An after-thought to maybe clear up some confusion.
A filtered circuit is simple. A capacitor of 1000 microFarads(uF) per amp will filter 60 cycles to about 5%. Sufficient on non-critical loads. But doesn't control the actual voltage. That's a function of the homebrew transformer I described earlier. For a motor load, filtering really isn't necessary. Maybe a few mics to keep down electrical noise, but even then no big deal. If the winding comes out to 23 volts or 26 volts, the filtering has no effect.
A regulated circuit is much more complicated and you would be advised to purchase one. I have been an EE for many years, longer than some of your responders have been alive. If I need a regulated supply, I won't build anything larger than an amp or so. Just buy one and be done with it.
But not for a motor load. Just build a transformer supply and use a speed control, usually a duty cycle controller. The supplier I often use (Marlin P Jones Surplus) has them for 10 or 15 bux or so. Several other sources have similar availability. They are not uncommon, albeit usually Chinese.
A regulated supply, on the other hand, will supply the rated voltage within a very tight tolerance, something as tight as +/- 0.24 volts or less. That's 1%, 1 in 100, and I don't see any reason for that sort of control. Two batteries in series will provide from 26+ at full charge to 20 volts or less at discharged. That's all you need for a motor load.
The transformer I suggested is a home brew job. It is not an accurate or precise device, but it is cheap. Not just in-expensive, cheap. Low end, no safetys, no enclosure, usually aluminium windings, but ok for testing. The prinary, at 120 volts, is rated for 6 amps or more. Therefore, the proposed secondary, at 24 volts, will be good for 4 to 5 times that. 24-30 amps.
The bottom line here is that you are dealing with an electric load, not an electronic one. The two are distinctly different fields. Many modern pursuits mix the two indescriminately, often to their and other's, despair. My TV, computer, and stereo are electronic. My machine motors, old ('68 Chev) truck, and most older equipment is electrical. The two are destinctly different. Your project seemsw to fall in the latter.