VFD Gets Performance Boost

May 13, 2011
The L700 Series of industrial AC variable frequency drives significantly expands on the performance, capabilities and functions of its predecessor, the L300P.

Enhancements include use of an improved sensorless vector (SLV) control algorithm that allows the L700 to develop 150% torque at 0.5Hz, suiting it well for applications beyond just fans and pumps. Another notable upgrade is the EzSQ (Easy Sequence) built-in programming function, which provides the functionality of a PLC built into the L700 inverter. In many cases, the need for a separate PLC can be eliminated due to this internal capability, says the vendor. Other new L700 features include patented micro-surge voltage suppression to protect the motor winding insulation, advanced trip avoidance functions, configurable sink/source logic on digital inputs, built-in dynamic braking circuit in models up to 30hp (22kW) and a built-in EMC filter in models up to 200hp (160kW).
Hitachi America Ltd.

Industrial Components and Equipment Division

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