40 hp (30 kW) heavy duty variable frequency drive, three phase 230V, 420V, 480V for choice.
||40 hp (30 kW)
||3 phase 230V /420V /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: Variable frequency drive advantage in injection molding machine energy saving retrofit
For the plastic products industry, power consumption is the main part of production cost, and injection molding machine is the main energy consumption equipment. At present, most of the injection molding machine is hydraulic transmission type, the power in hydraulic system is offered by the motor driven pump. During the injection molding cycle, the flow and pressure required for injection molding machines different processes are different under, and must be dependent on the flow valve and pressure valve to adjust the flow and pressure required for different processes. Hydraulic system has high load changes, because the quantitative pump can't adjust the output power, so the excess energy can only be consumed in the baffle, oil leakage, or oil temperature rise. This has exacerbated the wear of valves, too high oil temperature and too large noise, and the mechanical life can also be shorted. And in usually design, the motor design capacity for user pump is much higher than the actual needs, resulting in a lot of energy waste. Therefore, the promotion of AC variable frequency speed control device in the application of injection molding machine has great significance for reducing energy waste and saving production cost.
The VFD has incomparable advantages in the energy-saving retrofit of injection molding machine. When injection molding machine in frequency conversion retrofit wiring, retain the original computer control system, oil-line of hydraulic transmission system and motor Y-△ step-down start running circuit unchanged. And use variable frequency energy-saving / frequency operation conversion control mode to avoid affecting the normal production when failure occurred. When replacing the mold, only need to change the injection molding machine computer board working procedures, and don’t need to make any adjustments to the VFD.