Cheapest/best power supply for 7 different types of motors

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SUMMARY

The discussion centers on the optimal power supply configuration for a device utilizing five 5V stepper motors (3A each), one variable-speed brushed DC motor (12V to 48V, 350W), and a 12V heater (40W). The consensus is that using three separate power supplies for 5V, 12V, and 48V is the most effective solution. Alternatives involving a dual power supply with voltage regulators for the stepper motors are deemed inefficient and impractical, particularly for one-off projects due to the complexity of building buck or boost converters at these power levels.

PREREQUISITES
  • Understanding of power supply specifications (voltage, current, wattage)
  • Knowledge of stepper motor and brushed DC motor operation
  • Familiarity with voltage regulation techniques
  • Basic concepts of buck and boost converters
NEXT STEPS
  • Research suitable 5V power supplies for multiple stepper motors
  • Explore options for 12V and 48V power supplies for high-wattage applications
  • Learn about voltage regulator types and their applications in motor control
  • Investigate the design and implementation of buck and boost converters
USEFUL FOR

Electronics engineers, hobbyists building motorized devices, and anyone involved in designing power supply systems for mixed-voltage applications.

Sebastian B
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Hello community,

I am building a device for which I will be using five Stepper motors (each 5v, 3a) and one brushed DC motor whose speed has to be varied and operates between 12V and 48V (350Watts). Also I have a heater which runs at 12V, 40Watts. My question is: How will I best power these different types of electronics? Should I use 3 different power supplies with 5V,12V and 48V or should I use a dual power supply with 12V and 48V and use a voltage regulator for each 5V, 3A motor or is there a better way to go about this?

Appreciate the help
 
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I think you need 3 supplies in some form. Buying a huge 12V supply and regulating to 5V 15A (5 3A motors) is not a good plan.

There are other possible ways, but they all involve building buck or boost switching converters which are A. Not trivial at your power levels, and B. not worthwhile for a one-off project.
 
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