US 7,405,534 B2 · Apparatus and method for controlling velocity of motor

Abstract

An apparatus controlling a velocity of a motor having a rotor, includes a sensing velocity calculator sensing a rotation velocity of the motor, and calculating a sensing velocity on the basis of the sensed rotation velocity of the motor; a velocity estimator estimating an estimation velocity of the motor based on an information about a position error of the rotor; and a reference velocity calculator dividing an overall velocity period of the motor into a plurality of unit velocity periods based on a command velocity for controlling the rotation velocity of the motor, calculating a sum of the sensing velocity, the estimation velocity, and the command velocity after multiplying at least one of the sensing velocity, the estimation velocity, and the command velocity by a predetermined weight, and outputting the sum as a reference estimation velocity of the motor.

Claims20

Dependent claims

An apparatus controlling a velocity of a motor having a rotor, the apparatus comprising:

a sensing velocity calculator which senses a rotation position of the motor, and calculates a sensing velocity on the basis of the sensed rotation position of the motor;
a velocity estimator which estimates an estimation velocity of the motor based on information about a position error of the rotor;
and
a reference velocity calculator which divides an overall velocity period of the motor into a plurality of unit velocity periods based on a command velocity for controlling a rotation velocity of the motor, calculates a sum of the sensing velocity, the estimation velocity, and the command velocity after multiplying at least one of the sensing velocity, the estimation velocity, and the command velocity by a predetermined weight, and outputs the sum as a reference estimation velocity of the motor.

1 more element

A method for controlling a velocity of a motor having a rotor, the method comprising:

calculating a sensing velocity based on sensing a rotation position of the motor;
estimating an estimation velocity of the motor on the basis of information about a position error of the rotor;
generating a command velocity for controlling a rotation velocity of the motor;
dividing an overall velocity period of the motor into a plurality of unit velocity periods on the basis of the command velocity;
and
calculating a reference estimation velocity by summing the sensing velocity, the estimation velocity, and the command velocity after multiplying at least one of the sensing velocity, the estimation velocity, and the command velocity by a predetermined weight in a unit velocity period.

3 more elements

Dependencies are inferred from the claim text.

Apparatus and method for controlling velocity of motor

Life of this patent

Apparatus and method for controlling velocity of motor

Life of this patent

Abstract

Claims20