Commonly used IGBT modules for uninterruptible power supply

What is IGBT used for?

Sep.1998 2.0 Main Applications for Power Modules Power modules are now commonly used in both converter and inverter circuits. As shown in the application chart in Figure 2.1, the main application of the IGBT is for use as a switching component in inverter circuits which are used in both power supply and motor drive applications.

What are the advantages of using IGBTs in UPS?

IGBTs have the advantages of easy driving of power MOSFETs, simple control, high switching frequency, and low turn-on voltage of power transistors. The power devices used in UPS include bipolar power transistors, power MOSFETs, thyristors and IGBTs.

What are IGBT modules?

To streamline the use of IGBTs in power systems, they are often packaged together in units known as IGBT modules. These modules contain multiple IGBT components and other supporting circuitry in a single compact, insulated package.

Can an IGBT be connected to a power-MOSFET?

It is possible to associate an IGBT with a darlington configuration between a high-voltage PNP bipolar transistor and a power-MOSFET (see Figure 3). The idea behind this power device is to overcome the difficulty in increasing the power MOSFET current handling capability.

Why do IGBT modules have electrical isolation?

The design of IGBT modules often includes electrical isolation between the high-power switching circuits and the low-power control inputs. This isolation prevents damage to sensitive control systems and helps maintain safety in high-voltage applications.

Why is IGBT used in AC circuits?

The symmetry in structure provides symmetrical breakdown voltage characteristics i.e. the forward and reverse breakdown voltages are equal. Due to this reason, they are used in AC circuits. Unlike BJT, IGBT is a voltage-controlled device that requires only a small voltage at its gate to control the collector current.