12v To 220v Inverter 180w By 2n3055

This circuit is designed to convert 12V DC from lead-acid batteries to 250V AC, suitable for use in cars, boats, or mobile homes. It provides sufficient power for small electronics such as lamps or soldering irons. The circuit comprises six transistors, a transformer, and a few additional electronic components, making it easy and inexpensive to build. The transistors Q3 and Q4 (both BC549) function as a stable multivibrator (AMV), generating a square wave output at approximately 50 Hz. They alternately control the inductor current. When Q3 conducts, current flows through Q2, activating Q1, which connects half of the primary coil of the transformer to the 12V battery voltage. If RCA 40411 transistors are used in the output section, the current through the primary coil can reach 10 amperes, resulting in a power output of 180 watts. Alternatively, using 2N3055 transistors will yield a power output of 90 watts. Since the transistors operate in saturation, they require substantial heat sinks, with cooling fins larger than 100mm and multiple fins being necessary. Utilizing a toroidal transformer can reduce the overall size of the circuit. The circuit is compact due to the minimal number of components and does not adjust to produce a sine wave output. Consequently, the output waveform is a square wave, which may cause issues with certain electrical devices, such as dimmer lights and electric motors, which are designed to operate with sine wave power. It is not recommended for use with color televisions or audio/video tape devices.

This circuit functions as a DC to AC inverter, specifically targeting applications where portable power is required. The design leverages a multivibrator configuration using transistors to create a square wave signal, which is then transformed to a higher voltage using a transformer. The choice of transistors is crucial for efficient operation; the BC549 transistors serve as the switching elements in the multivibrator, allowing for the generation of the necessary pulse signals that drive the transformer.

The transformer plays a pivotal role in stepping up the voltage from 12V to 250V AC. The configuration of the primary and secondary windings is designed to handle the power levels specified, ensuring that the circuit can deliver the required output without excessive losses. The output power ratings of 180 watts for RCA 40411 transistors and 90 watts for 2N3055 transistors highlight the importance of selecting the appropriate components based on the intended application.

Thermal management is a critical consideration in this circuit design. The use of heat sinks is essential to dissipate the heat generated by the transistors during operation, particularly when they are driven into saturation. The specified dimensions for the heat sinks ensure that the transistors remain within safe operating temperatures, thereby enhancing reliability and longevity.

The square wave output, while sufficient for basic applications, may not be compatible with all devices. Many electronic appliances, particularly those that rely on a sine wave input, may experience performance issues or may not operate at all. This limitation should be taken into account when designing systems that will utilize this inverter circuit, particularly for sensitive electronics such as audio equipment or color televisions.This circuit is converter to use to charge DC12V from the lead-acid batteries to AC 250V for use in a car, Boats or mobile homes. There are the output power There are the sufficient power to the small electronics such as a lamp or electrical soldering iron.

In circuit use only six transistors, transformer and a few electronic parts. So it is easy to build and cheap, too. The Q3(BC549) and Q4(BC549) both are the a stable multivibrator (AMV) has output is pulse square wave from about 50 Hz. They will alternately inductor current. When Q3 induct current will have the current flows through Q2, making Q1 connects the half coil circuit of the primary transformer with the 12V drop across voltage from battery.

If you use the transistor in the output section to be number: RCA 40411 will be has the current flows through the primary coil in each time is 10 amperes. To power output (Way secondary coil) is 180 watt. However, if the number 2N3055 power output will be have a 90 watt. Because transistors being used in saturation. Therefore, it must be held on a large heat sink. there is the cooling fins that size over than 100mm up and also multiple fins. And If using transformer is triodes core, it makes a smaller size. The circuit is small, because have a little device makes do no adjust to a sine wave. Thus the wave output will be a square. Which may be a result of some electrical appliances, such as, dimmer lights and electric motors, may be will not work.

Because it is designed to be used with a sine wave power, and is not recommended for use with color TV and video or audio tape. 🔗 External reference