Sensorless Parameters Estimation of VFD Based Cascade Centrifugal Pumping System Using Automatic Pump Curve Adaption MethodAutomatic pump adaptationCentrifugal pumpsEnergy efficiencyParameter estimationVariable frequency drives (VFD)Sensor-lessSustainable development goal (SDG)...
V/F curve V/F Four modes : Line , Multi-point , Square V/F curve, V/F separation Jog control Jog frequency range:0.00Hz to F0-10(Max frequency) Accelerate/Decelerate curve Line or S-curve Acc/Dec mode, four kinds of Acc/Dec time Rangeof Acc/Dec Time0.0~65000.00s. DC brake ...
V/F Control V/F curve (voltage frequency characteristic) The reference frequency can be set arbitrarily between 5 and 600Hz, the multi-point V/F curve can be set arbitrarily, and various fixed curves such as constant torque, low reduction torque 1, low reduction torque 2, and square...
No.of V/F Patterns Vector curve, Random V/F curve Location Indoor(protected from corrosive gases and dust) Ambient temperature -10~40°C(If beyond the allowable degree, one degree will Derogate 5% output current) Storage temperature -40~60°C Environmental temperature 95%(wit...
(12) V/F curve can be adjusted according to load characteristics (13) Pulse train I/O function (14) Multi-speed control function (15) Stop deceleration/restart after instantaneous power failure (16) PID control function (17) Communication function (18) Main and auxiliary f...
Furthermore, its mechanical characteristics are not as difficult as those of a DC motor; its dynamic torque capacity and static speed regulation performance are not satisfactory, and the system performance is low; the control curve will change as the load changes; the torque response is slow, ...
We now take the fan as an instance of the principle in energy conservation. As show in following fig, when the fan in its rated rotation speed, the air volume and air pressure change as curve 1, which intersects with the pipe network resistance curve 2 at the rated working condition point...
Filter module: compact filter, protect well pump. IoT Module: Smart IoT, all in the cloud. >>> Smart monitoring brings smart irrigation Customize the PQ curve, and automatically calculate the flow rate, daily flow, cumulative flow, daily power generation, and cumulative pow...
V/F curve V/F Four modes : Line , Multi-point , Square V/F curve, V/F separation Jog control Jog frequency range:0.00Hz to F0-10(Max frequency) Accelerate/Decelerate curve Line or S-curve Acc/Dec mode, four kinds of Acc/Dec time Rangeof...
3 points adjustable V/f curve Built-in PID feedback control RFI-switch for IT mains Built-in EMI filter (for models 230V 1-phase and 460V 3-phase) Use RS-485 communication interface (RJ-45) with Modbus protocol Optional communication modules for multiple communication protocols, such as Pro...