Low cost 5 hp (3.7 / 4 kW) VFD, three phase 230V, 400V, 480V, high performance vector variable frequency drive, IP20 enclosure, RS485 enabled, brand new direct sale by manufacturer.
Delivery date: 6 - 12 Days
5 hp (4 kW) variable frequency drive, three phase 230V, 400V, 480V for selection.
||5 hp (3.7 kW)
||3 phase 230V /400V /480V AC ±15% (Optional)
||3 phase AC 0~input voltage
|Over load capacity
||150% of rated current for 1 minute, 180% of rated current for 3 seconds
Sensorless vector control;
||150% of rating torque at 1 Hz
|Speed control accuracy
||≤±0.5% of rating synchronous speed
||Digital setting: max frequency x± 0.01%;
Analog setting: max frequency x± 0.2%
||Analog setting: 0.1% of max frequency;
Digital setting: 0.01Hz
||Automatic torque boost, manual torque boost 0.1%~30.0%
|Interior PID controller
||Be convenient to make closed-loop system
|Automatic energy save running
||Optimize V/F curve automatically based on the load to realize power save running
|Automatic voltage regulation (AVR)
||Can keep constant output voltage when power source voltage varies.
|Automatic current limiting
||Limit running current automatically to avoid frequent over-current which will cause trip
||–10℃~ +40℃; VFD will be derated if ambient temperature exceed 40℃; each rise 1℃, the derate will be 5%
||5%-95%, without condensation
||≤1000m; VFD will be derated if above 1000m
|Impingement and oscillation
||Normal running:<5.9m/s2 (0.6g); Transportation:<15m/s2 (1.5g)
||–20℃~ +60℃; no dust, no corrosive gas, no direct sunlight
Tips: VFD vs Soft Starter in high starting torque application
Variable frequency drive (VFD) solution will solve in most cases the torque problem when using standard induction motor. Soft starter that reduce the toque might not deliver the required torque in effort to get to full speed. VFD with vector control is able produce higher torque in induction motor shaft than star delta or soft starter while also drawing less current from the power supply. This way you can have high torque during start, low current and after getting into full speed you bypass the VFD and save all the energy loses and noises that VFD caused.
If starting torque is not an issue in the installation, the start delta or soft starter are both OK. If you want to limit current rush in start or jam situation or you want to get higher starting torque then vector control VFD is a good selection and even better if closed loop with speed feedback from motor to VFD. Energy saving with VFD is achieved due to better control of magnetizing and rotor currents. It optimizes total current to motor thus reduces motor (and network) losses caused by excess current.
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