176VDC - 10A power supply
You should not use a "power supply" for a 176V, 6A DC motor. Such a motor is intended to be powered by some type of electronic speed control (ESC) that controls both the voltage and current so that the motor does not draw too much current when starting and accelerating. It is likely that the motor requires both a variable voltage for the armature and a fixed voltage for the field. To get the best advice on ECS requirements, you should post the complete data listed on the motor's rating plate. It is likely that an appropriate ESC could be supplied directly from 230V AC.