Phase Controlled Rectifier - SCR Drive

[jid]

I am aware that when using a PWM type DC controller, the DC Motor's Armature Voltage should be rated at, or above, the DC Bus Volts of the controller. This is necessary to prevent premature brush ware, as the motor is exposed to voltage spikes peaking at the DC Bus Volts during switching.

With a Phase Controlled Rectifier or SCR type DC drive, should the motor be rated for the maximum DC Voltage Output of the drive ?

If anyone can offer any input or comments on the above, please do so.

Thanks.