[Qwerfk]

What free servo controller used for brush DC motor 400W ?

Is a four-pole DC motor mixed excitation
I have three of the DC motor.
Technical characteristics:
Supply voltage, 27 ± 10%
Current consumption, no more than 23 A
Power, W 400
Speed, r / min
9000
9600
7600
Hours of operation: long-term (continuous)
Dimensions mm: 107x181 (no fan)
Weight, kg, not more than: 3.5 kg (no fan)

According to my calculations - needs 16-18A continuous current for the operation, for 400W power on the shaft.

The site Uli, http://www.uhu-servo.de/servo_en/UHU% 20FAQ_en.pdf
I found the information that the controller:
"Q: What are the current limits of the UHU controller?
A: The limit is not the controller but the power circuit and the PCB. The common design with IRF540N MosFets
does up to 60 V and 20 A, the IRFP260N Version does up to 120V and 35 A. "

The project servo Elm-Chan (and other variations Elm) I not found max power (A, V), to which it was designed. Or is it better to use the HP UHU (High power) is as more modernized version.

Can I use the scheme servo drive on axis x, y.
And on the z-axis use stepper motor is?
Then from the third motor, can make the spindle.

Will I be able to do without reduction gear to reduce engine speed. And instead use PWM.

Power will be sufficient for cutting and machining aluminum.
Thank you in advance for your answers.