Power semiconductor device is also called power electronic device or power device, it is a special switch with power management capabilities including frequency conversion, variable voltage, variable current, power management and so on. In computer, communication, consumer electronics, new energy, automobile, industrial manufacturing, and other fields have a wide range of applications. Today SPEA and you focus on the power device star IGBT module.

The industry generally divides power semiconductor openers into three categories:

Diode: The switching state is controlled by the main circuit (power circuit) itself, so it is also known as a passive switch, uncontrollable switch.

SCR: can be turned on by the control signal of low power, but can only have the main circuit (power circuit) itself to turn off and can not be turned off by the control signal, so it is also known as the semi-controllable switch.

Controllable switch: semiconductor controllable switch including GTO, IGCT, GTR, IGBT, VMOS and so on

In power devices, IGBT module is favored by various industries, and is even selected as a key support project of Chinese major science and technology. It has the advantages of both MOSFET(insulated gate type field effect tube) and BJT(bipolar type triode) two types of devices, switching speed, high input impedance, small control power, simple driving circuit, small switching loss, low conduction, on-state current, small loss, in high voltage, large current, high speed and other aspects of the same advantages.

What are the main application areas of IGBT power semiconductor?

IGBT module can be divided into low voltage (600V below), medium voltage (600V-1200V) and pressure (1200V-6700V), IGBT is mainly used for inverter inverter and other inverter circuit. Inverter the DC voltage into an alternating current with adjustable frequency. It has a cathode, an anode, and a control pole. The impedance is very large when the circuit is off, there is a small resistance when the connection is on, by connecting or disconnecting the control pole to control the connection between the cathode and anode and the switch off. Its main application areas are as follows:

I. New energy vehicles

In new energy vehicles, IGBT module is the core technical component of electric vehicles and charging piles and other equipment. IGBT modules account for nearly 5% of the cost of electric vehicles and about 20% of the cost of charging piles. IGBT is mainly applied in the field of electric vehicles in the following aspects:

1. The electric control system drives the motor after the high-power DC/AC (DC/AC) inverter.

2, vehicle air conditioning control system low-power DC/AC (DC/AC) inverter, the use of small current IGBT and FRD.

3. Charging pile IGBT module in intelligent charging pile is used as switching element.

2. Rail transit

IGBT devices have become the mainstream power electronic devices for traction converters and various auxiliary converters of rail transit vehicles. Ac transmission technology is one of the core technologies of modern rail transit. In the AC transmission system, traction converter is the key component, and IGBT is one of the most core components of traction converter

3, Power grid and household appliances

The power grid system is developing in the direction of intelligence. The power generation end, transmission end, transformer end and power end of smart grid are closely connected with IGBT. The rectifier and inverter in wind power generation and photovoltaic power generation all need to use IGBT module. FACTS flexible transmission technology in UHVDC requires extensive use of power devices such as IGBT, which is a key component of power electronic transformer (PET). In household appliances, microwave ovens, LED lighting drivers for IGBT demand is also continuing to improve.

4. Photovoltaic industry

IGBT is the core component of photovoltaic inverter and energy storage inverter. IGBT modules account for 15% to 20% of the value of photovoltaic inverters. Different photovoltaic power stations need slightly different IGBT products. For example, centralized photovoltaic mainly uses IGBT modules, while distributed photovoltaic mainly uses IGBT single tubes or modules.

The above is a brief introduction to IGBT devices, IGBT power devices need to carry out strict testing to ensure its quality, in the IGBT module test process, not only need advanced testing equipment, but also need professional and technical personnel to design a reasonable test scheme according to the requirements.