5SHY3545L0016 3BHB019719R0101 ABB Medium voltage converter IGCT module

IGCT gate circuit, 5SHY3545LO009 5SHY3545L0016 contains a large number of IC and resistance capacitors, especially a large number of electrolytic capacitors, in order to provide large turn-off current, so that it has a certain life limit; Moreover, the capacitor is not replaceable and must be replaced together with the entire device, resulting in increased maintenance costs. If the device fails, for the IGBT system, generally replace the driver circuit or IGBT, the price is less than 1500 yuan, and the conventional voltage IGBT and its driver circuit in the mainland market agents stand many, generally have spot; And for the IGCT system, the whole IGCT must be replaced, the replacement of a general more than 20000 yuan, its domestic agents are only a few, due to the occupation of capital, generally no spot, so once there is a failure, the maintenance cycle is long, the cost is high, and because of the complexity of the device, the maintenance of the technical personnel is very high, After the warranty period is often at the mercy of others. In circuit design, IGBT only needs a small and relatively simple buffer circuit, sometimes even can omit the buffer circuit; In addition to the voltage buffer circuit, IGCT must also have a current buffer circuit to inhibit the secondary breakdown at shutdown, which is more complex than IGBT. The current IGBT and IGCT on and off loss are similar, the frequency converter, the efficiency is not different. The main advantage is that the voltage resistance of IGCT is currently higher than that of IGBT, which makes the device less when used in high voltage inverter. But current wind power converters are 690V, and the IGBT voltage is enough. IGCT previously had the advantage of high current and convenient series application,
4500V/4000A is very common, and now it is slowly caught up with IGBT. IGBT has 4500V/1200A, which can be connected in parallel and is not convenient to be connected in series. The disadvantages of IGCT are that the switching frequency cannot be too high, the waveform is not as good as IGBT, the loss is large, the harmonics are large, the algorithm is more demanding, and the price is expensive. IGCT is widely used in large current situations, such as steel rolling environment, 3300V, tens of thousands of kw power, three-level IGCT inverter (Siemens SM150) to play the best control performance.