What is RB IGBT?

It stands for Reverse Blocking Insulated Gate Bipolar Transistor. Reverse-parallel connection of RB-IGBT enables both way switching. It is incorporated in AT-NPC (Advanced T-type Neutral Point Clamped) 3-level inverters, to increase the power conversion efficiency because there are less current passing elements.

What are IGBT modules?

IGBT (Insulated Gate Bipolar Transistor) module is a device required for inverter use in many types of industrial equipment, and had driven the trend towards high currents and high voltage since 1990.

How fast can an IGBT switch?

The typical switching time of IGBT is about hundreds of nanoseconds and the value varies with load current, junction temperature, and other factors [17–20]. However, the change of IGBT switching time is very small [4,5] (range from several to tens of nanoseconds) when the health status of the IGBT module changes.

Can IGBT block reverse voltage?

No. The IGBT cannot conduct current in the reverse direction (from emitter to collector) even with a positive Vge applied to it, because it has a bipolar-type structure.

What is reverse blocking capability?

(or on) state, and the reverse-blocking state, which is similar to that of a reverse-biased p-n junction. Thus, a thyristor operated in the forward region is a bistable device that can switch from a high-resistance, low-current off state to a low-resistance, high-current on state, or vice versa.

How many IGBT are in a VFD?

In a typical six pulse drive there are six IGBTs pulsing voltage up to 15,000 times per second. Since their introduction in the 1980’s, IGBTs have literally switched up the market and now play a large role in many modern day power electronics applications where speed and process control are needed.

Does IGBT work on AC?

The purpose of the AC-inverter is to transform the power from a DC-supply into 3-phase alternating current. This is done with six IGBT-drivers connected to a DC source. The IGBT- drivers are controlled through pulse width modulation (chapter 2.3) by a microcontroller or Page 6 computer.

What is forward blocking?

Forward blocking mode In this mode of operation, the anode (+) is given a positive voltage while the cathode (−) is given a negative voltage, keeping the gate at zero (0) potential i.e. disconnected.