converter controls the input AC voltage on the primary side of the rectifier transformer, so that the output DC value can be controlled within a certain range. Typically, an on-load tap converter is used in combination with a saturation reactor connected in series in the rectifier output circuit.

By introducing a DC current into the reactor, a variable impedance is created in the line. Therefore, by controlling the voltage drop across the reactor, the output value can be controlled within a relatively narrow range.

Thyristor Rectifier It is the thyristor rectifier that is very close to the diode rectifier in terms of design. Because the electrical parameters of thyristor rectifiers are controllable, there is no need for on-load tap converters and saturation reactors.

Because thyristor rectifiers do not contain moving parts, the maintenance of thyristor rectifier systems is reduced. One advantage noted is that thyristor rectifiers can be adjusted faster than diode rectifiers. During the step of the process characteristics, thyristor rectifiers are often adjusted quickly to avoid overcurrents.

As a result, thyristor systems can be designed to have a smaller overload capacity than diode systems.

Arranged by general energy conversion efficiency:

1.The AC motor is connected to the DC rotor generator, and the brushes and commutators are used in the generator to directly output DC.

2.After rectification, it becomes a one-way pulsating direct current (if the current direction is different, such as sinusoidal alternating current, this step can not be saved), and then through the filter circuit (here the ballast is used in series low-frequency choke (inductor) filtering, and parallel bypass capacitors can also be used, but for the sake of effect, diodes are generally used, and 4 diodes form a bridge called pi filtering. ）

3.Alternating current becomes chemical energy and then into direct current. (Such as batteries, but generally charged into DC before charging, otherwise it is difficult to charge in, and there is also great damage to the battery.) ）

4.Other. Such as local heating and temperature difference power generation, or lighting a lamp to connect to a photocell, but the efficiency...

How alternating current becomes direct current.

Direct current can be turned into alternating current through an inverter. An inverter typically consists of an inverter bridge, control logic, and filtering circuitry. The basic schematic diagram looks like this:

Inverter is the process of converting current in opposition to rectification, converting direct current into alternating current. When the inverter side, i.e., the AC measurement, is connected to the power grid, it is called an active inverter, and when the inverter side, i.e., the AC measurement, is directly connected to the load, it is called a passive inverter.

Use the inverter directly to convert direct current into alternating current at a frequency of 50 Hz, the voltage can be 220V for single phase, or 380V for three phases, and other voltage values can also be converted according to your needs.

There are three ways to convert direct current into alternating current: 1. Use DC power supply to drive the DC motor - mechanical transmission to the alternator to generate alternating current; This is one of the oldest methods, but it is still in use today, and is characterized by low cost and easy maintenance. It is still used in high-power conversion; 2. Use an oscillator (that is, the inverter on the current market; This is a relatively advanced method, with high cost, and is mostly used for low-power conversion; 3. The principle of mechanical oscillator converter is to make the DC current intermittent, and after passing through the transformer, it can output alternating current in the secondary stage of the transformer, which is a relatively old method, which has basically been eliminated.

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The rectifier is removed by using an inverter, that is, an inverter.

The basic principle of the inverter is to use two electronic switches (IGBTs) that are connected in series and then in parallel to both ends of the DC current, and the two switches are regularly divided and closed (and only one is closed at the same time) to produce a square wave signal with a DC duty cycle change. A second identical circuit is used to generate another DC square wave signal. The switching control of the second circuit is exactly the opposite of the first.

In this way, the square wave levels of the output of the two circuits are exactly opposite. The voltage between two points is the positive and negative alternating current square wave (PWM). This waveform is controlled according to a certain law, and the output of this waveform after passing through the low-pass filter is an AC sine wave.

If you're asking about making your own power supply, you can get alternating current as long as you have an LC oscillation circuit.

If you need to use a mature product to get 220 volts AC for you, you can buy an inverter, and if you have a motor circuit, you also need to use a sine wave inverter.

Inverter is used. There is the current equipment.

It is more difficult to change DC to AC, and it is necessary to use a more expensive inverter.

An inverter circuit is used, but it is rarely DC to AC.

The inverter can turn DC into AC.

Abbreviation of direct current: DC

Abbreviation for alternating current: AC

According to different voltages, currents, and meet the needs of power supply equipment, there is a process of conversion or transformation.

The English abbreviation of DC to AC: DC AC

There are many types of DC to AC equipment, and they are used in a wide range of applications. Including the mobile phones we use, there will be DC to AC work needs.

