What the LS590 is documented to do
The LS590 documentation describes a drive that implements high-performance vector control on a PMSM, integrating the process control used while driving an injection moulding machine — precise control of injection speed and pressure holding — with the stability control needed when working with the machine's own controller. Its stated applications are plastic moulding, pipe extrusion, shoe making, rubber production and metal die casting, where the servo drive controls the hydraulic servo pump. Multi-pump confluence is documented: drives can be paralleled to obtain the large flow a big machine needs.
Published performance figures
The LS590 documentation states the following performance in its application material; treat them as the series' documented figures for the hydraulic servo duty it describes, and ask for the values for your machine to be stated in the quotation.
- Injection position repeatability better than ±0.3 mm and pressure-holding fluctuation below ±0.5 bar, using vector control, fuzzy PID and pump-leakage oil-pressure compensation.
- System response time as low as 0.05 s.
- Output current and torque overloadable to 2.5 times rated value without tripping under high-pressure injection and heavy load impact.
- Energy saving of 40–65% — up to 80% in the documented comparison — against a fixed-displacement pump that returns excess flow through proportional valves.
- Machine noise below 70 dB in the documented offline injection-moulding state, and greatly reduced hydraulic oil temperature rise, cutting cooling-water demand.
- The documented hydraulic arrangement removes the proportional pressure and flow valves as energy-consuming components and simplifies the hydraulic pipeline; a built-in braking unit and braking resistor are also published, documented as reducing installation volume and cost.
Model table (published)
| Models | LS590-0075G / 0110G / 0150G / 0185G / 0220G / 0300G / 0370G / 0450G / 0550G / 0750G |
| Rated power | 7.5 / 11 / 15 / 18.5 / 22 / 30 / 37 / 45 / 55 / 75 kW (LS590) |
| Rated current | 17 / 25 / 32 / 37 / 45 / 60 / 75 / 91 / 112 / 150 A (LS590) |
| Power supply | 3-phase 350–420 V class, 50/60 Hz; allowed voltage range ±15%, frequency ±5% |
| Control mode | Closed-loop vector control (VC); V/F control |
| Maximum frequency / carrier | 300 Hz; carrier 1–8 kHz, auto-adjusted with load |
| Overload capacity | 150% of rated output current for 60 s; 180% for 3 s |
| Protection level / environment | IP20; −10 °C to +40 °C; humidity below 95% RH non-condensing; altitude below 1,000 m |
For the motor side of the system — pairing the drive with a permanent-magnet synchronous servo motor — see the servo motors page. Note the LS590 requires a pressure sensor for the hydraulic servo application (a necessary accessory in its documentation, with the sensor range set by parameter); state your sensor arrangement when you enquire.
Frequently asked questions
Which motors does the LS590 drive?
Permanent-magnet synchronous servo motors (PMSM). The drive implements closed-loop vector control on the motor and is documented for hydraulic servo pump duty as well as general-purpose servo functions.
What sizes are published?
Ten models from 7.5 kW (17 A) to 75 kW (150 A), three-phase 380 V class. Larger duties are handled by paralleling drives for multi-pump confluence, as documented.
Is the LS590 a positioning servo drive?
Its documented centre of gravity is hydraulic servo control for moulding-class machines — speed, pressure and flow control of a servo pump — with general-purpose servo functions. If your application is multi-axis positioning, describe it in the enquiry and ask whether the LS590 is suitable for it.
Send us your motor rating and application
Tell us the motor power, the supply voltage on site and what the drive will run — pump, fan, machine tool or lift. Minimum order is 1 piece on the main catalogue lines, as published on the platform store; ask for price and lead time for your model and quantity to be stated in the quotation. Email [email protected] or message us on WhatsApp.