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enter image description hereI want to simulate an H-bridge in pspice but it doesn't work and Z3 and Z6 (High side and low side IGBTs) can not drive at the same time. Here is my schematic enter image description here

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  • \$\begingroup\$ Refer V6 (and V3) to the emitters of their respective IGBTs. That's what a high-side driver would do. Also, 24V? Isn't that terrifically low for an IGBT application? \$\endgroup\$ – TimWescott Dec 18 '18 at 0:19
  • \$\begingroup\$ @TimWescott What do you mean? Should I increase the value of v6 snd v3?? \$\endgroup\$ – ali eskandari Dec 18 '18 at 4:34
  • \$\begingroup\$ When someone says that a voltage source is "referenced" to a node, they mean that it's - end is connected to that node. It is usual to reference voltage sources to ground, but in this case you need to connect the - end to the relevant IGBT emitter. You need the IGBT to turn on hard without exceeding its maximum \$V_{GE}\$ rating, even as the emitter voltage rises because it's on the high side of the switch. \$\endgroup\$ – TimWescott Dec 18 '18 at 17:54
  • \$\begingroup\$ Once you have the thing working in simulation, you're then going to need to realize that high-side gate drive in practice. The few times that I've worked with high-side IGBTs, I've used devices that came with companion gate drivers. If you're going to roll your own on a circuit that runs off of a really high voltage rail, then you'll need to do some searching for a circuit that'll get the job done without letting out all the magic smoke. \$\endgroup\$ – TimWescott Dec 18 '18 at 17:56

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