3Kwatts! Consider how hot a 300 watt light bulb will get and multiply by ten. 3000 watts is equivalent of the heating element in your electric oven.
But admittedly much of that heat is dumped in the motor and not the h-bridge. Also, is that 3kwatts at motor stall or motor no load? For any h-bridge to survive, it has to be engineered to handle the current load of a stalled motor that may be about 5 times higher than the no load current. Of course, fuses do help as protection, but start up is a stalled condition and you have to provide enough current under load to make the motor move. Fuses have to allow the motor to start and may not eliminate all the stress
Then look at IC packages and you will generally notice that they dissipate about 1 watt. A TO-220 package with heat sink might handle about 50 watts.
In order for an IC to work and work well, the circuit would have to be about .9997 or better in efficiency. It is never going to happen.
With a BJT, the best you are going to do in saturation mode is about 0.3v of voltage drop and that is where your heat in the transistor is created. With Darlingtons, the best you are going to do is about 1.0v of voltage drop - so they are even worse about heat. If you know your operating voltage (lets say 36VDC) you can figure your current. 3000watts/36volts = 83 amps.
There are transistors that will handle 36 volts and 83 amps, but how much heat with the .3v drop produce? 0.3v x 83 = 24.9 watts of heat.
MOSfets come with a different number. The ON resistance and the best that you can do is about .05ohms of on resistance. Also, MOSfets can be wired in parallel, so two 50 watt packages can be used if you need to handle 100 watts.
MOSfets run the coolest, but all create some heat in managing as switches and all have limits to how much heat their packaging will tolerate before failure. Silicon generally fails at about 150 degrees centigrade.
If you want power you just cannot get away from heat and it is the heat that is destructive.
But I doubt that MOSfets are going to handle your frequency requirements.