Inverter fan pump control program in the pump application

1. Senlan pump frequency converter performance profile (1) BT12S series frequency converter Senlan BT12S series frequency converter, is the company for fans, pumps and mechanical design of dedicated digital converter, in addition to having a common Inverter functions, there are frequency conversion pump, variable frequency pump fixed two ways of regular rotation (access relay expansion board can be achieved, see the instruction manual). Inverter equipped PI regulator, is available in two input terminals of the VPF sensor feedback signal (voltage signal) and of IPF (current signals), and the FA signal terminal fire operation, a high level signal and low water terminals LA2 terminal LA1, and a pressure Upper and lower alarm output terminals 30PA, 30PB and 30PC. BT12S series inverters have unique settings of sleep value and wake value (parameters F66 and F67). When the water supply system has two or more pumps, according to user requirements set the appropriate sleep value and wake value. When the pressure is lower than the value of the sleep small pump; awake when the pressure is lower than the value of the main pump; Conversely, when the pressure is higher than the value of wake, the main pump is stopped, a small pump; sleep when the pressure is higher than the value, small The pump also stopped working and went to sleep. Senlan BT12S series inverter can also be used as a universal frequency converter. (2) SB60P and SB61P series frequency converter These two Senlan inverter circuit structure is the same, but different capacity range. Are using digital processor DSP vector control inverter, better performance. Inverter equipped with PID regulator, but also an external expansion board for multi-pump cycle. 2. Fan pump frequency converter control program Fan pump inverter with a variety of control methods, according to the specific circumstances of the selection. Here are some commonly used programs. (1) manual adjustment This is a kind of simplest control method, that is, the operator instructs the meter to manually adjust the frequency of the inverter to change the air volume or flow to meet the production requirements. This method is suitable for any type of frequency converter, commonly used in the technical transformation of old equipment. FWD is the forward signal input terminal, CM is the common terminal of input signal, SB is the changeover switch. When SB is closed, motor M is started in the forward direction; when SB is off, the motor is stopped. To retain the original device starting device, the baffle, the valve completely open, usually make KM1, KM3 connected, the use of inverter drive. If the frequency converter malfunctions or needs the overhaul, then disconnect KM3, make KM2 turn on, adopt original equipment starting device and flapper valve to operate. In order to ensure safety, KM2 and KM3 two contactors to interlock (including electrical and mechanical interlocking). (2) dual-bit inverter control This method is simple, reliable, easy to grasp, the basic accuracy to meet the requirements, is widely used in many demanding field. X4 and X5 two terminals, according to the inverter manual according to its provisions for the appropriate preset, it has the function of controlling the inverter speed and deceleration. SP for the electrical contact pressure gauge, SP1 and SP2, respectively, the pressure of the lower limit contacts and the upper limit contacts. Direct control of the state of X4 and X5. That is, when X4 is connected to CM, the output frequency fx of the inverter rises and stops rising when it is disconnected. When X5 and CM connected, fx down, fx stop falling off.