Patent ID: 7443127
Filing Date: 2008-10-28
Classification: B60L,Y02T

Abstract:
1. An apparatus of controlling a motor in a battery vehicle, comprising: a current command generation section having a table, and configured to generate an exciting command current and a torque command current by referring to said table based on a torque command and a rotation frequency, at least one of the exciting command current and the torque command current being obtained by interpolation or extrapolation that uses at least one of preceding and succeeding torque commands and preceding and succeeding rotation frequencies; a converting section configured to generate 3-phase command voltages from said exciting command current and said torque command current; and a motor driving section configured to drive a motor in response to said 3-phase command voltages, wherein the table stores such a relationship between the rotation frequency and the exciting command current and between the rotation frequency and the torque command current that the motor generates torque with a minimum power consumption.