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US 7,443,127 B2Granted
Apparatus and method for motor control using table
AssigneeMitsubishi Heavy Industries, Ltd.
InventorsYoshimi Okazaki, Keisuke Okuda
Life of this patent
Estimating the term…
Abstract
In an apparatus of controlling a motor in a battery vehicle, a current command generation section has a table, and generates an exciting command current and a torque command current by referring to the table based on a torque command. A converting section generates 3-phase command voltages from the exciting command current and the torque command current. A motor driving section drives a motor in response to the 3-phase command voltages.
Claims15
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.
2 more elements
A method of controlling a motor in a battery vehicle, comprising:
- preparing a table that stores a relationship between a rotation frequency and an exciting command current and between the rotation frequency and a torque command current such that the motor generates torque with a minimum power consumption;
- referring to the table based on a torque command and a rotation frequency command to generate the exciting command current and the torque command current, 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;
- generating 3-phase command voltages from said exciting command current and said torque command current;
- and
- driving a motor in response to said 3-phase command voltages.
2 more elements
Dependencies are inferred from the claim text.