Voltage inverter 12/220 volts 100 watts. Scheme, description

Free technical library

ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
Free library / Schemes of radio-electronic and electrical devices

Voltage inverter 12/220 volts 100 watts. Encyclopedia of radio electronics and electrical engineering

Free technical library

Encyclopedia of radio electronics and electrical engineering / Voltage converters, rectifiers, inverters

Comments on the article

The circuit of the DC voltage converter 12 V to AC 220 V is shown in fig. 1. This inverter is suitable for powering consumers who need AC 220V with a total power of up to 100W.

Rice. 1. Schematic diagram of the inverter (click to enlarge)

The inverter consists of a master oscillator (symmetrical multivibrator on VT1, VT2) and a power circuit (VT3...VT8). The inverter works as follows. After turning on the constant supply voltage, the master oscillator on VT1 and VT2 starts to generate control pulses. These pulses are fed through R5 and C3 to one arm of the power circuit, and through R6 and C4 to the second.

When the VT1 collector is high (logical "1"), and the VT2 collector is low ("0"), the transistors VT4, VT6 and VT8 are open, and the current flows through the circuit: "+" power supply - winding W1 " - collector-emitter junction of transistor VT8 - "-" power source At this moment, transistors VT3, VT5 and VT7 are closed.

The next moment, the VT2 collector will be "1", and the VT1 collector will be "0". Transistors VT3, VT5, VT7 are open, and the current will flow through the circuit: "+" power supply - winding W1' - collector-emitter junction VT7 - "-" power supply. Transistors VT4, VT6 and VT8 are closed. Due to this, an alternating voltage of a rectangular shape is applied to the primary winding of the output transformer, the amplitude of which is approximately equal to the supply voltage. The magnetic field created in the magnetic circuit induces an electromotive force in the secondary winding, the magnitude of which is determined by the number of turns of the secondary winding W2. Diodes VD1 and VD2 serve to prevent negative amplitude voltage surges during the operation of the master oscillator, and diodes VD3 and VD4 protect powerful transistors in the power circuit at idle (in the absence of load in the secondary winding of the transformer) from breakdown.

The TV transformer is wound on a Sh36x36 magnetic circuit. The windings W1' and W1 "have 28 turns of PEL wire d2,1 mm (each), and the winding W2 has 600 turns of PEL wire d0,59 mm. First, winding W2 is wound, and windings W1 'and W2" are wound on top of it. To achieve good symmetry, it is desirable to wind these windings simultaneously, in two wires.

On fig. 2a and b shows the printed circuit board and the layout of the elements on it. Transistors VT5, VT7 and VT6, VT8 are installed two by two on separate radiators without insulating gaskets.

Voltage inverter 12/220 volts 100 watts
Rice. 2a. Printed circuit board

Voltage inverter 12/220 volts 100 watts
Rice. 2.b. Layout of elements

To control the operation of the circuit, it is desirable to connect an ammeter with a measurement limit of 1 A between the positive power pole and the midpoint of the winding W10 (shown in the diagram in Fig. 1). It is designed to visually monitor the amount of current flowing through the transistors of the power circuit. When the maximum load is turned on in the secondary winding, this current should not exceed 10 A. When there is no load, it should be less than 5 A. If, when the inverter is turned on in the absence of load, the current exceeds 10 A, this means that some either from diodes VD3, VD4 or power circuit transistors. Setting up the inverter consists in setting up the master oscillator and is carried out using an oscilloscope or a frequency meter. The input of the oscilloscope (frequency meter) is connected to the collector of one of the transistors VT1 or VT2, and power is supplied to the generator. With RP, the oscillator frequency is set to 50 Hz. It is desirable to control the shape of rectangular pulses with an oscilloscope. The tuned inverter is mounted in a suitable housing, on the front panel of which an ammeter, fuse holder, master generator switch, load and battery power connection terminals, as well as battery (red) and master generator (green) indicators are displayed. The inverter can supply the consumer with a power of 100 W for at least 2 hours when using a battery with a capacity of 44 Ah.

