Subject:
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Re: designing new NXT parts (propeller and motor) using rapid prototyping
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Newsgroups:
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lugnet.robotics.nxt
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Date:
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Mon, 31 Dec 2007 09:22:32 GMT
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Viewed:
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30339 times
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> First, you mention the NXT limits the total output current to 180 mA. I think
> this might be in error. For instance on Philo's excellent page on the NXT motor,
> he mentions that the NXT can support it at 15 N•cm torque, corresponding to a
> current of about 500 mA, and it can easily exceed this to at least 800 mA for a
> short time (before thermal protection engages, not due to a limitation the
> driver in the NXT).
Indeed, this 180mA limitation is the one of the 4.3V power supply, that feeds
the sensors and the motor position encoders. The motors themselves can receive a
much higher current, limited by their own thermal protection and by the maximum
current of motor driver inside the NXT (about 800mA permanent, can be higher for
short periods)
Philo
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