The A500L offers a 120:1 speed control range in drive mode and 25:1 in regenerative braking mode without encoder feedback. Low speed smoothness is unrivalled with torque ripple under 5 per cent at 3Hz. When used with a motor fitted with encoder feedback, the speed control range extends to 1000:1, speed variation range falls to under 0.02 per cent and the A500L can deliver short term zero speed holding torque of up to 150 per cent.
The A500L combines all of the features of the smaller A500 drives for driving motors up to 535 kW in size. Perfectly suited to applications such as pump and for speed control, the drives can be tailored to suit particular needs by fitting integral options like 12 pulse bridges and sinewave filters to protect the power quality on site.