The original root of DC to AC is to generate a pulsating DC first, which requires a first-class circuit to realize.

It can also be said that with the oscillation circuit, it is the foundation to realize the DC to AC.

You need to use an inverter. It is to change the DC with a certain size and direction to the AC with a change in size and direction, which is mainly completed by the inverter bridge, and of course other circuits.

Alternating current is turned into direct current by reducing the voltage, AC to DC power converter circuit, obtaining a pure DC waveform, and adjusting the fixed DC voltage.

1. Reduce the voltage

Sometimes it is necessary to increase the voltage when supplying power over long distances. Similarly, for devices that use lower power, the voltage needs to be reduced. Step-up transformers are used to increase the voltage level, and step-down transformers are used to reduce the voltage level.

Consider a transformer with a 12V output, then the 230V AC power is converted to 12V AC through a step-down transformer. The RMS value and its peak value can be given by multiplying the square root of 2 with the RMS value, which is approximately equal to the output of the step-down transformer of 17V.

Therefore, the 17V AC power output from this buck must be converted to DC power and then stepped down to 5V DC. Here, the role of the AC-to-DC converter (i.e., the rectifier) is to convert 17V AC to DC.

2. AC to DC power converter circuit: cracking.

AC to DC conversion and burners convert AC power to DC power at the load-side connection. There are different types of rectifiers, such as half-wave, full-wave, and bridge rectifiers.

A full-bridge rectifier consisting of four diodes is connected in the form of a bridge. Differential shed diodes conduct electricity in only one direction, i.e., during forward bias. It remains closed in the other direction, i.e., during reverse bias.

In the above circuit, diodes D2 and D4 are turned on during a positive half-cycle. During the negative half cycle of the power supply, diodes D1 and D3 are turned on. Therefore, the AC input in this way is rectified into the output DC.

But the problem is that the DC output power consists of pulses, not pure DC.

3. Obtain pure DC waveform:

If required, convert pulsating DC to pure DC. For this purpose, most circuits use capacitors. When the input voltage increases from zero to peak, the capacitor is used to store energy.

When the input voltage drops from peak to zero, the energy of the capacitor can be released. Therefore, in this way, this process of charging and discharging of the capacitor can be used to convert pulsating DC to pure DC.

4. Adjust the fixed DC voltage

In order to stabilize the output voltage at a fixed desired value, a voltage regulator IC is finally used here. The name of the DC regulator IC is 78XX, and the last two digits of XX represent the output voltage value. For example, a 7805 regulator IC can be used to limit the output voltage to 5V, and a 7809 regulator IC can be used to limit the voltage to 9V.

Alternating current. Both the magnitude and direction change over time.

For alternating current. Alternator.

emitted, power generation process, multi-pair.

Magnetic pole. Evenly distributed at a fixed angle.

Circle. on, make the power generation process, each.

Coil. Cutting magnetic field lines, each produced due to having multiple pairs of poles.

Magnetic field lines. It is cut and produced. Voltage.

Current. All of them change according to the chord law, so they can be interrupted to produce a stable current alternating current.

Frequency. 50 Hz, i.e. 50 changes per second. When there is also its frequency.

Electronic circuits. Yes.

Square wave. , triangles, and so on.

Waveform. Alternating current.

Conductor. Cutting magnetic field lines are generated.

Capacitance. Charge and discharge

Switch. Transistor.

Generated at work.

The direction of direct current changes over time, and is usually divided.

Pulsating direct current.

And. Constant current.

Pulsating DC has an AC component color TV.

Power circuits. The voltage of about 300 volts or so, the pulsating DC component is removed by the capacitor, and the constant current is ideal, and the size and direction are changed.

with a rectifier. A rectifier is a rectifier device, which is simply a device that converts alternating current (AC) to direct current (DC).

It has two main functions: first, it converts alternating current (AC) into direct current (DC), which is filtered to supply the load or to the inverter; Second, the battery is charged at a voltage that is charged. Therefore, it also acts as a charger.

When the stator coil induces alternating current, it goes to the rectifier diode, and the positive electrode begins to flow through the upper diode, and the lower diode cannot pass. The voltage output then goes to the positive terminal of the battery, then back to the negative terminal, through the negative terminal of the generator back to the rectifier diode, and finally to the negative terminal of the stator coil. A loop is formed.