Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
  • F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
  • F04B35/045—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric using solenoids

Definitions

• the present invention relates a driving controlling apparatus of a reciprocating compressor using resonance, and more particularly, to a driving controlling apparatus of a reciprocating compressor using resonance with high current counteracting characteristics by offsetting an inductance value of a coil wound inside a motor by employing a capacitor.
• the rotor can be stopped at a certain position, and by controlling a phase of an input pulse signal applied to the switching device by taking a maximum inductance as a starting point, a reverse-rotational force can be generated
• the reciprocating compressor is adopted for use to electric products requiring a direction control of the motor.
• a compression ratio can be varied by a voltage applied to the motor, and accordingly, a cooling force can be varied according to a user's intention.
• Figure 1 is a block diagram showing the construction of a driving controlling apparatus of a general reciprocating compressor.
• the general reciprocating compressor includes: a reciprocating compressing unit (L.CO P) for varying a stroke by piston's movement to control a cooling force by a voltage applied to an internal motor according to a stroke command value; a voltage detector 30 for detecting a voltage generated at the reciprocating compressing unit (L.COMP) as the stroke is increased by the applied voltage; a current detector 20 for detecting a current applied to the reciprocating compressing unit (L.COMP) as the stroke is increased by the applied voltage; a microcomputer 40 for calculating a stroke with the voltage and the current detected by the voltage detector 30 and the current detector 20, comparing the stroke with the stroke command value and outputting a corresponding switching control signal; and an electric circuit unit 10 for switching off an AC power with a t ⁇ ' ac according to the switching control signal of the microcomputer 40 to apply a voltage to the reciprocating compressing unit (L.COMP).
• a reciprocating compressing unit L.CO P
• a voltage detector 30 for detecting a voltage generated at the reciproc
• the piston is moved by the voltage applied according to the stroke command value set by a user, and accordingly, a stroke is varied to control a cooling force.
• the microcomputer 40 calculates a stroke by using the voltage and current detected by the voltage detector 30 and the current detector 20.
• the stroke is compared with the stroke command value to output a corresponding switching control signal.
• the microcomputer 40 outputs a switching control signal for lengthening the ON period of the triac (Tr1) in order to increase the voltage applied to the reciprocating compressing unit (L.COMP).
• the microcomputer 40 If, however, the calculated stroke is greater than the stroke command value, the microcomputer 40 outputs a switching control signal for shortening
• V L — + R 'i + a - S (1 ) dt
• ⁇ indicates a motor constant for converting an electric force to a
• S indicates a stroke
• 'R' is a internal resistance of the motor
• 'L' indicates an inductance of the motor (M) itself.
• the inductance voltage (L — ) is almost similar to a back electromotive dt
• the voltage (V) applied to the motor (M) is determined by
• the motor should be increased.
• the inductance (L) value of the coil wound on the motor (M) itself should be small, and the inductance (L) value of the coil becomes small as the size of the motor (magnet) is increased.
• the size of the mover the thickness of the magnet
• an air gap is increased, causing a problem that the overall size and cost of the reciprocating compressor is increased.
• the size of the mover (the thickness of the magnet) is reduced, the inductance (L) value of the coil wound at the motor (M) is increased. Then, the current according to the voltage value for the stroke control of the reciprocating compressor would slowly work, so that the stroke is not smoothly controlled.
• an object of the present invention is to provide a driving controlling apparatus of a reciprocating compressor which has an excellent current counteracting capacity by offsetting a quality which slows current operation characteristics as an inductance value of a coil wound inside a motor is increased by employing a capacitor.
• a driving controlling apparatus of a reciprocating compressor having a reciprocating compressing unit controlling a cooling force by varying a stroke according to a piston's movement by a voltage applied to an internal motor according to a stroke command value and an electric circuit unit for switching an AC power with a triac and applying it to the motor of the reciprocating compressing unit, wherein the electric circuit unit includes a capacitor for offsetting an inductance of a coil wound at a motor itself of the reciprocating compressing unit.
• Figure 1 is a block diagram showing the construction of a driving controlling apparatus of a conventional reciprocating compressor.
• Figure 2 is a block diagram showing the construction of a driving controlling apparatus of a reciprocating compressor using a resonance according to the present invnetion.
• Figure 2 is a block diagram showing the construction of a driving controlling apparatus of a reciprocating compressor using a resonance according to the present invnetion.
• a driving controlling apparatus of a reciprocating compressor includes: a reciprocating compressing unit (L.COMP) for varying a stroke by piston's movement to control a cooling force by a voltage applied to an internal motor according to a stroke command value; a voltage detector 30 for detecting a voltage generated at the reciprocating compressing unit (L.COMP) as the stroke is increased by the applied voltage; a current detector 20 for detecting a current applied to the reciprocating compressing unit (L.COMP) as the stroke is increased by the applied voltage; a microcomputer
• an electric circuit unit 10 having a capacitor (C) to offset an inductance of a coil (L) wound at the motor (M) itself of the reciprocating compressing unit (L.COMP) and switching off an AC power with a triac according to the switching control signal of the microcomputer 40 to apply a voltage to the reciprocating compressing unit (L.COMP).
• the piston is moved by an applied voltage according to a stroke command value set by a user, and accordingly, a stroke is varied to control a cooling force.
• the microcomputer 40 calculates a stroke by using the voltage
• the stroke is compared with the stroke command value to output a corresponding switching control signal.
• the capacitor (C) is connected in series to the motor (M) to offset an inductance (L) of a coil wound at the motor (M), which will now be described in detail.
• a capacitance can be set by the following equation (3):
• the capacitance (C) and the inductance (L) are previously set with values causing a resonance.
• V R - i + a - S (4)

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Control Of Positive-Displacement Pumps (AREA)
• Control Of Ac Motors In General (AREA)
• Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
• Compressor (AREA)
• Reciprocating, Oscillating Or Vibrating Motors (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=19707404

Family Applications (1)

Country Status (9)

Cited By (2)

Families Citing this family (14)

Citations (3)

Family Cites Families (12)

• 2001
  • 2001-03-26 KR KR10-2001-0015634A patent/KR100396774B1/ko active IP Right Grant
  • 2001-05-24 CN CN01810073A patent/CN1430702A/zh active Pending
  • 2001-05-24 JP JP2002575472A patent/JP3917526B2/ja not_active Expired - Fee Related
  • 2001-05-24 BR BR0111190-6A patent/BR0111190A/pt not_active Application Discontinuation
  • 2001-05-24 DE DE60108427T patent/DE60108427T2/de not_active Expired - Lifetime
  • 2001-05-24 US US10/276,913 patent/US20030143080A1/en not_active Abandoned
  • 2001-05-24 EP EP01934583A patent/EP1373728B1/de not_active Expired - Lifetime
  • 2001-05-24 WO PCT/KR2001/000867 patent/WO2002077453A1/en active IP Right Grant
  • 2001-05-24 AT AT01934583T patent/ATE287043T1/de not_active IP Right Cessation

Patent Citations (3)

Non-Patent Citations (1)

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