psunder
09-12-2010, 01:47 AM
I floated this idea a while back and received essentially no positive responses. Despite that fact, I figured I’d throw it out there one more time so someone can tell me why it wouldn’t be the most cost-effective method for powering an actuator.
Here is the motor:
At less than $300 and with over 20 horsepower, an actuator driven by this setup would require very little gear reduction, would be capable of massive force, and might be capable of travel rates exceeding a meter-per-second. For those not familiar, this is an outrunner brushless motor. The outside can spins instead of a typical motor where you have an internal core spinning. The result is massive torque and lower rpms. Moreover, these are extremely elegant motors, virtually silent and extremely well built.
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=14427&Product_Name=Turnigy_CA120-70_Brushless_Outrunner__(100cc_eq)
In order to power the motor, a simple speed control such as the one below could be used:
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=8937&Product_Name=Turnigy_Marine_180A_Brushless_Boat_ESC
This motor controller is not only cheap, it has the ability to brake the motor allowing for precise stopping in the target range of motion.
From a mechanical standpoint, I can easily think of several ways in integrate this system into an actuator so I certainly can’t imagine that be a substantial problem. However, I am no electronics expert, so I would not have a clue how to integrate this device electronically…. so maybe that’s where I don’t understand why this wouldn’t work.
Anyway, shoot the idea down so I can move on to other plans.
Pete
Here is the motor:
At less than $300 and with over 20 horsepower, an actuator driven by this setup would require very little gear reduction, would be capable of massive force, and might be capable of travel rates exceeding a meter-per-second. For those not familiar, this is an outrunner brushless motor. The outside can spins instead of a typical motor where you have an internal core spinning. The result is massive torque and lower rpms. Moreover, these are extremely elegant motors, virtually silent and extremely well built.
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=14427&Product_Name=Turnigy_CA120-70_Brushless_Outrunner__(100cc_eq)
In order to power the motor, a simple speed control such as the one below could be used:
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=8937&Product_Name=Turnigy_Marine_180A_Brushless_Boat_ESC
This motor controller is not only cheap, it has the ability to brake the motor allowing for precise stopping in the target range of motion.
From a mechanical standpoint, I can easily think of several ways in integrate this system into an actuator so I certainly can’t imagine that be a substantial problem. However, I am no electronics expert, so I would not have a clue how to integrate this device electronically…. so maybe that’s where I don’t understand why this wouldn’t work.
Anyway, shoot the idea down so I can move on to other plans.
Pete