US 7,504,797 B2 · Motor control device

Abstract

A motor control device includes an estimator for estimating a rotor position of a motor having a salient pole by using a value corresponding to a q-axis inductance of the motor as an operation parameter where an estimated axes for the control corresponding to d-q axes are γ-δ axes, and a controller for controlling the motor based on the estimated rotor position. The estimator generates a deviation between a d-axis and a γ-axis by performing the estimation of the rotor position based on a value between a real q-axis inductance and a real d-axis inductance of the motor adopted as the operation parameter. The controller controls the motor so that a γ-axis component of a motor current supplied to the motor is maintained to be a predetermined value of zero or close to zero regardless of a value of a δ-axis component of the motor current.

Claims16

Dependent claims

A motor control device comprising:

an estimator for estimating a rotor position of a motor having a salient pole by using a value corresponding to a q-axis inductance of the motor as an operation parameter;
and
a controller for controlling the motor based on the estimated rotor position, wherein
the estimator generates a deviation between a d-axis and a γ-axis by performing the estimation of the rotor position based on a value between a real q-axis inductance and a real d-axis inductance of the motor adopted as the operation parameter, where
the d-axis is an axis parallel to a magnetic flux generated by a permanent magnet that constitutes the rotor, the γ-axis is an estimated axis for the control corresponding to the d-axis, and the q-axis is an axis leading the d-axis by 90 degrees in electrical angle.

2 more elements

Dependencies are inferred from the claim text.

Motor control device

Life of this patent

Motor control device

Life of this patent

Abstract

Claims16