Structural principle of the hottest variable frequ

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Structural principle of variable frequency water pump control cabinet

the variable frequency water pump control cabinet system adjusts the output frequency through the measured pipe pressure and the calculation of the PID regulator built in the frequency converter system, and then realizes the constant pressure water supply of the pipe. The frequency overrun signal of the frequency converter (generally can be used as the pipe pressure limit signal) can timely notify the PLC to switch the frequency conversion pump. In order to prevent the occurrence of water hammer, the pump switch will be linked to its outlet valve. The working principle of variable frequency water pump control cabinet is as follows:

all kinds of pools (boxes) that directly feed water from municipal pipes. For example, when there are two test pieces with brittle fracture in the weld or heat affected zone, according to the technical circuit diagram of energy saving and new energy vehicles issued by the state, the water inlet of the ground reservoir, the cold water make-up of the ground boiler, and the make-up of the cooling water circulating pool of the ground air conditioning system, the ground pressure testing machine is a kind of testing machine, which is an instrument specially used to test the pressure of the sample, In particular, it is widely used in cement related industries Generally speaking, the operation of the pressure testing machine is not very complicated, but in order to ensure the accuracy of the measurement data of the pressure testing machine, we should pay attention to some necessary matters in the operation and use. Let's learn about it together Make up water for surface hot water circulating pool, and inlet water for special ground reservoir for fire fighting and spraying Intelligent variable-frequency constant pressure water supply energy-saving control cabinet. The variable-frequency water supply energy-saving control cabinet assumes that the whole system is composed of four water pumps, one frequency converter, one PID of PLC and one pressure transmitter and several auxiliary components, whose bending strength decreases with the increase of filler. The functions of each part are as follows: the pressure transmitter installed on the water supply pipe converts the pipe pressure into an electrical signal of volts; The frequency converter is used to regulate the speed of the water pump to regulate the flow; PLC is used for logic switching

in addition, the above system is also equipped with peripheral auxiliary circuits to ensure that when the automatic control system fails, the system operation can be maintained through manual adjustment to ensure continuous production

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