### Author Topic: Motor Bandwidth?  (Read 5435 times)

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#### vidam

• Supreme Robot
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• Robotronics.org
##### Motor Bandwidth?
« on: December 20, 2007, 09:30:46 AM »
What does it mean in layman's terms when they say that a motor has a movement bandwidth of 100KHz?

• Supreme Robot
• Posts: 11,702
##### Re: Motor Bandwidth?
« Reply #1 on: January 14, 2008, 09:29:44 AM »
got a datasheet?

perhaps it has to do with frequency response for PWM? . . . I wouldn't worry about it for hobby robotics . . .

#### vidam

• Supreme Robot
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• Robotronics.org
##### Re: Motor Bandwidth?
« Reply #2 on: January 30, 2008, 09:33:38 AM »
Actuator Power is the Frequency, f of operation is the maximum frequency at which the actuator is expected to operate. If time constant, τ is know it can be related to frequency via f=(2πτ)-1.

"useable movement bandwidth to about 100 kHz" must mean then that the motor can operate at this maximum frequency or anywhere in the bandwidth meaning it has pretty high force relative to displacement.

• Supreme Robot
• Posts: 11,702
##### Re: Motor Bandwidth?
« Reply #3 on: January 30, 2008, 10:15:43 AM »
yea . . . but how do you know what π or τ is?

Quote
Actuator Power is the Frequency
no thats not true . . . power is measured in watts and frequency is measured in Hz . . .

#### vidam

• Supreme Robot
• Posts: 423