The frequency conversion control cabinet adopts PLC programmable controller, carries out man-machine interface to the pump set and other equipments, supplements the computer technology to carry on the intelligent control, carries on the automatic air pavilion to the electrical machinery, the water pump and the related equipment, may carry on the fire pump regular automatic inspection, To solve the problem of the death of the fire pump, frequency conversion pumps, water hammer elimination, alarm and fire control center joint control and many other functions. The following small series introduces the working principle of the frequency conversion control cabinet and the characteristics of the frequency conversion control cabinet.
Frequency conversion control cabinet working principle
The key device of the inverter control cabinet is the inverter. The rotation speed of the motor mainly depends on the power supply frequency. In addition to the asynchronous motor has a small slip ratio, the rotation speed is basically proportional to the power supply frequency, and the synchronous motor rotation speed is strictly equal to the power supply frequency. Proportional. By adjusting the output frequency of the inverter, the speed of the motor can be changed.
The frequency conversion control cabinet is mainly used to adjust the operating frequency of the equipment, reduce the energy loss, and can smoothly start the equipment and reduce the damage to the motor caused by the large current generated when the equipment is directly started. At the same time comes with analog input (speed control or feedback signal), PID control, pump switching control (for constant pressure), communication functions, macro functions (for different occasions have different parameter settings), multi-speed, etc. . Can be widely used in industrial and agricultural production and various types of construction water supply, drainage, fire control, spray pipe network pressurization and HVAC hot and cold water circulation and other occasions of automatic control.
Frequency Control Cabinet Features
1. Select international famous brand inverters, programmable controllers and famous brand low-voltage electrical appliances;
2, digital PID adjustment, keyboard operation, digital display, automatic operation unattended;
3, the circuit design is concise and clear, clear thinking, easy to fault analysis, maintenance;
4, frequency adjustment, effectively avoiding the "water hammer" phenomenon.
5, the frequency changer and the controller programming and the establishment are convenient and simple, easy to grasp.
6, excellent performance, flexible control methods, strong anti-interference ability, stable and reliable work;
7, the pipe network pressure is constant without impact, automatic / manual switching control;
8. The communication serial port can be connected with the computer to realize the direct control of the computer network.
9, the water supply pressure is stable, the system achieves closed-loop control, can automatically adjust the system pressure and set the pressure difference, so that the system pressure remains constant.
10. In the automatic state, the pump motor realizes soft start. Has no impact on the power grid and pipe network, greatly prolonging the service life of pumps, motors, piping systems, and electrical control systems;
11. Manual and automatic control function settings can ensure the safe and continuous operation of the equipment;
12, control program, according to the user's requirements to achieve a variety of control methods. Such as: time switch system, fire linkage, no flow and zero flow automatic shutdown sleep, upper computer centralized management;
13, multiple pumps can be cycled alternately, to equalize the average working time of each pump to extend the service life of the pump, so as to avoid the long-term non-operation of the standby pump and rust, to ensure that the pump can run smoothly when the fire occurs;
14, the basic control features powerful, optional additional features. Such as: time switch system, automatic pump for soft work. Small-flow and zero-flow automatic shutdown with water, sleep, remote control, local control cabinet.
15. Perfect protection functions, such as short circuit, over-current, over-voltage, overheating, overload, etc. If the pump operation fails, it will automatically stop working and alarm output; the system has self-test, fault judgment, fault memory, fault display , Automatic start standby pump and other functions.
16. Adopt PLC programmable controller to perform man-machine interface for pump set and other equipments, supplemented by computer technology for intelligent control.
Frequency control cabinet control type
1. Liquid level control: The control cabinet is equipped with high-performance Key float switch. According to the high and low changes of the liquid level, the water supply and discharge pump can be automatically controlled to start and stop.
2, pressure control: external contact pressure gauge or pressure controller, according to the pipe network pressure changes automatically open the pump, turn off the pump, this type is widely used in living water supply and fire booster system.
3, temperature control: external temperature controller, according to the set temperature range to open or close the pump, used in constant temperature, heat exchange systems, etc. need to control the temperature of the occasion.
4. Time control: The chassis panel is equipped with a time setting button and a display. The user can control the opening and closing of the water pump according to the timing, and is suitable for the control of various regular or regular intermittent operation modes.
Editing summary: The working principle of the frequency conversion control cabinet and the characteristics of the frequency conversion control cabinet are introduced here, and we hope to help everyone. If you want to know more related information, you can pay attention to this website information.
Product siphon principle Refrigeration principle Frequency control cabinet working principle
Alloy steel refers to steel with high strength and good chemical stability at high temperature. It includes two types of anti oxidation steel (or high temperature resistant steel) and hot steel. Anti oxidation steel generally requires good chemical stability, but the capability is limited. High temperature strength and the corresponding oxidation resistance of heat and strong steel are required. Heat-Resistance Steel is often used in the manufacture of boiler, steam turbine, power machinery, industrial furnace and aviation, petrochemical and other industrial sectors in the work of the high temperature parts. In addition to the requirements of high temperature strength and high temperature oxidation corrosion, sufficient toughness, good shaping and welding are also required according to the different use, as well as a certain organizational stability. In addition, some new low chromium nickel oxidation are also developed .
Heat-Resistance Steel
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