Patent ID: 8307929
Filing Date: 2012-11-13
Classification: B60K,B60L,B60W,H02K,H02M,H02P,Y02T

Abstract:
1. A drive control apparatus for rotating electric machines for driving and controlling a first rotating electric machine including a first rotor having a first permanent magnet and a second rotating electric machine having a structure different from said first rotating electric machine and including a second rotor having a second permanent magnet, comprising: a drive unit for driving said first and second rotating electric machines; and a control unit for estimating a temperature of said first permanent magnet and a temperature of said second permanent magnet, and for controlling said drive unit based on a result of the estimation, said control unit including a temperature estimation unit for selecting a first parameter indicating a temperature of a first element receiving heat from said first rotor and a second parameter indicating a temperature of a second element receiving heat from said second rotor, from among a plurality of parameters concerning states of said first and second rotating electric machines based on a difference in structure between said first and second rotating electric machines, and for estimating the temperature of said first permanent magnet and the temperature of said second permanent magnet using said first and second parameters, respectively, wherein a length in a rotation axis direction of said second rotating electric machine is longer than a length in a rotation axis direction of said first rotating electric machine, said first rotating electric machine further includes a first stator provided around said first rotor, said second rotating electric machine further includes a second stator provided around said second rotor, said first and second rotors and said first and second stators are cooled by a cooling medium, said first parameter is a temperature of said cooling medium, and said second parameter is a temperature of said second stator.