Simplified title:操作具可连续变化速度的多部螺旋式压缩器来提供噪音消除效果之系统与方法 SYSTEM AND METHOD OF OPERATION OF MULTIPLE SCREW COMPRESSORS WITH CONTINUOUSLY VARIABLE SPEED TO PROVIDE NOISE CANCELLATION
Abstract in simplified Chinese:一种用于消除或衰减彼此被邻近放置的与一加热或冷却系统一起使用的至少两正排量压缩器中的噪音的系统。一超前压缩器及一滞后压缩器具有一可控制的旋转速度及操作相位。一控制器选择性地控制每一压缩器的旋转速度及操作相位。该控制器将该等压缩器的旋转速度控制在实质上对于每一压缩器而言都相等的速度上,对每一压缩器使用一锁相回路及一比较器电路。该控制器控制该等压缩器的操作相位,借此该超前压缩器及该滞后压缩器之压力脉冲在连续输出压力脉冲之间被分隔以有效地使进行噪音衰减的组合脉动频率加倍。
Abstract in simplified Chinese:一种适用于空调系统之恒温变频模块,该空调系统具有一交流压缩机,该恒温变频模块包含一控制单元、一切换单元,及一变频单元;该控制单元包括一处理器,该变频单元与该交流压缩机电连接,该切换单元包括多数个开关器;借由该处理器启闭所述开关器,来改变该变频单元所提供该交流压缩机之电源的频率,进而控制该交流压缩机的运转速度,借此来调节该室内温度到达恒温的状态,其不仅可降低该交流压缩机之转速骤升或骤降所产生的噪音困扰,更可使该交流压缩机更有效率地运转以达到节能省电的功效。
Abstract:
Systems and methods for electronic pressure control of pumps in a dual pump system. The system may include a controller, a primary pump operated by the controller to maintain a system pressure in a flow path at a first pressure setpoint; a pressure transducer reading the system pressure and providing the system pressure to the controller; and a secondary pump operated by the controller to maintain the system pressure at a second pressure setpoint, the second pressure setpoint being less that the first pressure setpoint.
Abstract:
A method controls the start-up of an oil pump of a gearbox by a brushless electric motor that has no position sensor. The stator coils are powered from the off mode in a constant-current open-loop control sequence until the pump reaches a speed threshold at which speed regulation switches over to closed-loop control on a setpoint corresponding to the lubrication flow rate required to ensure the reliability of the gearbox, but without in so doing exceeding a current threshold indicative of pump seizure, at which point motor control switches back over to the constant-current open-loop control sequence. The open-loop current setpoint is higher than the threshold for switching over to closed-loop control so that in the open-loop control mode the motor torque available at the pump is higher than in the closed-loop control mode.
Abstract:
An exhaust system (2) is used for evacuating a chamber of a manufacturing apparatus (1) for manufacturing semiconductor devices, liquid crystal panels, LEDs, or solar cells. The exhaust system (2) includes a vacuum pump apparatus (3) for evacuating the chamber, an exhaust gas treatment apparatus (5) for treating an exhaust gas discharged from the chamber, and a controller (6) for controlling the vacuum pump apparatus (3) and/or the exhaust gas treatment apparatus (5). Information of operation process of the manufacturing apparatus (1), and the kind of gas and the flow rate of the gas supplied to the manufacturing apparatus (1) is inputted into the controller (6) to control the vacuum pump apparatus (3) and/or the exhaust gas treatment apparatus (5).
Abstract:
A pumping control unit is disclosed herein. The pumping control unit includes a processor coupled to a memory and a communication interface. The memory is configured to store an invariant matrix. The communication interface is configured to receive a plurality of measurements of a time-varying parameter for a rod pumping unit. The plurality of measurements is taken at a surface of a pumping site over a pump cycle for a sucker rod string. The processor is configured to gain access to the invariant matrix in the memory and the plurality of measurements from the communication interface. The processor is further configured to compute a Fourier coefficient array based on the invariant matrix and the plurality of measurements. The processor is further configured to compute a time-varying downhole parameter based on the Fourier coefficient array and a sucker rod string model.
Abstract:
A method for controlling an electrical drive of an electrically driven air compressor of a motor vehicle and a corresponding control circuit. A prevailing load torque of the air compressor that is applied at a drive shaft of the compressed air compressor is estimated as a function of at least one operating parameter and is fed forward as an estimated disturbance variable to the control circuit of the electrical drive to reduce a control error produced as a result of the prevailing load torque.