So to begin with, learn the basics of IGBT. IGBT: IGBT stands for "Insulated Gate Bipolar Transistor. Are there electrical thingymajigs teddies?“This is a very interesting device, It sort-of helps us to decide who gets the electricity and when & where it goes. This is analogous to a light switch in your house that switches the electricity on or off. IGBTs are the core components within many machines and devices we use in our daily lives, such as cars, trains or even computers. Many of our electronic devices would not work as well without IGBTs.
For the IGBT to operate correctly and efficiently, we need to control something called “gate current.” A bad gate current is the energy switches on and off. In the car analogy, you could say it is like the plug that turns a vehicle on. And if the key does not turn, no matter how new your battery is locked? The same idea applies here. The consequence is that IGBT cannot operate correctly (turn on/off) if the gate current causes loss.
From here it begs the question, how do we regulate the gate current? Plus, we have to test it with a suitable amount of power. If the IGBT can not turn on and off fast enough, large issues in whatever device it is trying to control will occur for lack of power. The gate current needs to be monitored so that everything remains amicable.
So the reason why gate current is such an important parameter will be discussed next. This is actually the answer we hope, which can make the IGBT switch quickly. Consider how you operate light switch. Any delay, just the second you switch it (refer to video). That is how the IGBT should operate too. Overheating may also spoil the device, if switching is much time taking that it gets problematic. Overheating can be a problem because it damages the IGBT, making bad things happen to the device itself.
Moreover, it may reduce the energy efficiency since if you switch IGBT on slowly (which is bad for itself in rise time) some extra power will be lost — means that not only we do this wrong to device but also pay money back from our house account. Therefore, getting the gate current just right is crucial in order to ensure everything does what it needs to.
So how do you control that power better using IGBTs? A gate driver is one of the ways to do this. These pulse tools can give more power to the gate, allowing better and faster switching ON/OFF of IGBT. It helps reduce the chances of overheating, which in turn is vital to maintaining our devices and a well-functioning system.
Another way for us to do this is by using soft switching. This makes the IGBT turn-on and off slower, so that it would not overheat as easily and could lead to higher efficiency. As names imply, soft switching normally adopts in powerful machines such as electric cars and trains to make machine works better than before also helps many energy be saved.
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