|
Permanent magnet brushless motors with higher torque- to-
inertia and higher efficiency have become a popular subject in
the application of servo control systems. In the recent years,
the idea of fault detection has been gradually applied to the
brushless motor drive for safety and reliability. When a tool
collides with the work-piece, the tool tip or servo mechanism
might be damaged because of the abnormal load torque. This
thesis investigates the abnormal load torque detection during
the manufacturing process,the system estimates the unknown
external load torque and then controls the motor to minimize
the damage as an abnormal load occurrs.The experimental system
is i mplemented using a high speed digital processor, the
TMS320C30. Some simulated and experimental results are given to
show the possibility of the proposed method.
|