2020-10-13
Inverter whose inverter is designed to convert the direct current (battery and storage battery) into alternating current (usually 220v50HZ sinusoidal or square wave). Emergency power supply, generally dc battery inverter into 220V AC.
Simply put, an inverter is an electronic device that converts low-voltage (12 or 24 or 48 volts) direct current to 220 volts alternating current. The name comes from the fact that inverters, which normally convert 220 volts of alternating current into direct current, do the opposite. We are in a "mobile" era, mobile office, mobile communication, mobile leisure and entertainment. In the mobile state, people need not only low-voltage direct current supplied by batteries or batteries, but also 220v ac, which is indispensable in our daily environment. Inverters can meet our needs.
A converter is an electrical device that changes the voltage, frequency, phase number and other quantities or characteristics of a power supply system. They include rectifier (AC - dc), inverter (DC - AC), AC converter and DC converter. In addition to the main circuit (i.e., rectifier circuit, inverter circuit, AC converter circuit and DC converter circuit), the converter also needs a trigger circuit to control the on-off of the power switch element and a control circuit to realize the regulation and control of the electric energy. The trigger circuit of the converter consists of two parts: pulse generator and pulse output. The former generates pulses of a certain frequency, a certain width or a certain phase according to the requirements of the control signal; The latter amplifies the level of this pulse to the drive signal suitable for the power switching elements in the converter. According to the control function, trigger circuit can be divided into phase-controlled trigger circuit (used for controllable rectifier, AC voltage regulator, direct frequency reducer and active inverter), cut control trigger circuit and frequency control trigger circuit. Using sine wave frequency control circuit can not only control the output voltage of inverter, but also improve the quality of output voltage. The converter control circuit divides the loop control circuit and the closed loop control circuit according to the control mode. The former is mainly used in some special equipment with low requirements; The latter has the function of automatic control and regulation and is widely used in all kinds of working machines. According to the nature of the control signal, the analog control circuit and digital control circuit are divided. Dc voltage and current are the most commonly used analog signals, which are easy to be processed and transformed by means of electricity. Digital signal is a set of information parameters with discrete values of the discontinuous change of the signal. Digital control has high precision, but the circuit is complex and expensive. Therefore, digital analog hybrid control circuit is widely used in practice. In addition, the microcomputer control circuit also has many advantages.