Dynamic Breaking
Ugha
Posts: 543
I feel like such a noob.
I've been trying and trying to find out info on dynamic breaking but with very little success.
I understand how to do it with an h-bridge, but I don't understand the basics behind it.
I have a few project-related questions in addition to my vague request for info...
A: Does dynamic breaking damage a motor?
B: Can a motor set to break with an h-bridge "hold" its position under light stress?
C: Will holding a motor in dynamic breaking cause it to heat up like it does to keep it in a stall state?
Will holding a motor in dynamic breaking damage my h-bridge (1amp max)
E: Is dynamic breaking one aspect of how a servo holds a position?
And finally a related, but not exactly on topic question...
I understand that spinning a motor generates an approx charge of what it would take to make the
motor spin at that speed (IE: if spinning a motor at 2000 rpm requires 5 volts, then spinning its shaft
by hand at 2000 rpm will generate 5 volts)... but does using a normal hobby motor to generate
power damage the motor in any way (beyond normal brush wear that would occur when using the
motor normally)?
I've been trying and trying to find out info on dynamic breaking but with very little success.
I understand how to do it with an h-bridge, but I don't understand the basics behind it.
I have a few project-related questions in addition to my vague request for info...
A: Does dynamic breaking damage a motor?
B: Can a motor set to break with an h-bridge "hold" its position under light stress?
C: Will holding a motor in dynamic breaking cause it to heat up like it does to keep it in a stall state?
Will holding a motor in dynamic breaking damage my h-bridge (1amp max)E: Is dynamic breaking one aspect of how a servo holds a position?
And finally a related, but not exactly on topic question...
I understand that spinning a motor generates an approx charge of what it would take to make the
motor spin at that speed (IE: if spinning a motor at 2000 rpm requires 5 volts, then spinning its shaft
by hand at 2000 rpm will generate 5 volts)... but does using a normal hobby motor to generate
power damage the motor in any way (beyond normal brush wear that would occur when using the
motor normally)?
Comments
While I'm no expert on Dynamic braking, I leave this to some with more experience.
How ever the little DC motors can be used as a DC generator. This will have a small current output and should not be overloaded. If You have the motor specs, The max drive current will be the MAX output current in the generator mode.
The motor will wear the same,weather in the motor mode or the generator mode if the spec's are followed with motor/generator current.
Mechanical failure will usually be the problem with the little motors, If the current limits are followed. This is usually due to misalignment issues that cause bearing/bushing failures
I'd lookup motor/generator overloads, for some more info.
______________$WMc%____________
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
The Truth is out there············································ BoogerWoods, FL. USA
Leon
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Amateur radio callsign: G1HSM
Suzuki SV1000S motorcycle
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Aka: CosmicBob
http://forums.parallax.com/showthread.php?p=739652
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Beau Schwabe
IC Layout Engineer
Parallax, Inc.