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Yes but be aware that with the high currents that our controllers can switch, come some constraints on mains power supplies. All our controllers use use 20kHz chopping and a transformer fed full wave rectified mains power supply will have a 100Hz or (120Hz in USA) output so you will need to have very good smoothing. Except at relatively low currents, a suitable transformer, rectifier and reservoir capacitor can prove very expensive, so a small battery with a suitable charger is a good [and often cheaper] alternative.
If you use a switch-mode mains supply, you should consider its operating frequency and how it will perform under full motor current chopped at 20kHz.
The main capacitor on the controllers is intended to be sufficient when used from a battery – which itself acts like a large capacitance. For high current use of a power supply you are probably going to require a lot of (expensive) extra capacitance here.
One other issue to be aware of is the voltages developed by regenerative braking. Many of our controllers feed power back into the battery during braking. If there is no battery then the regenerated energy can pump up the power supply voltage to a high level if the motor is stopped too quickly. Although our controllers are protected against such over-voltage, it may damage your power supply.