IR2130 + 3 pahse inverter

Thread Starter


Joined Mar 12, 2009
i'm building a three phase voltage inverter, i'm using IR2130 and i bulid the circuit of that IC exactly as the datasheet .i connect the IC with IRFP460 Mosfet.

the pulses out of the driver are ok for the lower 3 pulses and upper 3 pulses(bootstrap) with dc bus voltage =zero.

when i increase the dc bus voltage, the lower pulses are still dine, but the upper pulses( bootstrap pulses) decrease to zero.

i use 10uf capacitors and 1N4001 for bootstrap.

please can any one help me urgently.

thanks in advance