How to calculate the current used by a BLDC motor under load?

Discuss How to calculate the current used by a BLDC motor under load? in the DIY Electrical Advice area at ElectriciansForums.net

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Mark Markus

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I'm working on a robotics project and currently we are designing a battery. This battery is dedicated to the motor driver and two BLDC motors. I want to know how much current the battery will draw if we drive the robot at a certain speed. More specifically, how to calculate the speed of a BLDC motor at certain loads and the current required at that speed. Our design has rear-wheel drive and an electric motor connected to a gear system that turns the wheels.

Motor/Driver Links:
1. 36V 4000RPM 0.44Nm 184W 7.3A Ф57x109mm Brushless DC Motor - 57BLR110-36-01|STEPPERONLINE - https://www.omc-stepperonline.com/36v-4000rpm-0-44nm-184w-7-3a-%D1%8457x109mm-brushless-dc-motor-57blr110-36-01
2. Digital Brushless DC Motor Driver 18V-50VDC Max 10A 200W - BLD-510S|STEPPERONLINE - https://www.omc-stepperonline.com/digital-brushless-dc-motor-driver-18v-50vdc-max-10a-200w-bld-510s
 
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