B
BobG
- Jan 1, 1970
- 0
The standard slot car motor was a 3 pole mabuchi motor with two
magnets on the side of the case. The poles were 120 degrees apart. I
assume that every 60 degrees, the next pole was energized and pulled
toward the closest magnet. Now consider replacing the commutator
segments with slip rings... gnd, and coil a,b,c. Q1) If I energize
coil a, does it rotate to the center of only one magnet? Either
magnet? Or to one edge of either magnet? I assume if I energize the
coils in sequence a,b,c the armature will rotate. I can compute the
ampere turns of each coil. Q2)Is the max torque when the force of the
electromagnet equals the force of the permanent magnet? Q3) Is the
strength of the permanent magnet measured in gauss? webers? teslas?
How many gauss in a 1"" magnet like this? And now the last stupid
question... (yaaay!) Q4) How do I convert magnetic strength of the
permanent magnet to newtons so I can calc torque? I think the force of
the electromagnet is NIB, but the permanent magnet doesnt have any N
or I, so I'm confused as usual.
magnets on the side of the case. The poles were 120 degrees apart. I
assume that every 60 degrees, the next pole was energized and pulled
toward the closest magnet. Now consider replacing the commutator
segments with slip rings... gnd, and coil a,b,c. Q1) If I energize
coil a, does it rotate to the center of only one magnet? Either
magnet? Or to one edge of either magnet? I assume if I energize the
coils in sequence a,b,c the armature will rotate. I can compute the
ampere turns of each coil. Q2)Is the max torque when the force of the
electromagnet equals the force of the permanent magnet? Q3) Is the
strength of the permanent magnet measured in gauss? webers? teslas?
How many gauss in a 1"" magnet like this? And now the last stupid
question... (yaaay!) Q4) How do I convert magnetic strength of the
permanent magnet to newtons so I can calc torque? I think the force of
the electromagnet is NIB, but the permanent magnet doesnt have any N
or I, so I'm confused as usual.