I've been researching several drive systems for my Monarch. When I purchased the lathe it had the 3HP DC motor, but the rest of the lathe was gutted, no drive, no DC control panel, and no transformers. I've looked at AC motors with VFD control, the Beel Industrial Control D510-FWCH, and I've looked at the Parker 514 solution that has been documented within this forum.
Recently I found a 3 phase DC drive that provides 230 VDC for the armature and field weakening within a 4 quadrant package. If I understood the technical information correctly, the digital drive requires a tach that inputs actual speed, once the base speed of the motor is achieved, the field weakening kicks in to achieve the selected RPM. You can select the maximum armature voltage and the minimum field voltage within the setup.
For the gray beards out there (i.e. PM experts), has this drive been discussed before? I couldn't find it using the search function.
Are there any glaring details that I'm missing (besides cost
)?
Bottomline, I'm interested in this because it seems to be the less complex way to keep the DC motor. Based on the tech info, just hookup 3 phase power via a contactor, a tach sensor, and the existing 10EE controls.
Here's the link to the product page.
Polyspede SPEDESTER Series
Recently I found a 3 phase DC drive that provides 230 VDC for the armature and field weakening within a 4 quadrant package. If I understood the technical information correctly, the digital drive requires a tach that inputs actual speed, once the base speed of the motor is achieved, the field weakening kicks in to achieve the selected RPM. You can select the maximum armature voltage and the minimum field voltage within the setup.
For the gray beards out there (i.e. PM experts), has this drive been discussed before? I couldn't find it using the search function.
Are there any glaring details that I'm missing (besides cost

Bottomline, I'm interested in this because it seems to be the less complex way to keep the DC motor. Based on the tech info, just hookup 3 phase power via a contactor, a tach sensor, and the existing 10EE controls.
Here's the link to the product page.
Polyspede SPEDESTER Series
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