Abstract:
An apparatus and method for controlling a linear compressor is provided. The linear compressor controlling apparatus includes a voltage detection unit, a current detection unit, a control unit and a compressor drive unit. The voltage detection unit detects a voltage supplied to the linear compressor, while the current detection unit detects a current supplied to the linear compressor. The control unit determines whether a collision of a piston of the compressor with a valve of the compressor occurs using output signals of the voltage and current detection units, and controls the amplitude of the piston if the collision of the piston with the valve occurs. The compressor drive unit controls the amplitude of the piston under the control of the control unit.
Abstract:
본 발명에 관한 선형 컴프레서 구동 장치(101)는, 선형 컴프레서(100)에 소정의 주파수의 구동 전류를 공급하는 인버터(2)를 구비한 선형 컴프레서 구동 장치에 있어서, 공진 주파수 정보에 근거해서, 상기 인버터(2)를 그 출력 전류의 주파수가 공진 주파수로 되도록 제어하는 인버터 제어기(6)를 구비하되, 인버터(2)의 출력 전류 Id의 변화량이 0으로 되는 위상 타이밍에서, 인버터(2)의 출력 전류 Id 및 출력 전압 Vd의 순시값을 측정하여, 이들의 측정값으로부터 피스톤 스트로크를 산출하도록 한 것이다. 이러한 선형 컴프레서 구동 장치(101)에서는, 위치 센서를 이용하지 않고서, 간단한 연산 처리에 의해, 선형 컴프레서의 피스톤의 스트로크와 탑 클리어런스를 정밀도 좋게 검지할 수 있게 된다.
Abstract:
PURPOSE: An apparatus and method is provided to achieve an improved efficiency and reliability by controlling piston position in such a manner that the top clearance is minimized. CONSTITUTION: An apparatus comprises a power unit(10) for supplying AC 220V; a triac(20) for switching AC 220V supplied from the power unit; a current phase detection unit(30) for sensing the current switched by the triac, integrating the current and generating a first square wave corresponding to the integrated current; a motor(40) driven by AC 220V switched by the triac so as to allow the piston in the cylinder to perform reciprocal movement; a stroke phase detection unit(50) for generating AC voltage waveform having a constant frequency and variable amplitude in accordance with the piston position, and generating a second square wave corresponding to the AC voltage waveform; a zero crossing detection unit(60) for detecting zero crossing of AC 220V supplied from the power unit; a control unit(70) for outputting a signal for controlling piston position in accordance with the phase difference between the first square wave generated from the current phase detection unit and the second square wave generated from the stroke phase detection unit; and a phase control unit(80) for controlling firing angle for adjusting stroke in accordance with the control signal output from the control unit.
Abstract:
Die Erfindung betrifft eine Beschichtungsmittelpumpe (1) zur Förderung eines Beschichtungsmittels in einer Beschichtunganlage, insbesondere zum Fördern von Lack in einer Lackieranlage, miteinem elektrischen Antriebsmotor (3) zum Antrieb der Beschichtungsmittelpumpe (1), so dass die Beschichtungsmittelpumpe (1) ihre Pumpenstellung im Betrieb kontinuierlich ändert. Die Erfindung sieht ein Wegmesssystem (5) vor zum quantitativen Erfassen der Pumpenstellung der Beschichtungsmittelpumpe (1).
Abstract:
A pump with a position indicator is disclosed. The pump includes a pump housing, wherein the pump housing includes a flexible bladder disposed therein; a first fluid zone, wherein the first fluid zone is operable to allow flow of a first fluid into and out of the first fluid zone; and a second fluid zone, wherein the second fluid zone is operable to allow flow of a second fluid into and out of the second fluid zone. The pump further includes a flexible position indicator disposed in the first fluid zone and in communication with the flexible bladder, wherein the flexible position indicator is operable to detect a linear position of the flexible bladder, and wherein the flexible bladder fluidly isolates the first fluid zone from the second fluid zone.
Abstract:
An oil well installation (15) comprising tubing (17) arranged in a well (18), a pump (19) and actuator (20) disposed in the well, a surface controller (50) connected with the linear actuator, multiple downhole sensors (30-35) configured to sense operating parameters of the linear actuator and/or the pump, a downhole signal processor (40) configured to receive sensor data from the sensors and to output serial data, a communication cable (23) between the sensor processor and the surface controller, the communication cable having at least two paired transmission lines (25, 26), a downhole differential signal driver (41) configured to receive the serial data and to output data signals to the paired transmission lines, and a surface receiver (27) connected to the communication cable and configured to receive the signals from the differential signal driver via the paired transmission lines.
Abstract:
Embodiments of the present disclosure describe a liquid delivery system 100 that includes a cylinder 114, a piston 214 within the cylinder 100, a rod 208 connected to the piston 214, and a limit sensor system having a magnet 224 connected to the rod 208, outside the cylinder 100. The magnet 224 can have a first position corresponding to the piston 214 located at a first stroke limit position and a second position corresponding to the piston 214 located at a second stroke limit position. Furthermore, the limit sensor system can have reed switches located outside the cylinder 114 and configured to actuate when the magnet 224 is at the first position and the second position.
Abstract:
The present invention discloses a method capable of detecting the occurrence of impact or collision between a cylinder (2) and piston (1) driven by a linear motor of a gas compressor. Said method comprises the steps of: i) obtainment of a reference signal (Sr) associated to an electrical output of the linear motor before the piston attains the upper dead center; ii) obtainment of a detection signal (Sd) associated to said electrical output of the linear motor after the piston attains the upper dead center; iii) comparison between the reference signal (Sr) and the detection signal (Sd); and iv) record of occurrence of impact when the result of comparison of step iii indicates that the detection signal (Sd) presents a variation deriving from impact between the cylinder (2) and the piston (1), considering a pre-established tolerance. The present invention also discloses an electronic detector device capable of executing the methodology described above. The present invention also discloses a gas compressor (100) and a control system that comprises the above-mentioned detector.
Abstract:
The present invention discloses a method capable of detecting the occurrence of impact or collision between a cylinder (2) and piston (1) driven by a linear motor of a gas compressor. Said method comprises the steps of: i) obtainment of a reference signal (Sr) associated to an electrical output of the linear motor before the piston attains the upper dead center; ii) obtainment of a detection signal (Sd) associated to said electrical output of the linear motor after the piston attains the upper dead center; iii) comparison between the reference signal (Sr) and the detection signal (Sd); and iv) record of occurrence of impact when the result of comparison of step iii indicates that the detection signal (Sd) presents a variation deriving from impact between the cylinder (2) and the piston (1), considering a pre-established tolerance. The present invention also discloses an electronic detector device capable of executing the methodology described above. The present invention also discloses a gas compressor (100) and a control system that comprises the above-mentioned detector.