Many devices in the house a person has the opportunitytune. This process is carried out with the help of a special regulator. To date, a tri-component subtype has been singled out in a separate category, but many people know little about this element. In fact, the feature of this part is a two-way action. Perhaps this is due to the anode, as well as the cathode. As a result of their movement in the device, the direction of the current changes.

Some believe that triacs canbe replaced by contactors, relays and starters. However, this opinion is erroneous. First of all, it should be noted the durability of these regulators. By the frequency of commutation, they are practical not limited and this is good news. At the same time, wear of parts is minimal. In addition, it should be noted the complete absence of sparking in devices of this type. In the moments of the zero line current, the switching regulators are capable of performing. Due to this interference in the circuit is significantly reduced.

Simple regulator scheme

The power regulator circuit for triac includesa single chip, and a set of thyristors. They can be located in a circuit after the capacitor or immediately at the board. Variable resistor, as a rule, there is one in the device. He is responsible for the interference in the controller. Voltage resistor is able to withstand the most diverse. In this case, much depends on the liberty of the device. Resistor, which is located behind the capacitor, the ultimate resistance is required to withstand at 3 ohms. In turn, the output element is set slightly weaker. Also, the Triac power regulator circuit incorporates a fuse.

Regulators on triac "KU208g"

This triac is different in that it is capable ofwork with commutated alternating current. At the same time, the voltage in the system is maintained to 5 A. The power controller on the triac "KU208g", as a rule, is compact and can be used in various equipment. As an example, you can bring a soldering iron.

Power regulators for soldering iron

Regulator power soldering iron on triac inthe chip does not need. There are two transistors in the standard circuit. They are established in some cases of a bipolar type. The first of them should be located directly near the power source. At this time, the second bipolar transistor is located behind the triac.

A distinctive feature of such regulatorsit is considered to be the presence of weak-power stabilitrons. Most often, these elements on the market can be found with the marking "KD2". This indicates that the zener diode has a maximum voltage of 2 V. In turn, the alternating current in the system can be a maximum of 5 A. The capacitor in the circuit is always set to only one. Solder it in some cases immediately after the bipolar transistor.

This item in the device is responsible forconversion of current. Resistors power regulator on triac has a different type. Analog elements at the input impedance maximum withstand 2 ohms. In turn, for zener diode resistors are installed in a variable type with increased frequency. They are able to work in both directions.

Model diagrams for vacuum cleaners

The power controller on the triac of the vacuum cleaner consists offrom a set of diodes, as well as resistors with a single capacitor. For good conductivity, the triac is in some cases provided with a ribbed heat sink. This additionally helps in stabilizing the voltage. Condensers in the system cope with impulses. Transistors mainly use silicon.

They can only pass through themselvesD.C. Resistance at the output in the system should not exceed 4 ohms. Otherwise, a large voltage is applied to the triac. Much in this situation also depends on the current transfer coefficient. It is affected by the collector together with the emitter installed.

The difference between phase regulators

Microchips in such regulators are usedlow-frequency. This is necessary for a fast conversion process. Zener diodes are used quite rarely. The phase change in the system occurs due to switching the capacitor to the upper position. To stabilize the voltage, the phase regulator of power on the triac has two thyristors, and they work in a pairwise circuit. Due to the high frequency at the cathode, the diodes are soldered very rarely.

The scheme of a noiseless controller

A simple fussless power regulator ontriac, as a rule, is used on devices with a voltage of more than 200 V. In this case, the chips are used two-channel. The system of diodes is installed next to the capacitors. Variable transistors in the circuit are not used. The maximum resistance of the capacitor is required to withstand up to 3 ohms. Directly, the power of the device is controlled by a receiver.

The pulse duty ratio atthis changes. Condensers in the system pass only a direct current through themselves. The frequency of the clock transistor depends on the division factor of the counter. Microcontrollers in the system are used to suppress interference. The pulse frequency at the input depends exclusively on the limit register.

Regulators with triac "TS80"

A simple power regulator on a triac "TS80"It boasts good thermal conductivity. The process of transformation is carried out directly in the transformer. The limiting frequency in this case depends only on the voltage in the network. In general, regulators with triacs of this type are more reliable, and they can work for a long time. However, they also have shortcomings.

First of all, it should be noted a small levelstabilization. This is due to the large load that is on the thyristor. To cope with the stability of the current, in some cases apply special filters. However, for household equipment this does not help. Thus, it is best to use regulators of this type on receivers and other low-frequency devices.

Models with triacs "TS 125"

Power controller on triac "TS 125"Used for powerful power supplies. It can withstand a maximum of 4 Ohm. In this case, the conductivity of the heat is at a high level. In addition, it should be noted that triacs of this type are equipped with indicators. These devices are designed to combat electromagnetic interference.

In some cases, the display systemis set to active. This involves using a low-frequency controller. This element in the system works in pairs with delimiters. They pass only an alternating current through themselves. In the case of negative polarity, condensers are switched on. To switch to the mains voltage there are a number of transistors.

Remote control devices

Remote power control on triac inThe controller must be equipped with a mandatory order. Diodes in the system are installed only analog type. The chip for normal operation of capacitors requires three channels. Resistors, as a rule, only need three. One of them is needed for transmission and stabilization of the signal from the transformer. The remaining two resistors are installed opposite the capacitors. In this case, the amplitude of the interference is significantly reduced and this should be taken into account.

Additionally, the regulators haveconverters. Nominal load these elements can withstand at 5 A. Variable resistors in the circuit are used quite rarely. This is due to the fact that power sources are high-voltage. Filtration systems are installed exclusively in front of the transformer. In this case, the accuracy factor will be maximum.

Regulators with soft start

For a soft start in the power regulatortriac insert a special block. Its main task is double integration. This occurs by the definition of the limiting value of polarity. The display system in the regulators is quite rare. Such devices can be used at temperatures from -20 to +30 degrees. The power supply of the system can be a unit up to 10 V. The sensitivity of the device depends solely on the types of resistors. If you use analog elements in the system, the current conversion is much faster.

The common-mode voltage of the regulator is capable ofis maintained at 5 V. The capacitors in the device are installed with a limiting resistance of 6 ohms. In this case, their capacity should be at least 2 pF. All this will significantly stabilize the output voltage. Diodes in the regulator are soldered to low power. The maximum load they must be able to withstand at the level of 5 A.

Plans for regulators for hot plates

For appliances such as hot plates, resistorsrequire current-limiting. Zener in the system uses only one. Transistors in the device can be up to three units. In this case, much depends on the type of power supply. If the limiting voltage is less than 30 V, only one transistor is required at the beginning of the circuit. Resistance it should be able to withstand at 5 ohms. A triac in the system is installed between two capacitors. The current is fed to the primary winding only after it passes through the transformer.