Timeline for Small DC motor current limit
Current License: CC BY-SA 3.0
8 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Feb 17, 2014 at 21:39 | vote | accept | SomeEE | ||
| Feb 17, 2014 at 19:23 | comment | added | Phil Frost | @MathEE If the absence of specific information to the contrary, you should assume that the stall current says nothing about the maximum continuous current. Stall current allows you to infer DC resistance, and thus, speed regulation and maximum torque. It also gives you some idea of the maximum current your drive might need to handle. It's also possible to have more current than the stall current: try driving the motor against the direction of mechanical forces. | |
| Feb 17, 2014 at 18:43 | answer | added | Olin Lathrop | timeline score: 2 | |
| Feb 17, 2014 at 18:32 | comment | added | user16324 | Heatsink won't save the motor if the brushes burn out. It really does depend on the motor (carbon brushes are usually tougher than the metal ones) | |
| Feb 17, 2014 at 18:12 | comment | added | Emyr | You can add a heatsink if you can't avoid stall; RC shops may have an appropriate diameter heatsink to wrap around the casing. | |
| Feb 17, 2014 at 17:59 | comment | added | SomeEE | That is what I thought. I wish they would clarify in the datasheets whether the lack of information about maximum current is or isn't because the motor is fine when stalled. | |
| Feb 17, 2014 at 17:45 | comment | added | Andy aka | I don't think you can generalize - some motors will sit happily in stall all day - they might get fairly warm but they won't go pop. Other motors might fry if left in stall for over a minute or so. | |
| Feb 17, 2014 at 17:26 | history | asked | SomeEE | CC BY-SA 3.0 |