Assuncao, E.Teixeira, MCM2014-05-202014-05-202002-03-01IEEE-asme Transactions on Mechatronics. New York: IEEE-Inst Electrical Electronics Engineers Inc., v. 7, n. 1, p. 99-100, 2002.1083-4435http://hdl.handle.net/11449/9674This note clarifies the design of proportional derivative (PD) controllers for the magnetic levitation systems of micro PM motors proposed in the above paper. It is shown that the PD controllers cannot stabilize the described levited micro motors because it is necessary to use other values of parameters for these controllers. We present necessary and sufficient conditions for the stability of the controlled systems described in the paper.99-100engcontrolderivative controllersmicro motorsstabilityEditorial10.1109/3516.990893WOS:000174454200012Acesso restrito8755160580142626