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NIGERIA • + Follow

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NIGERIA
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Proteus 8

Description

Bipolar PWM BLDC ESC

This project aims to build a sensor-less brushless DC motor controller. It is inspired by the curiosity of how BLDC motor ESCs work. The ESCs were intended to be used on drones, robotic trolley, and/or electric tricycle as undergrad projects before they were scrapped.

The controller uses bipolar PWM which is generated from an IR2104 chip which is in-turn powered from an ATMega328P microcontroller. A series of PN2222 BJTs were used to switch/control what phases were activated at a time during commutation. Each phase of the motor is fed a PWM from IR2104 chips. A zero-crossing algorithm is used to manage commutation cycle.

Code

BLDC driver firmware

https://github.com/iudah/bipolar_pwm_bldc_driver

Download Gerbers Download BOM(Bill of materials)

Sep 04,2025

335 views

Bipolar PWM BLDC ESC

2 Layers PCB 97.5 x 150 mm FR-4, 1.6 mm, 1, HASL with lead, Green Solder Mask, White silkscreen

This is a sensor-less bipolar PWM BLDC motor driver based on IR2104 half bridge MOSFET driver.

335

Published: Sep 04,2025

Standard PCB

Download Gerber file 3

BOM(Bill of materials)

Centroid file

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