Text this: Computerised control of DC motor field weakening and constant power performance

 _    _     ______   _    _      ___     _    _   
| || | ||  /_   _// | || | ||   / _ \\  | \  / || 
| || | ||   -| ||-  | || | ||  / //\ \\ |  \/  || 
| \\_/ ||   _| ||_  | \\_/ || |  ___  ||| .  . || 
 \____//   /_____//  \____//  |_||  |_|||_|\/|_|| 
  `---`    `-----`    `---`   `-`   `-` `-`  `-`