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Old Oct 18, 2012, 10:26 AM
fantasy1988 is offline
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built esc brushless sensorless for car,boat ?


Hello guy
brushless esc for airplane, I found that very popular, the circuit and the program a lot, but I do not see any documentation about making esc for car, it might be difficult?
who have successfully made this esc with atmega 8? We hope to receive your share of this topic
Thank you all


Last edited by fantasy1988; Feb 07, 2013 at 07:29 AM.
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Old Oct 18, 2012, 12:19 PM
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Car esc's are arguably a bit more difficult because of a few issues:
1) You need good starting torque to get moving (where brushless ESCs struggle to figure out commutation at zero speed.
2) You have to deal with dissipating more energy in braking.
3) You might want reverse.

There is an absolutely massive thread on DIY brushless ESC strategies around here someplace. I suspect if you have a specific question, the answer likely lies there.
Old Oct 18, 2012, 07:13 PM
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Quote:
Originally Posted by CombatWombat View Post

There is an absolutely massive thread on DIY brushless ESC strategies around here someplace. .
hello combatwombat,Thanks for reply
can you show me the path to the topic ,okay?

I think the problem is hard, I'm going to buy a new one, then copy the program from the driver, and make the circuit like it, what do you think about this?
Old Oct 19, 2012, 01:32 AM
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this is a big challenge to make electronic

very very very difficult
Old Oct 19, 2012, 04:21 AM
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Quote:
Originally Posted by fantasy1988 View Post
I think the problem is hard, I'm going to buy a new one, then copy the program from the driver, and make the circuit like it, what do you think about this?
So rip off the software (even if it were possible) copy the circuit and build another one ?

Why ?
Old Oct 19, 2012, 04:39 AM
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So rip off the software (even if it were possible) copy the circuit and build another one ?

Why ?
hello you

I do not understand your comments, you can tell me more


I wanted to make it simple because I love what I do, I can buy it on hoppyking for 15 to 40 usd., but interesting feeling when successfully made it more value for money

design of the circuit, I'm pretty good, but the programming of the chip is so bad, I have read many books on the chip programmer for pic, avr, 8051 .... but still not quite up to it. . it interfere very much my rc projects
Old Oct 19, 2012, 04:49 AM
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hello all
I've found this article about the problem of the author Takao Shimizu
https://www.rcgroups.com/forums/show...00567&page=105 # post8056614
he use 8051f330 chips, this is a new chip designed brushless esc, I hope that he has the time to visit and share with us about this project





Old Oct 19, 2012, 11:06 AM
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i am very happy when you comment and share
Old Oct 19, 2012, 05:23 PM
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I believe the Atmel web site has several application notes for designing an esc for cars.

Airplanes use sensor-less ESC's which have very little starting torque and would not work very well in a car. Basically a sensor-less motor is only good for powering propellers. For a car a sensor-ed motor is much better and the ESC is actually simple. In fact you do not even need a micro as simple logic will work.

For example the MC33033 is a complete controller chip for sensor-ed motors. See http://www.onsemi.com/pub_link/Collateral/MC33033-D.PDF
Last edited by mjsas; Oct 19, 2012 at 05:31 PM.
Old Oct 19, 2012, 07:52 PM
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hello mjas
the use of Section 33033 can control motors, but its function is little, can not run reverse and brake.so I think it is not feasible

I've checked type esc brushless car hoppyking, they often use the chip 8051f 330, instead is atmega 8. what this is not difference ?
Last edited by fantasy1988; Oct 20, 2012 at 12:59 AM.
Old Oct 20, 2012, 04:48 AM
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8051f330 of silabs ?
Old Oct 21, 2012, 01:24 AM
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Old Oct 21, 2012, 08:45 PM
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Quote:
Originally Posted by fantasy1988 View Post
hello mjas
the use of Section 33033 can control motors, but its function is little, can not run reverse and brake.so I think it is not feasible
The MC33033 does have a reverse. To use this part you would need to use a micro to interface it to your radio. The micro would have to control the enable, f/r and provide a control voltage for speed control. To get a brake you would have to disable the MC33033 and provide a way to turn on the FETs to brake.

In any case, I mentioned the MC33033 to show how simple it is to control a sensored motor. I would not use the MC33033 as it would be much simpler to program a micro to do the whole job. With sensors you do not need to mess with start up and the motor provides full torque at all speeds including stall.
Old Oct 21, 2012, 10:00 PM
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hi mjsas
I have tried to find out about ic mc 33033, and I have found some circuit diagrams, we use China's electric bicycle. I think it's very useful.....






Old Oct 22, 2012, 05:25 AM
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maybe this thread does not get the attention of people because it might not be feasible, and too difficult


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