ABB DSRF197K01 new off-the-shelf DCS control system power module
Brand ABB color standard Application Industrial height 215mm rated current 470mA
Protection level IP45 Suitable for motor power 256KW Applicable Site Power Industry BOM Number GJR2391500R1220 Power industry HIEE401782R0001 Part Number DSRF197K01
Applicable pipe 2 Whether imported is weighing 4.88 kg can be sold nationwide
ABB DSRF197K01 new off-the-shelf DCS control system power module
1: open loop control system
Open-loop control system block diagram
Open-loop control description: that is, there is no opposite effect between the output end and the input end of the system, which is called no feedback loop in the automatic control discipline, so this system is called open-loop control system.
2: Manual control
In order to maintain normal working conditions during the operation of industrial production processes or production equipment. It is often necessary to control some physical quantities (such as temperature, pressure, flow, liquid level, voltage, displacement, speed, etc.) to maintain them near a certain value as far as possible, or to make them change according to certain laws. To meet this need, it is necessary to conduct timely operation and control of production machinery or equipment to offset external disturbances and influences. This operation and control can be completed by manual operation, and can be completed by the operation of automatic devices, the former is called manual control or manual control, and the latter is called automatic control.
The process of manual control is: measurement → deviation → control → re-measurement → re-deviation → re-control such a continuous cycle process. The purpose of the control is to minimize the deviation and keep the controlled quantity near the expected value as much as possible.
3, closed loop control system
The basic components of closed-loop feedback control system are as follows:
(1) Given components: Give the amount of input corresponding to the expected output.
(2) Comparison components: to find the deviation between the input and the feedback amount, often using integrated operational amplifiers (referred to as integrated operational amplifiers) to achieve.
(3) Amplification components: Because the deviation signal is generally small, not enough to drive the load, it is necessary to amplify components, including voltage amplification and power amplification.
(4) Executive elements: directly drive the controlled object, so that the output changes. Commonly used motors, regulating valves, hydraulic motors and so on.
(5) Measuring elements: detect the controlled quantity and convert it into the required electrical signal. In the control system, the tachometer generator and photoelectric coding disk are commonly used for speed detection. Rotary transformers, automatic machines, etc. for position and Angle detection; Transformers for current detection and thermocouples for temperature detection, etc. These detection devices generally convert the detected physical quantity into the corresponding continuous or discrete voltage or current signal.
(6) Correction element: also known as compensation element, is a component whose structure and parameters are easy to adjust, connected in the system in series or feedback, to complete the required operational functions to improve the performance of the system. According to the different position in the system, it can be called series correction element and feedback correction element respectively.
ABB DSRF197K01 new off-the-shelf DCS control system power module
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