There are several reasons why a host needs to create a new voltage converter. Its main purpose is to provide the magnitude of the mains voltage of 220V in size from the initial value of 12 W.
Voltage stabilizer for home.
Inverters 12 220 V are made by many amateurs with their own hands, because high-quality converters are not cheap. Before you assemble the device, you need to study the materials explaining the mechanism of its use.
Scope of converters 12 220 V
In the process of battery operation, the battery charge level decreases. The converter stabilizes the voltage during the journey, in the absence of electricity.
12/220 volt converter using a standard transformer.
Inverter 12 220 V will allow the owner to improve the engineering structures in the house. The power of the device for converting the current is selected depending on the total value of the operated load. It takes into account the process of its consumption: reactive and active. Reactive load consumes not all received energy, therefore the total power exceeds its active value.
A pure sine wave inverter is used to connect tools with a total power of 3 kW. Considerable fuel economy is ensured by the use of a voltage converter and a mini-power station.
To the inverter connect such consumers as:
- alarm systems;
- heating boilers;
- pumping apparatus;
- computer systems.
The advantages of the device for voltage conversion
Circuit voltage boosting converter.
Inverters have gained respect for their work, because they have a number of undoubted advantages. The device works silently, does not litter the surrounding area with exhaust gases. The instrument maintenance is minimal: there is no need to check the pressure in the engine. The inverter has a slight mechanical wear, allows you to connect any consumers. Inverter 12 220 V operates at increased power on the КР121 ЕУ, has a high efficiency.
When assembling an inverter with a master device as a multivibrator, the advantages of the converter are expressed in the availability and simplicity of the device. The dimensions of the product are compact, the repair is not difficult, and operation is possible at low temperatures.Back to table of contents
Self-made converter 12 220 V and the general principle of its creation
The electrical circuit of the voltage converter 12-220 volts.
In the market of radio components, most of the inverters operate using high frequencies. Pulse inverters completely replaced the classic circuit with the use of transformers. Chip K561TM2 consists of two D-flip-flops, which contain two inputs R and S. It is created using CMOS technology, enclosed in a plastic case.
The master inverter generator is mounted on the basis of K561TM2, using the device DD1 for operation. For the frequency divider is mounted trigger DD1.2. Amplification cascade receives signals from the chip.
To work pick up transistors KT827. In their absence, they use transistors KT819 GM or field semiconductors - IRFZ44.
The sine wave generator for the 12 220V inverter operates at high frequency. For the formation of a circuit with dimensions of 50 Hz, the secondary winding and the parallel connection of a capacitor and a load are used. When connecting any device, the inverter creates a voltage conversion of 220 V.
The circuit has one major drawback - the imperfect form of the output parameters.
Chip K561TM2 duplicated K564TM2. Increasing the power of the converter is achieved by selecting more intense transistors. Attention should be paid to the capacitor installed at the outlet. It has a voltage of 250 V.Back to table of contents
Creating a converter using the latest details
Powered fluorescent lamps from 12 volts.
Self-made inverters operate stably, the output transistors operate on a reinforced main generator. They use elements of the KT819GM series mounted on a large radiator.
To create a converter, a simplified scheme is used. In the process of work acquire the necessary materials:
- chip KR121EU1;
- IRL2505 transistors;
- soldering iron;
The KR12116U1 microcircuit has a special feature: it contains two channels for adjusting the keys and easily copes with the construction of simple voltage converters. The microcircuit at a temperature of +25 ° C gives the limit values of voltage 3 and 9 V.
The frequency of the master oscillator is determined by the parameters of the elements in the circuit. IRL2505 transistors are set for use at the output. It receives a signal, the level of which allows you to adjust the output transistors.
Formed low level does not allow the transistors to move from a closed form to another state. As a result, the occurrence of instantaneous passage of current after simultaneous opening of keys is completely excluded. When a high level hits on pin 1, pulse generation is turned off. In the diagram, pin 1 is connected to the common wire.
A transformer T1 and two transistors: VT1 and VT2 are used for mounting the push-pull cascade. In the open channel, a resistance of 0.008 Ohm is observed. It is insignificant, so the power of transistors is small, even with the passage of a large current. The output transformer having a power of 100 W, allows you to use the current IRL2505 to 104 A, and the pulse is 360 A.
The main feature of the inverter is that you can use any transformer that has 2 windings per 12 V at the output.
At output power up to 200 watts, they refuse to install transistors on radiators.
It should be noted that electric current with a power of 400 W can reach 40 A.Back to table of contents
Inverter device for fluorescent lamps
The scheme of the resonant voltage converter.
To create a converter that can illuminate the house, garage, car, do-it-yourself assembly scheme. Pulse VOLTSL converter push-pull. It is mounted on the power supply TL 494 (КС 1114ЕУ4). The chip is controlled by the power part of the power supply and contains in its composition:
- voltage generator;
- voltage stabilization source;
- 2 transistors on the output current source, with a capacity of 0.7 mm and 0.1 V.
For installation acquire rectifying diodes and a transformer from the power supply. It is necessary to resolve the issue of transformer rewinding. In its implementation with their own hands to calculate up to 100 kHz. Acquire resistors, according to the scheme R1 and R2, creating the passage of current pulses at the output. The working frequency is formed by creating a chain C1 and R3. Mount diodes HR307, and in their absence HER304. Not bad work with diodes KD213. Select capacitors of various capacities. The soldered chip is placed in the panel. The circuit can work up to 4 hours - transistors do not overheat, and adjustment is not required.
The transformer is subject to self-winding. It is necessary to stock up in advance with a ring of ferrite with a diameter of 30 mm. The basis is the proportion of turns in a 1: 1: 20 winding, where 1: 1 is the primary winding, and 20 is 200 turns of the secondary coating.
First of all, wind the secondary winding using a wire with a cross section of 0.4 mm. The next stage is the creation of a primary coating consisting of two halves with 10 turns each. From a multicore soft wire with a diameter of 0.8 mm create a semi-winding. To convert a transformer, you can use the device for 12-volt lamps, illuminating the ceiling. The secondary winding is removed, and the half-winding is created by winding the cover of the widow with a folded wire. Then the junction is cut, and the ends of the wire are soldered together, forming the center of the half-winding.
For work use powerful metal conductors or field-effect transistors IRFL44N LRF46N. For the converter put diodes HER307 or KD213. Capacitors are taken from a computer power supply, having a diameter of up to 18 mm.
During prolonged operation, the transistors heat up, the radiator is not installed. When using it, do not wrap the flanges of the transistor housings through a resistor. Washers and gasket material should be used from the computer's power supply.
The inverter is reliably protected from overloads if a fuse and a diode are installed at the output. Observe the safety instructions for work: beware of high voltage. Capacitor charge lasts 24 hours. Discharge is carried out using a glowing lamp at 220 V.
Inverter do-it-yourself is made according to a fairly simple scheme, it is a convenient device for obtaining a voltage of 220 watts. All the devices that we do with our own hands, work no worse than the factory ones - this is the credo of the craftsmen who start making the converter.