Apparatus and method for controlling operation of reciprocating motor compressor
AssigneeLG Electronics Inc.
InventorsJae-Yoo Yoo, Min-Kyu Hwang, Chel Woong Lee
Life of this patent
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Abstract
An apparatus and method for operational control of a reciprocating motor compressor, includes performing an operation of the reciprocating motor compressor precisely and accurately. In addition, with the above apparatus and method, the phase difference between a first speed value of the motor (or first TDC value) and current applied to the motor is detected, the second speed value of the motor at the inflection point of the detected phase value (or second TDC value) is detected and stored as a reference value, and the speed of the motor is controlled on the basis of the reference value and the first speed value of the motor (or the first TDC value).
Claims22
An apparatus for controlling operation of a reciprocating motor compressor, comprising:
- a speed detecting unit for detecting a first speed value of a motor on the basis of a current and voltage applied to a motor;
- a phase value detecting unit for detecting a second speed value of the motor at the inflection point of the detected phase value;
- a speed reference value storage unit for setting the second speed value as a speed reference value and storing the set speed reference value;
- and
- a control unit for comparing the stored speed reference value and the first speed value detected from the speed detecting unit, outputting the corresponding comparison signal, and controlling the speed of the motor with the generated switching control signal according to the comparison signal.
A method for controlling operation of a reciprocating motor compressor, comprising the steps of:
- detecting a phase difference between a first speed value of a motor and a current applied to the motor;
- detecting a second speed value of the motor from an inflection point of the detected phase value and storing the detected speed value as a speed reference value;
- and
- controlling speed of the motor on the basis of the speed reference value and first speed value of the motor.
An apparatus for controlling operation of a reciprocating motor compressor, comprising:
- a TDC (Top Dead Center) detecting unit for detecting a first TDC value of a piston in a compressor;
- a phase value detecting unit for detecting a second TDC value of the motor at the inflection point of the detected phase value after detecting the phase difference between a voltage and current applied to the motor in the compressor;
- a TDC reference value storage unit for setting the second TDC value as a TDC reference value and storing the set TDC value;
- and
- a control unit for comparing the stored TDC reference value and the first TDC value, outputting the corresponding comparison signal, and controlling the TDC of the motor with the generated switching control signal according to the comparison signal.
A method for controlling operation of a reciprocating motor compressor, comprising the steps of:
- detecting a first TDC (Top Dead Center) value of a piston in the compressor;
- detecting a phase difference between a voltage and current applied to the motor in the compressor;
- detecting a second TDC value of the motor from an inflection point of the detected phase value and storing the detected TDC value as a TDC reference value;
- and
- comparing the TDC reference value and the first TDC value of the motor and controlling TDC of the motor on the basis of the comparison result.
Dependencies are inferred from the claim text.