Inverter power supply, also known as inverter, is a type of DCIAC converter that converts the DC power of the battery pack into an AC power supply with stable output voltage and frequency. It generally refers to a device that converts low-voltage direct current into high-voltage (or low-voltage) alternating current. It can use a battery as a power source to output alternating current. Specifically, for example, a 12V battery cannot supply power to ordinary lamps, computers, televisions, etc., but by converting the battery into ordinary 220V AC power through an inverter and connecting it to these appliances, they can work normally.

       Generally, inverters come with built-in batteries, and UPS power supplies sold in computer stores are like this. However, the batteries they come with are relatively small and can only provide power to the computer for a few minutes to a dozen minutes. The main purpose is to continue supplying power to the computer in case of sudden power outages, so that you have time to save unsaved files and have time to shut down normally.

       Purpose:

       It is used in environments without AC power to provide power for AC devices. Its output power ranges from tens of watts to hundreds of kilowatts; The input DC voltage ranges from a few volts to several hundred volts.

       It is mainly used in the following places:

       1. Provide power to AC electrical appliances together with the DC power supply on vehicles such as cars, ships, and airplanes;

       2. Provide AC power to users in areas without power sources, together with other power generation equipment (solar, wind, hydro, and various fuel generators);

       3. As an uninterruptible power supply (UPS) for communication and power systems;

       4. As an emergency power supply (EPS) for firefighting purposes;

       5. Utilize portable power sources to provide temporary AC power, etc.

       Inverter, also known as inverter 

       Inverter is a DC to AC transformer, which is actually a voltage inversion process with the converter.

       Principle:

       The converter converts the AC voltage of the power grid into a stable 12V DC output, while the inverter converts the 12V DC voltage output by the adapter into high-frequency high-voltage AC power; Both parts also use the widely used pulse width modulation (PWM) technology. The core part is a PWM integrated controller, with UC3842 used as the adapter and TL5001 chip used as the inverter. The working voltage range of TL5001 is 3.6~40V, and it is equipped with an error amplifier, a regulator, an oscillator, a PWM generator with dead zone control, a low-voltage protection circuit, and a short-circuit protection circuit.

       Input interface section:There are three signals in the input section: 12V DC input VIN, working enable voltage ENB, and Panel | current control signal DIM. VIN is provided by the Adapter, and ENB voltage is provided by the MCU on the motherboard, with a value of 0 or 3V. When ENB=0, the inverter does not work, while when ENB=3V, the inverter is in normal working condition; The DIM voltage is provided by the motherboard and ranges from 0 to 5V. Different DIM values are fed back to the feedback terminal of the PWM controller, and the current provided by the inverter to the load will also decrease. The smaller the DIM value, the larger the current output by the inverter.

       Voltage starting circuit: When ENB is at high level, output high voltage to light up the backlight tubes of the Panel.

       PWM controller:It consists of the following functions: internal reference voltage, error amplifier, oscillator and PWM, overvoltage protection, undervoltage protection, short circuit protection, and output transistor.

       DC conversion:A voltage conversion circuit is composed of MOS switching transistors and energy storage inductors. The input pulse is amplified by a push-pull amplifier to drive the MOS transistor to perform switching actions, so that the DC voltage charges and discharges the inductor, and the other end of the inductor can obtain AC voltage.

       LC oscillation and output circuit:Ensure the required voltage of 1600V for lamp start-up and reduce the voltage to 800V after lamp start-up.

       Output voltage feedback:When the load is working, the feedback sampling voltage plays a role in stabilizing the inverter voltage output.

       application area

       The 220V power obtained by the inverter on the car is 220V 50HZ. The high-end ones are sine waves, while the cheaper ones are usually square waves. The type of sine wave is the same as the electricity used for connecting to a socket, while the type of square wave can also be used. However, if a fan or other equipment with a motor is used, there may be some noise. The reason for using square wave is because this modulation method is relatively low-cost. Generally, the maximum power of the inverter in the car is only 500 watts, and the air conditioner is usually over 700 watts. And, do you really want to install a household air conditioner on the car? The air conditioning in cars, including those in large buses, is driven directly by the engine to drive the compressor, not by electricity. If there are multiple electrical conversion processes in between, the losses will be even greater. And it's not easy to install, it's better to use car air conditioning.

       2. It is not a problem to connect things such as laptops, televisions, disc drives, etc. as long as they are used at their rated power. However, it should be noted that they are connected to the car battery. Although they are usually 11V and automatically protect the power supply to avoid low voltage causing the car to fail to start, they are still not suitable for use when the engine is not running. Therefore, if the load is relatively large, it is still recommended to start the engine. If it's a charging dock for a phone, there's no problem.

       On an electric vehicle, there is a module called DC-DC, also known as a DC converter. This module inputs 48V and outputs 12V, so you only need to purchase a 12V input car inverter to use it. Of course, it would be better if you could buy an inverter with a 48V input, but it is probably difficult to buy. Moreover, this module can only provide 5A current, at most 10A, and also needs to be used for car lights, so it is easy to overload. It is recommended to buy an additional DC converter if possible. This converter is specifically designed to power your inverter. If the DC converter can only provide 5A, then the input of the inverter should be less than 5A, otherwise it may damage the module. Of course, some DC converters have high currents. If the repair site does not have them, you can go to some electrical stores or ask them to repair them to provide you with a high current, or multiple DC converters can be connected in parallel. In short, do not let them overload.

       4. There is a VF traction inverter on urban rail vehicles, which is used for variable frequency and voltage conversion. During train traction, it converts high voltage (usually DC750V or DC1500V) into three-phase electricity with adjustable frequency and voltage, which is supplied to the traction electric motor for use. During braking, it can convert the three-phase electrical energy generated by the inertia of the train driving the traction motor to rotate into DC electricity and feed it back to the grid or consume it through an energy consumption module.

       The main applications of inverters in the field of communication are:

       Provide AC auxiliary power for DC power supply.

       Some maintenance tools require AC power, DC power cannot provide AC power, and inverters can be used to provide it.

       Provide DC-AC conversion function for photovoltaic grid connected power systems.

       Invert the direct current generated by the solar energy system into alternating current and input it into the power grid.

       Summary: There is no superior, as long as we analyze the specific situation for different fields, hoping to be helpful to netizens.