Drive control apparatus for rotating electric machines and vehicle
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsTetsuya Miura, Akira Takasaki
Life of this patent
Estimating the term…
Abstract
First and second motors have structures different from each other. A control device estimates a first magnet temperature of the first motor and a second magnet temperature of the second motor and controls a drive unit based on the first and second magnet temperatures. The control device estimates the first magnet temperature using a first parameter (the temperature of cooling oil of the first and second motors) and estimates the second magnet temperature using the temperature of the stator of the second motor. Since an appropriate parameter is selected from among a plurality of parameters concerning the state of the first and second motors, the first and second magnet temperatures can be estimated more accurately.
Claims12
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.
A vehicle, comprising:
- a first rotating electric machine including a first rotor having a first permanent magnet;
- 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;
- 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.
Dependencies are inferred from the claim text.