De Lucena, Samuel Euzédice [UNESP]Marcelino, Márcio Abud [UNESP]Grandinetti, Francisco José2014-05-272014-05-272007-01-01Journal of the Brazilian Society of Mechanical Sciences and Engineering, v. 29, n. 1, p. 21-25, 2007.1678-58781806-3691http://hdl.handle.net/11449/69476This paperwork presents a Pulse Width Modulation (PWM) speed controller for an electric mini-baja-type car. A battery-fed 1-kW three-phase induction motor provides the electric vehicle traction. The open-loop speed control is implemented with an equal voltage/frequency ratio, in order to maintain a constant amount of torque on all velocities. The PWM is implemented by a low-cost 8-bit microcontroller provided with optimized ROM charts for distinct speed value implementations, synchronized transition between different charts and reduced odd harmonics generation. This technique was implemented using a single passenger mini-baja vehicle, and the essays have shown that its application resulted on reduced current consumption, besides eliminating mechanical parts. Copyright © 2007 by ABCM.21-25engElectric vehiclesInduction motorsPWMSpeed controllersSpeed driveCostsElectric current controlMicrocontrollersPulse width modulationSpeed controlElectric vehicle tractionOpen-loop speed controlSynchronized transitionArtigo10.1590/S1678-58782007000100004S1678-58782007000100004WOS:000255218300004Acesso aberto2-s2.0-345487494142-s2.0-34548749414.pdf38638166978344992657204297944320