KR-20260062265-A - Control system for circulating water pump with position sensor

Abstract

The present invention relates to a control system for a circulating water pump (CWP) including a position sensor. A control system for a circulating water pump (CWP) including a position sensor according to an embodiment of the present invention includes a position sensor for measuring the vane angle of the circulating water pump (CWP), a distributed control unit (DCS) for controlling one or more controllers, a logic control unit that receives a control signal generated by the distributed control unit and provides an actuator, and controls the vane of the circulating water pump (CWP) based on the control of the actuator, a signal processing unit that processes input/output signals generated from the position sensor, the distributed control unit, and the actuator and performs field bus communication, and a fuse unit for protecting a power supply unit and a controller. The system receives a vane angle signal of the circulating water pump from the position sensor, branches it into two signals, transmits them to the logic control unit and the distributed control unit, and compares the actual vane angle signal. If the angle is lower than a preset angle in the logic control unit, the vane angle control signal is output from the logic control unit in the open (forward) direction, and if the angle is higher than a preset angle, the vane angle control signal is output in the close (reverse) direction.

Inventors

• 이관규
• 이민재
• 박민수
• 오상훈
• 최정일

Assignees

• 주식회사 무하기술

Dates

Publication Date

20260507

Application Date

20241028

Claims (5)

1. A position sensor for measuring the vane angle of a circulating water pump (CWP); A distributed control unit (DCS) that controls one or more controllers; A logic control unit that receives a control signal generated by the above-mentioned distributed control unit and controls an actuator, and controls a vane of a circulating water pump (CWP) based on the control of the actuator; A signal processing unit that processes input/output signals generated from the above position sensor, distributed control unit, and actuator, and performs field bus communication; A fuse unit for protecting the power supply and controller; including, A control system for a circulating water pump (CWP) including a position sensor, which receives a blade angle signal of the circulating water pump from the position sensor, branches it into two signals, transmits them to the logic control unit and the distribution control unit, compares the actual blade angle signal, and outputs a blade angle control signal from the logic control unit in the open (forward) direction if the angle is lower than the angle preset by the logic control unit, and in the closed (reverse) direction if the angle is higher than the angle preset by the logic control unit.
2. In claim 1, The above position sensor is, A control system for a circulating water pump (CWP) including a position sensor, which measures the rotation angle of the position sensor by calculating the magnetoresistance effect, in which resistance changes according to changes in the magnetic force and magnetic field of the position sensor in conjunction with the signal processing unit.
3. In claim 1, A control system for a circulating water pump (CWP) including a position sensor, wherein the position sensor comprises: a magnetic part configured in a circular shape, divided into four parts, and having an internal hole formed at the internal center for mounting a mounting member including a shaft or a frame.
4. In claim 3, The above-mentioned magnetic part is connected to another magnetic part to connect the magnetic parts in order to adjust the diameter of the inner hole; and A guide member formed on the magnetic part, configured on the connecting part, and guiding the position when the magnetic part adjusts the diameter of the inner hole; comprising The above guide member has screw threads formed on its outer surface and fastens a magnetic fastening member to suppress movement between the connecting members, thereby fixing the size of the inner hole and the position of the four magnetic parts, and is a control system for a circulating water pump (CWP) including a position sensor.
5. In claim 3, A control system for a circulating water pump (CWP) including a position sensor, comprising: a position sensor having a connector formed on one side and connected to the logic control unit and the distribution control unit, respectively.

Description

Control system for circulating water pump with position sensor The present invention relates to a control system for a circulating water pump (CWP) including a position sensor. More specifically, the invention relates to a control system for a circulating water pump (CWP) including a position sensor for implementing the position sensor in a non-contact manner and measuring the rotation angle by calculating the magnetoresistance effect. The circulating water pump (CWP) controls the flow rate by adjusting the angle of the vane and is an important piece of equipment that directly affects the condenser vacuum and the cooling water system. Due to the use of contact sensors in the circulating water pump and its exposure to the outside air, cases of control failure occur due to moisture and lightning strikes depending on seasonal weather conditions (especially summer). The CWP vane angle positioner currently in use in the field requires a long time (over 2 hours) for calibration due to its physical contact method. Furthermore, it is difficult to achieve accurate adjustments through coordination with divers and physical offset adjustments; consequently, supply takes a long time, necessitating a stable supply. FIG. 1 is a block diagram showing the overall components of a control system of a circulating water pump (CWP) including a position sensor according to an embodiment of the present invention. FIG. 2 is a circuit diagram of a control system of a circulating water pump (CWP) including a position sensor according to an embodiment of the present invention. FIGS. 3 to 6 are schematic diagrams showing the components of a position sensor of a circulating water pump (CWP) including a position sensor according to an embodiment of the present invention. The unique aspects and specific technical features of the present invention will become more apparent from the following specific details and embodiments associated with the accompanying drawings. It should be noted that in assigning reference numerals to the components of each drawing in this specification, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, in describing an embodiment of the present invention, if it is determined that a detailed description of related known components or functions could obscure the essence of the invention, such detailed description is omitted. In addition, terms such as first, second, A, B, (a), (b), etc., may be used when describing the components of the present invention. These terms are intended merely to distinguish the components from other components, and the essence, order, or sequence of the components is not limited by such terms. Where it is stated that a component is "connected," "combined," or "connected" to another component, it should be understood that while the component may be directly connected or connected to the other component, another component may also be "connected," "combined," or "connected" between each component. Hereinafter, an embodiment of the present invention will be described in detail with reference to the attached drawings as follows. As illustrated in FIG. 1, a control system for a circulating water pump (CWP) including a position sensor according to an embodiment of the present invention may be configured to include a distributed control unit (10), a controller (20), and an actuator (40). The distributed control unit (10) performs the function of controlling one or more controllers and can be replaced by a distributed control system (DCS; Distributed Control System), which is a control system equipped with a computer for a process or factory with numerous control loops in which autonomous controllers are typically distributed in the system. The controller (20) receives a vane angle signal from the position sensor and outputs a vane angle control signal, and can perform the function of controlling the vane angle based on the output control signal. These circulating water pumps (CWPs) control the flow rate by adjusting the angle of the vanes and are important equipment that directly affects the condenser vacuum and the Cooling Water System. Below, the components of the controller (20) will be listed and explained in detail. As illustrated in FIGS. 1 and 2, the controller (20) may be configured to include a position sensor (30), a logic control unit (21), a signal processing unit (22), a fuse unit (25), and a power supply unit (26). The logic control unit (21) receives a control signal generated by the distribution control unit (10) and controls the actuator (40), and can perform the function of controlling the vane of the circulating water pump (CWP) based on the control of the actuator (40). The signal processing unit (22) performs the function of processing signals generated or transmitted by the distributed control unit (10), position sensor (30), and actuator (40) to transmit signals to the component to be transmi