Control system and method for controlling control valve of hydrodynamic system using actuator
A control system and fluid power technology, applied in control/regulation systems, flow control using electric devices, non-electric variable control, etc., can solve problems such as optimal control performance and energy efficiency of low fluid power systems
Pending Publication Date: 2021-08-20
DANFOSS AS
View PDF8 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Therefore, a pre-defined value of α is usually either left as the default (which is not always optimal) or it is not used at all, resulting in less than optimal control performance and energy efficiency of the fluid power system
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0037] figure 1 A schematic diagram of the fluid power system 10 is shown. The fluid power system 10 includes a heat exchanger 24 having a water inlet 18 , a water outlet 20 , an air inlet 26 , and an air outlet 28 . A control valve 16 controls flow in a water inlet 18 . The control valve 16 is actuated by the actuator 14 . Actuator 14 may be a digital actuator. Furthermore, the control valve 16 may be a pressure independent type control valve.
[0038]The control system 12 is configured to control the actuator 14 . The control system 12 includes a water inlet temperature sensor 30 , a water outlet temperature sensor 32 , an air inlet temperature sensor 34 , and an optional air outlet temperature sensor 36 .
[0039] The water inlet temperature sensor 30 is configured to determine the water temperature at the water inlet 18 by providing a water inlet temperature value indicative of the water temperature at the water inlet 18 . The water in the water inlet 18 can be therm...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a control system for controlling a control valve of a hydrodynamic system using an actuator, the hydrodynamic system comprising a heat exchanger having a water inlet, a water outlet, an air inlet and an air outlet, the control system comprises a water inlet temperature sensor configured to determine a water inlet temperature value, a water outlet temperature sensor configured to determine a water outlet temperature value, and an air inlet temperature sensor configured to determine an air inlet temperature value; wherein the control system is configured to: determine an alpha value of a characteristic of the hydrodynamic system based on the water inlet temperature value, the water outlet temperature value, and the air inlet temperature value; setting the reciprocal of the alpha value of the characteristic of the hydrodynamic system to the alpha value of the characteristic of the control valve combination actuator; and controlling the control valve with the actuator using the control valve in conjunction with the set alpha value of the characteristic of the actuator. Improved control systems and methods for controlling a control valve of a hydrodynamic system using an actuator to have optimal control performance and energy efficiency are provided.
Description
technical field [0001] The present invention relates to a control system and method for using an actuator to control a control valve of a fluid power system. Background technique [0002] Fluid flow in a fluid power system including a heat exchanger is controlled by a control valve. An actuator connected to the control valve opens and closes the control valve. These actuators are controlled by a control system. The amount of opening of the control valve defines a specific flow of fluid through the heat exchanger, eg where a linear heat transfer output characteristic (curve) exists. A heat exchanger exchanges a certain amount of thermal energy between a fluid and air. The relationship between the amount of fluid flow flowing through the heat exchanger and the energy transfer of the heat exchanger is determined by a characteristic (curve) of a combination of the heat transfer characteristics of the actuator, the actuated control valve and the heat transfer itself, for examp...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): F24D19/10G01K17/08G05D7/06
CPCF24D19/10G01K17/08G05D7/06G05D23/1931
Inventor 约翰·凯利伊兹托克·塞内卡马特加兹·欧索尼克
Owner DANFOSS AS