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What is an IGBT transistor?
The most basic function of an IGBT is the fastest possible switching of electric currents, thus achieving the lowest possible switching losses. As the name “Insulated Gate Bipolar Transistor” reveals, an IGBT is a bipolar transistor with an isolated gate structure; the gate itself is basically a MOSFET.
What is IGBT technology?
The answer to these questions lies within the technology itself. From speed-controlled, low-power compressor drives in refrigerators to traction drives in railways: the IGBT has taken over a dominant position within the last decades.
Why is the power to control an IGBT 0?
The RMS value of the gate current sums up to almost zero. Therefore, you hear very often that the power to control an IGBT is zero. This simplification often is a root cause for troubles in designing the application.
How does an IGBT work?
The fundamental function of the IGBT is rather simple. A positive voltage UGE from gate to emitter turns on the MOSFET. Then, the voltage connected to the collector can drive the base current through the bipolar transistor and the MOSFET; the bipolar transistor turns on and the load current can flow.
Why is IGBT a good power electronic device?
As a power electronic device, the IGBT is optimized for high switching speeds. Operating it in linear mode similar to MOSFETs in former audio amplifiers is highly undesirable. This mode of operation would lead to massively increased losses. With the output characteristics of the bipolar transistor, further features of the device result.
Are power electronics technology a viable alternative to IGBTs?
In recent years, the potential of power electronics technologies to for various applications, which exhibit lower power loss than IGBTs efficiently use energy and thereby help realize a sustainable society because of the injection enhancement (IE) effect (Figure 1). has been a focus of rising expectations.