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(2) D. Pauly, et al.: “Brushless Servo Drives with Permanent Magnet Motors or Squirrel Cage Induction Motors-A Comparison”, IEEE-IAS Annu. Meet., p. 503 (1984)
(3) R. Lessmeier, et al.: “Microprocessor-Controlled ACServo Drives with Synchronous or Induction Motors: Which is Preferable?”, IEEE-IAS Annu. Meet., p. 529 (1985)
(4) S. Meshkat, et al.: “Optimum Current Vector Control of A Brashless Servo Amplifier Using Microprocessors”, IEEE-IAS Annu. Meet., p. 451 (1984)
(5) Hoang Le-Huy, et al.: “Minimization of Torque Ripple in Brushless DC Motor Drives”, IEEE-IAS Annu. Meet., p. 790 (1985)