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Absorption Circuit

2019-03-29

Absorption Circuit, also known as snubber circuit, is an important protection circuit for power electronic components. The snubber circuit can be used not only for the protection of semi-controlled devices, but also for fully controlled devices (such as GTR, GTO, power MOSFET and IGBT).

The basic working principle of the snubber circuit is to suppress the current rise rate (di) of the device by utilizing the characteristic that the inductor current cannot be abrupt, and to suppress the voltage rise rate (dv) of the device by utilizing the characteristic that the capacitor voltage cannot be abruptly changed.