Steven Keeping writes:
The brushless DC (BLDC) motor is becoming increasingly popular in sectors such as automotive (particularly electric vehicles (EV)), HVAC, white goods and industrial because it does away with the mechanical commutator used in traditional motors, replacing it with an electronic device that improves the reliability and durability of the unit.
An Introduction to Brushless DC Motor Control - [Link]
Texas Instruments has introduced two 3-phase, brushless DC (BLDC) motor drivers that allow designers to spin motors in minutes rather than months. [via]
Traditional BLDC motor designs require five to ten components, along with firmware. The sensorless 5-V, 680-mA DRV10866 and the 12-V, 1.5-A DRV11873 cut this component count to one with no firmware required, significantly reducing board space and system costs. The devices also provide the lowest operating voltage and standby current to reduce power consumption by up to 75%.
Spin Motors in Minutes Without Using Sensors - [Link]
The New and Improved Brushless Electric Scooter Power System Guide. Charles writes – [via]
In 2008, I put together a guide on Instructables about upgrading the power system of your small personal electric vehicle . It was a primer on the basics of an electric vehicle power system and offered resources and tips specific to compact electric scooter conversion. As of right now, it has a solid 5 rating – I didn’t know you could write that much on Instructables without telling anyone how to build anything and still receive perfect reviews.
I am delighted to report that in 2011, three years after the fact, that putting together a compact, powerful, and efficient electric vehicle drivetrain for local commutes (such as your campus, neighborhood, or urban area) using both R/C hobby hardware and specialized EV components is now cheaper and easier than ever. Price competition, new technologies, and just plain increased availability of fabrication and material resources means that building an electric personal transport device is now within the capabilities of just about everyone.
I will assume that you already know the fundamental parts of an EV or have built them before. If not, you’re welcome to refer to my previous Instructable on this topic (linked above), or check out one of the many great Instructables on EV systems. This Instructable is intended as a conglomeration of resources, and so will discuss the pros and cons of component choices, specific vendors, design strategies, and other high-level considerations. It will also offer tips and tricks that I’ve found or had passed on to me pertaining to building small electric scooters. The guide will be overtly calibrated towards said scooters, since I favor them over electric bicycles, though much of the advice is just as pertinent to e-bikes. It should also be helpful for the occasional odd electric skateboard or other unconventional vehicle.
The format of the Instructable will primarily be a page or two on each primary component of an EV – such as the motor, controller, battery, and drivetrain (and associated mechanics).Then I’ll present some designs that have emerged as being relatively easy to execute and fabrication advice for fully custom vehicles (i.e. not conversions).
The New and Improved Brushless Electric Scooter Power System Guide - [Link]
Andrew Angellotti writes:
Hey folks, this post is about my approach to building a pretty basic dual brushless motor controller. I’m going to focus on the power section in this post, and as soon as I have time I’ll discuss the code/FroBoard side of things in another post. I got started on the power section last night after a copious amount of coffee, and wrapped it up this morning- it’s a pretty simple build if you’re used to building stuff on perf board. I firmly believe that the best way to learn how something works is to build it yourself- that’s how I learned about electric cars, and brushless motor control is no exception. So if you want to learn how brushless motor controllers work, build one!
DIY Brushless Motor Controller – [Link]
This project shows how to implement an Electronic Speed Control (ESC) for controlling brushless DC motors. The design is based on an Arduino Duemilanove. To make a Brushless DC motors to work you have to use a motor controller to produce a three phase DC square wave. The test circuit uses 6 2N2222 transistors and six LEDs to help you notice which transistor is switched. Check details on the link below. [via]
This article discuss how to implement a Brushless DC Motor Controller. It’s not complete yet but gives some literature on the topic. It talks about what a BLDC motors is and what are the methods of controlling such a motor. There will be updates on the progress.
Implementing a Brushless DC Motor Controller – [Link]