Kaluga region.

Power Controllers

Each house has appliances powered by AC mains. Extend the power and ease of use of many of these devices, you can by controlling the power consumed by them. One of the most common principles of power control in AC is a phase. In a phase control method is used the dependence between the time (phase) of the opening of the regulatory element with respect to the half-supply voltage and power consumption of the device. For power control uses a key element, as is most convenient to use a triac. By varying the delay (phase) of the discovery of the triac with respect to the half-wave of the mains supply can be adjusted to the load capacity almost from 0 ~ 100%. Dependence of the voltage on the load of the opening phase triac is shown in Fig. 1. MASTER KIT offers a number of kits to build power regulators. The work of all the controllers is based on the principle of phase control. They differ in the maximum allowable power of the connected load. The controller, based on a set of NF245 can connect the AC load up to 500 W, the regulator on the basis of NF246 power up to 1000 watts, based on NF247 2500 Tues Collected regulators will control the power of electric heating and lighting (including heating temperature of electric soldering irons), to regulate the speed of asynchronous AC motors (fan, elektronazhdaka, electric drills, etc.). With a wide range of adjustment and high power regulators will find broad applications in the home.

Figure 1. Regulated voltage dependence of the opening phase triac

Power controller 500 Vt/220 In NF245 set allows you to build power regulator 500 Vt/220 B. Unit Overview presented in Figure 2, Circuit diagram in Figure 3.

Figure 2. Product Overview NF245

Figure 3. Circuit diagram of NF245

Job Description Triac power regulator uses the principle of phase control. The principle of operation of the controller is based on the change in the moment when the triac on the transition line voltage crosses zero (the start of the positive or negative half-wave voltage). At the beginning of the positive half-cycle of the triac is closed. As you increase the supply voltage (Figure 1), the capacitor C1 is charged through a divider R1, VR1. Increasing the voltage across the capacitor C1 lags (phase-shifted) from the network by an amount depending on the total resistance of the resistors R1, VR1 and capacitance C1. Capacitor charge lasts as long as the voltage across it reaches the threshold of "breakdown" dynistor (about 32). Once dynistor open (hence open and triac), a current flows through the load, determine the total resistance of the open triac and load. Triac remains open until the end of halftime. Resistor voltage VR1 is set to open dynistor and triac. Ie This resistor is power control. During the negative half-wave of the principle of the scheme is similar. The LED indicates the operating mode of the power controller.

Constructive set made on the printed circuit board of foil fiberglass with dimensions 38x27 mm. Circuit diagram of the device is shown in Figure 4. The design provides for the installation fee in the case, for this motherboard has mounting screw holes 3 mm. Table 1 provides a list of items used in the controller.

Table 1. List of elements set NF245 Position C1 R1 VR1 DIAC TRIAC D1 LED Nominal 0.1 uF 4K7 500 k DB3, dynistor BT136-600E, triac In 1N4148/16 yellow LED

Figure 4. Circuit diagram NF245 Power regulator for 1000 Vt/220 In NF246 set allows you to build power regulator on 1000 W. Vt/220 electrical circuit diagram of the controller is similar to NF245, differ only by the type of triac. The unit uses a more powerful triac. General view of the device, electrical and wiring diagram similar to those presented in Figure 2, Fig. 3 and Figure 4. Table 2 provides a list of elements of the device. Table 2. List of items in a set NF246 Position C1 R1 VR1 DIAC TRIAC D1 LED Nominal 0.1 uF 4K7 500 k DB3, dynistor BTA12-600 B, triac In 1N4148/16 orange LED

Power regulator for 2500 Vt/220 In Power regulator, assembled from a set of NF247 will handle a load of up to 2.5 kW at 220 V AC. Appearance of the device is shown in Figure 5, and the electrical circuit diagram - Figure 6. Diagram of the device is basically similar to the above schemes sets. Added a suppression circuit C2, R3. The switch SW can break the chain charging control C1, resulting in blocking of the triac and load loss. Otherwise, operation of the circuit diagram of the device is identical sets of NF245, NF246.

Figure 5. Product Overview NF247

Figure 6. Circuit diagram of NF247

Constructive set made on the printed circuit board of foil fiberglass with dimensions 85x69 mm. For more effective heat sink is provided for the triac. Circuit diagram of the device shown in Fig. 7. The design provides for the installation fee in the case, for this motherboard has mounting screw holes 3 mm. A variable resistor used to regulate power, can be installed on the device. The list of elements of the scheme is given in Table 3.

Table 3. List of items in a set NF247 Position C1 C2 R1 R2 R3 Nominal 0.1 uF 0.1 In mkF/630 4K7 2 MOhm 220 Ohm

VR1 DIAC TRIAC D1 LED

500 k DB3, dynistor BTA26-600B, triac In 1N4148/16 Green LED See Figure

Figure 7. Circuit diagram NF247

To reduce the noise created by the regulators can use a power strip, collected according to Fig. 8. Fuses F1, F2 - on current 3 A, the capacitors C1, C2 - with an operating voltage of 400 ... 630 V (radioelements filter kit sets are not included.) You can buy a box set of the line filter NK045 Surge."

Figure 8. Surge protector

Conclusion To save time and free you from the chore of finding the necessary components and manufacture of printed circuit boards, MASTER KIT offers a set of NF245, NF246, NF247 collect a power controllers for electrical heating and lighting, induction AC motors. The sets consist of the factory circuit board and all the necessary components. The complete set includes instructions for assembly, operation and eliminate possible errors. More information about the range of our products, you can use the directory "MASTER KIT2005" (Annex "New Year 2005") and on our website, which presents a lot of information on electronic kits and modules MASTER KIT and the addresses of shops where they you can buy. The site works MASTER KIT conference and electronic subscription to the newsletter, under "whales in the magazines" offered radio article, and a lot of interesting and useful information for amateurs and professionals. Our range is constantly growing and updated innovations, created using the latest achievements of modern electronics.

Sets, blocks and modules MASTER KIT, magazines "radiodelu" you can buy in stores radio parts of your city.