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IvLabs / autonomous-delivery-robot

Repository for Autonomous Delivery Robot project of IvLabs, VNIT
http://www.ivlabs.in/autonomous-driving-platform.html
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Selection of Electric Hardware #8

Closed akshaykulkarni07 closed 4 years ago

akshaykulkarni07 commented 4 years ago

According to the motors recommended in this document, this is some analysis on those.

The servo motor mentioned has an input voltage range of 6 to 8.4 V. So, I don't think it will work at 5V. Since other devices will need 5V, our buck converter module would be set at 5V, and we would need a 2nd buck converter for this servo (not a huge problem w.r.t. cost if we use LM2596, but it will take up space). Also, current rating is not given for the servo, so that needs to be found out (because output rating of LM2596 buck conv is 3A, which is a common buck conv module, but we can get something else if required).

And the BLDC mentioned can run only on 3S or 4S batteries (11.1V or 14.8V), so we can choose the battery using this constraint of 3S/4S and the mAh rating. So, mAh requirement calculation is done or pending (I think we had done some part of it in the previous meeting)? This BLDC has a maximum current draw (as per it's datasheet which mentions it's current draw w.r.t. input voltage and which propeller is used) of around 40 A. So, the FlipSky VESC (50A rating) will do. This VESC also gives a 5V/1.5A port, so that's useful.

Add any other suggestions for hardware in this issue itself.

patilunmesh commented 4 years ago

Servo motor works well with 5V. Instead of BLDC we used simple DC motor directly connected to 6s lipo battery and L298N motor driver