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I'm not entirely sure how to choose power supply for bldc motor. I have 2 80wat motors with controller (black box, i cant find out what inside), but stall current for both of them can be close to 80A. Controller has 3 wires conected directly to motor. Can I buy simple power supply for 24V and install in series diode for 80A like in this article https://www.heliosps.com/dc-power-supplies-dc-motors/? This would be enought for protecting from damage and also make proper condition for this motors? Or maybe use additional shunt regulator? Thanks for your help.

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80W motor with current of 40A and supply of 24V? Makes no sense at first look, but this 40A stall current is measured at speed = 0 (rotor locked), this is not a working range of the motor

Your driver works as buck converter, so you don't need 2 x 40A x 24V supply power. You should use the nominal current of the motor, not the stall current for proper supply calculation, the short term high current can be supplied by a capacitor bank. Look also for max. peak motor current, not a stall current.

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    \$\begingroup\$ Datasheet provide nominal and stall currnet. Also do I need special power supply for that? Maybe can you suggest specific product? What about protection? \$\endgroup\$
    – Toriam
    Aug 7, 2020 at 13:53
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    \$\begingroup\$ You didn't provide any data about motor and driver, only a useless 3rd party link. \$\endgroup\$ Aug 7, 2020 at 15:33
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    \$\begingroup\$ Driver is EPOS4 50/15 from maxon and motor is EC-i 30 and EC-i 40 from maxon also \$\endgroup\$
    – Toriam
    Aug 8, 2020 at 19:00
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    \$\begingroup\$ @Toriam Sum the two noninal currents, add some reserve and you get it. I guess somewhere in the range of 5A. \$\endgroup\$ Aug 9, 2020 at 11:03
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    \$\begingroup\$ Do i need additional protection? Like a diode in series? \$\endgroup\$
    – Toriam
    Aug 10, 2020 at 16:47

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