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What Is The Real Benefit Of Brushless?

 
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Old 06-01-2015, 03:00 PM   #1
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What Is The Real Benefit Of Brushless?


Why go brushless? What is the real benefit vs. brushed and is it worth the upgrade?
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Old 06-01-2015, 03:05 PM   #2
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Re: What Is The Real Benefit Of Brushless?


More powerful, better run times, less to wear out, smaller. What's there not to like about it.

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Old 06-01-2015, 03:35 PM   #3
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Re: What Is The Real Benefit Of Brushless?


A DC Brushless Motor uses a permanent magnet external rotor, three phases of driving coils, one or more Hall effect devices to sense the position of the rotor, and the associated drive electronics. The coils are activated, one phase after the other, by the drive electronics as cued by the signals from the Hall effect sensors, they act as three-phase synchronous motors containing their own variable frequency drive electronics.

BLDC Motor Pros

Electronic commutation based on Hall position sensors
Less required maintenance due to absence of brushes
Speed/Torque- flat, enables operation at all speeds with rated load
High efficiency, no voltage drop across brushes
High output power/frame size.
Reduced size due to superior thermal characteristics. Because BLDC has the windings on the stator, which is connected to the case, the heat disipation is better
Higher speed range - no mechanical limitation imposed by brushes/commutator
Low electric noise generation
BLDC Motor Cons

Higher cost of construction
Control is complex and expensive
Electric Controller is required to keep the motor running. It offers double the price of the motor

More here. http://www.dynetic.com/brushless%20vs%20brushed.htm
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Old 06-01-2015, 07:19 PM   #4
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Re: What Is The Real Benefit Of Brushless?


Quote:
Originally Posted by WBailey1041 View Post
A DC Brushless Motor uses a permanent magnet external rotor, three phases of driving coils, one or more Hall effect devices to sense the position of the rotor, and the associated drive electronics. The coils are activated, one phase after the other, by the drive electronics as cued by the signals from the Hall effect sensors, they act as three-phase synchronous motors containing their own variable frequency drive electronics.

BLDC Motor Pros

Electronic commutation based on Hall position sensors
Less required maintenance due to absence of brushes
Speed/Torque- flat, enables operation at all speeds with rated load
High efficiency, no voltage drop across brushes
High output power/frame size.
Reduced size due to superior thermal characteristics. Because BLDC has the windings on the stator, which is connected to the case, the heat disipation is better
Higher speed range - no mechanical limitation imposed by brushes/commutator
Low electric noise generation
BLDC Motor Cons

Higher cost of construction
Control is complex and expensive
Electric Controller is required to keep the motor running. It offers double the price of the motor

More here. http://www.dynetic.com/brushless%20vs%20brushed.htm
I was just about to say that!
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Old 06-01-2015, 07:51 PM   #5
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Re: What Is The Real Benefit Of Brushless?


In real world use the biggest thing I notice is way less heat under very hard use. Heat is just wasted energy, which is why we also see longer battery life and more power with the brushless tools.
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Old 06-02-2015, 11:57 AM   #6
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Re: What Is The Real Benefit Of Brushless?


If you have a bunch of batteries does brushless really matter?
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Old 06-02-2015, 04:29 PM   #7
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Re: What Is The Real Benefit Of Brushless?


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Originally Posted by bce0903 View Post
If you have a bunch of batteries does brushless really matter?
More power, lighter, smaller, less heat, longer lasting.
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Old 06-02-2015, 05:40 PM   #8
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Re: What Is The Real Benefit Of Brushless?


i bought 1st generation brushless [panosonic] . way more power and battery life . may not matter to your situation .for me i use the impact mostly . size of the tool matters to me -brushless are smaller . i do not like buying expensive batteries - i seem to of gotten at least double the battery life . hard to compare though since my non brushless lithiums hardly got used . I figure if a person is in the trades that the extra cost of brushless will far out weigh in money saved on battery's .
what a massive jump in quality ,power ,tool life ,weight etc going from nicad to litium ion brushless . things are changing .now to see if bosch 6ah battery is a big jump from makita 5ah . what will be next
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Old 06-03-2015, 10:35 AM   #9
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Re: What Is The Real Benefit Of Brushless?


I still haven't switched to the brushless world. Hasn't bothered me too much yet, these battery capacities are quite large also compared to a few years ago.

The thing I notice most with a non brushless model is circular saw performance. I like my dewalt 20v, but its power does not compare with a corded.
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Old 06-03-2015, 10:48 AM   #10
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Re: What Is The Real Benefit Of Brushless?


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Originally Posted by madmax718 View Post
I still haven't switched to the brushless world. Hasn't bothered me too much yet, these battery capacities are quite large also compared to a few years ago.

The thing I notice most with a non brushless model is circular saw performance. I like my dewalt 20v, but its power does not compare with a corded.
sounds like not really an issue for . but if you use them alot when you upgrade brushless most likely will be the economical thing to do .
i recently got Makita's brushless saw . it is out standing .Actually cuts treated 2x material easily . battery life is impressive .
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Old 06-03-2015, 12:25 PM   #11
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Re: What Is The Real Benefit Of Brushless?


Man, I am still trying to kill all my Dewalt 18v. I dream of the day I have light weight lithium ion batteries and brushless motors, lol. By that time I am sure there will be something better out. So far behind the times
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Old 06-03-2015, 03:22 PM   #12
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Re: What Is The Real Benefit Of Brushless?


im on the fence.
the dewalt drill and impact set in my local dealer is 369 euro for the brushed set and 569 euro for the brushless set.
200 euro will buy 2 4 ah batteries.

I don't think the extra cost is worth it.
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Old 06-03-2015, 03:31 PM   #13
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Re: What Is The Real Benefit Of Brushless?


wow 200 $ ,that does sound like alot .also consider the tool .the feel of the brushless model and the brushed . you will have substantial more power -do you drive big lags ? with the brushless i do not bring a charger [generally] i bring the battery home and charge it in the evening .occassionally doing alot of screws and big lags i will go through a battery in one day .
you will be happy no matter what .you can get the brushless next year and have two of everything ,can be handy
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Old 06-03-2015, 03:55 PM   #14
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Re: What Is The Real Benefit Of Brushless?


Ya, I don't drive a lot of lag screws, so thats one of the few things I have not switched to the 20v lineup yet. Until I kill my old one, not getting anything new.
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Old 06-03-2015, 04:57 PM   #15
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Re: What Is The Real Benefit Of Brushless?


With US prices its really a no brainer to go brushless but 200 EU is a good size jump so it may make sense to wait. The jump to brushless on a impact/ drill kit is probably less than 100 dollars.

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