Literature

Radio, Television, Electronics, 6/98. Translation by A. Belsky

Publication: cxem.net

See other articles Section Voltage converters, rectifiers, inverters.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Machine for thinning flowers in gardens 02.05.2024

In modern agriculture, technological progress is developing aimed at increasing the efficiency of plant care processes. The innovative Florix flower thinning machine was presented in Italy, designed to optimize the harvesting stage. This tool is equipped with mobile arms, allowing it to be easily adapted to the needs of the garden. The operator can adjust the speed of the thin wires by controlling them from the tractor cab using a joystick. This approach significantly increases the efficiency of the flower thinning process, providing the possibility of individual adjustment to the specific conditions of the garden, as well as the variety and type of fruit grown in it. After testing the Florix machine for two years on various types of fruit, the results were very encouraging. Farmers such as Filiberto Montanari, who has used a Florix machine for several years, have reported a significant reduction in the time and labor required to thin flowers. ... >>

Advanced Infrared Microscope 02.05.2024

Microscopes play an important role in scientific research, allowing scientists to delve into structures and processes invisible to the eye. However, various microscopy methods have their limitations, and among them was the limitation of resolution when using the infrared range. But the latest achievements of Japanese researchers from the University of Tokyo open up new prospects for studying the microworld. Scientists from the University of Tokyo have unveiled a new microscope that will revolutionize the capabilities of infrared microscopy. This advanced instrument allows you to see the internal structures of living bacteria with amazing clarity on the nanometer scale. Typically, mid-infrared microscopes are limited by low resolution, but the latest development from Japanese researchers overcomes these limitations. According to scientists, the developed microscope allows creating images with a resolution of up to 120 nanometers, which is 30 times higher than the resolution of traditional microscopes. ... >>

Air trap for insects 01.05.2024

Agriculture is one of the key sectors of the economy, and pest control is an integral part of this process. A team of scientists from the Indian Council of Agricultural Research-Central Potato Research Institute (ICAR-CPRI), Shimla, has come up with an innovative solution to this problem - a wind-powered insect air trap. This device addresses the shortcomings of traditional pest control methods by providing real-time insect population data. The trap is powered entirely by wind energy, making it an environmentally friendly solution that requires no power. Its unique design allows monitoring of both harmful and beneficial insects, providing a complete overview of the population in any agricultural area. “By assessing target pests at the right time, we can take necessary measures to control both pests and diseases,” says Kapil ... >>

Random news from the Archive

Silicon Carbide Mass Production Plant 05.11.2013

The German company PVA TePla demonstrated equipment for the production of silicon carbide boules - single crystals, from which wafers are cut for semiconductor production.

Silicon carbide (SiC) is used to make high-power and high-voltage semiconductor components, and LEDs for lighting systems are grown on silicon carbide substrates.

The machine, named baSiC-T, uses a physical steam transfer system and can produce boules for 100mm and 150mm wafers. The initial steam for growing the crystal is obtained by sublimation of the powder at a temperature of 2200°C, created by an induction heater with a power of 10 kW. The maximum total power is 60 kW. The installation has overall dimensions of 2x1,2x2,8 m and weighs 1300 kg (2000 kg with the control cabinet).

"Its modular design," says the company, "takes up less space than multiple mass-produced systems connected together."

Other interesting news:

▪ Impossible black hole discovered

▪ Some genes wake up after death

▪ Older trees are more drought tolerant

▪ MD Elite A-series Richland processors

▪ Mystery of human brain evolution solved

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site Civil radio communications. Article selection

▪ article by Jay Glen Miner. Famous aphorisms

▪ article Should I add hogweed to borscht? Detailed answer

▪ article Bucking whips on a semi-automatic installation. Standard instruction on labor protection

▪ GIR article with LED indicator. Encyclopedia of radio electronics and electrical engineering

▪ article Block for satellite reception - ANTENNAS. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

Comments on the article:

locksmith
although the circuit works, but it’s painfully unreliable, the cartoon works with an overlap of half-waves, as a result, the output transistors heat up and fly like seeds, it’s better to do it on logic. (he collected about eight years ago) [down]

All languages of this page

Home page | Library | Articles | Website map | Site Reviews