The power converter is also called an AC converter. The power converter is a type of transformer. Due to the different power environments of countries and regions in the world, the voltage application range of electrical appliances in different countries is also different. Common power converters have 220V voltage and 110V voltage, so they need to be converted by power converters.
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The power converter is mainly used to convert one form of the socket into another form or multiple forms of sockets, and mobile phone charging, electric vehicles, etc. are also a type of power converter. It is mainly used to supply power to another electrical appliance. In order to make it more convenient and safer to use electricity.
The inside of the voltage converter is also composed of a toroidal power transformer. Because it is mainly set for import and export electrical appliances, the voltage converter is a self-coupling transformer. Under the premise of achieving the work efficiency goal, the weight and volume of the product are also obtained. Further, reduce.
The power transformer is an isolation transformer, and there are also self-coupling transformers, which are mainly used in products in various fields such as various machinery, lamps, and electric doors. Different parameters can be customized according to different fields.
The conversion of alternating current to direct current is called rectification, and the conversion of direct current to alternating current is called inversion. Inversion is much more complicated than rectification.
The equipment used to convert DC power to AC power is called "inverter". The principle is basically to send DC power to the transistor used for inverter output and use the transformer and other components connected to the tube loop to form positive feedback to the tube(automatic voltage stabilizer for ac). The tube produces "oscillating" current (starting up) and becomes AC output. If a more "strict" current output waveform is required, relevant electronic components must be connected to form a circuit that shapes the output waveform.
There are two commonly used methods, one is to first modulate the sine wave waveform through SPWM mode (if the square wave is also possible, this step can be omitted), and then switch the output voltage polarity through an H bridge, which requires H bridge The switching is synchronized with the SPWM circuit, which is technically complex, but the efficiency of this method seems to be very high, so many inverters use this method.
There is also a relatively simple circuit, which consists of a transformer with multiple windings and a small number of transistors forming a self-oscillating half-bridge inverter circuit. This method has relatively low efficiency and is generally only used for low-power applications.