| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a torque control system and a torque control method for an induction motor of an electric automobile. <P>SOLUTION: A method includes the steps of: outputting d-axis and q-axis current commands based on a power command and a rotation speed of an induction motor by using a two-dimensional lookup table, by a current command section; outputting a mutual inductance Lm and a rotor torque Tr by using a one-dimensional lookup table based on the outputted d-axis current command, by the current command section; controlling a magnetic flux by using an input of the mutual inductance Lm and the rotor torque Tr from the current command section by a magnetic flux/current controller, calculating a slip of a rotor, and outputting d-axis and q-axis voltage commands corresponding to the d-axis and q-axis current commands from the current command section; receiving an input of the d-axis and q-axis voltage commands from the magnetic flux/current controller, modulating a pulse width, and outputting a gate driving voltage of a transistor; and outputting an AC voltage for driving the induction motor by using an output from a pulse width modulation/gate driver, by an inverter. <P>COPYRIGHT: (C)2012,JPO&INPIT |
