NTC thermistor chip for IGBT produced by EXSENSE Electronics Technology Co., Ltd., adopt advanced semiconductor manufacturing process, combined with independent intellectual property rights, to ensure high stability and high reliability of continuous production of NTC thermistor chip for IGBT, and to produce higher precision NTC thermistor chip for IGBT.

Functionally, IGBT is a circuit switch implemented by a transistor. When conducting, it can withstand a current of tens to hundreds of amperes; When it is turned off, it can withstand a voltage of hundreds to thousands of volts. IGBT as a kind of transistor, which is controlled by other circuits instead of mechanical buttons. The simplified model of IGBT has three interfaces, two (collector, emitter) connected to the strong current circuit, and one (gate) to receive control electrical signals. Give a high-level signal to the gate and the switch (between collector and emitter) opens; Give the gate a low-level signal and the switch off. The circuit that gives the control instruction to the gate is called the control circuit, which can be understood as a kind of "computer", but the actual "computer" is usually a single chip microcomputer or a microprocessor called the Digital Signal Processor (DSP). It is good at processing digital signals, even for some very basic applications, it may be possible to rely on some simple chips and circuits to achieve control, without programming. Note, however, that the so-called digital signal voltage of the gate level also requires 10 to 20 volts, so a small "drive circuit" is required between the control circuit and the IGBT for the signal conversion.

There are many other kinds of powerful switches that can be controlled by digital signals. As one of them, IGBT is characterized by the fact that it supports the highest switching speed at this current voltage level, switching nearly 10,000 times a second. In other words, the switching frequency of IGBT can reach the 10kHz level. So, what's the use of such a fast switch? Common strong electricity is only 50Hz alternating current(AC), transformers can change its voltage, but can not change its frequency, let alone turn it into direct current(DC). With the switch of IGBT, we can design a kind of circuit, by controlling IGBT, turning the AC on the power supply side into DC at a given voltage, or turning various kinds of electricity into the desired frequency of AC. These circuits are collectively referred to as power electronic circuits, and devices made of electrical electronic circuits are called converters. In particular, the circuit that turns AC into DC is called rectifier, and the circuit that turns DC into AC is called inverter, while the circuit of DC change DC is actually the most varied, generally directly called a converter.

At present, g-series high-speed train is using AC motors. Its structure is simple and power-saving, but the speed is difficult to adjust. Fortunately, there is a close relationship between its speed and the frequency of the input AC power supply, so converters of IGBT can be used to make strong electricity of voltage, frequency controlled, to flexibly control the speed of the motor. Reflected in the g-series high-speed train is the speed of it, which is called variable voltage variable frequency (VVVF) control. In addition to g-series high-speed train, such as electric vehicle, variable frequency air conditioner, wind driven generator and many other occasions used ac motors, are used to get IGBT and supporting such circuits to control the motor.