LIANCHUANG GAOKE AUTOMATION
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SHANDONG LIANCHUANG GAOKE AUTOMATION CO.,LTD.
Variable Frequency Drive for Irrigation Pump System: Single Phase Power for Farm Water Pumps
Release date:
2026-11-11
At Shandong Lianchuang Gaoke Automation we build the variable frequency drive for irrigation pump system around a problem we see on many farms: the site has a single phase 220V supply, while the pump motor is a three phase 380V machine. The LC400T series converts the power that is available into a stable three phase output, so the pump can run without waiting for a new three phase line. The cabinet is designed for occasions where three phase power is lacking, and the wiring is kept simple enough for a local electrician to follow.
Why Irrigation Sites Run Into a Power Mismatch
Rural water pumping often starts from a single phase service. The pump house may be far from the transformer, and the cost of extending a three phase line can be hard to justify for one motor. A drive is not a generator and it does not create energy; it takes the single phase supply, rectifies it, and rebuilds a three phase waveform for the motor. That is why the first question is always the same: what is the supply on site, and what does the pump nameplate say. If those two numbers do not match, the drive is the usual way to close the gap.
How the LC400T Handles Single Phase to Three Phase Conversion
The LC400T accepts 1AC 220V or 3AC 380V input within plus or minus 15 percent, at 50 or 60Hz within plus or minus 5 percent. The output voltage follows the rated input voltage, and the output frequency reaches 500Hz in vector control or 2000Hz in V/f control. Our range for this pump model covers 1.5 to 55kW. The control section supports V/f control, sensorless vector control and closed loop vector control, so the same unit can run a constant speed pump or a system that needs better torque at low speed. The manual lists the exact rating for each power size, and we ask buyers to confirm the single phase input version before ordering.
Control Methods for Pump and Irrigation Work
The drive can be operated from the keypad, from terminal signals, or over serial communication. Frequency can be set digitally, by analog signal, by pulse frequency, by serial command, by multi-step speed, by simple PLC or by the built-in PID loop. For irrigation, the PID function is useful when the goal is to hold pressure or flow rather than a fixed speed: a pressure transmitter feeds the loop, the drive adjusts the output, and the pump follows demand instead of running flat out. The values depend on the pump curve, the pipe layout and the sensor range, so they should be set by someone who can test the system on site.
Protection Features That Matter in the Field
The LC400T carries 47 fault detection protections, including overcurrent, overvoltage, undervoltage, overheating, phase loss, overload and short circuit. Automatic voltage regulation holds the output steady when the input fluctuates, which is common on a rural feeder. Stall control limits current and voltage during a sudden load change, and the fault record keeps the running status from the moment of the trip. The rated ambient temperature is minus 10 to 40 degrees Celsius, with derating above 40, and humidity should stay at or below 90 percent without condensation. Altitude up to 1000m is rated; above that the output is derated.
Matching the Drive to an Irrigation Pump
Model choice starts with the motor nameplate, not with the pipe size. Rated power, voltage, current, frequency and duty cycle all matter, and the supply on site decides whether a single phase input model is needed. Cable length, ambient temperature, altitude and the starting load also affect the choice. For a new pump, send us the pump curve and the required head and flow. For an existing pump, send a photo of the nameplate and the supply details. We will confirm the power size and the input version before the order is placed.
Working With Lianchuang Gaoke
We have 20 years of production experience and describe ourselves as the largest VFD manufacturer in north of China, with factory inspection welcome at any time. Our software and hardware engineers work with customers on technical issues, and we offer OEM and ODM support, priority delivery, market protection for dealers and a set of consumable parts with the machines. Production is handled in one place, from the software and the hardware to the final test, which is how we keep the cost and the quality under one roof. Buyers who need a private label, a different terminal arrangement or a specific parameter set can discuss it with our team before the order.
Next Step
If you are planning an irrigation pump system and the site has single phase power, send us the pump nameplate, the required head and flow, the supply voltage and the quantity you need. We will reply with the matching LC400T model, the wiring information and the quotation, and we will explain the difference between the V/f and the vector settings in plain terms.
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