Apparatus for compensating for speed error of motor
First Claim
1. An apparatus for controlling a speed of a motor of a compressor, comprising a means for dividing a rotational section corresponding to one complete revolution of a rotor of the motor into a plurality of preset rotational sections, determining a speed compensation value in each divided rotational section on the basis of a difference value between a reference speed and a previous estimated speed of the motor, and compensating for the speed error of the motor on the basis of the speed compensation value.
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Accused Products
Abstract
The present invention discloses an apparatus for compensating for a speed error of a motor which can reduce a speed ripple of the motor resulting from load characteristics, and which also can reduce vibrations and noises. The apparatus for compensating for the speed error of the motor divides a rotational section corresponding to one complete revolution of a rotor of the motor into a plurality of preset rotational sections, determines a speed compensation value in each divided rotational section on the basis of a difference value between a lo reference speed and a previous estimated speed, and compensates for the speed error of the motor on the basis of the speed compensation value.
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Citations
8 Claims
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1. An apparatus for controlling a speed of a motor of a compressor, comprising a means for dividing a rotational section corresponding to one complete revolution of a rotor of the motor into a plurality of preset rotational sections, determining a speed compensation value in each divided rotational section on the basis of a difference value between a reference speed and a previous estimated speed of the motor, and compensating for the speed error of the motor on the basis of the speed compensation value.
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2. An apparatus for compensating for a speed error of a motor, which divides a rotational section corresponding to one complete revolution of a rotor of the motor into a plurality of preset rotational sections, determines a speed compensation value in each divided rotational section on the basis of a difference value between a reference speed and a previous estimated speed, and compensates for the speed error of the motor on the basis of the speed compensation value.
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3. An apparatus for compensating for a speed error of a motor, comprising:
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a speed compensator for dividing a rotational section corresponding to one complete revolution of a rotor of the motor into a plurality of preset rotational sections, comparing a reference speed of the motor with a previous estimated speed in each divided rotational section, calculating the speed error of the motor according to the comparison result, determining a speed compensation value for compensating for the speed error, and outputting the speed compensation value;
a comparator for comparing the speed compensation value from the speed compensator, the reference speed and a current estimated speed of the motor; and
a proportional integration controller for outputting a reference torque component current for compensating for a speed error value according to the comparison result of the comparator. - View Dependent Claims (4, 5)
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6. An apparatus for compensating for a speed error of a motor, comprising:
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a speed compensator for comparing a reference speed of the motor with a previous estimated speed, calculating a previous speed error according to the comparison result, determining a speed compensation value for compensating for the previous speed error, and outputting the speed compensation value;
a first proportional integration controller for generating a reference current for compensating for a speed corresponding to the speed compensation value;
a first comparator for comparing the reference speed with a current estimated speed, and outputting a resulting speed error value;
a second proportional integration controller for outputting a reference torque component current for compensating for the speed error value of the first comparator;
a second comparator for comparing the reference torque component current, the reference current for compensating for the speed and a real torque component current, and outputting a resulting error value; and
a third proportional integration controller for outputting a reference torque component voltage for compensating for the error value of the second comparator. - View Dependent Claims (7, 8)
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Specification