*Article* **Speed Control with Indirect Field Orientation for Low Power Three-Phase Induction Machine with Squirrel Cage Rotor**

**Robert R. Gomes \*, Luiz F. Pugliese, Waner W. A. G. Silva, Clodualdo V. Sousa, Guilherme M. Rezende and Fadul F. Rodor**

> Institute of Technological Sciences, Federal University of Itajubá, Itabira 35903-087, Brazil; pugliese@unifei.edu.br (L.F.P.); waner@unifei.edu.br (W.W.A.G.S.); clodualdosousa@unifei.edu.br (C.V.S.); guilhermemre@unifei.edu.br (G.M.R.); fadulrodor@unifei.edu.br (F.F.R.)

**\*** Correspondence: robertribeiro@unifei.edu.br; Tel.: +55-(31)-98815-1828

**Abstract:** Induction machines are widely used in the industry due to their many advantages compared to other industrial machines. This article presents the study and implementation of speed control applied to a Three-phase Induction Machine (MIT) of the squirrel cage type. The induction motor was modeled using the rotor flux in the synchronous reference to design Proportional-Integral (PI) type controllers for the current and velocity control loops. It is the objective of the article also to present in detail the development of converter hardware that comprises the stages of power, acquisition, and conditioning of engine signals. The system was simulated using computational tools and validated using a prototype designed, constructed, and commissioned.

**Keywords:** induction machines; electrical machines; vector control; SVPWM modulation; frequency inverter
