Abstract:
A method and system for pumping unit with an elastic rod system is applied to maximize fluid production. The maximum stroke of the pump and the shortest cycle time are calculated based on all static and dynamic properties of downhole and surface components without a limitation to angular speed of the prime mover. Limitations of structural and fatigue strength are incorporated into the optimization calculation to ensure safe operation while maximizing pumped volume and minimizing energy consumption. Calculated optimal prime mover speed is applied to the sucker rod pump by means of beam pumping, long stroke or hydraulic pumping unit by controlling velocity, acceleration and torque of the electric prime mover or by controlling pressure and flow rate in hydraulically actuated sucker rod pumping system.
Abstract:
A motor speed controller (100) identifies the position of a pump rod (14). At one or more critical positions of the rod, the motor speed controller (100) adjusts the speed of the motor to change the movement of the pump rod (14). The critical positions and the rate of change of speed at each critical position can be user-specified.
Abstract:
A linear compressor drive device (101) comprising an inverter (2) for supplying a drive current of a specified frequency to a linear compressor (100), wherein an inverter controller (6) is provided to control the inverter (2) so that the frequency of an output current therefrom is a resonance frequency based on resonance frequency information and to measure the instantaneous values of the output current Id and output voltage Vd of the inverter (2) at a phase timing that renders zero a change in the output current Id of the inverter (2) to thereby calculate a piston stroke from the measured values. Such a linear compressor drive device (101) can detect accurately the piston stroke and top clearance of a linear compressor by a simple processing without using a position sensor.
Abstract:
A method and system for pumping unit with an elastic rod system is applied to maximize fluid production. The maximum stroke of the pump and the shortest cycle time are calculated based on all static and dynamic properties of downhole and surface components without a limitation to angular speed of the prime mover. Limitations of structural and fatigue strength are incorporated into the optimization calculation to ensure safe operation while maximizing pumped volume and minimizing energy consumption. Calculated optimal prime mover speed is applied to the sucker rod pump by means of beam pumping, long stroke or hydraulic pumping unit by controlling velocity, acceleration and torque of the electric prime mover or by controlling pressure and flow rate in hydraulically actuated sucker rod pumping system.
Abstract:
A pumpjack speed control system includes a user interface, a controller and a variable speed drive. The user interface includes a mathematical representation of the pumpjack geometry which permits the conversion of rod speed profiles to crank speed profiles.
Abstract:
The invention relates to an oscillating armature diaphragm pump comprising a coil (7) that drives the oscillating armature (8) and comprising a control device (10) that periodically applies a drive voltage to the coil (7). In order to measure the flow rate between two successive applications of the drive voltage to the coil (7) during the time, during which no drive is effected, the voltage existing on the coil (7) is detected and a flow rate measurement signal (12) is generated therefrom.
Abstract:
본 발명은 공진 선형 압축기(100)의 피스톤을 위한 시스템 및 제어 방법에 관한 것으로, 특히 그 최대 효율에서 동작하기 위해 설계되고, 기계적 크기 또는 변수를 측정하기 위한 센서를 이용하는 것 없이 상기 압축기를 작동시킬 수 있는 시스템에 관한 것이다. 본 발명은 더욱이 공진 선형 압축기의 피스톤을 제어하는 방법에 관한 것으로, 효율적으로 압축기 모터를 제어하기 위해 상기 피스톤의 속도 및 변위를 평가할 수 있는 단계에 관한 것이다. 더욱이, 본 발명은 현재 청구된 목적에서 제안된 바와 같은 제어 시스템이 제공되는 공진 선형 압축기(100)에 관한 것이다.
Abstract:
An apparatus for detecting shaking of stroke of a linear compressor and a method are provided. A linear compressor mis-operates due to change in an external voltage or noise because the shaking of the stroke is detected by the amounts of change in the stroke or current. In order to solve the above problem, a control apparatus of a compressor includes a stroke/current phase difference calculator for calculating the phase differences of the stroke and current using the stroke and the current, which are determined by the increase and the reduction of the stroke due to the voltage generated by a linear compressor, a phase difference change amount calculator for calculating phase difference change amounts using the calculated phase differences of the stroke and the current, a shaking detector for comparing the calculated phase difference change amounts with a reference value for determining whether the shaking of the stroke is detected, to thus determine the shaking of the stroke, and a stroke controller for receiving a stroke shaking detection signal from the stroke shaking detector and changing the stroke voltage according to the magnitude of the request of cooling capacity, which is determined by the change in load, to thus control the driving of the linear compressor, during the operation of the linear compressor.