VEVOR 3 Phase Converter - 5HP 15A 220V Single Phase to 3 Phase Converter, Digital Phase Shifter for Residential and Light Commercial Use, 220V Input/Output (One Converter for One Motor Only)

Yes, you can use a CPS-5HP on a 3HP motor.

No, you need to change the motor to three-phase 220 to use it.

This cannot be directly output to the coffee machine for use. Because there are many control devices on your coffee machine, you need to undergo a simple modification before you can use it. But this can drive the three-phase motor on your coffee machine to work properly, you need to have a certain modification ability

It not OK to assume the phase to phase voltage on the output will be 400V.

No, our current inverter converts single phase into three phases for three-phase asynchronous motors.