Power module unit diagram of IGBT and freewheeling diode

(a) shows a single switch module; (b) shows a two-unit (half-bridge) module; (c) shows an H-bridge (single-phase bridge) module; (d) shows an asymmetric H-bridge module ; (e) shows the three-phase bridge (six-unit or inverter bridge) module; (f) shows the chopper module; (g) shows the chopper module; (h) shows the three-phase bridge GD Add a chopper GAL (brake chopper circuit) module; (i) shows a three-unit module, consisting of 3 sets of switches; (j) shows a single switch plus a collector terminal in series with a diode (reverse blocking switch) Module; (k) shows a single switch plus a series diode on the emitter terminal (reverse blocking switch) module; (i) shows a two-unit module with a series diode (reverse blocking switch).